- What's New
- Function Overview
- Product Bulletin
- Service Overview
- Billing
- Getting Started
-
User Guide
- Permissions Management
- Buying a GaussDB Instance
- GaussDB Instance Connection
-
Database Migration
- Overview of GaussDB Migration Solutions
- Using DRS to Migrate Data from Oracle Database to GaussDB
- Using DRS to Migrate Data from MySQL Database to GaussDB
- Migrating Data to GaussDB Using the Export and Import Functions of DAS
- Using the copy to/from Command to Export and Import Data
- Using CopyManager in JDBC to Export and Import Data
- Using gs_dump and gs_dumpall to Export Data
- Using gs_restore to Import Data
- Using gs_loader to Import Data
- Database Use
-
Instance Management
- Viewing GaussDB Instance Overview Data
- Configuring Security Group Rules for a GaussDB Instance
- Binding and Unbinding an EIP for a GaussDB Instance
- Modifying the Recycle Bin Policy for a GaussDB Instance
- Exporting Information About All GaussDB Instances
- Unsubscribing a Yearly/Monthly GaussDB Instance
- Stopping a GaussDB Instance
- Starting a GaussDB Instance
- Rebooting a GaussDB Instance
- Deleting a Pay-per-Use GaussDB Instance
- Rebuilding a GaussDB Instance
- Stopping a GaussDB Node
- Starting a GaussDB Node
- Rebooting a GaussDB Node
-
Instance Modifications
- Changing the Name of a GaussDB Instance
- Changing the Database Port of a GaussDB Instance
- Changing the M Compatibility Port
- Changing the CPU and Memory Specifications of a GaussDB Instance
- Configuring Read Replicas
- Synchronizing Data to a Single-Replica Instance
- Viewing and Modifying Advanced Features
- Scaling In and Out an Instance
- Scaling Up Storage Space
- Changing the Deployment Model
- Performing a Primary/Standby DN Switchover
- Instance Upgrade
- Plug-in Management
- Data Backup
- Data Restoration
- Parameter Management
- Monitoring and Alarming
- Logs and Auditing
- Quota Adjustment
- SQL Diagnosis
-
Disaster Recovery Management
- Constraints
- Creating a DR Task
- Checking DR Task Statuses
- Promoting the DR Instance to Primary
- Stopping a DR Task
- Deleting a DR Task
- Re-creating a DR Task After the Primary Instance Is Faulty
- Switching Roles of Primary and DR Instances
- Re-establishing a DR Relationship
- Performing a DR Drill
- Enabling or Disabling Log Cache
- Restrictions on the DR Instance
- Managing GaussDB Tasks
- Managing GaussDB Tags
- Resetting the Administrator Password of a GaussDB Instance
-
Developer Guide
-
Developer Guide(Distributed_8.x)
- Database System Overview
- Database Security
- Database Quick Start
- Development and Design Proposal
-
Application Development Guide
- Development Specifications
- Obtaining the Driver Package
-
Development Based on JDBC
- JDBC Packages, Driver Classes, and Environment Classes
- Development Process
- Loading a Driver
- Connecting to a Database
- Connecting to a Database (Using SSL)
- Connecting to a Database (Using UDS)
- Running SQL Statements
- Processing Data in a Result Set
- Closing a Database Connection
- Log Management
- Examples: Common Operations
- Example: Retrying SQL Queries for Applications
- Example: Logic Replication Code
- Example: Parameters for Connecting to the Database in Different Scenarios
-
JDBC Interface Reference
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- PGReplicationConnection
- PGReplicationStream
- ChainedStreamBuilder
- ChainedCommonStreamBuilder
- Common JDBC Parameters
- FAQs
- JDBC Data Type Mapping
- Development Based on ODBC
- Development Based on libpq
- Psycopg-based Development
-
ECPG-based Development
- Development Process
- ECPG Components
- ECPG Preprocessing and Compiling
- Managing Database Connections
- Running SQL Commands
- Querying the Result Set
- Closing a Database Connection
- Host Variables
- Executing Dynamic SQL Statements
- Error Handling
- Preprocessor Directives
- Using Library Functions
- SQL Descriptor Area
- Examples
- ecpg and Pro*C Compatibility Comparison
- ECPG API Reference
- Development Based on the Go Driver
- Compatibility Reference
- Commissioning
-
SQL Optimization
- Query Execution Process
- Introduction to the SQL Execution Plan
- Optimization Process
- Updating Statistics
- Reviewing and Modifying a Table Definition
- Typical SQL Optimization Methods
- Experience in Rewriting SQL Statements
- Configuring Key Parameters for SQL Tuning
-
Hint-based Optimization
- Plan Hint Optimization
- Hint Specifying the Query Block Where the Hint Is Located
- Hint Specifying the Query Block and Schema of a Table
- Join Order Hints
- Join Operation Hints
- Rows Hints
- Stream Operation Hints
- Scan Hints
- Sublink Name Hints
- Skew Hints
- Parameterized Path Hint
- Hint Errors, Conflicts, and Other Warnings
- GUC Parameter Hints
- Hints for Selecting the Custom Plan or Generic Plan
- Hints Specifying Not to Expand Subqueries
- Hints Specifying Not to Use Global Plan Cache
- Hints of Parameterized Paths at the Same Level
- Hints for Setting Slow SQL Control Rules
- Bitmap Scan Hints
- Hint for Inner Table Materialization During Join
- AGG Hint
- Query Rewriting Hints
- Hints for Specifying ANY Sublink Pullup
- Hints for Specifying the Degree of Parallelism for Scans
- Hints for Specifying Whether to Use Semi-Join
- Hints for Specifying Whether to Use Minmax Optimization
- Checking the Implicit Conversion Performance
- Performing Optimization with SQL Patches
-
Optimization Cases
- Case: Selecting an Appropriate Distribution Key
- Case: Creating an Appropriate Index
- Case: Adjusting Distribution Keys
- Case: Adjusting the GUC Parameter best_agg_plan
- Case: Rewriting SQL Statements to Eliminate Subqueries
- Case: Rewriting SQL Statements to Eliminate Pruning Interference
- Case: Rewriting SQL Statements and Deleting in-clause
- Case: Modifying the GUC Parameter rewrite_rule
- Using DN Gather to Reduce Stream Nodes in the Plan
-
SQL Reference
- GaussDB SQL
- Keywords
-
Data Types
- Numeric Types
- Monetary Types
- Boolean Types
- Character Types
- Binary Types
- Date/Time Types
- Geometric Types
- Network Address Types
- Bit String Types
- UUID Type
- JSON/JSONB Types
- HLL Type
- Range Types
- Object Identifier Types
- Pseudo-Types
- Data Types Used by the Ledger Database
- XML Type
- XMLType
- ACLItem Type
- Array Types
-
Character Sets and Collations
- Character Sets and Collations of the Client Connection
- Database-level Character Sets and Collations
- Schema-level Character Sets and Collations
- Table-level Character Sets and Collations
- Column-level Character Sets and Collations
- Character Sets and Collations of Expressions of the String Type
- Rules for Combining Character Sets and Collations
- Constant and Macro
-
Functions and Operators
- Logical Operators
- Comparison Operators
- Character Processing Functions and Operators
- Binary String Functions and Operators
- Bit String Functions and Operators
- Pattern Matching Operators
- Arithmetic Functions and Operators
- Date and Time Processing Functions and Operators
- Type Conversion Functions
- Geometric Functions and Operators
- Network Address Functions and Operators
- Text Search Functions and Operators
- JSON/JSONB Functions and Operators
- HLL Functions and Operators
- SEQUENCE Functions
- Array Functions and Operators
- Range Functions and Operators
- Aggregate Functions
- Window Functions
- Security Functions
- Ledger Database Functions
- Encrypted Functions and Operators
- Set Returning Functions
- Conditional Expression Functions
- System Information Functions
-
System Administration Functions
- Configuration Setting Functions
- Universal File Access Functions
- Server Signal Functions
- Backup and Restoration Control Functions
- Dual-Cluster DR Control Functions
- Dual-Cluster DR Query Functions
- Snapshot Synchronization Functions
- Database Object Functions
- Advisory Lock Functions
- Logical Replication Functions
- Segment-Page Storage Functions
- Hash Bucket System Functions
- Undo System Functions
- Other Functions
- SPM Functions
- Statistics Information Functions
- Trigger Functions
- Hash Functions
- Prompt Message Function
- Fault Injection System Function
- Redistribution Functions
- Distribution Key Recommendation Functions
- Other System Functions
- Internal Functions
- AI Feature Functions
- Sensitive Data Discovery Function
- Dynamic Data Masking Functions
- Hotkey Feature Functions
- Global SysCache Functions
- Data Damage Detection and Repair Functions
- Functions of the XML Type
- Functions of the XMLType Type
- Pivot Table Functions
- UUID Functions
- SQL Statement Concurrency Control Function
- Obsolete Functions
- Expressions
- Pseudocolumn
- Type Conversion
- System Operation
- Controlling Transactions
-
SQL Syntax
- SQL Syntax
- DCL Syntax Overview
- DDL Syntax Overview
- DML Syntax Overview
- Other Syntax List
-
A
- ABORT
- ALTER AGGREGATE
- ALTER AUDIT POLICY
- ALTER COLUMN ENCRYPTION KEY
- ALTER COORDINATOR
- ALTER DATABASE
- ALTER DATABASE LINK
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER FOREIGN DATA WRAPPER
- ALTER FUNCTION
- ALTER GLOBAL CONFIGURATION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER NODE
- ALTER NODE GROUP
- ALTER RESOURCE LABEL
- ALTER RESOURCE POOL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLESPACE
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER VIEW
- ANALYZE | ANALYSE
- B
-
C
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- COPY
- CREATE AGGREGATE
- CREATE AUDIT POLICY
- CREATE BARRIER
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE CONVERSION
- CREATE DATABASE
- CREATE DATABASE LINK
- CREATE DIRECTORY
- CREATE EXTENSION
- CREATE FOREIGN DATA WRAPPER
- CREATE FUNCTION
- CREATE GLOBAL INDEX
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE NODE
- CREATE NODE GROUP
- CREATE PROCEDURE
- CREATE RESOURCE LABEL
- CREATE RESOURCE POOL
- CREATE ROLE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE SCHEMA
- CREATE SECURITY LABEL
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLESPACE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE VIEW
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
-
D
- DEALLOCATE
- DECLARE
- DELETE
- DO
- DROP AGGREGATE
- DROP AUDIT POLICY
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATABASE LINK
- DROP DIRECTORY
- DROP FOREIGN DATA WRAPPER
- DROP FUNCTION
- DROP GLOBAL CONFIGURATION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP NODE
- DROP NODE GROUP
- DROP OWNED
- DROP PROCEDURE
- DROP RESOURCE LABEL
- DROP RESOURCE POOL
- DROP ROLE
- DROP ROW LEVEL SECURITY POLICY
- DROP SCHEMA
- DROP SECURITY LABEL
- DROP SEQUENCE
- DROP SERVER
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP VIEW
- DROP WEAK PASSWORD DICTIONARY
- E
- F
- G
- I
- L
- M
- P
- R
- S
- T
- U
- V
- Appendix
- Best Practices
- User-defined Functions
- Stored Procedures
- Autonomous Transaction
-
System Catalogs and System Views
- Overview of System Catalogs and System Views
-
System Catalogs
- Partitioned Table
- OLTP Table Compression
- Encrypted Equality Query
- Communications
- Ledger Database
- SPM
- AI
- Auditing
- User and Permission Management
- Connection and Authentication
- Dynamic Data Masking
- DATABASE LINK
- Materialized Views
-
Other System Catalogs
- GS_ASP
- GS_DEPENDENCIES
- GS_DEPENDENCIES_OBJ
- GS_GLOBAL_CONFIG
- GS_JOB_ATTRIBUTE
- GS_JOB_ARGUMENT
- GS_PLAN_TRACE
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_SECURITY_LABEL
- GS_SQL_PATCH
- GS_STATISTIC_EXT_HISTORY
- GS_STATISTIC_HISTORY
- GS_TABLESTATS_HISTORY
- GS_TXN_SNAPSHOT
- GS_UID
- GS_WORKLOAD_RULE
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EXTENSION
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_HASHBUCKET
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PLTEMPLATE
- PG_PROC
- PG_RANGE
- PG_REPLICATION_ORIGIN
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_SET
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PGXC_CLASS
- PGXC_GROUP
- PGXC_SLICE
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- STREAMING_STREAM
- STREAMING_CONT_QUERY
-
System Views
-
Partitioned Table
- ADM_IND_PARTITIONS
- ADM_IND_SUBPARTITIONS
- ADM_PART_COL_STATISTICS
- ADM_PART_INDEXES
- ADM_PART_TABLES
- ADM_SUBPART_KEY_COLUMNS
- ADM_TAB_PARTITIONS
- DB_IND_PARTITIONS
- DB_IND_SUBPARTITIONS
- DB_PART_COL_STATISTICS
- DB_PART_KEY_COLUMNS
- DB_PART_TABLES
- DB_SUBPART_KEY_COLUMNS
- DB_TAB_PARTITIONS
- DB_TAB_SUBPARTITIONS
- MY_IND_PARTITIONS
- MY_IND_SUBPARTITIONS
- MY_PART_COL_STATISTICS
- MY_PART_INDEXES
- MY_PART_KEY_COLUMNS
- MY_PART_TABLES
- MY_SUBPART_KEY_COLUMNS
- MY_TAB_PARTITIONS
- GS_STATIO_ALL_PARTITIONS
- GS_STAT_XACT_ALL_PARTITIONS
- GS_STAT_ALL_PARTITIONS
- OLTP Table Compression
-
Communications
- COMM_CLIENT_INFO
- GLOBAL_COMM_CLIENT_INFO
- GS_COMM_LISTEN_ADDRESS_EXT_INFO
- GS_GET_LISTEN_ADDRESS_EXT_INFO
- GS_LIBCOMM_FD_INFO
- GS_LIBCOMM_MEMORY_INFO
- GS_STATIC_THREADPOOL_CTRL_STATUS
- PG_COMM_DELAY
- PG_COMM_RECV_STREAM
- PG_COMM_SEND_STREAM
- PG_COMM_STATUS
- PG_GET_INVALID_BACKENDS
- PG_POOLER_STATUS
- PGXC_COMM_DELAY
- PGXC_COMM_RECV_STREAM
- PGXC_COMM_SEND_STREAM
- PGXC_COMM_STATUS
-
Segment-Page Storage
- GLOBAL_GS_SEG_DATAFILES
- GLOBAL_GS_SEG_EXTENTS
- GLOBAL_GS_SEG_SEGMENTS
- GLOBAL_GS_SEG_SPC_EXTENTS
- GLOBAL_GS_SEG_SPC_SEGMENTS
- GS_SEG_DATAFILES
- GS_SEG_DATAFILE_LAYOUT
- GS_SEG_EXTENTS
- GS_SEG_SEGMENTS
- GS_SEG_SEGMENT_LAYOUT
- GS_SEG_SPC_EXTENTS
- GS_SEG_SPC_SEGMENTS
- GS_SEG_SPC_REMAIN_EXTENTS
- GS_SEG_SPC_REMAIN_SEGMENTS
- SPM
- Auditing
-
User and Permission Management
- ADM_COL_PRIVS
- ADM_ROLE_PRIVS
- ADM_ROLES
- ADM_SYS_PRIVS
- ADM_TAB_PRIVS
- ADM_USERS
- DB_COL_PRIVS
- DB_DIRECTORIES
- DB_TAB_PRIVS
- DB_USERS
- GS_DB_PRIVILEGES
- GS_LABELS
- MY_COL_PRIVS
- MY_ROLE_PRIVS
- MY_SYS_PRIVS
- PG_RLSPOLICIES
- PG_ROLES
- PG_SECLABELS
- PG_SHADOW
- PG_USER
- PG_USER_MAPPINGS
- ROLE_ROLE_PRIVS
- ROLE_SYS_PRIVS
- ROLE_TAB_PRIVS
- Dynamic Data Masking
- Transparent Encryption
- DATABASE LINK
- Materialized Views
-
Other System Views
- ADM_ARGUMENTS
- ADM_COL_COMMENTS
- ADM_COLL_TYPES
- ADM_CONS_COLUMNS
- ADM_CONSTRAINTS
- ADM_DATA_FILES
- ADM_DEPENDENCIES
- ADM_DIRECTORIES
- ADM_HIST_SNAPSHOT
- ADM_HIST_SQL_PLAN
- ADM_HIST_SQLSTAT
- ADM_HIST_SQLTEXT
- ADM_IND_COLUMNS
- ADM_IND_EXPRESSIONS
- ADM_INDEXES
- ADM_OBJECTS
- ADM_PROCEDURES
- ADM_SCHEDULER_JOB_ARGS
- ADM_SCHEDULER_JOBS
- ADM_SCHEDULER_PROGRAM_ARGS
- ADM_SCHEDULER_PROGRAMS
- ADM_SCHEDULER_RUNNING_JOBS
- ADM_SEGMENTS
- ADM_SEQUENCES
- ADM_SOURCE
- ADM_SYNONYMS
- ADM_TAB_COL_STATISTICS
- ADM_TAB_COLS
- ADM_TAB_COLUMNS
- ADM_TAB_COMMENTS
- ADM_TAB_HISTOGRAMS
- ADM_TAB_STATISTICS
- ADM_TAB_STATS_HISTORY
- ADM_TABLES
- ADM_TABLESPACES
- ADM_TRIGGERS
- ADM_TYPE_ATTRS
- ADM_TYPES
- ADM_VIEWS
- DB_ARGUMENTS
- DB_ALL_TABLES
- DB_COL_COMMENTS
- DB_COLL_TYPES
- DB_CONS_COLUMNS
- DB_CONSTRAINTS
- DB_DEPENDENCIES
- DB_IND_COLUMNS
- DB_IND_EXPRESSIONS
- DB_INDEXES
- DB_OBJECTS
- DB_PROCEDURES
- DB_SCHEDULER_JOB_ARGS
- DB_SCHEDULER_PROGRAM_ARGS
- DB_SEQUENCES
- DB_SOURCE
- DB_SYNONYMS
- DB_TAB_COL_STATISTICS
- DB_TAB_COLUMNS
- DB_TAB_COMMENTS
- DB_TAB_HISTOGRAMS
- DB_TAB_MODIFICATIONS
- DB_TAB_STATS_HISTORY
- DB_TABLES
- DB_TRIGGERS
- DB_TYPES
- DB_VIEWS
- DICT
- DICTIONARY
- DUAL
- DV_SESSIONS
- DV_SESSION_LONGOPS
- GET_GLOBAL_PREPARED_XACTS
- GLOBAL_BAD_BLOCK_INFO
- GLOBAL_CLEAR_BAD_BLOCK_INFO
- GLOBAL_SQL_PATCH
- GLOBAL_STAT_HOTKEYS_INFO
- GLOBAL_WAL_SENDER_STATUS
- GS_ALL_CONTROL_GROUP_INFO
- GS_ALL_PREPARED_STATEMENTS
- GS_BUCKET_LOCKS
- GS_GET_CONTROL_GROUP_INFO
- GS_GLOBAL_ARCHIVE_STATUS
- GS_GSC_MEMORY_DETAIL
- GS_LSC_MEMORY_DETAIL
- GS_MY_PLAN_TRACE
- GS_SESSION_ALL_SETTINGS
- GS_SQL_COUNT
- GS_WORKLOAD_RULE_STAT
- GV_INSTANCE
- GV_SESSION
- MPP_TABLES
- MY_AUDIT_TRAIL
- MY_COL_COMMENTS
- MY_COLL_TYPES
- MY_CONS_COLUMNS
- MY_CONSTRAINTS
- MY_DEPENDENCIES
- MY_IND_COLUMNS
- MY_IND_EXPRESSIONS
- MY_INDEXES
- MY_JOBS
- MY_OBJECTS
- MY_PROCEDURES
- MY_SCHEDULER_JOB_ARGS
- MY_SCHEDULER_JOBS
- MY_SCHEDULER_PROGRAM_ARGS
- MY_SEQUENCES
- MY_SOURCE
- MY_SYNONYMS
- MY_TAB_COL_STATISTICS
- MY_TAB_COLUMNS
- MY_TAB_COMMENTS
- MY_TAB_HISTOGRAMS
- MY_TAB_MODIFICATIONS
- MY_TAB_STATS_HISTORY
- MY_TAB_STATISTICS
- MY_TABLES
- MY_TABLESPACES
- MY_TRIGGERS
- MY_TYPE_ATTRS
- MY_TYPES
- MY_VIEWS
- NLS_DATABASE_PARAMETERS
- NLS_INSTANCE_PARAMETERS
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_AVAILABLE_EXTENSIONS
- PG_CONTROL_GROUP_CONFIG
- PG_CURSORS
- PG_EXT_STATS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_REPLICATION_SLOTS
- PG_RULES
- PG_RUNNING_XACTS
- PG_SETTINGS
- PG_SHARED_MEMORY_DETAIL
- PG_STATS
- PG_STAT_ACTIVITY
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_REPLICATION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_TABLES
- PG_THREAD_WAIT_STATUS
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_VARIABLE_INFO
- PG_VIEWS
- PGXC_GET_STAT_ALL_TABLES
- PGXC_GET_TABLE_SKEWNESS
- PGXC_NODE_ENV
- PGXC_OS_THREADS
- PGXC_PREPARED_XACTS
- PGXC_RUNNING_XACTS
- PGXC_STAT_ACTIVITY
- PGXC_STAT_BAD_BLOCK
- PGXC_SQL_COUNT
- PGXC_THREAD_WAIT_STATUS
- PGXC_TOTAL_MEMORY_DETAIL
- PGXC_VARIABLE_INFO
- PLAN_TABLE
- PV_FILE_STAT
- PV_INSTANCE_TIME
- PV_OS_RUN_INFO
- PV_REDO_STAT
- PV_SESSION_MEMORY
- PV_SESSION_MEMORY_CONTEXT
- PV_SESSION_MEMORY_DETAIL
- PV_SESSION_STAT
- PV_SESSION_TIME
- PV_THREAD_MEMORY_CONTEXT
- PV_TOTAL_MEMORY_DETAIL
- SYS_DUMMY
- V_INSTANCE
- V_MYSTAT
- V_SESSION
- V$GLOBAL_OPEN_CURSOR
- V$GLOBAL_TRANSACTION
- V$LOCK
- V$NLS_PARAMETERS
- V$OPEN_CURSOR
- V$SESSION_WAIT
