Help Center/ MapReduce Service/ Component Operation Guide (LTS)/ Using HetuEngine/ Common HetuEngine SQL Syntax/ HetuEngine DDL SQL Syntax/ CREATE SCHEMA
Updated on 2024-12-13 GMT+08:00
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CREATE SCHEMA

CREATE (DATABASE|SCHEMA) [IF NOT EXISTS] database_name

[COMMENT database_comment]

[LOCATION hdfs_path]

[WITH DBPROPERTIES (property_name=property_value,...)];

CREATE (DATABASE|SCHEMA) [IF NOT EXISTS] database_name

[WITH (property_name=property_value,...)]

Description

This statement is used to create an empty schema. A schema is a container for tables, views, and other database objects. If the optional parameter IF NOT EXISTS is specified and a schema with the same name already exists in the system, no error is reported.

The default schema path is hdfs://hacluster/user/hive/warehouse/.

Example

  • Creating a schema named "web": 
    CREATE SCHEMA web;
  • Create a schema in the specified path. The following is an example: 
    CREATE SCHEMA test_schema_5 LOCATION '/user/hive';
  • Run the following command to create a schema named sales in the catalog named Hive: 
    CREATE SCHEMA hive.sales;
  • If the schema named traffic does not exist in the current catalog, run the following command to create a schema named traffic: 
    CREATE SCHEMA IF NOT EXISTS traffic;
  • Create a schema with attributes: 
    CREATE DATABASE createtestwithlocation COMMENT 'Holds all values' LOCATION '/user/hive/warehouse/create_new' WITH dbproperties('name'='akku', 'id' ='9');
 
--Use the describe schema|database statement to query the schema created:
describe schema createtestwithlocation;