- What's New
- Service Overview
- Getting Started
-
User Guide
- Database Evaluation
- Object Migration
- SQL Statement Conversion
- Conversion Configuration
- SQL Audit
- Data Source Management
- Permissions Management
- Interconnection with CTS
- Best Practices
- Security White Paper
-
API Reference
- Before You Start
- API Types
- Calling APIs
-
API
- API Version Management
- Quota Management
- SQL Statement Conversion
- Evaluation Project
-
Migration Project
- Creating a Migration Project
- Querying Migration Projects
- Querying the Status of a Migration Project
- Checking Target Database Permissions
- Querying Permission Check Results
- Querying Migration Project Details
- Submitting Syntax Conversion of Objects
- Querying Syntax Conversion Progress of Objects
- Submitting Verification
- Querying the Verification Progress
- Downloading a Migration Error Report
- Deleting a Migration Project
- Permissions Policies and Supported Actions
- Appendixes
- SDK Reference
-
FAQs
-
Product Consulting
- Instance Freezing, Release, and Deletion
- Which Schemas in Source Databases Are Ignored for Migration?
- What Are the Differences Between Syntax Conversion and Migration & Verification in a Migration Project?
- What Are the Database Schema Changes After an Oracle Database Is Migrated to the Target Database?
- Why Cannot I Use Some Functions?
- What Is the Function of the dsc_ora_ext Schema Generated After Migration to the Target Database?
- What Should I Do If Data Collection Fails or Is Slow Due to the Small Values of Certain Oracle SGA Parameters?
- What Should I Do If Data Collection Fails and a Message SNAPSHOT TOO OLD Is Displayed?
- What Is the Mapping Between the GaussDB Versions Displayed on the UGO Console and Self-built GaussDB Versions?
- What Are VPCEP Resource Quotas?
-
Database Connections
- What Should I Do If I Cannot Connect to the Source Oracle Database During Database Evaluation Project Creation?
- What Should I Do If I Failed To Connect to the Source Database as User sys?
- How Do I Create GaussDB Databases Compatible with Source Databases?
- What Should I Do If My Database Fails to be Connected?
- SQL Server Connection Test Failed (Error Code=0, SQLState=08S01)
-
Evaluation Project
- How Do I Select a Connection Method?
- How Does UGO Collect Data from Source Databases?
- How Does UGO Check Database Permissions?
- What Are the Possible Causes for an Object Collection Failure?
- In GaussDB, How Do I Configure a Search Path If A Statement Without Schema Name Fails To Be Executed?
- What Is Native Compatibility, Conversion Compatibility, Partial Compatibility, or Incompatibility?
- What Is the Relationship Between Migration Risk (Top 10 risk SQL) and Risky SQL Summary?
- What Are Reconstruction Statistics and How Are Reconstruction Points Measured?
- What Should I Do If An Object Collection Error (Closed Connection) Is Displayed During Evaluation Project Creation?
- What Should I Do If "ErrorCode=4036" Is Displayed During Evaluation Project Creation?
- What Should I Do If "ErrorCode=17002" Is Displayed During Evaluation Project Creation?
- What Do I Do If the Assessment Task Is Connected but the Pre-check Fails?
- What Is the Impact of the Collection on the Source Database?
-
Migration Project
- Why Is There No Available Evaluation Project During Migration Project Creation?
- When Should I Use the Conversion Config Function?
- What Should I Do If SQL Modifications Failed to Be Saved During Object Correction?
- How Do I Solve ERROR: syntax error at or near "@"?
- What Are the Possible Causes for an Object Verification Failure?
- What Are the Impacts of GUC Parameter Settings of GaussDB on Migration?
- How Do I Set GaussDB GUC Parameters?
- Why Is the Number of Indexes Different After Oracle Data is Migrated to GaussDB?
- What Should I Do If There Are ctid, xc_node_id, and tableoid Columns in GaussDB?