- V$SYSSTAT
- V$SYSTEM_EVENT
- V$VERSION
-
Partitioned Table
- Discarded
-
Schemas
- Information Schema
-
DBE_PERF Schema
- OS
- Instance
- File
-
Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
- GLOBAL_STAT_XACT_ALL_TABLES
- STAT_XACT_SYS_TABLES
- SUMMARY_STAT_XACT_SYS_TABLES
- GLOBAL_STAT_XACT_SYS_TABLES
- STAT_XACT_USER_TABLES
- SUMMARY_STAT_XACT_USER_TABLES
- GLOBAL_STAT_XACT_USER_TABLES
- STAT_XACT_USER_FUNCTIONS
- SUMMARY_STAT_XACT_USER_FUNCTIONS
- GLOBAL_STAT_XACT_USER_FUNCTIONS
- STAT_BAD_BLOCK
- SUMMARY_STAT_BAD_BLOCK
- GLOBAL_STAT_BAD_BLOCK
- STAT_USER_FUNCTIONS
- SUMMARY_STAT_USER_FUNCTIONS
- GLOBAL_STAT_USER_FUNCTIONS
- Workload
-
Session and Thread
- SESSION_STAT
- GLOBAL_SESSION_STAT
- SESSION_TIME
- GLOBAL_SESSION_TIME
- SESSION_MEMORY
- GLOBAL_SESSION_MEMORY
- SESSION_MEMORY_DETAIL
- GLOBAL_SESSION_MEMORY_DETAIL
- SESSION_STAT_ACTIVITY
- GLOBAL_SESSION_STAT_ACTIVITY
- THREAD_WAIT_STATUS
- GLOBAL_THREAD_WAIT_STATUS
- LOCAL_THREADPOOL_STATUS
- GLOBAL_THREADPOOL_STATUS
- SESSION_CPU_RUNTIME
- SESSION_MEMORY_RUNTIME
- LOCAL_ACTIVE_SESSION
- GLOBAL_ACTIVE_SESSION
- Transaction
-
Cache and I/O
- STATIO_USER_TABLES
- SUMMARY_STATIO_USER_TABLES
- GLOBAL_STATIO_USER_TABLES
- STATIO_USER_INDEXES
- SUMMARY_STATIO_USER_INDEXES
- GLOBAL_STATIO_USER_INDEXES
- STATIO_USER_SEQUENCES
- SUMMARY_STATIO_USER_SEQUENCES
- GLOBAL_STATIO_USER_SEQUENCES
- STATIO_SYS_TABLES
- SUMMARY_STATIO_SYS_TABLES
- GLOBAL_STATIO_SYS_TABLES
- STATIO_SYS_INDEXES
- SUMMARY_STATIO_SYS_INDEXES
- GLOBAL_STATIO_SYS_INDEXES
- STATIO_SYS_SEQUENCES
- SUMMARY_STATIO_SYS_SEQUENCES
- GLOBAL_STATIO_SYS_SEQUENCES
- STATIO_ALL_TABLES
- SUMMARY_STATIO_ALL_TABLES
- GLOBAL_STATIO_ALL_TABLES
- STATIO_ALL_INDEXES
- SUMMARY_STATIO_ALL_INDEXES
- GLOBAL_STATIO_ALL_INDEXES
- STATIO_ALL_SEQUENCES
- SUMMARY_STATIO_ALL_SEQUENCES
- GLOBAL_STATIO_ALL_SEQUENCES
- Communication Library
-
Utility
- REPLICATION_STAT
- GLOBAL_REPLICATION_STAT
- REPLICATION_SLOTS
- GLOBAL_REPLICATION_SLOTS
- BGWRITER_STAT
- GLOBAL_BGWRITER_STAT
- POOLER_STATUS
- GLOBAL_COMM_CHECK_CONNECTION_STATUS
- GLOBAL_CKPT_STATUS
- GLOBAL_DOUBLE_WRITE_STATUS
- GLOBAL_PAGEWRITER_STATUS
- GLOBAL_POOLER_STATUS
- GLOBAL_RECORD_RESET_TIME
- GLOBAL_REDO_STATUS
- GLOBAL_RECOVERY_STATUS
- CLASS_VITAL_INFO
- USER_LOGIN
- SUMMARY_USER_LOGIN
- GLOBAL_GET_BGWRITER_STATUS
- GLOBAL_SINGLE_FLUSH_DW_STATUS
- GLOBAL_CANDIDATE_STATUS
- PARALLEL_DECODE_STATUS
- GLOBAL_PARALLEL_DECODE_STATUS
- PARALLEL_DECODE_THREAD_INFO
- GLOBAL_PARALLEL_DECODE_THREAD_INFO
- GLOBAL_ADIO_COMPLETER_STATUS
- GLOBAL_AIO_SLOT_USAGE_STATUS
- Lock
- Wait Event
- Configuration
- Operator
- Workload Manager
- Global Plan Cache
- RTO & RPO
- AI Watchdog
- Discarded
- WDR Snapshot Schema
-
DBE_SQL_UTIL Schema
- DBE_SQL_UTIL.create_hint_sql_patch
- DBE_SQL_UTIL.create_abort_sql_patch
- DBE_SQL_UTIL.drop_sql_patch
- DBE_SQL_UTIL.enable_sql_patch
- DBE_SQL_UTIL.disable_sql_patch
- DBE_SQL_UTIL.show_sql_patch
- DBE_SQL_UTIL.create_hint_sql_patch
- DBE_SQL_UTIL.create_abort_sql_patch
- DBE_SQL_UTIL.create_remote_hint_sql_patch
- DBE_SQL_UTIL.create_remote_abort_sql_patch
- DBE_SQL_UTIL.drop_remote_sql_patch
- DBE_SQL_UTIL.enable_remote_sql_patch
- DBE_SQL_UTIL.disable_remote_sql_patch
-
DBE_PLDEBUGGER Schema
- DBE_PLDEBUGGER.turn_on
- DBE_PLDEBUGGER.turn_off
- DBE_PLDEBUGGER.local_debug_server_info
- DBE_PLDEBUGGER.attach
- DBE_PLDEBUGGER.info_locals
- DBE_PLDEBUGGER.next
- DBE_PLDEBUGGER.continue
- DBE_PLDEBUGGER.abort
- DBE_PLDEBUGGER.print_var
- DBE_PLDEBUGGER.info_code
- DBE_PLDEBUGGER.step
- DBE_PLDEBUGGER.add_breakpoint
- DBE_PLDEBUGGER.delete_breakpoint
- DBE_PLDEBUGGER.info_breakpoints
- DBE_PLDEBUGGER.backtrace
- DBE_PLDEBUGGER.enable_breakpoint
- DBE_PLDEBUGGER.disable_breakpoint
- DBE_PLDEBUGGER.finish
- DBE_PLDEBUGGER.set_var
- DBE_PLDEBUGGER.backtrace
- DBE_PLDEBUGGER.error_end
- DBE_PLDEBUGGER.error_info_locals
-
Configuring GUC Parameters
- Viewing Parameters
- Setting Parameters
-
GUC Parameters
- GUC Parameter Usage
- File Location
- Connection and Authentication
- Resource Consumption
- Parallel Data Import
- Write Ahead Log
- HA Replication
- Query Planning
- Error Reporting and Logging
- Alarm Detection
- Statistics During the Database Running
- Autovacuum
- Default Settings of Client Connection
- Lock Management
- Version and Platform Compatibility
- Fault Tolerance
- Connection Pool Parameters
- Cluster Transaction Parameters
- Dual-Cluster Replication Parameters
- Developer Options
- Auditing
- Transaction Monitoring
- CM Parameters
- GTM Parameters
- Upgrade Parameters
- Miscellaneous Parameters
- Wait Event
- Query
- System Performance Snapshot
- Security Configuration
- HyperLogLog
- User-defined Functions
- Scheduled Task
- Thread Pool
- Backup and Restoration
- AI Features
- Global SysCache Parameters
- Read Parameters of the Standby Node in a Distributed System
- Restoring Data on the Standby Node
- Undo
- Rollback Parameters
- DCF Parameters Settings
- Flashback
- Ledger Database
- Creating an Index Online
- Data Lifecycle Management: OLTP Table Compression
- Session-level Transaction Pushdown and Related Parameters
- Enhanced TOAST
- Reserved Parameters
- Appendix
-
FAQs
- What is the maximum number of columns in a single GaussDB table?
- How do I query the partition and index information of a partitioned table?
- What is OID?
- What is UDF?
- What wildcards are supported in GaussDB? How do I use them?
- Is there a limit on the length of a database object name?
- How do I view the creation time of a table?
- How do I create indexes in parallel?
- How do I create an auto-increment column?
- Can I query the GaussDB memory usage through SQL statements?
- What are the differences between LIMIT 2, LIMIT 2,3 and LIMIT 2 OFFSET 3?
- How do I create a column whose default value is the current time?
- How do I determine whether a column is null?
- How do I obtain the username for connecting to a database?
- How do I query the time difference between two time points?
- What are the types of SQL languages?
- What is the function of a trigger?
- What are the four characteristics of correctly executing database transactions?
- What are the differences between the DROP, TRUNCATE, and DELETE methods in GaussDB?
- How many bytes does a Chinese character occupy in GaussDB?
-
Developer Guide(Centralized_8.x)
- Database System Overview
- Database Security
- Database Quick Start
- Development and Design Proposal
-
Application Development Guide
- Development Specifications
- Obtaining the Driver Package
-
Development Based on JDBC
- JDBC Packages, Driver Classes, and Environment Classes
- Development Process
- Loading the Driver
- Connecting to a Database
- Connecting to a Database (Using SSL)
- Connecting to a Database (Using UDS)
- Running SQL Statements
- Processing Data in a Result Set
- Closing a Database Connection
- Log Management
- Examples: Common Operations
- Example: Retrying SQL Queries for Applications
- Example: Importing and Exporting Data Through Local Files
- Example: Migrating Data from MY
- Example: Logic Replication Code
- Example: Parameters for Connecting to the Database in Different Scenarios
-
JDBC API Reference
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- PGReplicationConnection
- PGReplicationStream
- ChainedStreamBuilder
- ChainedCommonStreamBuilder
- PGobject
- Common JDBC Parameters
- Troubleshooting
- Mapping for JDBC Data Types
- Development Based on ODBC
- Development Based on libpq
- Psycopg-based Development
- Development Based on the Go Driver
-
ECPG-based Development
- Development Process
- ECPG Components
- ECPG Preprocessing and Compiling
- Managing Database Connections
- Running SQL Commands
- Querying the Result Set
- Closing a Database Connection
- Host Variables
- Executing Dynamic SQL Statements
- Error Handling
- Preprocessor Directives
- Using Library Functions
- SQL Descriptor Area
- Examples
- ecpg and Pro*C Compatibility Comparison
- ECPG API Reference
- Compatibility Reference
- Commissioning
-
SQL Optimization
- Query Execution Process
- Introduction to the SQL Execution Plan
- Optimization Process
- Updating Statistics
- Reviewing and Modifying a Table Definition
- Typical SQL Optimization Methods
- Experience in Rewriting SQL Statements
- Configuring Key Parameters for SQL Tuning
-
Hint-based Optimization
- Plan Hint Optimization
- Hints for Specifying the Query Block Where the Hint Is Located
- Hints for Specifying the Query Block and Schema of a Table
- Join Order Hints
- Join Operation Hints
- Rows Hints
- Stream Operation Hints
- Scan Operation Hints
- Sublink Name Hints
- Hint Errors, Conflicts, and Other Warnings
- Optimizer GUC Parameter Hints
- Hints for Selecting the Custom Plan or Generic Plan
- Hints Specifying Not to Expand Subqueries
- Hint Specifying Not to Use Global Plan Cache
- Hints of Parameterized Paths at the Same Level
- Hints for Setting Slow SQL Control Rules
- Hint for Adaptive Plan Selection
- Hints for Materializing a Sub-plan Result
- Bitmap Scan Hints
- Hints for Inner Table Materialization During Join
- AGG Hint
- Query Rewriting Hints
- Outline Hints
- Hints for Specifying ANY Sublink Pullup
- Hints for Specifying the Degree of Parallelism for Scans
- Hints for Specifying Whether to Use Semi-Join
- Hints for Specifying the Stream Hashagg Optimization
- Hints for Specifying Whether to Use Minmax Optimization
- Introduction to Plan Trace
- Performing Optimization with SQL Patches
- Optimization Cases
-
SQL Reference
- GaussDB SQL
- Keywords
-
Data Types
- Numeric Types
- Monetary Types
- Boolean Types
- Character Types
- Binary Types
- Date/Time Types
- Geometric Types
- Network Address Types
- Bit String Types
- UUID Type
- JSON/JSONB Types
- HLL Type
- Range Types
- Object Identifier Types
- Pseudo-Types
- XML Type
- XMLType
- Data Types Used by the Ledger Database
- SET Type
- ACLItem Type
- Array Types
- Vector Data Types
-
Character Sets and Collations
- Character Sets and Collations of the Client Connection
- Database-level Character Sets and Collations
- Schema-level Character Sets and Collations
- Table-level Character Sets and Collations
- Column-level Character Sets and Collations
- Character Sets and Collations of Expressions of the String Type
- Rules for Combining Character Sets and Collations
- Constant and Macro
-
Functions and Operators
- Logical Operators
- Comparison Operators
- Character Processing Functions and Operators
- Binary String Functions and Operators
- Bit String Functions and Operators
- Pattern Matching Operators
- Arithmetic Functions and Operators
- Date and Time Processing Functions and Operators
- Type Conversion Functions
- Geometric Functions and Operators
- Network Address Functions and Operators
- Text Search Functions and Operators
- JSON/JSONB Functions and Operators
- HLL Functions and Operators
- SEQUENCE Functions
- Array Functions and Operators
- Range Functions and Operators
- Aggregate Functions
- Window Functions
- Security Functions
- Ledger Database Functions
- Encrypted Functions and Operators
- Set Returning Functions
- Conditional Expression Functions
- System Information Functions
-
System Administration Functions
- Configuration Settings Functions
- Universal File Access Functions
- Server Signal Functions
- Backup and Restoration Control Functions
- DR Control Functions for Dual-Database Instances
- DR Query Functions for Dual-Database Instances
- Snapshot Synchronization Functions
- Database Object Functions
- Advisory Lock Functions
- Logical Replication Functions
- Segment-Page Storage Functions
- Hash Bucket System Functions
- Other Functions
- Undo System Functions
- SPM Functions
- Statistics Information Functions
- Trigger Functions
- Hash Functions
- Prompt Message Function
- Global Temporary Table Functions
- Fault Injection System Function
- AI Feature Functions
- Sensitive Data Discovery Function
- Dynamic Data Masking Functions
- Hierarchical Recursion Query Functions
- Other System Functions
- Internal Functions
- Global SysCache Functions
- Data Damage Detection and Repair Functions
- Functions of the XML Type
- Functions of the XMLType Type
- Global PL/SQL Cache Functions
- Pivot Table Functions
- UUID Functions
- SQL Statement Concurrency Control Function
- Vector Calculation Interfaces and Functions
- Deprecated Functions
- Expressions
- Pseudocolumn
- Type Conversion
- System Operation
- Controlling Transactions
-
SQL Syntax
- SQL Syntax
- DCL Syntax Overview
- DDL Syntax Overview
- DML Syntax Overview
- Other Syntax List
-
A
- ABORT
- ALTER AGGREGATE
- ALTER AUDIT POLICY
- ALTER COLUMN ENCRYPTION KEY
- ALTER DATABASE
- ALTER DATABASE LINK
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER EVENT
- ALTER EXTENSION
- ALTER FOREIGN DATA WRAPPER
- ALTER FUNCTION
- ALTER GLOBAL CONFIGURATION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER OPERATOR
- ALTER PACKAGE
- ALTER PROCEDURE
- ALTER RESOURCE LABEL
- ALTER RESOURCE POOL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLE SUBPARTITION
- ALTER TABLESPACE
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER USER MAPPING
- ALTER VIEW
- ANALYZE | ANALYSE
- B
-
C
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- COPY
- CREATE AGGREGATE
- CREATE AUDIT POLICY
- CREATE CAST
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE CONVERSION
- CREATE DATABASE
- CREATE DATABASE LINK
- CREATE DIRECTORY
- CREATE EVENT
- CREATE EXTENSION
- CREATE FOREIGN DATA WRAPPER
- CREATE FUNCTION
- CREATE GLOBAL INDEX
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE OPERATOR
- CREATE OPERATOR CLASS
- CREATE PACKAGE
- CREATE PROCEDURE
- CREATE RESOURCE LABEL
- CREATE RESOURCE POOL
- CREATE ROLE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE RULE
- CREATE SCHEMA
- CREATE SECURITY LABEL
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TABLESPACE
- CREATE TABLE SUBPARTITION
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE USER MAPPING
- CREATE VIEW
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
-
D
- DEALLOCATE
- DECLARE
- DELETE
- DO
- DROP AGGREGATE
- DROP AUDIT POLICY
- DROP CAST
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATABASE LINK
- DROP DIRECTORY
- DROP EVENT
- DROP EXTENSION
- DROP FOREIGN DATA WRAPPER
- DROP FUNCTION
- DROP GLOBAL CONFIGURATION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP OPERATOR
- DROP OWNED
- DROP PACKAGE
- DROP PROCEDURE
- DROP RESOURCE LABEL
- DROP RESOURCE POOL
- DROP ROLE
- DROP ROW LEVEL SECURITY POLICY
- DROP RULE
- DROP SCHEMA
- DROP SECURITY LABEL
- DROP SEQUENCE
- DROP SERVER
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP USER MAPPING
- DROP VIEW
- DROP WEAK PASSWORD DICTIONARY
- E
- F
- G
- I
- L
- M
- P
- R
- S
- T
- U
- V
- Appendix
- Best Practices
- User-defined Functions
-
Stored Procedure
- Stored Procedure
- Data Types
- Data Type Conversion
- Arrays, Collections, and Records
- DECLARE Syntax
- Basic Statements
- Dynamic Statements
- Control Statements
- Transaction Management
- Other Statements
- Cursors
- Advanced Packages
- Retry Management
- Debugging
- Package
- Autonomous Transaction
-
System Catalogs and System Views
- Overview of System Catalogs and System Views
-
System Catalogs
- Partitioned Table
- OLTP Table Compression
- Encrypted Equality Query
- Communications
- Ledger Database
- SPM
- AI
- Auditing
- User and Permission Management
- Connection and Authentication
- Dynamic Data Masking
- DATABASE LINK
- Materialized Views
-
Other System Catalogs
- GS_ASP
- GS_DEPENDENCIES
- GS_DEPENDENCIES_OBJ
- GS_GLOBAL_CONFIG
- GS_JOB_ARGUMENT
- GS_JOB_ATTRIBUTE
- GS_PACKAGE
- GS_PLAN_TRACE
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_SECURITY_LABEL
- GS_SQL_PATCH
- GS_STATISTIC_EXT_HISTORY
- GS_STATISTIC_HISTORY
- GS_TABLESTATS_HISTORY
- GS_TXN_SNAPSHOT
- GS_UID
- GS_WORKLOAD_RULE
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EXTENSION
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_HASHBUCKET
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PLTEMPLATE
- PG_PROC
- PG_RANGE
- PG_REPLICATION_ORIGIN
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_SET
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PGXC_CLASS
- PGXC_GROUP
- PGXC_SLICE
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- STREAMING_STREAM
- STREAMING_CONT_QUERY
-
System Views
-
Partitioned Table
- ADM_IND_PARTITIONS
- ADM_IND_SUBPARTITIONS
- ADM_PART_COL_STATISTICS
- ADM_PART_INDEXES
- ADM_PART_TABLES
- ADM_SUBPART_COL_STATISTICS
- ADM_SUBPART_KEY_COLUMNS
- ADM_TAB_SUBPARTITIONS
- ADM_TAB_PARTITIONS
- DB_IND_PARTITIONS
- DB_IND_SUBPARTITIONS
- DB_PART_COL_STATISTICS
- DB_PART_INDEXES
- DB_PART_KEY_COLUMNS
- DB_PART_TABLES
- DB_SUBPART_COL_STATISTICS
- DB_SUBPART_KEY_COLUMNS
- DB_TAB_PARTITIONS
- DB_TAB_SUBPARTITIONS
- MY_IND_PARTITIONS
- MY_IND_SUBPARTITIONS
- MY_PART_COL_STATISTICS
- MY_PART_INDEXES
- MY_PART_KEY_COLUMNS
- MY_PART_TABLES
- MY_SUBPART_COL_STATISTICS
- MY_SUBPART_KEY_COLUMNS
- MY_TAB_PARTITIONS
- MY_TAB_SUBPARTITIONS
- GS_STATIO_ALL_PARTITIONS
- GS_STAT_XACT_ALL_PARTITIONS
- GS_STAT_ALL_PARTITIONS
- OLTP Table Compression
- Communications
- Segment-Page Storage
- SPM
- Auditing
-
User and Permission Management
- ADM_COL_PRIVS
- ADM_ROLE_PRIVS
- ADM_ROLES
- ADM_SYS_PRIVS
- ADM_TAB_PRIVS
- ADM_USERS
- DB_COL_PRIVS
- DB_DIRECTORIES
- DB_TAB_PRIVS
- DB_USERS
- GS_DB_PRIVILEGES
- GS_LABELS
- MY_COL_PRIVS
- MY_ROLE_PRIVS
- MY_SYS_PRIVS
- PG_RLSPOLICIES
- PG_ROLES
- PG_SECLABELS
- PG_SHADOW
- PG_USER
- PG_USER_MAPPINGS
- ROLE_ROLE_PRIVS
- ROLE_SYS_PRIVS
- ROLE_TAB_PRIVS
- Dynamic Data Masking
- Transparent Encryption
- DATABASE LINK
- Materialized Views
-
Other System Views
- ADM_ARGUMENTS
- ADM_COL_COMMENTS
- ADM_COLL_TYPES
- ADM_CONS_COLUMNS
- ADM_CONSTRAINTS
- ADM_DATA_FILES
- ADM_DEPENDENCIES
- ADM_DIRECTORIES
- ADM_HIST_SNAPSHOT
- ADM_HIST_SQL_PLAN
- ADM_HIST_SQLSTAT
- ADM_HIST_SQLTEXT
- ADM_IND_COLUMNS
- ADM_IND_EXPRESSIONS
- ADM_INDEXES
- ADM_OBJECTS
- ADM_PROCEDURES
- ADM_RECYCLEBIN
- ADM_SCHEDULER_JOB_ARGS
- ADM_SCHEDULER_JOBS
- ADM_SCHEDULER_PROGRAM_ARGS
- ADM_SCHEDULER_PROGRAMS
- ADM_SCHEDULER_RUNNING_JOBS
- ADM_SEGMENTS
- ADM_SEQUENCES
- ADM_SOURCE
- ADM_SYNONYMS
- ADM_TAB_COL_STATISTICS
- ADM_TAB_COLS
- ADM_TAB_COLUMNS
- ADM_TAB_COMMENTS
- ADM_TAB_HISTOGRAMS
- ADM_TAB_STATISTICS
- ADM_TAB_STATS_HISTORY
- ADM_TABLES
- ADM_TABLESPACES
- ADM_TRIGGERS
- ADM_TYPE_ATTRS
- ADM_TYPES
- ADM_VIEWS
- DB_ARGUMENTS
- DB_ALL_TABLES
- DB_COL_COMMENTS
- DB_COLL_TYPES
- DB_CONS_COLUMNS
- DB_CONSTRAINTS
- DB_DEPENDENCIES
- DB_ERRORS
- DB_IND_COLUMNS
- DB_IND_EXPRESSIONS
- DB_INDEXES
- DB_OBJECTS
- DB_PROCEDURES
- DB_SCHEDULER_JOB_ARGS
- DB_SCHEDULER_PROGRAM_ARGS
- DB_SEQUENCES
- DB_SOURCE
- DB_SYNONYMS
- DB_TAB_COL_STATISTICS
- DB_TAB_COLUMNS
- DB_TAB_COMMENTS
- DB_TAB_HISTOGRAMS
- DB_TAB_MODIFICATIONS
- DB_TAB_STATS_HISTORY
- DB_TABLES
- DB_TRIGGERS
- DB_TYPES
- DB_VIEWS
- DICT
- DICTIONARY
- DUAL
- DV_SESSIONS
- DV_SESSION_LONGOPS
- GS_ALL_CONTROL_GROUP_INFO
- GS_ALL_PREPARED_STATEMENTS
- GS_COMM_PROXY_THREAD_STATUS
- GS_FILE_STAT
- GS_GET_CONTROL_GROUP_INFO
- GS_GLC_MEMORY_DETAIL
- GS_GLOBAL_ARCHIVE_STATUS
- GS_GSC_MEMORY_DETAIL
- GS_INSTANCE_TIME
- GS_LSC_MEMORY_DETAIL
- GS_MY_PLAN_TRACE
- GS_OS_RUN_INFO
- GS_REDO_STAT
- GS_SESSION_ALL_SETTINGS
- GS_SESSION_MEMORY
- GS_SESSION_MEMORY_CONTEXT
- GS_SESSION_MEMORY_DETAIL
- GS_SESSION_STAT
- GS_SESSION_TIME
- GS_SHARED_MEMORY_DETAIL
- GS_SQL_COUNT
- GS_THREAD_MEMORY_CONTEXT
- GS_TOTAL_MEMORY_DETAIL
- GS_TOTAL_NODEGROUP_MEMORY_DETAIL
- GS_WORKLOAD_RULE_STAT
- GV_INSTANCE
- GV_SESSION
- MPP_TABLES
- MY_AUDIT_TRAIL
- MY_COL_COMMENTS
- MY_COLL_TYPES
- MY_CONS_COLUMNS
- MY_CONSTRAINTS
- MY_DEPENDENCIES
- MY_ERRORS
- MY_IND_COLUMNS
- MY_IND_EXPRESSIONS
- MY_INDEXES
- MY_JOBS
- MY_OBJECTS
- MY_PROCEDURES
- MY_RECYCLEBIN
- MY_SCHEDULER_JOB_ARGS
- MY_SCHEDULER_JOBS
- MY_SCHEDULER_PROGRAM_ARGS
- MY_SEQUENCES
- MY_SOURCE
- MY_SYNONYMS
- MY_TAB_COL_STATISTICS
- MY_TAB_COLUMNS
- MY_TAB_COMMENTS
- MY_TAB_HISTOGRAMS
- MY_TAB_MODIFICATIONS
- MY_TAB_STATS_HISTORY
- MY_TAB_STATISTICS
- MY_TABLES
- MY_TABLESPACES
- MY_TRIGGERS
- MY_TYPE_ATTRS
- MY_TYPES
- MY_VIEWS
- NLS_DATABASE_PARAMETERS
- NLS_INSTANCE_PARAMETERS
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_AVAILABLE_EXTENSIONS
- PG_CONTROL_GROUP_CONFIG
- PG_CURSORS
- PG_EXT_STATS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_GTT_RELSTATS
- PG_GTT_STATS
- PG_GTT_ATTACHED_PIDS
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_REPLICATION_ORIGIN_STATUS
- PG_REPLICATION_SLOTS
- PG_RULES
- PG_RUNNING_XACTS
- PG_SETTINGS
- PG_STATS
- PG_STAT_ACTIVITY
- PG_STAT_ACTIVITY_NG
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_REPLICATION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_TABLES
- PG_THREAD_WAIT_STATUS
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_VARIABLE_INFO
- PG_VIEWS
- PGXC_PREPARED_XACTS
- PGXC_THREAD_WAIT_STATUS
- PLAN_TABLE
- SYS_DUMMY
- V_INSTANCE
- V_MYSTAT
- V_SESSION
- V$GLOBAL_TRANSACTION
- V$LOCK
- V$NLS_PARAMETERS
- V$OPEN_CURSOR
- V$SESSION_WAIT
- V$SYSSTAT
- V$SYSTEM_EVENT
- V$VERSION
-
Partitioned Table
- Discarded
-
Schemas
- Information Schema
-
DBE_PERF Schema
- OS
- Instance
- Memory
- File
-
Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
- GLOBAL_STAT_XACT_ALL_TABLES
- STAT_XACT_SYS_TABLES
- SUMMARY_STAT_XACT_SYS_TABLES
- GLOBAL_STAT_XACT_SYS_TABLES
- STAT_XACT_USER_TABLES
- SUMMARY_STAT_XACT_USER_TABLES
- GLOBAL_STAT_XACT_USER_TABLES
- STAT_XACT_USER_FUNCTIONS
- SUMMARY_STAT_XACT_USER_FUNCTIONS
- GLOBAL_STAT_XACT_USER_FUNCTIONS
- STAT_BAD_BLOCK
- SUMMARY_STAT_BAD_BLOCK
- GLOBAL_STAT_BAD_BLOCK
- STAT_USER_FUNCTIONS
- SUMMARY_STAT_USER_FUNCTIONS
- GLOBAL_STAT_USER_FUNCTIONS
- Workload
-
Session/Thread
- SESSION_STAT
- GLOBAL_SESSION_STAT
- SESSION_TIME
- GLOBAL_SESSION_TIME
- SESSION_MEMORY
- GLOBAL_SESSION_MEMORY
- SESSION_MEMORY_DETAIL
- GLOBAL_SESSION_MEMORY_DETAIL
- SESSION_STAT_ACTIVITY
- GLOBAL_SESSION_STAT_ACTIVITY
- THREAD_WAIT_STATUS
- GLOBAL_THREAD_WAIT_STATUS
- LOCAL_THREADPOOL_STATUS
- GLOBAL_THREADPOOL_STATUS
- LOCAL_ACTIVE_SESSION
- Transaction
- Query
-
Cache/IO
- STATIO_USER_TABLES
- SUMMARY_STATIO_USER_TABLES
- GLOBAL_STATIO_USER_TABLES
- STATIO_USER_INDEXES
- SUMMARY_STATIO_USER_INDEXES
- GLOBAL_STATIO_USER_INDEXES
- STATIO_USER_SEQUENCES
- SUMMARY_STATIO_USER_SEQUENCES
- GLOBAL_STATIO_USER_SEQUENCES
- STATIO_SYS_TABLES
- SUMMARY_STATIO_SYS_TABLES
- GLOBAL_STATIO_SYS_TABLES
- STATIO_SYS_INDEXES
- SUMMARY_STATIO_SYS_INDEXES
- GLOBAL_STATIO_SYS_INDEXES
- STATIO_SYS_SEQUENCES
- SUMMARY_STATIO_SYS_SEQUENCES
- GLOBAL_STATIO_SYS_SEQUENCES
- STATIO_ALL_TABLES
- SUMMARY_STATIO_ALL_TABLES
- GLOBAL_STATIO_ALL_TABLES
- STATIO_ALL_INDEXES
- SUMMARY_STATIO_ALL_INDEXES
- GLOBAL_STATIO_ALL_INDEXES
- STATIO_ALL_SEQUENCES
- SUMMARY_STATIO_ALL_SEQUENCES
- GLOBAL_STATIO_ALL_SEQUENCES
-
Utility
- REPLICATION_STAT
- GLOBAL_REPLICATION_STAT
- REPLICATION_SLOTS
- GLOBAL_REPLICATION_SLOTS
- BGWRITER_STAT
- GLOBAL_BGWRITER_STAT
- GLOBAL_CKPT_STATUS
- GLOBAL_DOUBLE_WRITE_STATUS
- GLOBAL_PAGEWRITER_STATUS
- GLOBAL_RECORD_RESET_TIME
- GLOBAL_REDO_STATUS
- GLOBAL_RECOVERY_STATUS
- CLASS_VITAL_INFO
- USER_LOGIN
- SUMMARY_USER_LOGIN
- GLOBAL_SINGLE_FLUSH_DW_STATUS
- GLOBAL_CANDIDATE_STATUS
- PARALLEL_DECODE_STATUS
- GLOBAL_PARALLEL_DECODE_STATUS
- PARALLEL_DECODE_THREAD_INFO
- GLOBAL_PARALLEL_DECODE_THREAD_INFO
- GLOBAL_ADIO_COMPLETER_STATUS
- GLOBAL_AIO_SLOT_USAGE_STATUS
- Lock
- Wait Events
- Configuration
- Operator
- Workload Manager
- Global Plancache
- RTO & RPO
- AI Watchdog
- WDR Snapshot Schema
-
DBE_PLDEBUGGER Schema
- DBE_PLDEBUGGER.turn_on
- DBE_PLDEBUGGER.turn_off
- DBE_PLDEBUGGER.local_debug_server_info
- DBE_PLDEBUGGER.attach
- DBE_PLDEBUGGER.info_locals
- DBE_PLDEBUGGER.next
- DBE_PLDEBUGGER.continue
- DBE_PLDEBUGGER.abort
- DBE_PLDEBUGGER.print_var
- DBE_PLDEBUGGER.info_code
- DBE_PLDEBUGGER.step
- DBE_PLDEBUGGER.add_breakpoint
- DBE_PLDEBUGGER.delete_breakpoint
- DBE_PLDEBUGGER.info_breakpoints
- DBE_PLDEBUGGER.backtrace
- DBE_PLDEBUGGER.enable_breakpoint
- DBE_PLDEBUGGER.disable_breakpoint
- DBE_PLDEBUGGER.finish
- DBE_PLDEBUGGER.set_var
- DBE_PLDEBUGGER.error_backtrace
- DBE_PLDEBUGGER.error_end
- DBE_PLDEBUGGER.error_info_locals
- DB4AI Schema
- DBE_PLDEVELOPER
- DBE_SQL_UTIL Schema
-
Configuring GUC Parameters
- Viewing Parameters
- Setting Parameters
-
GUC Parameters
- GUC Parameter Usage
- File Location
- Connection and Authentication
- Resource Consumption
- Data Import and Export
- Write Ahead Log
- HA Replication
- Query Planning
- SPM
- Error Reporting and Logging
- Alarm Detection
- Statistics During the Database Running
- Autovacuum
- Default Settings of Client Connection
- Lock Management
- Version and Platform Compatibility
- Fault Tolerance
- Connection Pool Parameters
- Transaction
- Replication Parameters of Two Database Instances
- Developer Options
- Auditing
- CM Parameters
- Upgrade Parameters
- Miscellaneous Parameters
- Wait Events
- Query
- System Performance Snapshot
- Security Configuration
- Global Temporary Table
- HyperLogLog
- User-defined Functions
- Scheduled Task
- Thread Pool
- Backup and Restoration
- Undo
- DCF Parameters Settings
- Flashback
- Rollback Parameters
- AI Features
- Global SysCache Parameters
- Restoring Data on the Standby Node
- Delimiter
- Global PL/SQL Cache Parameters
- Ledger Database
- Creating an Index Online
- Data Lifecycle Management: OLTP Table Compression
- Vector Database Parameters
- Enhanced TOAST
- Reserved Parameters
-
FAQ
- What is the maximum number of columns in a single GaussDB table?
- How do I query the partition and index information of a partitioned table?
- What is OID?
- What is UDF?
- What wildcards are supported in GaussDB? How do I use them?
- Is there a limit on the length of a database object name?
- How do I view the creation time of a table?
- How do I create indexes in parallel?
- How do I create an auto-increment column?
- Can I query the GaussDB memory usage through SQL statements?
- What are the differences between LIMIT 2, LIMIT 2,3 and LIMIT 2 OFFSET 3?
- How do I create a column whose default value is the current time?
- How do I determine whether a column is null?
- How do I obtain the username for connecting to a database?
- How do I query the time difference between two time points?
- What are the types of SQL languages?
- What is the function of a trigger?
- What are the four characteristics of correctly executing database transactions?
- What are the differences between the DROP, TRUNCATE, and DELETE methods in GaussDB?
- How many bytes does a Chinese character occupy in GaussDB?
-
Developer Guide(Distributed_3.x)
- Database System Overview
- Database Security
- Database Quick Start
- Development and Design Proposal
-
Application Development Guide
- Development Specifications
- Obtaining the Driver Package
-
Development Based on JDBC
- JDBC Package, Driver Class, and Environment Class
- Development Process
- Loading a Driver
- Connecting to a Database
- Connecting to a Database (Using SSL)
- Connecting to a Database (Using UDS)
- Running SQL Statements
- Processing Data in a Result Set
- Closing a Connection
- Log Management
- Examples: Common Operations
- Example: Retrying SQL Queries for Applications
- Example: Logical Replication Code
- Example: Parameters for Connecting to the Database in Different Scenarios
-
JDBC Interface Reference
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- PGReplicationConnection
- PGReplicationStream
- ChainedStreamBuilder
- ChainedCommonStreamBuilder
- Common JDBC Parameters
- FAQs
- Mapping for JDBC Data Types
- Development Based on ODBC
- Development Based on libpq
- Psycopg-based Development
-
ECPG-based Development
- Development Process
- ecpg Components
- ecpg Preprocessing and Compiling
- Managing Database Connections
- Running SQL Commands
- Querying the Result Set
- Closing a Database Connection
- Host Variables
- Executing Dynamic SQL Statements
- Error Handling
- Preprocessor Directives
- Using Library Functions
- SQL Descriptor Area
- Examples
- ecpg and Pro*C Compatibility Comparison
- ECPG API Reference
- Development Based on the Go Driver
- Debugging
-
SQL Optimization
- Query Execution Process
- Introduction to the SQL Execution Plan
- Optimization Process
- Updating Statistics
- Reviewing and Modifying a Table Definition
- Typical SQL Optimization Methods
- Experience in Rewriting SQL Statements
- Configuring Key Parameters for SQL Tuning
-
Hint-based Tuning
- Plan Hint Optimization
- Hint Specifying the Query Block Where the Hint Is Located
- Hint Specifying the Query Block and Schema of a Table
- Join Order Hints
- Join Operation Hints
- Rows Hints
- Stream Operation Hints
- Scan Hints
- Sublink Name Hints
- Skew Hints
- Parameterized Path Hint
- Hint Errors, Conflicts, and Other Warnings
- GUC Parameter Hints
- Hints for Selecting the Custom Plan or Generic Plan
- Hints Specifying Not to Expand Subqueries
- Hints Specifying Not to Use Global Plan Cache
- Hint of Parameterized Paths at the Same Level
- Hint for Setting Slow SQL Control Rules
- Bitmap Scan Hints
- Hint for Inner Table Materialization During Join
- AGG Hint
- Checking the Implicit Conversion Performance
- Tuning with SQL PATCH
-
Optimization Cases
- Case: Selecting an Appropriate Distribution Key
- Case: Creating an Appropriate Index
- Case: Adjusting Distribution Keys
- Case: Adjusting the GUC Parameter best_agg_plan
- Case: Rewriting SQL and Deleting Subqueries (1)
- Case: Rewriting SQL Statements to Eliminate Pruning Interference
- Case: Rewriting SQL Statements and Deleting in-clause
- Case: Modifying the GUC Parameter rewrite_rule
- Using DN Gather to Reduce Stream Nodes in the Plan
-
SQL Reference
- SQL
- Keywords
- Data Type
- Constant and Macro
-
Functions and Operators
- Logical Operators
- Comparison Operators
- Character Processing Functions and Operators
- Binary String Functions and Operators
- Bit String Functions and Operators
- Pattern Matching Operators
- Arithmetic Functions and Operators
- Date and Time Processing Functions and Operators
- Type Conversion Functions
- Geometric Functions and Operators
- Network Address Functions and Operators
- Text Search Functions and Operators
- JSON/JSONB Functions and Operators
- HLL Functions and Operators
- SEQUENCE Functions
- Array Functions and Operators
- Range Functions and Operators
- Aggregate Functions
- Window Functions
- Security Functions
- Encrypted Functions and Operators
- Set Returning Functions
- Conditional Expression Functions
- System Information Functions
-
System Administration Functions
- Configuration Settings Functions
- Universal File Access Functions
- Server Signal Functions
- Backup and Restoration Control Functions
- Dual-Cluster DR Control Functions
- Dual-Cluster DR Query Functions
- Snapshot Synchronization Functions
- Database Object Functions
- Advisory Lock Functions
- Logical Replication Functions
- Undo System Functions
- Other Functions
- SQL Statement Concurrency Control Function
- Statistics Information Functions
- Trigger Functions
- Hash Function
- Prompt Message Function
- Fault Injection System Function
- Redistribution Parameters
- Distribution Key Recommendation Functions
- Other System Functions
- Internal Functions
- AI Feature Functions
- Dynamic Data Masking Functions
- Hotkey Feature Functions
- Global SysCache Functions
- Data Damage Detection and Repair Functions
- Functions of the XML Type
- Functions of the XMLType Type
- Obsolete Functions
- Expressions
- Pseudocolumn
- Type Conversion
- System Operation
- Controlling Transactions
- DDL Syntax Overview
- DML Syntax Overview
- DCL Syntax Overview
-
SQL Syntax
- SQL Syntax
- ABORT
- ALTER AUDIT POLICY
- ALTER COLUMN ENCRYPTION KEY
- ALTER COORDINATOR
- ALTER DATABASE
- ALTER DATABASE LINK
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER FOREIGN DATA WRAPPER
- ALTER FUNCTION
- ALTER GLOBAL CONFIGURATION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER NODE
- ALTER NODE GROUP
- ALTER RESOURCE LABEL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLESPACE
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER VIEW
- ANALYZE | ANALYSE
- BEGIN
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- COPY
- CREATE AUDIT POLICY
- CREATE BARRIER
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE CONVERSION
- CREATE DATABASE
- CREATE DATABASE LINK
- CREATE DIRECTORY
- CREATE FOREIGN DATA WRAPPER
- CREATE FUNCTION
- CREATE GLOBAL INDEX
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE NODE
- CREATE NODE GROUP
- CREATE PROCEDURE
- CREATE RESOURCE LABEL
- CREATE ROLE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE SCHEMA
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLESPACE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE VIEW
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
- DEALLOCATE
- DECLARE
- DELETE
- DO
- DROP AUDIT POLICY
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATABASE LINK
- DROP DIRECTORY
- DROP FOREIGN DATA WRAPPER
- DROP FUNCTION
- DROP GLOBAL CONFIGURATION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP NODE
- DROP NODE GROUP
- DROP OWNED
- DROP PROCEDURE
- DROP RESOURCE LABEL
- DROP ROLE
- DROP ROW LEVEL SECURITY POLICY
- DROP SCHEMA
- DROP SEQUENCE
- DROP SERVER
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP VIEW
- DROP WEAK PASSWORD DICTIONARY
- EXECUTE
- EXECUTE DIRECT
- EXPDP DATABASE
- EXPDP TABLE
- EXPLAIN
- EXPLAIN PLAN
- FETCH
- GRANT
- IMPDP DATABASE CREATE
- IMPDP RECOVER
- INSERT
- IMPDP TABLE
- IMPDP TABLE PREPARE
- LOCK
- MOVE
- MERGE INTO
- PREDICT BY
- PREPARE
- PREPARE TRANSACTION
- PURGE
- REASSIGN OWNED
- REINDEX
- REFRESH INCREMENTAL MATERIALIZED VIEW
- REFRESH MATERIALIZED VIEW
- RELEASE SAVEPOINT
- RESET
- REVOKE
- ROLLBACK
- ROLLBACK PREPARED
- ROLLBACK TO SAVEPOINT
- SAVEPOINT
- SELECT
- SELECT INTO
- SET
- SET CONSTRAINTS
- SET ROLE
- SET SESSION AUTHORIZATION
- SET TRANSACTION
- SHOW
- SHUTDOWN
- START TRANSACTION
- TIMECAPSULE TABLE
- TRUNCATE
- UPDATE
- VACUUM
- VALUES
- Appendix
- Best Practices
- User-defined Functions
- Stored Procedures
- Autonomous Transaction
-
System Catalogs and System Views
- Overview of System Catalogs and System Views
-
System Catalogs
- GS_AUDITING_POLICY
- GS_AUDITING_POLICY_ACCESS
- GS_AUDITING_POLICY_FILTERS
- GS_AUDITING_POLICY_PRIVILEGES
- GS_ASP
- GS_CLIENT_GLOBAL_KEYS
- GS_CLIENT_GLOBAL_KEYS_ARGS
- GS_COLUMN_KEYS
- GS_COLUMN_KEYS_ARGS
- GS_DATABASE_LINK
- GS_DB_PRIVILEGE
- GS_DEPENDENCIES
- GS_DEPENDENCIES_OBJ
- GS_ENCRYPTED_COLUMNS
- GS_ENCRYPTED_PROC
- GS_GLOBAL_CONFIG
- GS_JOB_ATTRIBUTE
- GS_JOB_ARGUMENT
- GS_MASKING_POLICY
- GS_MASKING_POLICY_ACTIONS
- GS_MASKING_POLICY_FILTERS
- GS_MATVIEW
- GS_MATVIEW_DEPENDENCY
- GS_MODEL_WAREHOUSE
- GS_OPT_MODEL
- GS_PLAN_TRACE
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_SQL_PATCH
- GS_TXN_SNAPSHOT
- GS_UID