- Why Is Data Inconsistent When SELECT Statements Without ORDER BY Are Used for Query in Distributed GaussDB?
-
Product Consulting
- Videos
- General Reference
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From Microsoft SQL Server to GaussDB
Source Data Type |
Converted Data Type |
Conversion Configuration |
---|---|---|
TINYINT |
TINYINT |
- |
SMALLINT |
SMALLINT |
- |
INT |
INT |
- |
BIGINT |
BIGINT |
- |
DECIMAL |
DECIMAL |
- |
NUMERIC |
NUMERIC |
- |
FLOAT |
FLOAT |
- |
REAL |
REAL |
- |
SMALLMONEY |
numeric(10, 4) |
- |
MONEY |
numeric(19, 4) |
- |
BIT |
BOOLEAN |
Bit datatype If you select Convert the bit type to boolean data type, the storage of characters converted by DRS and UGO is equivalent. |
DATE |
DATE |
- |
SMALLDATETIME |
SMALLDATETIME |
- |
DATETIME |
TIMESTAMP(3) |
- |
DATETIME2(n) |
TIMESTAMP(n) |
- |
DATETIMEOFFSET(n) |
TIMESTAMPTZ(n) |
datetimeoffset datatype If you select Convert the datetimeoffset type to timestamptz, the storage of characters converted by DRS and UGO is equivalent. |
TIME(p) |
TIME(p) |
- |
TIMESTAMP |
BYTEA |
- |
XML |
XML |
XML datatype If you select Convert XML data type to TEXT data type, the storage of characters converted by DRS and UGO is equivalent. |
CHAR(n) |
CHAR(n) |
Mismatch character set If you select This config will adjust the size of CHAR(n), VARCHAR(n), and NCHAR(n) such that there will not be overflow, the storage of characters converted by DRS and UGO is equivalent. |
VARCHAR(n) |
VARCHAR(n) |
Mismatch character set If you select This config will adjust the size of CHAR(n), VARCHAR(n), and NCHAR(n) such that there will not be overflow, the storage of characters converted by DRS and UGO is equivalent. |
varchar(max) |
TEXT |
VARCHAR(MAX) datatype If you select Convert VARCHAR(MAX) data type to TEXT data type, the storage of characters converted by DRS and UGO is equivalent. |
NCHAR(n) |
NCHAR(n) |
Mismatch character set If you select This config will adjust the size of CHAR(n), VARCHAR(n), and NCHAR(n) such that there will not be overflow, the storage of characters converted by DRS and UGO is equivalent. |
NVARCHAR(n) |
NVARCHAR2(n) |
- |
NVARCHAR(max) |
TEXT |
NVARCHAR(MAX) datatype If you select Convert NVARCHAR(MAX) data type to TEXT data type, the storage of characters converted by DRS and UGO is equivalent. |
BINARY(n) |
BYTEA |
- |
VARBINARY(n) |
BYTEA |
- |
VARBINARY(MAX) |
BYTEA |
VARBINARY(MAX) datatype If you select Convert VARBINARY(MAX) data type to BYTEA data type, the storage of characters converted by DRS and UGO is equivalent. |
IMAGE |
BYTEA |
IMAGE datatype If you select Convert IMAGE data type to BYTEA data type, the storage of characters converted by DRS and UGO is equivalent. |
HIERARCHYID |
BYTEA |
HIERARCHYID datatype If you select Convert HIERARCHYID data type to BYTEA data type, the storage of characters converted by DRS and UGO is equivalent. |
NTEXT |
TEXT |
NTEXT datatype If you select Convert NTEXT data type to TEXT data type, the storage of characters converted by DRS and UGO is equivalent. |
TEXT |
TEXT |
TEXT datatype If you select Convert TEXT data type to TEXT data type, the storage of characters converted by DRS and UGO is equivalent. |
UNIQUEIDENTIFIER |
UUID |
- |
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