- GS_WORKLOAD_RULE
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_APP_WORKLOADGROUP_MAPPING
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_AUTHID
- PG_AUTH_HISTORY
- PG_AUTH_MEMBERS
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DB_ROLE_SETTING
- PG_DEFAULT_ACL
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EXTENSION
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_HASHBUCKET
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PARTITION
- PG_PLTEMPLATE
- PG_PROC
- PG_RANGE
- PG_REPLICATION_ORIGIN
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_RLSPOLICY
- PG_SECLABEL
- PG_SET
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_SHSECLABEL
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PG_USER_MAPPING
- PG_USER_STATUS
- PGXC_CLASS
- PGXC_GROUP
- PGXC_NODE
- PGXC_REDISTB
- PGXC_SLICE
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- STREAMING_STREAM
- STREAMING_CONT_QUERY
-
System Views
- ADM_ARGUMENTS
- ADM_AUDIT_OBJECT
- ADM_AUDIT_SESSION
- ADM_AUDIT_STATEMENT
- ADM_AUDIT_TRAIL
- ADM_COL_COMMENTS
- ADM_COL_PRIVS
- ADM_COLL_TYPES
- ADM_CONS_COLUMNS
- ADM_CONSTRAINTS
- ADM_DATA_FILES
- ADM_DEPENDENCIES
- ADM_DIRECTORIES
- ADM_HIST_SNAPSHOT
- ADM_HIST_SQL_PLAN
- ADM_HIST_SQLSTAT
- ADM_HIST_SQLTEXT
- ADM_IND_COLUMNS
- ADM_IND_EXPRESSIONS
- ADM_IND_PARTITIONS
- ADM_IND_SUBPARTITIONS
- ADM_INDEXES
- ADM_OBJECTS
- ADM_PART_COL_STATISTICS
- ADM_PART_INDEXES
- ADM_PART_TABLES
- ADM_PROCEDURES
- ADM_ROLE_PRIVS
- ADM_ROLES
- ADM_SCHEDULER_JOB_ARGS
- ADM_SCHEDULER_JOBS
- ADM_SCHEDULER_PROGRAM_ARGS
- ADM_SCHEDULER_PROGRAMS
- ADM_SCHEDULER_RUNNING_JOBS
- ADM_SEGMENTS
- ADM_SEQUENCES
- ADM_SOURCE
- ADM_SUBPART_KEY_COLUMNS
- ADM_SYNONYMS
- ADM_SYS_PRIVS
- ADM_TAB_COLS
- ADM_TAB_COL_STATISTICS
- ADM_TAB_COLUMNS
- ADM_TAB_COMMENTS
- ADM_TAB_HISTOGRAMS
- ADM_TAB_PARTITIONS
- ADM_TAB_PRIVS
- ADM_TAB_STATISTICS
- ADM_TAB_STATS_HISTORY
- ADM_TABLES
- ADM_TABLESPACES
- ADM_TRIGGERS
- ADM_TYPES
- ADM_TYPE_ATTRS
- ADM_USERS
- ADM_VIEWS
- COMM_CLIENT_INFO
- DB_ALL_TABLES
- DB_ARGUMENTS
- DB_COL_COMMENTS
- DB_COL_PRIVS
- DB_COLL_TYPES
- DB_CONSTRAINTS
- DB_CONS_COLUMNS
- DB_DEPENDENCIES
- DB_IND_COLUMNS
- DB_IND_EXPRESSIONS
- DB_IND_PARTITIONS
- DB_IND_SUBPARTITIONS
- DB_INDEXES
- DB_OBJECTS
- DB_PART_COL_STATISTICS
- DB_PART_KEY_COLUMNS
- DB_PART_TABLES
- DB_PROCEDURES
- DB_SCHEDULER_JOB_ARGS
- DB_SCHEDULER_PROGRAM_ARGS
- DB_SEQUENCES
- DB_SOURCE
- DB_SUBPART_KEY_COLUMNS
- DB_SYNONYMS
- DB_TAB_COL_STATISTICS
- DB_TAB_COLUMNS
- DB_TAB_COMMENTS
- DB_TAB_HISTOGRAMS
- DB_TAB_PARTITIONS
- DB_TAB_STATS_HISTORY
- DB_TAB_SUBPARTITIONS
- DB_TABLES
- DB_TRIGGERS
- DB_TYPES
- DB_USERS
- DB_VIEWS
- DICT
- DICTIONARY
- DV_SESSIONS
- DV_SESSION_LONGOPS
- GET_GLOBAL_PREPARED_XACTS
- GLOBAL_BAD_BLOCK_INFO
- GLOBAL_CLEAR_BAD_BLOCK_INFO
- GLOBAL_COMM_CLIENT_INFO
- GLOBAL_SQL_PATCH
- GLOBAL_STAT_HOTKEYS_INFO
- GLOBAL_WAL_SENDER_STATUS
- GS_ALL_CONTROL_GROUP_INFO
- GS_ALL_PREPARED_STATEMENTS
- GS_AUDITING
- GS_AUDITING_ACCESS
- GS_AUDITING_PRIVILEGE
- GS_CLUSTER_RESOURCE_INFO
- GS_COMM_LISTEN_ADDRESS_EXT_INFO
- GS_DB_LINKS
- GS_DB_PRIVILEGES
- GS_GET_CONTROL_GROUP_INFO
- GS_GET_LISTEN_ADDRESS_EXT_INFO
- GS_GLOBAL_ARCHIVE_STATUS
- GS_GSC_MEMORY_DETAIL
- GS_LABELS
- GS_LSC_MEMORY_DETAIL
- GS_MASKING
- GS_MATVIEWS
- GS_MY_PLAN_TRACE
- GS_SESSION_ALL_SETTINGS
- GS_SQL_COUNT
- GS_STAT_ALL_PARTITIONS
- GS_STAT_XACT_ALL_PARTITIONS
- GS_STATIO_ALL_PARTITIONS
- GS_WORKLOAD_RULE_STAT
- GV_INSTANCE
- GV_SESSION
- MPP_TABLES
- MY_COL_COMMENTS
- MY_COL_PRIVS
- MY_COLL_TYPES
- MY_CONS_COLUMNS
- MY_CONSTRAINTS
- MY_DEPENDENCIES
- MY_IND_COLUMNS
- MY_IND_EXPRESSIONS
- MY_IND_PARTITIONS
- MY_IND_SUBPARTITIONS
- MY_INDEXES
- MY_JOBS
- MY_OBJECTS
- MY_PART_COL_STATISTICS
- MY_PART_INDEXES
- MY_PART_KEY_COLUMNS
- MY_PART_TABLES
- MY_PROCEDURES
- MY_ROLE_PRIVS
- MY_SCHEDULER_JOB_ARGS
- MY_SCHEDULER_PROGRAM_ARGS
- MY_SEQUENCES
- MY_SOURCE
- MY_SUBPART_KEY_COLUMNS
- MY_SYNONYMS
- MY_SYS_PRIVS
- MY_TAB_COL_STATISTICS
- MY_TAB_COLUMNS
- MY_TAB_COMMENTS
- MY_TAB_HISTOGRAMS
- MY_TAB_PARTITIONS
- MY_TAB_STATISTICS
- MY_TAB_STATS_HISTORY
- MY_TABLES
- MY_TABLESPACES
- MY_TRIGGERS
- MY_TYPE_ATTRS
- MY_TYPES
- MY_VIEWS
- NLS_DATABASE_PARAMETERS
- NLS_INSTANCE_PARAMETERS
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_AVAILABLE_EXTENSIONS
- PG_COMM_DELAY
- PG_COMM_RECV_STREAM
- PG_COMM_SEND_STREAM
- PG_COMM_STATUS
- PG_CONTROL_GROUP_CONFIG
- PG_CURSORS
- PG_EXT_STATS
- PG_GET_INVALID_BACKENDS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_POOLER_STATUS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_REPLICATION_SLOTS
- PG_RLSPOLICIES
- PG_ROLES
- PG_RULES
- PG_RUNNING_XACTS
- PG_SECLABELS
- PG_SETTINGS
- PG_SHADOW
- PG_SHARED_MEMORY_DETAIL
- PG_STAT_ACTIVITY
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_REPLICATION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATS
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_THREAD_WAIT_STATUS
- PG_TABLES
- PG_TDE_INFO
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_USER
- PG_USER_MAPPINGS
- PG_VARIABLE_INFO
- PG_VIEWS
- PGXC_COMM_DELAY
- PGXC_COMM_RECV_STREAM
- PGXC_COMM_SEND_STREAM
- PGXC_COMM_STATUS
- PGXC_GET_STAT_ALL_TABLES
- PGXC_GET_TABLE_SKEWNESS
- PGXC_NODE_ENV
- PGXC_OS_THREADS
- PGXC_PREPARED_XACTS
- PGXC_RUNNING_XACTS
- PGXC_SQL_COUNT
- PGXC_STAT_ACTIVITY
- PGXC_STAT_BAD_BLOCK
- PGXC_THREAD_WAIT_STATUS
- PGXC_TOTAL_MEMORY_DETAIL
- PGXC_VARIABLE_INFO
- PLAN_TABLE
- PV_FILE_STAT
- PV_INSTANCE_TIME
- PV_OS_RUN_INFO
- PV_REDO_STAT
- PV_SESSION_MEMORY
- PV_SESSION_MEMORY_CONTEXT
- PV_SESSION_MEMORY_DETAIL
- PV_SESSION_STAT
- PV_SESSION_TIME
- PV_THREAD_MEMORY_CONTEXT
- PV_TOTAL_MEMORY_DETAIL
- ROLE_ROLE_PRIVS
- ROLE_SYS_PRIVS
- ROLE_TAB_PRIVS
- SYS_DUMMY
- V_INSTANCE
- V_MYSTAT
- V_SESSION
- V$NLS_PARAMETERS
- V$SESSION_WAIT
- V$SYSSTAT
- V$SYSTEM_EVENT
- V$VERSION
-
Schemas
- Information Schema
-
DBE_PERF Schema
- OS
- Instance
- Memory
- File
-
Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
- GLOBAL_STAT_XACT_ALL_TABLES
- STAT_XACT_SYS_TABLES
- SUMMARY_STAT_XACT_SYS_TABLES
- GLOBAL_STAT_XACT_SYS_TABLES
- STAT_XACT_USER_TABLES
- SUMMARY_STAT_XACT_USER_TABLES
- GLOBAL_STAT_XACT_USER_TABLES
- STAT_XACT_USER_FUNCTIONS
- SUMMARY_STAT_XACT_USER_FUNCTIONS
- GLOBAL_STAT_XACT_USER_FUNCTIONS
- STAT_BAD_BLOCK
- SUMMARY_STAT_BAD_BLOCK
- GLOBAL_STAT_BAD_BLOCK
- STAT_USER_FUNCTIONS
- SUMMARY_STAT_USER_FUNCTIONS
- GLOBAL_STAT_USER_FUNCTIONS
- Workload
-
Session and Thread
- SESSION_STAT
- GLOBAL_SESSION_STAT
- SESSION_TIME
- GLOBAL_SESSION_TIME
- SESSION_MEMORY
- GLOBAL_SESSION_MEMORY
- SESSION_MEMORY_DETAIL
- GLOBAL_SESSION_MEMORY_DETAIL
- SESSION_STAT_ACTIVITY
- GLOBAL_SESSION_STAT_ACTIVITY
- THREAD_WAIT_STATUS
- GLOBAL_THREAD_WAIT_STATUS
- LOCAL_THREADPOOL_STATUS
- GLOBAL_THREADPOOL_STATUS
- SESSION_CPU_RUNTIME
- SESSION_MEMORY_RUNTIME
- LOCAL_ACTIVE_SESSION
- GLOBAL_ACTIVE_SESSION
- Transaction
- Query
-
Cache and I/O
- STATIO_USER_TABLES
- SUMMARY_STATIO_USER_TABLES
- GLOBAL_STATIO_USER_TABLES
- STATIO_USER_INDEXES
- SUMMARY_STATIO_USER_INDEXES
- GLOBAL_STATIO_USER_INDEXES
- STATIO_USER_SEQUENCES
- SUMMARY_STATIO_USER_SEQUENCES
- GLOBAL_STATIO_USER_SEQUENCES
- STATIO_SYS_TABLES
- SUMMARY_STATIO_SYS_TABLES
- GLOBAL_STATIO_SYS_TABLES
- STATIO_SYS_INDEXES
- SUMMARY_STATIO_SYS_INDEXES
- GLOBAL_STATIO_SYS_INDEXES
- STATIO_SYS_SEQUENCES
- SUMMARY_STATIO_SYS_SEQUENCES
- GLOBAL_STATIO_SYS_SEQUENCES
- STATIO_ALL_TABLES
- SUMMARY_STATIO_ALL_TABLES
- GLOBAL_STATIO_ALL_TABLES
- STATIO_ALL_INDEXES
- SUMMARY_STATIO_ALL_INDEXES
- GLOBAL_STATIO_ALL_INDEXES
- STATIO_ALL_SEQUENCES
- SUMMARY_STATIO_ALL_SEQUENCES
- GLOBAL_STATIO_ALL_SEQUENCES
- Communication Library
-
Utility
- REPLICATION_STAT
- GLOBAL_REPLICATION_STAT
- REPLICATION_SLOTS
- GLOBAL_REPLICATION_SLOTS
- PARALLEL_DECODE_STATUS
- GLOBAL_PARALLEL_DECODE_STATUS
- PARALLEL_DECODE_THREAD_INFO
- GLOBAL_PARALLEL_DECODE_THREAD_INFO
- BGWRITER_STAT
- GLOBAL_BGWRITER_STAT
- POOLER_STATUS
- GLOBAL_COMM_CHECK_CONNECTION_STATUS
- GLOBAL_CKPT_STATUS
- GLOBAL_DOUBLE_WRITE_STATUS
- GLOBAL_PAGEWRITER_STATUS
- GLOBAL_POOLER_STATUS
- GLOBAL_RECORD_RESET_TIME
- GLOBAL_REDO_STATUS
- GLOBAL_RECOVERY_STATUS
- CLASS_VITAL_INFO
- USER_LOGIN
- SUMMARY_USER_LOGIN
- GLOBAL_GET_BGWRITER_STATUS
- GLOBAL_SINGLE_FLUSH_DW_STATUS
- GLOBAL_CANDIDATE_STATUS
- Lock
- Wait Event
- Configuration
- Operator
- Workload Manager
- Global Plan Cache
- RTO & RPO
- AI Watchdog
- Discarded
- WDR Snapshot Schema
-
DBE_SQL_UTIL Schema
- DBE_SQL_UTIL.create_hint_sql_patch
- DBE_SQL_UTIL.create_abort_sql_patch
- DBE_SQL_UTIL.drop_sql_patch
- DBE_SQL_UTIL.enable_sql_patch
- DBE_SQL_UTIL.disable_sql_patch
- DBE_SQL_UTIL.show_sql_patch
- DBE_SQL_UTIL.create_hint_sql_patch
- DBE_SQL_UTIL.create_abort_sql_patch
- DBE_SQL_UTIL.create_remote_hint_sql_patch
- DBE_SQL_UTIL.create_remote_abort_sql_patch
- DBE_SQL_UTIL.drop_remote_sql_patch
- DBE_SQL_UTIL.enable_remote_sql_patch
- DBE_SQL_UTIL.disable_remote_sql_patch
-
Configuring Running Parameters
- Viewing Parameters
- Setting Parameters
-
GUC Parameters
- GUC Parameter Usage
- File Location
- Connection and Authentication
- Resource Consumption
- Parallel Data Import
- Write Ahead Log
- HA Replication
- Query Planning
- Error Reporting and Logging
- Alarm Detection
- Statistics During the Database Running
- Automatic Vacuuming
- Default Settings of Client Connection
- Lock Management
- Version and Platform Compatibility
- Fault Tolerance
- Connection Pool Parameters
- Cluster Transaction Parameters
- Dual-Cluster Replication Parameters
- Developer Options
- Auditing
- Transaction Monitoring
- CM Parameters
- GTM Parameters
- Upgrade Parameters
- Miscellaneous Parameters
- Wait Event
- Query
- System Performance Snapshot
- Security Configuration
- HyperLogLog
- User-defined Functions
- Collaborative Analysis
- Acceleration Cluster
- Scheduled Task
- Thread Pool
- Full Text Search
- Backup and Restoration
- AI Features
- Global SysCache Parameters
- Reserved Parameters
- Read Parameters of the Standby Node in a Distributed System
- Restoring Data on the Standby Node
- Undo
- Rollback Parameters
- DCF Parameters Settings
- Flashback
-
Developer Guide(Centralized_3.x)
- Database System Overview
- Database Security
- Database Quick Start
- Development and Design Proposal
-
Application Development Guide
- Development Specifications
- Obtaining the Driver Package
-
Development Based on JDBC
- JDBC Package, Driver Class, and Environment Class
- Development Process
- Loading a Driver
- Connecting to a Database
- Connecting to a Database (Using SSL)
- Connecting to a Database (Using UDS)
- Running SQL Statements
- Processing Data in a Result Set
- Closing a Connection
- Log Management
- Examples: Common Operations
- Example: Retrying SQL Queries for Applications
- Example: Importing and Exporting Data Through Local Files
- Example: Migrating Data from MY
- Example: Logical Replication Code
- Example: Parameters for Connecting to the Database in Different Scenarios
-
JDBC API Reference
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- PGReplicationConnection
- PGReplicationStream
- ChainedStreamBuilder
- ChainedCommonStreamBuilder
- PGobject
- Common JDBC Parameters
- Troubleshooting
- Mapping for JDBC Data Types
- Development Based on ODBC
- Development Based on libpq
- Psycopg-based Development
- Development Based on the Go Driver
-
ECPG-based Development
- Development Process
- ecpg Components
- ecpg Preprocessing and Compiling
- Managing Database Connections
- Running SQL Commands
- Querying the Result Set
- Closing a Database Connection
- Host Variables
- Executing Dynamic SQL Statements
- Error Handling
- Preprocessor Directives
- Using Library Functions
- SQL Descriptor Area
- Examples
- ECPG API Reference
- Debugging
-
SQL Optimization
- Query Execution Process
- Introduction to the SQL Execution Plan
- Optimization Process
- Updating Statistics
- Reviewing and Modifying a Table Definition
- Typical SQL Optimization Methods
- Experience in Rewriting SQL Statements
- Configuring Key Parameters for SQL Tuning
-
Hint-based Tuning
- Plan Hint Optimization
- Hint Specifying the Query Block Where the Hint Is Located
- Hint Specifying the Query Block and Schema of a Table
- Join Order Hints
- Join Operation Hints
- Rows Hints
- Stream Operation Hints
- Scan Operation Hints
- Sublink Name Hints
- Hint Errors, Conflicts, and Other Warnings
- Optimizer GUC Parameter Hints
- Hint for Selecting the Custom Plan or Generic Plan
- Hints Specifying Not to Expand Subqueries
- Hint Specifying Not to Use Global Plan Cache
- Hint of Parameterized Paths at the Same Level
- Hint for Setting Slow SQL Control Rules
- Hint for Adaptive Plan Selection
- Hint for Materializing a Sub-plan Result
- Bitmap Scan Hints
- Hint for Inner Table Materialization During Join
- AGG Hint
- Introduction to Plan Trace
- Tuning with SQL PATCH
- Optimization Cases
-
SQL Reference
- SQL
- Keywords
- Data Types
- Constant and Macro
-
Functions and Operators
- Logical Operators
- Comparison Operators
- Character Processing Functions and Operators
- Binary String Functions and Operators
- Bit String Functions and Operators
- Pattern Matching Operators
- Arithmetic Functions and Operators
- Date and Time Processing Functions and Operators
- Type Conversion Functions
- Geometric Functions and Operators
- Network Address Functions and Operators
- Text Search Functions and Operators
- JSON/JSONB Functions and Operators
- HLL Functions and Operators
- SEQUENCE Functions
- Array Functions and Operators
- Range Functions and Operators
- Aggregate Functions
- Window Functions
- Security Functions
- Encrypted Functions and Operators
- Set Returning Functions
- Conditional Expression Functions
- System Information Functions
-
System Administration Functions
- Configuration Settings Functions
- Universal File Access Functions
- Server Signal Functions
- Backup and Restoration Control Functions
- DR Control Functions for Dual-Database Instances
- DR Query Functions for Dual-Database Instances
- Snapshot Synchronization Functions
- Database Object Functions
- Advisory Lock Functions
- Logical Replication Functions
- Other Functions
- Undo System Functions
- SQL Statement Concurrency Control Function
- Statistics Information Functions
- Trigger Functions
- Hash Function
- Prompt Message Function
- Global Temporary Table Functions
- Fault Injection System Function
- AI Feature Functions
- Dynamic Data Masking Functions
- Hierarchical Recursion Query Functions
- Other System Functions
- Internal Functions
- Global SysCache Functions
- Data Damage Detection and Repair Functions
- Functions of the XML Type
- Functions of the XMLType Type
- Global PL/SQL Cache Functions
- Obsolete Functions
- Expressions
- Pseudocolumn
- Type Conversion
- System Operation
- Controlling Transactions
- DDL Syntax Overview
- DML Syntax Overview
- DCL Syntax Overview
-
SQL Syntax
- SQL Syntax
- ABORT
- ALTER AGGREGATE
- ALTER AUDIT POLICY
- ALTER COLUMN ENCRYPTION KEY
- ALTER EVENT
- ALTER DATABASE
- ALTER DATABASE LINK
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER FOREIGN DATA WRAPPER
- ALTER FUNCTION
- ALTER GLOBAL CONFIGURATION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER OPERATOR
- ALTER PACKAGE
- ALTER PROCEDURE
- ALTER RESOURCE LABEL
- ALTER RESOURCE POOL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLE SUBPARTITION
- ALTER TABLESPACE
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER USER MAPPING
- ALTER VIEW
- ANALYZE | ANALYSE
- BEGIN
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- COPY
- CREATE AGGREGATE
- CREATE AUDIT POLICY
- CREATE CAST
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE CONVERSION
- CREATE DATABASE
- CREATE DATABASE LINK
- CREATE DIRECTORY
- CREATE EVENT
- CREATE FOREIGN DATA WRAPPER
- CREATE FUNCTION
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE OPERATOR
- CREATE OPERATOR CLASS
- CREATE PACKAGE
- CREATE PROCEDURE
- CREATE RESOURCE LABEL
- CREATE RESOURCE POOL
- CREATE ROLE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE RULE
- CREATE SCHEMA
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TABLESPACE
- CREATE TABLE SUBPARTITION
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE USER MAPPING
- CREATE VIEW
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
- DEALLOCATE
- DECLARE
- DELETE
- DO
- DROP AGGREGATE
- DROP AUDIT POLICY
- DROP CAST
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATABASE LINK
- DROP DIRECTORY
- DROP EVENT
- DROP FOREIGN DATA WRAPPER
- DROP FUNCTION
- DROP GLOBAL CONFIGURATION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP OPERATOR
- DROP OWNED
- DROP PACKAGE
- DROP PROCEDURE
- DROP RESOURCE LABEL
- DROP RESOURCE POOL
- DROP ROLE
- DROP ROW LEVEL SECURITY POLICY
- DROP RULE
- DROP SCHEMA
- DROP SEQUENCE
- DROP SERVER
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP USER MAPPING
- DROP VIEW
- DROP WEAK PASSWORD DICTIONARY
- EXECUTE
- EXPDP DATABASE
- EXPDP TABLE
- EXPLAIN
- EXPLAIN PLAN
- FETCH
- GRANT
- IMPDP DATABASE CREATE
- IMPDP RECOVER
- IMPDP TABLE
- IMPDP TABLE PREPARE
- INSERT
- LOCK
- MERGE INTO
- MOVE
- PREDICT BY
- PREPARE
- PREPARE TRANSACTION
- PURGE
- REASSIGN OWNED
- REFRESH INCREMENTAL MATERIALIZED VIEW
- REFRESH MATERIALIZED VIEW
- REINDEX
- RELEASE SAVEPOINT
- RESET
- REVOKE
- ROLLBACK
- ROLLBACK PREPARED
- ROLLBACK TO SAVEPOINT
- SAVEPOINT
- SELECT
- SELECT INTO
- SET
- SET CONSTRAINTS
- SET ROLE
- SET SESSION AUTHORIZATION
- SET TRANSACTION
- SHOW
- SHOW EVENTS
- SHUTDOWN
- SNAPSHOT
- START TRANSACTION
- TIMECAPSULE TABLE
- TRUNCATE
- UPDATE
- VACUUM
- VALUES
- ALTER EXTENSION
- CREATE EXTENSION
- DROP EXTENSION
- Appendix
- Best Practices
- User-defined Functions
- Stored Procedure
- Autonomous Transaction
-
System Catalogs and System Views
- Overview of System Catalogs and System Views
-
System Catalogs
- GS_ASP
- GS_AUDITING_POLICY
- GS_AUDITING_POLICY_ACCESS
- GS_AUDITING_POLICY_FILTERS
- GS_AUDITING_POLICY_PRIVILEGES
- GS_CLIENT_GLOBAL_KEYS
- GS_CLIENT_GLOBAL_KEYS_ARGS
- GS_COLUMN_KEYS
- GS_COLUMN_KEYS_ARGS
- GS_DATABASE_LINK
- GS_DB_PRIVILEGE
- GS_DEPENDENCIES
- GS_DEPENDENCIES_OBJ
- GS_ENCRYPTED_COLUMNS
- GS_ENCRYPTED_PROC
- GS_GLOBAL_CONFIG
- GS_JOB_ARGUMENT
- GS_JOB_ATTRIBUTE
- GS_MASKING_POLICY
- GS_MASKING_POLICY_ACTIONS
- GS_MASKING_POLICY_FILTERS
- GS_MATVIEW
- GS_MATVIEW_DEPENDENCY
- GS_MODEL_WAREHOUSE
- GS_OPT_MODEL
- GS_PACKAGE
- GS_PLAN_TRACE
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_SQL_PATCH
- GS_TXN_SNAPSHOT
- GS_UID
- GS_WORKLOAD_RULE
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_APP_WORKLOADGROUP_MAPPING
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_AUTHID
- PG_AUTH_HISTORY
- PG_AUTH_MEMBERS
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DB_ROLE_SETTING
- PG_DEFAULT_ACL
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EXTENSION
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_HASHBUCKET
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PARTITION
- PG_PLTEMPLATE
- PG_PROC
- PG_RANGE
- PG_REPLICATION_ORIGIN
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_RLSPOLICY
- PG_SECLABEL
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_SHSECLABEL
- PG_SET
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PG_USER_MAPPING
- PG_USER_STATUS
- PGXC_CLASS
- PGXC_GROUP
- PGXC_NODE
- PGXC_SLICE
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- STREAMING_STREAM
- STREAMING_CONT_QUERY
-
System Views
- ADM_ARGUMENTS
- ADM_AUDIT_OBJECT
- ADM_AUDIT_SESSION
- ADM_AUDIT_STATEMENT
- ADM_AUDIT_TRAIL
- ADM_COL_COMMENTS
- ADM_COL_PRIVS
- ADM_COLL_TYPES
- ADM_CONS_COLUMNS
- ADM_CONSTRAINTS
- ADM_DATA_FILES
- ADM_DEPENDENCIES
- ADM_DIRECTORIES
- ADM_HIST_SNAPSHOT
- ADM_HIST_SQL_PLAN
- ADM_HIST_SQLSTAT
- ADM_HIST_SQLTEXT
- ADM_IND_COLUMNS
- ADM_IND_EXPRESSIONS
- ADM_IND_PARTITIONS
- ADM_IND_SUBPARTITIONS
- ADM_INDEXES
- ADM_OBJECTS
- ADM_PART_COL_STATISTICS
- ADM_PART_INDEXES
- ADM_PART_TABLES
- ADM_PROCEDURES
- ADM_RECYCLEBIN
- ADM_ROLE_PRIVS
- ADM_ROLES
- ADM_SCHEDULER_JOB_ARGS
- ADM_SCHEDULER_JOBS
- ADM_SCHEDULER_PROGRAM_ARGS
- ADM_SCHEDULER_PROGRAMS
- ADM_SCHEDULER_RUNNING_JOBS
- ADM_SEGMENTS
- ADM_SEQUENCES
- ADM_SOURCE
- ADM_SUBPART_COL_STATISTICS
- ADM_SUBPART_KEY_COLUMNS
- ADM_SYNONYMS
- ADM_SYS_PRIVS
- ADM_TAB_COL_STATISTICS
- ADM_TAB_COLS
- ADM_TAB_HISTOGRAMS
- ADM_TAB_PRIVS
- ADM_TAB_STATISTICS
- ADM_TAB_STATS_HISTORY
- ADM_TAB_SUBPARTITIONS
- ADM_TABLES
- ADM_TABLESPACES
- ADM_TAB_COLUMNS
- ADM_TAB_COMMENTS
- ADM_TAB_PARTITIONS
- ADM_TRIGGERS
- ADM_TYPE_ATTRS
- ADM_TYPES
- ADM_USERS
- ADM_VIEWS
- DB_ALL_TABLES
- DB_ARGUMENTS
- DB_COL_COMMENTS
- DB_COL_PRIVS
- DB_COLL_TYPES
- DB_CONS_COLUMNS
- DB_CONSTRAINTS
- DB_DEPENDENCIES
- DB_ERRORS
- DB_IND_COLUMNS
- DB_IND_EXPRESSIONS
- DB_IND_PARTITIONS
- DB_IND_SUBPARTITIONS
- DB_INDEXES
- DB_OBJECTS
- DB_PART_COL_STATISTICS
- DB_PART_INDEXES
- DB_PART_KEY_COLUMNS
- DB_PART_TABLES
- DB_PROCEDURES
- DB_SCHEDULER_JOB_ARGS
- DB_SCHEDULER_PROGRAM_ARGS
- DB_SEQUENCES
- DB_SOURCE
- DB_SUBPART_COL_STATISTICS
- DB_SUBPART_KEY_COLUMNS
- DB_SYNONYMS
- DB_TAB_COL_STATISTICS
- DB_TAB_COLUMNS
- DB_TAB_COMMENTS
- DB_TAB_HISTOGRAMS
- DB_TAB_PARTITIONS
- DB_TAB_STATS_HISTORY
- DB_TAB_SUBPARTITIONS
- DB_TABLES
- DB_TRIGGERS
- DB_TYPES
- DB_USERS
- DB_VIEWS
- DICT
- DICTIONARY
- DV_SESSION_LONGOPS
- DV_SESSIONS
- GS_ALL_CONTROL_GROUP_INFO
- GS_ALL_PREPARED_STATEMENTS
- GS_AUDITING
- GS_AUDITING_ACCESS
- GS_AUDITING_PRIVILEGE
- GS_CLUSTER_RESOURCE_INFO
- GS_COMM_LISTEN_ADDRESS_EXT_INFO
- GS_COMM_PROXY_THREAD_STATUS
- GS_DB_LINKS
- GS_DB_PRIVILEGES
- GS_FILE_STAT
- GS_GET_CONTROL_GROUP_INFO
- GS_GET_LISTEN_ADDRESS_EXT_INFO
- GS_GLC_MEMORY_DETAIL
- GS_GLOBAL_ARCHIVE_STATUS
- GS_GSC_MEMORY_DETAIL
- GS_INSTANCE_TIME
- GS_LABELS
- GS_LSC_MEMORY_DETAIL
- GS_MASKING
- GS_MATVIEWS
- GS_MY_PLAN_TRACE
- GS_OS_RUN_INFO
- GS_REDO_STAT
- GS_SESSION_ALL_SETTINGS
- GS_SESSION_MEMORY
- GS_SESSION_MEMORY_CONTEXT
- GS_SESSION_MEMORY_DETAIL
- GS_SESSION_STAT
- GS_SESSION_TIME
- GS_SQL_COUNT
- GS_STAT_ALL_PARTITIONS
- GS_STAT_XACT_ALL_PARTITIONS
- GS_STATIO_ALL_PARTITIONS
- GS_THREAD_MEMORY_CONTEXT
- GS_TOTAL_MEMORY_DETAIL
- GS_TOTAL_NODEGROUP_MEMORY_DETAIL
- GS_WLM_WORKLOAD_RECORDS
- GS_WORKLOAD_RULE_STAT
- GV_INSTANCE
- GV_SESSION
- MPP_TABLES
- MY_COL_COMMENTS
- MY_COL_PRIVS
- MY_COLL_TYPES
- MY_CONS_COLUMNS
- MY_CONSTRAINTS
- MY_DEPENDENCIES
- MY_ERRORS
- MY_IND_COLUMNS
- MY_IND_EXPRESSIONS
- MY_IND_PARTITIONS
- MY_IND_SUBPARTITIONS
- MY_INDEXES
- MY_JOBS
- MY_OBJECTS
- MY_PART_COL_STATISTICS
- MY_PART_INDEXES
- MY_PART_KEY_COLUMNS
- MY_PART_TABLES
- MY_PROCEDURES
- MY_RECYCLEBIN
- MY_ROLE_PRIVS
- MY_SCHEDULER_JOB_ARGS
- MY_SCHEDULER_PROGRAM_ARGS
- MY_SEQUENCES
- MY_SOURCE
- MY_SUBPART_COL_STATISTICS
- MY_SUBPART_KEY_COLUMNS
- MY_SYNONYMS
- MY_SYS_PRIVS
- MY_TAB_COL_STATISTICS
- MY_TAB_COLUMNS
- MY_TAB_COMMENTS
- MY_TAB_HISTOGRAMS
- MY_TAB_PARTITIONS
- MY_TAB_STATISTICS
- MY_TAB_STATS_HISTORY
- MY_TAB_SUBPARTITIONS
- MY_TABLES
- MY_TABLESPACES
- MY_TRIGGERS
- MY_TYPE_ATTRS
- MY_TYPES
- MY_VIEWS
- NLS_DATABASE_PARAMETERS
- NLS_INSTANCE_PARAMETERS
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_AVAILABLE_EXTENSIONS
- PG_COMM_DELAY
- PG_COMM_RECV_STREAM
- PG_COMM_SEND_STREAM
- PG_COMM_STATUS
- PG_CONTROL_GROUP_CONFIG
- PG_CURSORS
- PG_EXT_STATS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_GTT_ATTACHED_PIDS
- PG_GTT_RELSTATS
- PG_GTT_STATS
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_REPLICATION_ORIGIN_STATUS
- PG_REPLICATION_SLOTS
- PG_RLSPOLICIES
- PG_ROLES
- PG_RULES
- PG_RUNNING_XACTS
- PG_SECLABELS
- PG_SETTINGS
- PG_SHADOW
- PG_STAT_ACTIVITY
- PG_STAT_ACTIVITY_NG
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_REPLICATION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATS
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_TABLES
- PG_TDE_INFO
- PG_THREAD_WAIT_STATUS
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_USER
- PG_USER_MAPPINGS
- PG_VARIABLE_INFO
- PG_VIEWS
- PGXC_PREPARED_XACTS
- PGXC_THREAD_WAIT_STATUS
- PLAN_TABLE
- ROLE_ROLE_PRIVS
- ROLE_SYS_PRIVS
- ROLE_TAB_PRIVS
- SYS_DUMMY
- V_INSTANCE
- V_MYSTAT
- V_SESSION
- V$GLOBAL_TRANSACTION
- V$NLS_PARAMETERS
- V$SESSION_WAIT
- V$SYSSTAT
- V$SYSTEM_EVENT
- V$VERSION
- Discarded
-
Schemas
- Information Schema
-
DBE_PERF Schema
- OS
- Instance
- Memory
- File
-
Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
- GLOBAL_STAT_XACT_ALL_TABLES
- STAT_XACT_SYS_TABLES
- SUMMARY_STAT_XACT_SYS_TABLES
- GLOBAL_STAT_XACT_SYS_TABLES
- STAT_XACT_USER_TABLES
- SUMMARY_STAT_XACT_USER_TABLES
- GLOBAL_STAT_XACT_USER_TABLES
- STAT_XACT_USER_FUNCTIONS
- SUMMARY_STAT_XACT_USER_FUNCTIONS
- GLOBAL_STAT_XACT_USER_FUNCTIONS
- STAT_BAD_BLOCK
- SUMMARY_STAT_BAD_BLOCK
- GLOBAL_STAT_BAD_BLOCK
- STAT_USER_FUNCTIONS
- SUMMARY_STAT_USER_FUNCTIONS
- GLOBAL_STAT_USER_FUNCTIONS
- Workload
-
Session/Thread
- SESSION_STAT
- GLOBAL_SESSION_STAT
- SESSION_TIME
- GLOBAL_SESSION_TIME
- SESSION_MEMORY
- GLOBAL_SESSION_MEMORY
- SESSION_MEMORY_DETAIL
- GLOBAL_SESSION_MEMORY_DETAIL
- SESSION_STAT_ACTIVITY
- GLOBAL_SESSION_STAT_ACTIVITY
- THREAD_WAIT_STATUS
- GLOBAL_THREAD_WAIT_STATUS
- LOCAL_THREADPOOL_STATUS
- GLOBAL_THREADPOOL_STATUS
- LOCAL_ACTIVE_SESSION
- Transaction
- Query
-
Cache/IO
- STATIO_USER_TABLES
- SUMMARY_STATIO_USER_TABLES
- GLOBAL_STATIO_USER_TABLES
- STATIO_USER_INDEXES
- SUMMARY_STATIO_USER_INDEXES
- GLOBAL_STATIO_USER_INDEXES
- STATIO_USER_SEQUENCES
- SUMMARY_STATIO_USER_SEQUENCES
- GLOBAL_STATIO_USER_SEQUENCES
- STATIO_SYS_TABLES
- SUMMARY_STATIO_SYS_TABLES
- GLOBAL_STATIO_SYS_TABLES
- STATIO_SYS_INDEXES
- SUMMARY_STATIO_SYS_INDEXES
- GLOBAL_STATIO_SYS_INDEXES
- STATIO_SYS_SEQUENCES
- SUMMARY_STATIO_SYS_SEQUENCES
- GLOBAL_STATIO_SYS_SEQUENCES
- STATIO_ALL_TABLES
- SUMMARY_STATIO_ALL_TABLES
- GLOBAL_STATIO_ALL_TABLES
- STATIO_ALL_INDEXES
- SUMMARY_STATIO_ALL_INDEXES
- GLOBAL_STATIO_ALL_INDEXES
- STATIO_ALL_SEQUENCES
- SUMMARY_STATIO_ALL_SEQUENCES
- GLOBAL_STATIO_ALL_SEQUENCES
-
Utility
- REPLICATION_STAT
- GLOBAL_REPLICATION_STAT
- REPLICATION_SLOTS
- GLOBAL_REPLICATION_SLOTS
- BGWRITER_STAT
- GLOBAL_BGWRITER_STAT
- GLOBAL_CKPT_STATUS
- GLOBAL_DOUBLE_WRITE_STATUS
- GLOBAL_PAGEWRITER_STATUS
- GLOBAL_RECORD_RESET_TIME
- GLOBAL_REDO_STATUS
- GLOBAL_RECOVERY_STATUS
- CLASS_VITAL_INFO
- USER_LOGIN
- SUMMARY_USER_LOGIN
- GLOBAL_SINGLE_FLUSH_DW_STATUS
- GLOBAL_CANDIDATE_STATUS
- PARALLEL_DECODE_STATUS
- GLOBAL_PARALLEL_DECODE_STATUS
- PARALLEL_DECODE_THREAD_INFO
- GLOBAL_PARALLEL_DECODE_THREAD_INFO
- Lock
- Wait Events
- Configuration
- Operator
- Workload Manager
- Global Plancache
- RTO & RPO
- AI Watchdog
- Discarded
- WDR Snapshot Schema
-
DBE_PLDEBUGGER Schema
- DBE_PLDEBUGGER.turn_on
- DBE_PLDEBUGGER.turn_off
- DBE_PLDEBUGGER.local_debug_server_info
- DBE_PLDEBUGGER.attach
- DBE_PLDEBUGGER.info_locals
- DBE_PLDEBUGGER.next
- DBE_PLDEBUGGER.continue
- DBE_PLDEBUGGER.abort
- DBE_PLDEBUGGER.print_var
- DBE_PLDEBUGGER.info_code
- DBE_PLDEBUGGER.step
- DBE_PLDEBUGGER.add_breakpoint
- DBE_PLDEBUGGER.delete_breakpoint
- DBE_PLDEBUGGER.info_breakpoints
- DBE_PLDEBUGGER.backtrace
- DBE_PLDEBUGGER.enable_breakpoint
- DBE_PLDEBUGGER.disable_breakpoint
- DBE_PLDEBUGGER.finish
- DBE_PLDEBUGGER.set_var
- DB4AI Schema
- DBE_PLDEVELOPER
- DBE_SQL_UTIL Schema
-
Configuring Running Parameters
- Viewing Parameters
- Setting Parameters
-
GUC Parameters
- GUC Parameter Usage
- File Location
- Connection and Authentication
- Resource Consumption
- Data Import and Export
- Write Ahead Log
- HA Replication
- Query Planning
- Error Reporting and Logging
- Alarm Detection
- Statistics During the Database Running
- Automatic Vacuuming
- Default Settings of Client Connection
- Lock Management
- Version and Platform Compatibility
- Fault Tolerance
- Connection Pool Parameters
- Transaction
- Replication Parameters of Two Database Instances
- Developer Options
- Auditing
- CM Parameters
- Upgrade Parameters
- Miscellaneous Parameters
- Wait Events
- Query
- System Performance Snapshot
- Security Configuration
- Global Temporary Table
- HyperLogLog
- User-defined Functions
- Scheduled Task
- Thread Pool
- Backup and Restoration
- Undo
- DCF Parameters Settings
- Flashback
- Rollback Parameters
- Reserved Parameters
- AI Features
- Global SysCache Parameters
- Parameters Related to the Efficient Data Compression Algorithm
- Restoring Data on the Standby Node
- Delimiter
- Global PL/SQL Cache Parameters
-
Developer Guide(Distributed_2.x)
- Overview
- Working with Databases
- Development and Design Proposal
- Best Practices
-
Tutorial: Using GDS to Import Data from a Remote Server
- Overview
- Prerequisites
- Step 1: Preparing Source Data
- Step 2: Installing, Configuring, and Starting GDS on a Data Server
- Step 3: Creating a Foreign Table in GaussDB
- Step 4: Importing Data to GaussDB
- Step 5: Analyzing and Handling Import Errors
- Step 6: Improving Query Efficiency After Data Import
- Step 7: Stopping GDS
- Step 8: Cleaning Up Resources
-
Application Development Guide
- Development Specifications
- Obtaining the Driver Package
-
Development Based on JDBC
- JDBC Package, Driver Class, and Environment Class
- Development Process
- Loading a Driver
- Connecting to a Database
- Connecting to the Database (Using SSL)
- Connecting to a Database (Using UDS)
- Running SQL Statements
- Processing Data in a Result Set
- Closing a Connection
- Log Management
- Example: Common Operations
- Example: Retrying SQL Queries for Applications
- Example: Importing and Exporting Data Through Local Files
- Example: Migrating Data from MySQL
- Example: Logic Replication Code
- Example: Parameters for Connecting to the Database in Different Scenarios
- JDBC Interface Reference
- Development Based on ODBC
- Development Based on libpq
- Psycopg-based Development
- Database Security Management
-
Importing Data
- Importing Data in Parallel Using Foreign Tables
- Running the INSERT Statement to Insert Data
- Running the COPY FROM STDIN Statement to Import Data
- Using a gsql Meta-Command to Import Data
- Updating Data in a Table
- Deep Copy
- Checking for Data Skew
- Analyzing Tables
- Doing VACUUM to a Table
- Managing Concurrent Write Operations
- Exporting Data
-
Performance Tuning
- Overview
- Determining the Scope of Performance Tuning
-
SQL Optimization
- Query Execution Process
- Introduction to the SQL Execution Plan
- Optimization Process
- Updating Statistics
- Reviewing and Modifying a Table Definition
- Typical SQL Optimization Methods
- Experience in Rewriting SQL Statements
- Configuring Key Parameters for SQL Tuning
-
Hint-based Tuning
- Plan Hint Optimization
- Join Order Hints
- Join Operation Hints
- Rows Hints
- Stream Operation Hints
- Scan Operation Hints
- Sublink Name Hints
- Skew Hints
- Parameterized Path Hint
- Hint Errors, Conflicts, and Other Warnings
- Plan Hint Cases
- Optimizer GUC Parameter Hints
- Hints for Selecting the Custom Plan or Generic Plan
- Hints Specifying Not to Expand Subqueries
- Hints Specifying Not to Use Global Plan Cache
- Hint of Parameterized Paths at the Same Level
- Checking the Implicit Conversion Performance
- Using the Vectorized Executor for Tuning
-
Optimization Cases
- Case: Selecting an Appropriate Distribution Key
- Case: Creating an Appropriate Index
- Case: Adding NOT NULL for JOIN Columns
- Case: Pushing Down Sort Operations to DNs
- Case: Setting cost_param and Optimizing Query Performance
- Case: Adjusting Distribution Keys
- Case: Adjusting Partial Clustering Keys
- Case: Adjusting the Table Storage Model in a Medium Table
- Case: Adjusting Partial Clustering Keys
- Case: Modifying a Partitioned Table
- Case: Adjusting the GUC Parameter best_agg_plan
- Case: Rewriting SQL and Deleting Subqueries (1)
- Case: Rewriting SQL and Deleting Subqueries (2)
- Case: Rewriting SQL Statements to Eliminate Pruning Interference
- Case: Rewriting SQL Statements and Deleting in-clause
- Case: Setting Partial Cluster Keys
- Case: Modifying the GUC Parameter rewrite_rule
- Case: Using DN Gather to Reduce Stream Nodes in the Plan
- Case: Adjusting I/O Parameters to Reduce the Log Bloat Rate
- Configuring Running Parameters
-
SQL Reference
- GaussDB SQL
- Keywords
-
Data Type
- Numeric Types
- Monetary Types
- Boolean Types
- Character Types
- Binary Types
- Date/Time Types
- Geometric Types
- Network Address Types
- Bit String Types
- Text Search Types
- UUID Type
- JSON/JSONB Types
- HLL
- Range
- Object Identifier Types
- Pseudo-Types
- Data Types Supported by Column-store Tables
- Data Types Used by the Ledger Database
- ACLItem
- Constant and Macro
-
Functions and Operators
- Logical Operators
- Comparison Operators
- Character Processing Functions and Operators
- Binary String Functions and Operators
- Bit String Functions and Operators
- Pattern Matching Operators
- Arithmetic Functions and Operators
- Date and Time Processing Functions and Operators
- Type Conversion Functions
- Geometric Functions and Operators
- Network Address Functions and Operators
- Text Search Functions and Operators
- JSON/JSONB Functions and Operators
- HLL Functions and Operators
- SEQUENCE Functions
- Array Functions and Operators
- Range Functions and Operators
- Aggregate Functions
- Window Functions
- Security Functions
- Ledger Database Functions
- Encrypted Equality Functions
- Set Returning Functions
- Conditional Expression Functions
- System Information Functions
-
System Administration Functions
- Configuration Settings Functions
- Universal File Access Functions
- Server Signal Functions
- Backup and Restoration Control Functions
- Dual-Cluster DR Control Functions
- Dual-Cluster DR Query Functions
- Snapshot Synchronization Functions
- Database Object Functions
- Advisory Lock Functions
- Logical Replication Functions
- Segment-Page Storage Functions
- Other Functions
- Statistics Information Functions
- Trigger Functions
- Hash Function
- Prompt Message Function
- Fault Injection System Function
- Redistribution Parameters
- Distribution Column Recommendation Functions
- Other System Functions
- Internal Functions
- AI Feature Functions
- Dynamic Data Masking Functions
- Hotkey Feature Functions
- Global SysCache Functions
- Data Damage Detection and Repair Functions
- Obsolete Functions
- Expressions
- Type Conversion
- Full Text Search
- System Operation
- Controlling Transactions
- DDL Syntax Overview
- DML Syntax Overview
- DCL Syntax Overview
-
SQL Syntax
- ABORT
- ALTER APP WORKLOAD GROUP MAPPING
- ALTER AUDIT POLICY
- ALTER COORDINATOR
- ALTER DATABASE
- ALTER DATA SOURCE
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER FOREIGN TABLE (for Import and Export)
- ALTER FUNCTION
- ALTER GLOBAL CONFIGURATION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER LARGE OBJECT
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER NODE
- ALTER NODE GROUP
- ALTER RESOURCE LABEL
- ALTER RESOURCE POOL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLESPACE
- ALTER TEXT SEARCH CONFIGURATION
- ALTER TEXT SEARCH DICTIONARY
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER VIEW
- ALTER WORKLOAD GROUP
- ANALYZE | ANALYSE
- BEGIN
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- COPY
- CREATE APP WORKLOAD GROUP MAPPING
- CREATE AUDIT POLICY
- CREATE BARRIER
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE CONVERSION
- CREATE DATABASE
- CREATE DATA SOURCE
- CREATE DIRECTORY
- CREATE FOREIGN TABLE (for Import and Export)
- CREATE FUNCTION
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE NODE
- CREATE NODE GROUP
- CREATE PROCEDURE
- CREATE RESOURCE LABEL
- CREATE RESOURCE POOL
- CREATE ROLE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE SCHEMA
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLESPACE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TEXT SEARCH CONFIGURATION
- CREATE TEXT SEARCH DICTIONARY
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE VIEW
- CREATE WORKLOAD GROUP
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
- DEALLOCATE
- DECLARE
- DELETE
- DO
- DROP APP WORKLOAD GROUP MAPPING
- DROP AUDIT POLICY
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATA SOURCE
- DROP DIRECTORY
- DROP FOREIGN TABLE
- DROP FUNCTION
- DROP GLOBAL CONFIGURATION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP NODE
- DROP NODE GROUP
- DROP OWNED
- DROP PROCEDURE
- DROP RESOURCE LABEL
- DROP RESOURCE POOL
- DROP ROLE
- DROP ROW LEVEL SECURITY POLICY
- DROP SCHEMA
- DROP SEQUENCE
- DROP SERVER
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TEXT SEARCH CONFIGURATION
- DROP TEXT SEARCH DICTIONARY
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP VIEW
- DROP WORKLOAD GROUP
- DROP WEAK PASSWORD DICTIONARY
- EXECUTE
- EXECUTE DIRECT
- EXPLAIN
- EXPLAIN PLAN
- FETCH
- GRANT
- INSERT
- LOCK
- MOVE
- MERGE INTO
- PREDICT BY
- PREPARE
- PREPARE TRANSACTION
- REASSIGN OWNED
- REINDEX
- REFRESH INCREMENTAL MATERIALIZED VIEW
- REFRESH MATERIALIZED VIEW
- RELEASE SAVEPOINT
- RESET
- REVOKE
- ROLLBACK
- ROLLBACK PREPARED
- ROLLBACK TO SAVEPOINT
- SAVEPOINT
- SELECT
- SELECT INTO
- SET
- SET CONSTRAINTS
- SET ROLE
- SET SESSION AUTHORIZATION
- SET TRANSACTION
- SHOW
- SHUTDOWN
- START TRANSACTION
- TRUNCATE
- UPDATE
- VACUUM
- VALUES
- Appendix
- Stored Procedures
- Autonomous Transaction
-
System Catalogs and System Views
- Overview of System Catalogs and System Views
-
System Catalogs
- GS_AUDITING_POLICY
- GS_AUDITING_POLICY_ACCESS
- GS_AUDITING_POLICY_FILTERS
- GS_AUDITING_POLICY_PRIVILEGES
- GS_ASP
- GS_CLIENT_GLOBAL_KEYS
- GS_CLIENT_GLOBAL_KEYS_ARGS
- GS_COLUMN_KEYS
- GS_COLUMN_KEYS_ARGS
- GS_DB_PRIVILEGE
- GS_ENCRYPTED_COLUMNS
- GS_ENCRYPTED_PROC
- GS_GLOBAL_CHAIN
- GS_GLOBAL_CONFIG
- GS_JOB_ATTRIBUTE
- GS_JOB_ARGUMENT
- GS_MASKING_POLICY
- GS_MASKING_POLICY_ACTIONS
- GS_MASKING_POLICY_FILTERS
- GS_MATVIEW
- GS_MATVIEW_DEPENDENCY
- GS_MODEL_WAREHOUSE
- GS_OBSSCANINFO
- GS_OPT_MODEL
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_SQL_PATCH
- GS_TXN_SNAPSHOT
- GS_UID
- GS_WLM_EC_OPERATOR_INFO
- GS_WLM_INSTANCE_HISTORY
- GS_WLM_OPERATOR_INFO
- GS_WLM_SESSION_QUERY_INFO_ALL
- GS_WLM_USER_RESOURCE_HISTORY
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_APP_WORKLOADGROUP_MAPPING
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_AUTHID
- PG_AUTH_HISTORY
- PG_AUTH_MEMBERS
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DB_ROLE_SETTING
- PG_DEFAULT_ACL
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EXTENSION
- PG_EXTENSION_DATA_SOURCE
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_FOREIGN_TABLE
- PG_HASHBUCKET
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OBSSCANINFO
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PARTITION
- PG_PLTEMPLATE
- PG_PROC
- PG_PUBLICATION
- PG_PUBLICATION_REL
- PG_RANGE
- PG_REPLICATION_ORIGIN
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_RLSPOLICY
- PG_SECLABEL
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_SHSECLABEL
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SUBSCRIPTION
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PG_USER_MAPPING
- PG_USER_STATUS
- PG_WORKLOAD_GROUP
- PGXC_CLASS
- PGXC_GROUP
- PGXC_NODE
- PGXC_REDISTB
- PGXC_SLICE
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- STREAMING_STREAM
- STREAMING_CONT_QUERY
- STREAMING_REAPER_STATUS
-
System Views
- ADM_COL_COMMENTS
- ADM_CONS_COLUMNS
- ADM_CONSTRAINTS
- ADM_DATA_FILES
- ADM_HIST_SNAPSHOT
- ADM_HIST_SQL_PLAN
- ADM_HIST_SQLSTAT
- ADM_INDEXES
- ADM_IND_COLUMNS
- ADM_IND_EXPRESSIONS
- ADM_IND_PARTITIONS
- ADM_OBJECTS
- ADM_PART_INDEXES
- ADM_PART_TABLES
- ADM_PROCEDURES
- ADM_SEQUENCES
- ADM_SCHEDULER_JOBS
- ADM_SOURCE
- ADM_SYNONYMS
- ADM_TABLES
- ADM_TABLESPACES
- ADM_TAB_COLUMNS
- ADM_TAB_COMMENTS
- ADM_TAB_PARTITIONS
- ADM_TRIGGERS
- ADM_TYPE_ATTRS
- ADM_USERS
- ADM_VIEWS
- COMM_CLIENT_INFO
- DB_ALL_TABLES
- DB_CONSTRAINTS
- DB_CONS_COLUMNS
- DB_DEPENDENCIES
- DB_IND_COLUMNS
- DB_IND_EXPRESSIONS
- DB_INDEXES
- DB_OBJECTS
- DB_PROCEDURES
- DB_SEQUENCES
- DB_SOURCE
- DB_SYNONYMS
- DB_TAB_COLUMNS
- DB_TAB_COMMENTS
- DB_COL_COMMENTS
- DB_TABLES
- DB_TRIGGERS
- DB_USERS
- DB_VIEWS
- DV_SESSIONS
- DV_SESSION_LONGOPS
- GET_GLOBAL_PREPARED_XACTS
- GLOBAL_BAD_BLOCK_INFO
- GLOBAL_CLEAR_BAD_BLOCK_INFO
- GLOBAL_COMM_CLIENT_INFO
- GLOBAL_STAT_HOTKEYS_INFO
- GLOBAL_WAL_SENDER_STATUS
- GS_ALL_CONTROL_GROUP_INFO
- GS_AUDITING
- GS_AUDITING_ACCESS
- GS_AUDITING_PRIVILEGE
- GS_CLUSTER_RESOURCE_INFO
- GS_DB_PRIVILEGES
- GS_GET_CONTROL_GROUP_INFO
- GS_GSC_MEMORY_DETAIL
- GS_LABELS
- GS_LSC_MEMORY_DETAIL
- GS_MASKING
- GS_MATVIEWS
- GS_MATVIEWS
- GS_SESSION_CPU_STATISTICS
- GS_SESSION_MEMORY_STATISTICS
- GS_SQL_COUNT
- GS_STAT_DB_CU
- GS_STAT_SESSION_CU
- GS_TOTAL_NODEGROUP_MEMORY_DETAIL
- GS_WLM_CGROUP_INFO
- GS_WLM_EC_OPERATOR_STATISTICS
- GS_WLM_EC_OPERATOR_HISTORY
- GS_WLM_OPERATOR_HISTORY
- GS_WLM_OPERATOR_STATISTICS
- GS_WLM_REBUILD_USER_RESOURCE_POOL
- GS_WLM_RESOURCE_POOL
- GS_WLM_SESSION_HISTORY
- GS_WLM_SESSION_INFO
- GS_WLM_SESSION_INFO_ALL
- GS_WLM_USER_INFO
- GS_WLM_USER_SESSION_INFO
- GS_WLM_SESSION_STATISTICS
- GS_WLM_WORKLOAD_RECORDS
- GV_SESSION
- MPP_TABLES
- MY_COL_COMMENTS
- MY_CONS_COLUMNS
- MY_CONSTRAINTS
- MY_INDEXES
- MY_IND_COLUMNS
- MY_IND_EXPRESSIONS
- MY_IND_PARTITIONS
- MY_JOBS
- MY_OBJECTS
- MY_PART_INDEXES
- MY_PART_TABLES
- MY_PROCEDURES
- MY_SEQUENCES
- MY_SOURCE
- MY_SYNONYMS
- MY_TAB_COLUMNS
- MY_TAB_COMMENTS
- MY_TAB_PARTITIONS
- MY_TABLES
- MY_TRIGGERS
- MY_VIEWS
- PG_AVAILABLE_EXTENSIONS
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_COMM_DELAY
- PG_COMM_RECV_STREAM
- PG_COMM_SEND_STREAM
- PG_COMM_STATUS
- PG_CONTROL_GROUP_CONFIG
- PG_CURSORS
- PG_EXT_STATS
- PG_GET_INVALID_BACKENDS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_POOLER_STATUS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_PUBLICATION_TABLES
- PG_REPLICATION_ORIGIN_STATUS
- PG_REPLICATION_SLOTS
- PG_RLSPOLICIES
- PG_ROLES
- PG_RULES
- PG_RUNNING_XACTS
- PG_SECLABELS
- PG_SESSION_IOSTAT
- PG_SESSION_WLMSTAT
- PG_SETTINGS
- PG_SHADOW
- PG_SHARED_MEMORY_DETAIL
- PG_STATS
- PG_STAT_ACTIVITY
- PG_STAT_ACTIVITY_NG
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_REPLICATION
- PG_STAT_SUBSCRIPTION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_THREAD_WAIT_STATUS
- PG_TABLES
- PG_TDE_INFO
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_USER
- PG_USER_MAPPINGS
- PG_VARIABLE_INFO
- PG_VIEWS
- PG_WLM_STATISTICS
- PGXC_COMM_DELAY
- PGXC_COMM_RECV_STREAM
- PGXC_COMM_SEND_STREAM
- PGXC_COMM_STATUS
- PGXC_GET_STAT_ALL_TABLES
- PGXC_GET_TABLE_SKEWNESS
- PGXC_NODE_ENV
- PGXC_OS_THREADS
- PGXC_PREPARED_XACTS
- PGXC_RUNNING_XACTS
- PGXC_STAT_ACTIVITY
- PGXC_STAT_BAD_BLOCK
- PGXC_SQL_COUNT
- PGXC_THREAD_WAIT_STATUS
- PGXC_TOTAL_MEMORY_DETAIL
- PGXC_VARIABLE_INFO
- PGXC_WLM_EC_OPERATOR_HISTORY
- PGXC_WLM_EC_OPERATOR_INFO
- PGXC_WLM_EC_OPERATOR_STATISTICS
- PGXC_WLM_OPERATOR_HISTORY
- PGXC_WLM_OPERATOR_INFO
- PGXC_WLM_OPERATOR_STATISTICS
- PGXC_WLM_REBUILD_USER_RESPOOL
- PGXC_WLM_SESSION_HISTORY
- PGXC_WLM_SESSION_INFO
- PGXC_WLM_SESSION_STATISTICS
- PGXC_WLM_WORKLOAD_RECORDS
- PLAN_TABLE
- PV_FILE_STAT
- PV_INSTANCE_TIME
- PV_OS_RUN_INFO
- PV_REDO_STAT
- PV_SESSION_MEMORY
- PV_SESSION_MEMORY_CONTEXT
- PV_SESSION_MEMORY_DETAIL
- PV_SESSION_STAT
- PV_SESSION_TIME
- PV_THREAD_MEMORY_CONTEXT
- PV_TOTAL_MEMORY_DETAIL
- SYS_DUMMY
-
Schemas
- Information Schema
-
DBE_PERF Schema
- OS
- Instance
- Memory
- File
-
Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
- GLOBAL_STAT_XACT_ALL_TABLES
- STAT_XACT_SYS_TABLES
- SUMMARY_STAT_XACT_SYS_TABLES
- GLOBAL_STAT_XACT_SYS_TABLES
- STAT_XACT_USER_TABLES
- SUMMARY_STAT_XACT_USER_TABLES
- GLOBAL_STAT_XACT_USER_TABLES
- STAT_XACT_USER_FUNCTIONS
- SUMMARY_STAT_XACT_USER_FUNCTIONS
- GLOBAL_STAT_XACT_USER_FUNCTIONS
- STAT_BAD_BLOCK
- SUMMARY_STAT_BAD_BLOCK
- GLOBAL_STAT_BAD_BLOCK
- STAT_USER_FUNCTIONS
- SUMMARY_STAT_USER_FUNCTIONS
- GLOBAL_STAT_USER_FUNCTIONS
- Workload
-
Session and Thread
- SESSION_STAT
- GLOBAL_SESSION_STAT
- SESSION_TIME
- GLOBAL_SESSION_TIME
- SESSION_MEMORY
- GLOBAL_SESSION_MEMORY
- SESSION_MEMORY_DETAIL
- GLOBAL_SESSION_MEMORY_DETAIL
- SESSION_STAT_ACTIVITY
- GLOBAL_SESSION_STAT_ACTIVITY
- THREAD_WAIT_STATUS
- GLOBAL_THREAD_WAIT_STATUS
- LOCAL_THREADPOOL_STATUS
- GLOBAL_THREADPOOL_STATUS
- SESSION_CPU_RUNTIME
- SESSION_MEMORY_RUNTIME
- STATEMENT_IOSTAT_COMPLEX_RUNTIME
- LOCAL_ACTIVE_SESSION
- GLOBAL_ACTIVE_SESSION
- Transaction
-
Query
- STATEMENT
- SUMMARY_STATEMENT
- STATEMENT_COUNT
- GLOBAL_STATEMENT_COUNT
- SUMMARY_STATEMENT_COUNT
- GLOBAL_STATEMENT_COMPLEX_HISTORY
- GLOBAL_STATEMENT_COMPLEX_HISTORY_TABLE
- GLOBAL_STATEMENT_COMPLEX_RUNTIME
- STATEMENT_RESPONSETIME_PERCENTILE
- STATEMENT_COMPLEX_RUNTIME
- STATEMENT_COMPLEX_HISTORY_TABLE
- STATEMENT_COMPLEX_HISTORY
- STATEMENT_WLMSTAT_COMPLEX_RUNTIME
- GS_SLOW_QUERY_INFO (Discarded)
- GS_SLOW_QUERY_HISTORY (Discarded)
- GLOBAL_SLOW_QUERY_HISTORY (Discarded)
- GLOBAL_SLOW_QUERY_INFO (Discarded)
- STATEMENT_HISTORY
-
Cache and I/O
- STATIO_USER_TABLES
- SUMMARY_STATIO_USER_TABLES
- GLOBAL_STATIO_USER_TABLES
- STATIO_USER_INDEXES
- SUMMARY_STATIO_USER_INDEXES
- GLOBAL_STATIO_USER_INDEXES
- STATIO_USER_SEQUENCES
- SUMMARY_STATIO_USER_SEQUENCES
- GLOBAL_STATIO_USER_SEQUENCES
- STATIO_SYS_TABLES
- SUMMARY_STATIO_SYS_TABLES
- GLOBAL_STATIO_SYS_TABLES
- STATIO_SYS_INDEXES
- SUMMARY_STATIO_SYS_INDEXES
- GLOBAL_STATIO_SYS_INDEXES
- STATIO_SYS_SEQUENCES
- SUMMARY_STATIO_SYS_SEQUENCES
- GLOBAL_STATIO_SYS_SEQUENCES
- STATIO_ALL_TABLES
- SUMMARY_STATIO_ALL_TABLES
- GLOBAL_STATIO_ALL_TABLES
- STATIO_ALL_INDEXES
- SUMMARY_STATIO_ALL_INDEXES
- GLOBAL_STATIO_ALL_INDEXES
- STATIO_ALL_SEQUENCES
- SUMMARY_STATIO_ALL_SEQUENCES
- GLOBAL_STATIO_ALL_SEQUENCES
- GLOBAL_STAT_DB_CU
- GLOBAL_STAT_SESSION_CU
- Communication Library
-
Utility
- REPLICATION_STAT
- GLOBAL_REPLICATION_STAT
- REPLICATION_SLOTS
- GLOBAL_REPLICATION_SLOTS
- BGWRITER_STAT
- GLOBAL_BGWRITER_STAT
- POOLER_STATUS
- GLOBAL_COMM_CHECK_CONNECTION_STATUS
- GLOBAL_CKPT_STATUS
- GLOBAL_DOUBLE_WRITE_STATUS
- GLOBAL_PAGEWRITER_STATUS
- GLOBAL_POOLER_STATUS
- GLOBAL_RECORD_RESET_TIME
- GLOBAL_REDO_STATUS
- GLOBAL_RECOVERY_STATUS
- CLASS_VITAL_INFO
- USER_LOGIN
- SUMMARY_USER_LOGIN
- GLOBAL_GET_BGWRITER_STATUS
- GLOBAL_SINGLE_FLUSH_DW_STATUS
- GLOBAL_CANDIDATE_STATUS
- Lock
- Wait Event
- Configuration
- Operator
- Workload Manager
- Global Plan Cache
- RTO & RPO
- WDR Snapshot Schema
- GTM Mode
- Materialized View
-
GUC Parameters
- GUC Parameter Usage
- File Location
- Connection and Authentication
- Resource Consumption
- Parallel Data Import
- Write Ahead Log
- HA Replication
- Query Planning
- Error Reporting and Logging
- Alarm Detection
- Statistics During the Database Running
- Workload Management
- Automatic Vacuuming
- Default Settings of Client Connection
- Lock Management
- Version and Platform Compatibility
- Fault Tolerance
- Connection Pool Parameters
- Cluster Transaction Parameters
- Dual-Cluster Replication Parameters
- Developer Options
- Auditing
- Transaction Monitoring
- CM Parameters
- GTM Parameters
- Upgrade Parameters
- Miscellaneous Parameters
- Wait Event
- Query
- System Performance Snapshot
- Security Configuration
- HyperLogLog
- User-defined Functions
- Collaborative Analysis
- Acceleration Cluster
- Scheduled Task
- Thread Pool
- Full Text Search
- Backup and Restoration
- AI Features
- Global SysCache Parameters
- Reserved Parameters
- Error Log Reference
-
API Reference
-
JDBC Interface Reference
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- PGReplicationConnection
- PGReplicationStream
- ChainedStreamBuilder
- ChainedCommonStreamBuilder
- ODBC Interface Reference
- libpq Interface Reference
- Psycopg API Reference
-
JDBC Interface Reference
-
Developer Guide(Centralized_2.x)
- Overview
- Working with Databases
- Development and Design Proposal
- Best Practices
-
Application Development Guide
- Development Specifications
- Obtaining the Driver Package
-
Development Based on JDBC
- JDBC Package, Driver Class, and Environment Class
- Development Process
- Loading the Driver
- Connecting to a Database
- Connecting to the Database (Using SSL)
- Connecting to a Database (Using UDS)
- Running SQL Statements
- Processing Data in a Result Set
- Closing a Connection
- Log Management
- Examples: Common Operations
- Example: Retrying SQL Queries for Applications
- Example: Importing and Exporting Data Through Local Files
- Example: Migrating Data from MY
- Example: Logic Replication Code
- Example: Parameters for Connecting to the Database in Different Scenarios
- JDBC API Reference
- Development Based on ODBC
- Development Based on libpq
- Psycopg-based Development
- Development Based on the Go Driver
- Database Security Management
-
API Reference
-
JDBC
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- PGReplicationConnection
- PGReplicationStream
- ChainedStreamBuilder
- ChainedCommonStreamBuilder
-
ODBC
- SQLAllocEnv
- SQLAllocConnect
- SQLAllocHandle
- SQLAllocStmt
- SQLBindCol
- SQLBindParameter
- SQLColAttribute
- SQLConnect
- SQLDisconnect
- SQLExecDirect
- SQLExecute
- SQLFetch
- SQLFreeStmt
- SQLFreeConnect
- SQLFreeHandle
- SQLFreeEnv
- SQLPrepare
- SQLGetData
- SQLGetDiagRec
- SQLSetConnectAttr
- SQLSetEnvAttr
- SQLSetStmtAttr
- Examples
- libpq
- Psycopg
- Go
-
JDBC
- Importing Data
-
Performance Tuning
- Performance Tuning Process
- Determining the Scope of Performance Tuning
-
SQL Optimization
- Query Execution Process
- Introduction to the SQL Execution Plan
- Tuning Process
- Updating Statistics
- Reviewing and Modifying a Table Definition
- Typical SQL Optimization Methods
- Experience in Rewriting SQL Statements
- Resetting Key Parameters During SQL Tuning
-
Hint-based Tuning
- Plan Hint Optimization
- Join Order Hints
- Join Operation Hints
- Rows Hints
- Scan Operation Hints
- Sublink Name Hints
- Hint Errors, Conflicts, and Other Warnings
- Optimizer GUC Parameter Hints
- Hint for Selecting the Custom Plan or Generic Plan
- Hint Specifying Not to Expand Subqueries
- Hint Specifying Not to Use Global Plan Cache
- Hint of Parameterized Paths at the Same Level
- Hint for Materializing a Sub-plan Result
- Using the Vectorized Executor for Tuning
-
Optimization Cases
- Case: Modifying the GUC Parameter rewrite_rule
- Case: Adjusting I/O Parameters to Reduce the Log Bloat Rate
- Case: Creating an Appropriate Index
- Case: Adding NOT NULL for JOIN Columns
- Case: Modifying a Partitioned Table
- Case: Rewriting SQL and Deleting Subqueries (1)
- Case: Rewriting SQL and Deleting Subqueries (2)
- Case: Rewriting SQL Statements and Deleting in-clause
- Configuring Running Parameters
-
SQL Reference
- SQL
- Keywords
- Data Types
- Constant and Macro
-
Functions and Operators
- Logical Operators
- Comparison Operators
- Character Processing Functions and Operators
- Binary String Functions and Operators
- Bit String Functions and Operators
- Mode Matching Operators
- Mathematical Functions and Operators
- Date and Time Processing Functions and Operators
- Type Conversion Functions
- Geometric Functions and Operators
- Network Address Functions and Operators
- Text Search Functions and Operators
- JSON/JSONB Functions and Operators
- HLL Functions and Operators
- SEQUENCE Functions
- Array Functions and Operators
- Range Functions and Operators
- Aggregate Functions
- Window Functions
- Security Functions
- Ledger Database Functions
- Encrypted Equality Functions
- Set Returning Functions
- Conditional Expression Functions
- System Information Functions
-
System Administration Functions
- Configuration Settings Functions
- Universal File Access Functions
- Server Signal Functions
- Backup and Restoration Control Functions
- DR Control Functions for Dual Database Instances
- DR Query Functions for Dual-Database Instances
- Snapshot Synchronization Functions
- Database Object Functions
- Advisory Lock Functions
- Logical Replication Functions
- Segment-Page Storage Functions
- Other Functions
- Undo System Functions
- Statistics Information Functions
- Trigger Functions
- Hash Function
- Prompt Message Function
- Global Temporary Table Functions
- Fault Injection System Function
- Dynamic Data Masking Functions
- Hierarchical Recursion Query Functions
- Other System Functions
- Internal Functions
- Global SysCache Feature Functions
- Data Damage Detection and Repair Functions
- Obsolete Functions
- Expressions
- Type Conversion
- Full Text Search
- System Operation
- Controlling Transactions
- DDL Syntax Overview
- DML Syntax Overview
- DCL Syntax Overview
-
SQL Syntax
- ABORT
- ALTER AGGREGATE
- ALTER AUDIT POLICY
- ALTER DATABASE
- ALTER DATA SOURCE
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER EXTENSION
- ALTER FOREIGN TABLE
- ALTER FUNCTION
- ALTER GLOBAL CONFIGURATION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER LARGE OBJECT
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER OPERATOR
- ALTER PUBLICATION
- ALTER PACKAGE
- ALTER PROCEDURE
- ALTER RESOURCE LABEL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SUBSCRIPTION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLE SUBPARTITION
- ALTER TABLESPACE
- ALTER TEXT SEARCH CONFIGURATION
- ALTER TEXT SEARCH DICTIONARY
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER USER MAPPING
- ALTER VIEW
- ANALYZE | ANALYSE
- BEGIN
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- COPY
- CREATE AGGREGATE
- CREATE AUDIT POLICY
- CREATE CAST
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE CONVERSION
- CREATE DATABASE
- CREATE DATA SOURCE
- CREATE DIRECTORY
- CREATE EXTENSION
- CREATE FOREIGN TABLE
- CREATE FUNCTION
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE OPERATOR
- CREATE PACKAGE
- CREATE PROCEDURE
- CREATE PUBLICATION
- CREATE RESOURCE LABEL
- CREATE ROLE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE RULE
- CREATE SCHEMA
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SUBSCRIPTION
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TABLESPACE
- CREATE TABLE SUBPARTITION
- CREATE TEXT SEARCH CONFIGURATION
- CREATE TEXT SEARCH DICTIONARY
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE USER MAPPING
- CREATE VIEW
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
- DEALLOCATE
- DECLARE
- DELETE
- DO
- DROP AGGREGATE
- DROP AUDIT POLICY
- DROP CAST
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATA SOURCE
- DROP DIRECTORY
- DROP EXTENSION
- DROP FOREIGN TABLE
- DROP FUNCTION
- DROP GLOBAL CONFIGURATION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP OPERATOR
- DROP OWNED
- DROP PACKAGE
- DROP PROCEDURE
- DROP RESOURCE LABEL
- DROP ROLE
- DROP ROW LEVEL SECURITY POLICY
- DROP RULE
- DROP PUBLICATION
- DROP SCHEMA
- DROP SEQUENCE
- DROP SERVER
- DROP SUBSCRIPTION
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TEXT SEARCH CONFIGURATION
- DROP TEXT SEARCH DICTIONARY
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP USER MAPPING
- DROP VIEW
- DROP WEAK PASSWORD DICTIONARY
- EXECUTE
- EXPLAIN
- EXPLAIN PLAN
- FETCH
- GRANT
- INSERT
- LOCK
- MERGE INTO
- MOVE
- PREDICT BY
- PREPARE
- PREPARE TRANSACTION
- PURGE
- REASSIGN OWNED
- REFRESH INCREMENTAL MATERIALIZED VIEW
- REFRESH MATERIALIZED VIEW
- REINDEX
- RELEASE SAVEPOINT
- RESET
- REVOKE
- ROLLBACK
- ROLLBACK PREPARED
- ROLLBACK TO SAVEPOINT
- SAVEPOINT
- SELECT
- SELECT INTO
- SET
- SET CONSTRAINTS
- SET ROLE
- SET SESSION AUTHORIZATION
- SET TRANSACTION
- SHOW
- SHUTDOWN
- SNAPSHOT
- START TRANSACTION
- TIMECAPSULE TABLE
- TRUNCATE
- UPDATE
- VACUUM
- VALUES
- Appendix
- Stored Procedure
-
System Catalogs and System Views
- Overview of System Catalogs and System Views
-
System Catalogs
- GS_ASP
- GS_AUDITING_POLICY
- GS_AUDITING_POLICY_ACCESS
- GS_AUDITING_POLICY_FILTERS
- GS_AUDITING_POLICY_PRIVILEGES
- GS_CLIENT_GLOBAL_KEYS
- GS_CLIENT_GLOBAL_KEYS_ARGS
- GS_COLUMN_KEYS
- GS_COLUMN_KEYS_ARGS
- GS_DB_PRIVILEGE
- GS_ENCRYPTED_COLUMNS
- GS_ENCRYPTED_PROC
- GS_GLOBAL_CHAIN
- GS_GLOBAL_CONFIG
- GS_JOB_ARGUMENT
- GS_JOB_ATTRIBUTE
- GS_MASKING_POLICY
- GS_MASKING_POLICY_ACTIONS
- GS_MASKING_POLICY_FILTERS
- GS_MATVIEW
- GS_MATVIEW_DEPENDENCY
- GS_MODEL_WAREHOUSE
- GS_OPT_MODEL
- GS_PACKAGE
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_SQL_PATCH
- GS_TXN_SNAPSHOT
- GS_UID
- GS_WLM_EC_OPERATOR_INFO
- GS_WLM_INSTANCE_HISTORY
- GS_WLM_OPERATOR_INFO
- GS_WLM_PLAN_ENCODING_TABLE
- GS_WLM_PLAN_OPERATOR_INFO
- GS_WLM_SESSION_QUERY_INFO_ALL
- GS_WLM_USER_RESOURCE_HISTORY
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_APP_WORKLOADGROUP_MAPPING
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_AUTHID
- PG_AUTH_HISTORY
- PG_AUTH_MEMBERS
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DB_ROLE_SETTING
- PG_DEFAULT_ACL
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EXTENSION
- PG_EXTENSION_DATA_SOURCE
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_FOREIGN_TABLE
- PG_HASHBUCKET
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OBSSCANINFO
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PARTITION
- PG_PLTEMPLATE
- PG_PROC
- PG_PUBLICATION
- PG_PUBLICATION_REL
- PG_RANGE
- PG_REPLICATION_ORIGIN
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_RLSPOLICY
- PG_SECLABEL
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_SHSECLABEL
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SUBSCRIPTION
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PG_USER_MAPPING
- PG_USER_STATUS
- PG_WORKLOAD_GROUP
- PGXC_CLASS
- PGXC_GROUP
- PGXC_NODE
- PGXC_SLICE
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- STREAMING_STREAM
- STREAMING_CONT_QUERY
- STREAMING_REAPER_STATUS
-
System Views
- ADM_COL_COMMENTS
- ADM_CONSTRAINTS
- ADM_CONS_COLUMNS
- ADM_DATA_FILES
- ADM_HIST_SNAPSHOT
- ADM_HIST_SQL_PLAN
- ADM_HIST_SQLSTAT
- ADM_INDEXES
- ADM_IND_COLUMNS
- ADM_IND_EXPRESSIONS
- ADM_IND_PARTITIONS
- ADM_IND_SUBPARTITIONS
- ADM_PART_INDEXES
- ADM_OBJECTS
- ADM_PART_TABLES
- ADM_PROCEDURES
- ADM_SCHEDULER_JOBS
- ADM_SEQUENCES
- ADM_SOURCE
- ADM_SYNONYMS
- ADM_TAB_SUBPARTITIONS
- ADM_TABLES
- ADM_TABLESPACES
- ADM_TAB_COLUMNS
- ADM_TAB_COMMENTS
- ADM_TAB_PARTITIONS
- ADM_TRIGGERS
- ADM_TYPE_ATTRS
- ADM_USERS
- ADM_VIEWS
- DB_ALL_TABLES
- DB_COL_COMMENTS
- DB_CONSTRAINTS
- DB_CONS_COLUMNS
- DB_DEPENDENCIES
- DB_IND_COLUMNS
- DB_IND_EXPRESSIONS
- DB_IND_PARTITIONS
- DB_IND_SUBPARTITIONS
- DB_INDEXES
- DB_OBJECTS
- DB_PROCEDURES
- DB_PART_INDEXES
- DB_PART_TABLES
- DB_SEQUENCES
- DB_SOURCE
- DB_SYNONYMS
- DB_TAB_PARTITIONS
- DB_TAB_SUBPARTITIONS
- DB_TAB_COLUMNS
- DB_TAB_COMMENTS
- DB_TABLES
- DB_TRIGGERS
- DB_USERS
- DB_VIEWS
- DV_SESSIONS
- DV_SESSION_LONGOPS
- GET_GLOBAL_PREPARED_XACTS (Discarded)
- GS_ALL_CONTROL_GROUP_INFO
- GS_AUDITING
- GS_AUDITING_ACCESS
- GS_AUDITING_PRIVILEGE
- GS_CLUSTER_RESOURCE_INFO
- GS_COMM_PROXY_THREAD_STATUS
- GS_DB_PRIVILEGES
- GS_FILE_STAT
- GS_GET_CONTROL_GROUP_INFO
- GS_GSC_MEMORY_DETAIL
- GS_INSTANCE_TIME
- GS_LABELS
- GS_LSC_MEMORY_DETAIL
- GS_MASKING
- GS_MATVIEWS
- GS_OS_RUN_INFO
- GS_REDO_STAT
- GS_SESSION_CPU_STATISTICS
- GS_SESSION_MEMORY
- GS_SESSION_MEMORY_CONTEXT
- GS_SESSION_MEMORY_DETAIL
- GS_SESSION_MEMORY_STATISTICS
- GS_SESSION_STAT
- GS_SESSION_TIME
- GS_SQL_COUNT
- GS_STAT_SESSION_CU
- GS_THREAD_MEMORY_CONTEXT
- GS_TOTAL_MEMORY_DETAIL
- GS_TOTAL_NODEGROUP_MEMORY_DETAIL
- GS_WLM_CGROUP_INFO
- GS_WLM_EC_OPERATOR_STATISTICS
- GS_WLM_OPERATOR_HISTORY
- GS_WLM_OPERATOR_STATISTICS
- GS_WLM_PLAN_OPERATOR_HISTORY
- GS_WLM_REBUILD_USER_RESOURCE_POOL
- GS_WLM_RESOURCE_POOL
- GS_WLM_SESSION_HISTORY
- GS_WLM_SESSION_INFO
- GS_WLM_SESSION_INFO_ALL
- GS_WLM_SESSION_STATISTICS
- GS_WLM_USER_INFO
- GS_WLM_WORKLOAD_RECORDS
- GV_SESSION
- MPP_TABLES
- MY_COL_COMMENTS
- MY_CONSTRAINTS
- MY_CONS_COLUMNS
- MY_INDEXES
- MY_IND_COLUMNS
- MY_IND_EXPRESSIONS
- MY_IND_PARTITIONS
- MY_IND_SUBPARTITIONS
- MY_JOBS
- MY_OBJECTS
- MY_PART_INDEXES
- MY_PART_TABLES
- MY_PROCEDURES
- MY_SEQUENCES
- MY_SOURCE
- MY_SYNONYMS
- MY_TAB_COLUMNS
- MY_TAB_COMMENTS
- MY_TAB_PARTITIONS
- MY_TAB_SUBPARTITIONS
- MY_TABLES
- MY_TRIGGERS
- MY_VIEWS
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_AVAILABLE_EXTENSIONS
- PG_CURSORS
- PG_COMM_DELAY
- PG_COMM_RECV_STREAM
- PG_COMM_SEND_STREAM
- PG_COMM_STATUS
- PG_CONTROL_GROUP_CONFIG
- PG_EXT_STATS
- PG_GET_INVALID_BACKENDS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_GTT_RELSTATS
- PG_GTT_STATS
- PG_GTT_ATTACHED_PIDS
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_PUBLICATION_TABLES
- PG_REPLICATION_ORIGIN_STATUS
- PG_REPLICATION_SLOTS
- PG_RLSPOLICIES
- PG_ROLES
- PG_RULES
- PG_RUNNING_XACTS
- PG_SECLABELS
- PG_SESSION_IOSTAT
- PG_SESSION_WLMSTAT
- PG_SETTINGS
- PG_SHADOW
- PG_STATS
- PG_STAT_ACTIVITY
- PG_STAT_ACTIVITY_NG
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_REPLICATION
- PG_STAT_SUBSCRIPTION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_TABLES
- PG_TDE_INFO
- PG_THREAD_WAIT_STATUS
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_USER
- PG_USER_MAPPINGS
- PG_VIEWS
- PG_VARIABLE_INFO
- PG_WLM_STATISTICS
- PGXC_PREPARED_XACTS
- PGXC_THREAD_WAIT_STATUS
- PLAN_TABLE
- SYS_DUMMY
-
Schemas
-
DBE_PERF Schema
- OS
- Instance
- Memory
- File
-
Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
- GLOBAL_STAT_XACT_ALL_TABLES
- STAT_XACT_SYS_TABLES
- SUMMARY_STAT_XACT_SYS_TABLES
- GLOBAL_STAT_XACT_SYS_TABLES
- STAT_XACT_USER_TABLES
- SUMMARY_STAT_XACT_USER_TABLES
- GLOBAL_STAT_XACT_USER_TABLES
- STAT_XACT_USER_FUNCTIONS
- SUMMARY_STAT_XACT_USER_FUNCTIONS
- GLOBAL_STAT_XACT_USER_FUNCTIONS
- STAT_BAD_BLOCK
- SUMMARY_STAT_BAD_BLOCK
- GLOBAL_STAT_BAD_BLOCK
- STAT_USER_FUNCTIONS
- SUMMARY_STAT_USER_FUNCTIONS
- GLOBAL_STAT_USER_FUNCTIONS
- Workload
-
Session/Thread
- SESSION_STAT
- GLOBAL_SESSION_STAT
- SESSION_TIME
- GLOBAL_SESSION_TIME
- SESSION_MEMORY
- GLOBAL_SESSION_MEMORY
- SESSION_MEMORY_DETAIL
- GLOBAL_SESSION_MEMORY_DETAIL
- SESSION_STAT_ACTIVITY
- GLOBAL_SESSION_STAT_ACTIVITY
- THREAD_WAIT_STATUS
- GLOBAL_THREAD_WAIT_STATUS
- LOCAL_THREADPOOL_STATUS
- GLOBAL_THREADPOOL_STATUS
- SESSION_CPU_RUNTIME
- SESSION_MEMORY_RUNTIME
- STATEMENT_IOSTAT_COMPLEX_RUNTIME
- LOCAL_ACTIVE_SESSION
- Transaction
-
Query
- STATEMENT
- SUMMARY_STATEMENT
- STATEMENT_COUNT
- GLOBAL_STATEMENT_COUNT
- SUMMARY_STATEMENT_COUNT
- GLOBAL_STATEMENT_COMPLEX_HISTORY
- GLOBAL_STATEMENT_COMPLEX_HISTORY_TABLE
- GLOBAL_STATEMENT_COMPLEX_RUNTIME
- STATEMENT_RESPONSETIME_PERCENTILE
- STATEMENT_COMPLEX_RUNTIME
- STATEMENT_COMPLEX_HISTORY_TABLE
- STATEMENT_COMPLEX_HISTORY
- STATEMENT_WLMSTAT_COMPLEX_RUNTIME
- STATEMENT_HISTORY
- GS_SLOW_QUERY_INFO (Discarded)
- GS_SLOW_QUERY_HISTORY (Discarded)
- GLOBAL_SLOW_QUERY_HISTORY (Discarded)
- GLOBAL_SLOW_QUERY_INFO (Discarded)
-
Cache/IO
- STATIO_USER_TABLES
- SUMMARY_STATIO_USER_TABLES
- GLOBAL_STATIO_USER_TABLES
- STATIO_USER_INDEXES
- SUMMARY_STATIO_USER_INDEXES
- GLOBAL_STATIO_USER_INDEXES
- STATIO_USER_SEQUENCES
- SUMMARY_STATIO_USER_SEQUENCES
- GLOBAL_STATIO_USER_SEQUENCES
- STATIO_SYS_TABLES
- SUMMARY_STATIO_SYS_TABLES
- GLOBAL_STATIO_SYS_TABLES
- STATIO_SYS_INDEXES
- SUMMARY_STATIO_SYS_INDEXES
- GLOBAL_STATIO_SYS_INDEXES
- STATIO_SYS_SEQUENCES
- SUMMARY_STATIO_SYS_SEQUENCES
- GLOBAL_STATIO_SYS_SEQUENCES
- STATIO_ALL_TABLES
- SUMMARY_STATIO_ALL_TABLES
- GLOBAL_STATIO_ALL_TABLES
- STATIO_ALL_INDEXES
- SUMMARY_STATIO_ALL_INDEXES
- GLOBAL_STATIO_ALL_INDEXES
- STATIO_ALL_SEQUENCES
- SUMMARY_STATIO_ALL_SEQUENCES
- GLOBAL_STATIO_ALL_SEQUENCES
- GLOBAL_STAT_DB_CU
- GLOBAL_STAT_SESSION_CU
-
Utility
- REPLICATION_STAT
- GLOBAL_REPLICATION_STAT
- REPLICATION_SLOTS
- GLOBAL_REPLICATION_SLOTS
- BGWRITER_STAT
- GLOBAL_BGWRITER_STAT
- GLOBAL_CKPT_STATUS
- GLOBAL_DOUBLE_WRITE_STATUS
- GLOBAL_PAGEWRITER_STATUS
- GLOBAL_RECORD_RESET_TIME
- GLOBAL_REDO_STATUS
- GLOBAL_RECOVERY_STATUS
- CLASS_VITAL_INFO
- USER_LOGIN
- SUMMARY_USER_LOGIN
- GLOBAL_SINGLE_FLUSH_DW_STATUS
- GLOBAL_CANDIDATE_STATUS
- Lock
- Wait Events
- Configuration
- Operator
- Workload Manager
- Global Plancache
- RTO & RPO
- WDR Snapshot Schema
-
DBE_PLDEBUGGER Schema
- DBE_PLDEBUGGER.turn_on
- DBE_PLDEBUGGER.turn_off
- DBE_PLDEBUGGER.local_debug_server_info
- DBE_PLDEBUGGER.attach
- DBE_PLDEBUGGER.info_locals
- DBE_PLDEBUGGER.next
- DBE_PLDEBUGGER.continue
- DBE_PLDEBUGGER.abort
- DBE_PLDEBUGGER.print_var
- DBE_PLDEBUGGER.info_code
- DBE_PLDEBUGGER.step
- DBE_PLDEBUGGER.add_breakpoint
- DBE_PLDEBUGGER.delete_breakpoint
- DBE_PLDEBUGGER.info_breakpoints
- DBE_PLDEBUGGER.backtrace
- DBE_PLDEBUGGER.enable_breakpoint
- DBE_PLDEBUGGER.disable_breakpoint
- DBE_PLDEBUGGER.finish
- DBE_PLDEBUGGER.set_var
- DBE_SQL_UTIL Schema
-
DBE_PERF Schema
- Logical Replication
- Materialized View
-
GUC Parameters
- GUC Parameter Usage
- File Location
- Connection and Authentication
- Resource Consumption
- Write Ahead Log
- HA Replication
- Query Planning
- Error Reporting and Logging
- Alarm Detection
- Statistics During the Database Running
- Workload Management
- Automatic Vacuuming
- Default Settings of Client Connection
- Lock Management
- Version and Platform Compatibility
- Fault Tolerance
- Connection Pool Parameters
- Transaction
- Replication Parameters of Two Database Instances
- Developer Options
- Auditing
- CM Parameters
- Upgrade Parameters
- Miscellaneous Parameters
- Wait Events
- Query
- System Performance Snapshot
- Security Configuration
- Global Temporary Table
- HyperLogLog
- User-defined Functions
- Scheduled Task
- Thread Pool
- Backup and Restoration
- Undo
- DCF Parameters Settings
- Flashback
- Rollback Parameters
- Reserved Parameters
- Global SysCache Parameters
- Error Log Reference
-
Developer Guide(Distributed_8.x)
- Tool Guide
-
Feature Guide
-
Feature Guide(Distributed_8.x)
- Materialized View
- Setting Encrypted Equality Queries
-
Partitioned Table
- Large-Capacity Database
- Introduction to Partitioned Tables
- Partitioned Table Query Optimization
- Partitioned Table O&M Management
- System Views & DFX Related to Partitioned Tables
- Storage Engine
- FDW
- Logical Replication
-
Feature Guide(Centralized_8.x)
- Materialized View
- Setting Encrypted Equality Query
-
Partitioned Table
- Large-Capacity Database
- Introduction to Partitioned Tables
- Partitioned Table Query Optimization
- Automatic Partitioning
- Partitioned Table O&M Management
- Partition Concurrency Control
- System Views & DFX Related to Partitioned Tables
- Storage Engine
- Foreign Data Wrapper
- Logical Replication
-
Feature Guide(Distributed_3.x)
- Materialized View
- Setting Encrypted Equality Queries
-
Partitioned Table
- Large-Capacity Database
- Introduction to Partitioned Tables
- Partitioned Table Query Optimization
- Partitioned Table O&M Management
- System Views & DFX Related to Partitioned Tables
- Storage Engine
- FDW
- Logical Replication
-
Feature Guide(Centralized_3.x)
- Materialized View
- Setting Encrypted Equality Query
-
Partitioned Table
- Large-Capacity Database
- Introduction to Partitioned Tables
- Partitioned Table Query Optimization
- Partitioned Table O&M Management
- Partition Concurrency Control
- System Views & DFX Related to Partitioned Tables
- Storage Engine
- Foreign Data Wrapper
- Logical Replication
-
Feature Guide(Distributed_8.x)
- Best Practices
- Performance White Paper
-
API Reference
- Before You Start
- API Overview
- Calling APIs
-
APIs (Recommended)
- DB Engine Versions and Specifications
- Storage Management
-
Instance Management
- Creating a DB Instance (v3.2)
- Creating a DB Instance (v5)
- Adding CNs and DN Shards and Scaling Up Storage
- Deleting a DB Instance
- Querying DB Instances
- Resetting a Database Password
- Changing a DB Instance Name
- Rebooting a DB Instance
- Switching Roles of the Primary and Standby DNs in Shards
- Querying the Components of a DB Instance
- Changing the vCPUs and Memory of a DB Instance
- Checking Whether Host Load Is Unbalanced Due to a Primary/Standby Switchover
- Querying Solution Template Settings
- Querying EIPs Bound to a DB Instance
- Validating Password Strength
- Binding or Unbinding an EIP
- Querying the SSL Certificate Download Address of a DB Instance
- Querying the Instance Quotas of a Tenant
- Starting a DB Instance or Node
- Stopping a DB Instance or Node
- Enabling M Compatibility Port
- Changing or Disabling M Compatibility Port
- Querying the Top I/O Threads
- Querying CNs
- Querying Storage Autoscaling Policies of a DB Instance
- Querying Advanced Features
- Enabling or Disabling Advanced Features
-
Parameter Configuration
- Obtaining Parameter Templates
- Obtaining the Parameters of a Specified DB Instance
- Modifying Parameters of a Specified DB Instance
- Creating a Parameter Template
- Deleting a Parameter Template
- Querying Details About a Parameter Template
- Replicating a Parameter Template
- Resetting a Parameter Template
- Obtaining the Differences of Two Parameter Templates
- Querying Instances That a Parameter Template Can Be Applied To
- Checking Whether the Parameter Template Name Exists
- Applying a Parameter Template
- Querying Application Records of a Parameter Template
- Querying Change History of a Parameter Template
- Version Upgrade
-
Backup and Restoration
- Configuring an Automated Backup Policy
- Querying an Automated Backup Policy
- Querying Backups
- Creating a Manual Backup
- Stopping a Backup
- Deleting a Manual Backup
- Querying the Restoration Time Range
- Restoring Data to a New instance
- Querying Instances That Can Be Used for Backups and Restorations
- Querying Information About the Original Instance Based on a Specific Point of Time or a Backup File
- Restoring Data to the Original or Existing Instance
- Confirming Data Integrity After a Backup Is Restored
- Log Management
- SQL Throttling
-
Database and Account Management
- Creating a Database
- Creating a Database Account
- Creating a Database Schema
- Configuring Permissions of Database Accounts
- Resetting a Password for a Database Account
- Querying Databases
- Querying Database Users
- Querying Database Schemas
- Deleting a Database
- Deleting a Schema
- Creating a Database Role
- Querying Database Roles
- Configuring Permissions of a Database Role
- Tag Management
- Quota Management
- Task Management
- Recycle Bin
- Plug-in Management
- Historical APIs
- Permissions Policies and Supported Actions
- Appendix
- SDK Reference
-
FAQs
-
About GaussDB
- What Should I Pay Attention to When Using GaussDB?
- What Is the Availability of GaussDB Instances?
- Will My GaussDB Instances Be Affected by Other Users' Instances?
- What Can I Do About Slow Responses of Websites When They Use GaussDB?
- Can Multiple ECSs Connect to the Same GaussDB Instance?
- Can I Encrypt the Disk After Purchasing a GaussDB Instance?
- Will Backups Be Encrypted After Disk Encryption Is Enabled for My GaussDB Instance?
- Will Different GaussDB Instances Share CPU and Memory Resources?
- How Many Databases Can Run on a GaussDB Instance?
- What Is the Relationship Between GaussDB and PostgreSQL?
- Can Multiple Users Log In to a GaussDB Instance Through DAS at the Same Time? Will the Accounts Be Locked If I Enter Wrong Passwords Several Times in a Row?
- What Are the Differences Between the Independent Deployment Model and Combined Deployment Model of GaussDB Distributed Instances?
- What Are the Differences Between the General-Purpose, Dedicated, and Kunpeng Dedicated Specification Types Provided GaussDB?
- Can I Switch Between the GaussDB Enterprise Edition and Basic Edition?
- GaussDB Resource Freezing, Unfreezing, Release, Deletion, and Unsubscription
- Resource and Disk Management
-
Database Connections
- What Should I Do If I Can't Connect to My GaussDB Instance?
- Can an External Server Access GaussDB Instances?
- Do Applications Need to Support Automatic Reconnections to GaussDB Databases?
- Why Can't I Ping My EIP After It Is Bound to a GaussDB Instance?
- Can I Access a GaussDB Instance Over an Intranet Connection Across Regions?
- Database Storage
-
Database Usage
- How Do I Use DAS to Query SQL Statements Executed in GaussDB?
- What Should I Do If Garbled Characters Are Displayed After SQL Query Results Are Exported to an Excel File for My GaussDB Instance?
- What Do I Do If the root Account of My GaussDB Instance Is Locked?
- Why Did the New Password Not Take Effect After I Reset the Administrator Password of a GaussDB Instance?
- What Do I Do If Replay Speed of Standby DNs Cannot Catch Up with Write Speed of Primary DN?
- Can I Change the VPC to Which My GaussDB Instance Belongs?
-
Backup and Restoration
- How Long Does GaussDB Store Backup Data?
- How Do I Clear GaussDB Backup Space?
- Can My GaussDB Instance Still Be Used in the Backup Window?
- How Is GaussDB Backup Data Billed?
- How Can I Back Up a GaussDB Database to an ECS?
- Will Backups Be Retained After My GaussDB Instance Is Deleted?
- Why Does Automated Backup for a GaussDB Instance Fail?
- Why Is Data Table Lost or Data Deleted from My GaussDB Instance?
- Does GaussDB Support Restoring Data for Individual Tables?
- How Can I Delete the GaussDB Backup Policy?
- Database Monitoring
- Scaling and Specification Change
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Database Parameter Modification
- How Can I Change the Time Zone of a GaussDB Instance?
- How Can I Configure a Password Expiration Policy?
- Can I Use SQL Commands in GaussDB to Modify Global Parameters?
- Can I Enable SELECT Operation Auditing in GaussDB?
- How Do I Set the Disk Usage Threshold for Putting a Database Node into Read-Only Mode in GaussDB?
- How Do I Set the Date and Time Display Format in GaussDB?
- How Do I Set the Time Zone Used for Displaying and Interpreting Timestamps in GaussDB?
- How Do I Change the Maximum Number of DN Connections Allowed in GaussDB?
- How Do I Enable the Audit of INSERT, UPDATE, and DELETE Operations in GaussDB?
- How Do I Set the Maximum Number of WAL Sender Threads That Can Be Created in GaussDB?
- How Do I Set the Maximum Number of Bytes to Be Logged for Each SQL Statement in GaussDB?
- How Do I Set the Connection Timeout Interval for GaussDB?
- How Do I Set the Automatic Unlocking Time After an Account Is Locked in GaussDB?
- How Do I Set the Maximum Number of Failed Login Attempts for Accounts in GaussDB?
- Log Management
- Network Security
-
About GaussDB
-
Compatibility
- Oracle Compatibility(Distributed)
- Oracle Compatibility(Centralized)
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MySQL Compatibility(Distributed)
- Overview
- MySQL Compatibility in MySQL-Compatible Mode
- MySQL Compatibility in M-compatible Mode
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MySQL Compatibility(Centralized)
- Introduction
- MySQL Compatibility in B-Compatible Mode
- MySQL Compatibility in M-Compatible Mode
- Videos
- General Reference
- instr_unique_sql_count
- instr_unique_sql_track_type
- enable_instr_rt_percentile
- percentile
- instr_rt_percentile_interval
- enable_instr_cpu_timer
- enable_stmt_track
- track_stmt_parameter
- track_stmt_session_slot
- track_stmt_details_size
- track_stmt_retention_time
- track_stmt_stat_level
- enable_auto_clean_unique_sql
- asp_log_directory
- enable_slow_query_log (Discarded)
- query_log_file (Discarded)
- query_log_directory (Discarded)
- perf_directory
- unique_sql_retention_time
- track_stmt_standby_chain_size
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Query
instr_unique_sql_count
Parameter description: Specifies the maximum number of Unique SQL records to be collected. The value 0 indicates that the function of collecting Unique SQL information is disabled.
If the value is changed from a larger one to a smaller one, the original data in the system will be cleared and re-collected (the standby node does not support this function). There is no impact if the value is changed from a smaller one to a larger one.
When the number of unique SQL records generated in the system (to view the statistics, query dbe_perf.statement or dbe_perf.summary_statement) is greater than the value of instr_unique_sql_count, the extra unique SQL records are not collected.
In the x86-based centralized deployment scenario, the hardware configuration specifications are 32-core CPU and 256 GB memory. When the Benchmark SQL 5.0 tool is used to test performance, the performance fluctuates by about 3% by enabling or disabling this parameter.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: an integer ranging from 0 to 2147483647
Default value: 200000
instr_unique_sql_track_type
Parameter description: Specifies which SQL statements are recorded in Unique SQL.
This parameter is a USERSET parameter. Set it based on instructions provided in Table 1.
- top: Only top-level SQL statements are recorded.
- all: All SQL statements are recorded.
Default value: top
enable_instr_rt_percentile
Parameter description: Specifies whether to enable the function of calculating the response time of 80% and 95% SQL statements in the system.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: Boolean
- on indicates that the function is enabled.
- off indicates that the function is disabled.
Default value: on
percentile
Parameter description: Specifies the percentage of SQL statements whose response time is to be calculated by the background calculation thread.
This parameter is an INTERNAL parameter. Set it based on instructions provided in Table 1.
Value range: a string
Default value: 80, 95
instr_rt_percentile_interval
Parameter description: Specifies the interval at which the background calculation thread calculates the SQL response time.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: an integer ranging from 0 to 3600. The unit is s.
Default value: 10s
enable_instr_cpu_timer
Parameter description: Specifies whether to capture the CPU time consumed during SQL statement execution.
In the x86-based centralized deployment scenario, the hardware configuration specifications are 32-core CPU and 256 GB memory. When the Benchmark SQL 5.0 tool is used to test performance, the performance fluctuates by about 3.5% by enabling or disabling this parameter.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: Boolean
- on indicates the CPU time consumed during SQL statement execution is captured.
- off indicates the CPU time consumed during SQL statement execution is not captured.
Default value: on
enable_stmt_track
Parameter description: Specifies whether to enable the full/slow SQL statement feature.
In the x86-based centralized deployment scenario, the hardware configuration specifications are 32-core CPU and 256 GB memory. When the Benchmark SQL 5.0 tool is used to test performance, the performance fluctuates by about 1.2% by enabling or disabling this parameter.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: Boolean
- on: Full/Slow SQL capture is enabled.
- off: Full /Slow SQL capture is disabled.
Default value: on
track_stmt_parameter
Parameter description: After track_stmt_parameter is enabled, the executed statements recorded in statement_history are not normalized. The complete SQL statement information can be displayed to help the database administrator locate problems. For a simple query, the complete statement information is displayed. For a PBE statement, the complete statement information and information about each variable value are displayed. The format is "query string; parameters:$1=value1,$2=value2, ..." This parameter is used to display complete SQL information and is not controlled by the track_activity_query_size parameter.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: Boolean
- on: The function of displaying complete SQL statement information is enabled.
- off: The function of displaying complete SQL statement information is disabled.
Default value: off
track_stmt_session_slot
Parameter description: Specifies the maximum number of full/slow SQL statements that can be cached in a session. If the number of full/slow SQL statements exceeds this value, new statements will not be traced until the flush thread flushes the cached statements to the disk to reserve idle space.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: an integer ranging from 0 to 2147483647
Default value: 1000
track_stmt_details_size
Parameter description: Specifies the maximum size of execution events that can be collected by a single statement.
This parameter is a USERSET parameter. Set it based on instructions provided in Table 1.
Value range: an integer ranging from 0 to 100000000. The unit is byte.
Default value: 4096
track_stmt_retention_time
Parameter description: Specifies the retention period of full/slow SQL statement records. This is a combination of parameters. This parameter is read every 60 seconds and records exceeding the retention period are deleted. Only the sysadmin user can access this parameter.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
- full sql retention time indicates the retention period of full SQL statements. The value ranges from 0 to 86400. The unit is second.
- slow sql retention time indicates the retention period of slow SQL statements. The value ranges from 0 to 604800. The unit is second.
Default value: 3600,604800
track_stmt_stat_level
Parameter description: Determines the level of statement execution tracing.
This is a USERSET parameter. Set it based on instructions provided in Table 1. The value is case-insensitive.
Value range: a string
This parameter consists of two parts in the format of 'full sql stat level, slow sql stat level'.
The first part indicates the tracing level of full SQL statements. The value can be OFF, L0, L1, or L2.
The second part indicates the tracing level of slow SQL statements. The value can be OFF, L0, L1, or L2.
If the tracing level of full SQL statements is not OFF, the current SQL statement tracing level is a higher level (L2 > L1 > L0) of full and slow SQL statements. For details about the levels, see "System Catalogs and System Views > System Catalogs > STATEMENT_HISTORY > STATEMENT_HISTORY columns" in the Developer Guide.
Default value: OFF,L0
enable_auto_clean_unique_sql
Parameter description: Specifies whether to enable the automatic elimination function of unique SQL statements when the number of unique SQL statements generated in the system is greater than or equal to the value of instr_unique_sql_count.
This parameter is a POSTMASTER parameter. Set it based on instructions provided in Table 1.
Value range: Boolean
Default value: off
Some snapshot information comes from unique SQL statements. Therefore, when automatic elimination is enabled, if the selected start snapshot and end snapshot exceed the elimination time, the WDR report cannot be generated.
asp_log_directory
Parameter description: Specifies the directory for storing ASP log files on the server when asp_flush_mode is set to all or file. The value can be an absolute path, or relative to the data directory. Only the sysadmin user can access this parameter.
This parameter is a POSTMASTER parameter. Set it based on instructions provided in Table 1.
If the value of asp_log_directory in the configuration file is an invalid path, the database instance cannot be restarted.
- Valid path: Users must have read and write permissions on the path.
- Invalid path: Users do not have read or write permissions on an invalid path.
Value range: a string
Default value: specified during installation
enable_slow_query_log (Discarded)
Parameter description: Specifies whether to write the slow query information to the log file. This parameter is discarded in this version.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: Boolean
- on: indicates that slow query information needs to be written into log files.
- off: indicates that slow query information does not need to be written into log files.
Default value: on
query_log_file (Discarded)
Parameter description: If enable_slow_query_log is set to ON, slow query records are written into log files. query_log_file specifies the name of a slow query log file on the server. Only the sysadmin user can access this parameter. Generally, log file names are generated in strftime mode. Therefore, the system time can be used to define log file names, which are implemented using the escape character %. This function has been discarded in this version.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
You are advised to use %-escapes to specify the log file names for efficient management of log files.
Value range: a string
Default value: slow_query_log-%Y-%m-%d_%H%M%S.log
query_log_directory (Discarded)
Parameter description: Specifies the directory for storing low query log files when enable_slow_query_log is set to on. Only the sysadmin user can access this parameter. It can be an absolute path or a relative path (relative to the data directory), which has been discarded in this version.
This parameter is a POSTMASTER parameter. Set it based on instructions provided in Table 1.
If the value of query_log_directory in the configuration file is an invalid path, the database instance cannot be restarted.
Valid path: Users have read and write permissions on the path.
Invalid path: You do not have read or write permission on the path.
Value range: a string
Default value: specified during installation
perf_directory
Parameter description: Specifies the directory of the output file of the performance view dotting task. Only the sysadmin user can access this parameter. The value can be an absolute path, or relative to the data directory.
This parameter is a POSTMASTER parameter. Set it based on instructions provided in Table 1.
- Valid path: Users must have read and write permissions on the path.
- Invalid path: Users do not have read or write permissions on an invalid path.
Value range: a string
Default value: specified during installation
unique_sql_retention_time
Parameter description: Specifies the memory cleanup interval for the unique SQL hash table. The default value is 30 minutes.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: an integer ranging from 1 to 3650. The unit is minute.
Default value: 30min
track_stmt_standby_chain_size
Parameter description: Specifies the maximum memory and disk space occupied by fast/slow SQL statement records on the standby node. This is a combination of parameters. Only the SysAdmin user can access the database.
This is a SIGHUP parameter. Set it based on instructions provided in Table 1.
Value range: a string
This parameter consists of four parts in the format of 'Full SQL memory size, Full SQL disk size, Slow SQL memory size, Slow SQL disk size'.
Full SQL and slow SQL statement are stored in different locations. Therefore, four additional values are used for control.
- Full SQL memory size indicates the maximum memory space reserved for fast SQL statements. The value range is [16,1024], in MB.
- Full SQL disk size indicates the maximum disk space occupied by reserved fast SQL statements. The value range is [512,1048576], in MB.
- Slow SQL memory size indicates the maximum memory space reserved for slow SQL statements. The value range is [16,1024], in MB.
- Slow SQL disk size indicates the maximum disk space reserved for slow SQL statements. The value range is [512,1048576], in MB.
The memory size cannot be greater than the disk size.
Default value: 32, 1024, 16, 512
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