Help Center/ Data Warehouse Service / SQL Syntax Reference (9.1.0.x)/ DDL Syntax/ ALTER SCHEMA
Updated on 2025-09-18 GMT+08:00
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ALTER SCHEMA

Function

ALTER SCHEMA changes the attributes of a schema.

Precautions

  • Only the owner of a schema or users with the ALTER permission for the schema can run the ALTER SCHEMA statement. System administrators have this permission by default.
  • To change the owner of a schema or its storage limit, a non-admin user must be directly or indirectly part of the new role and have CREATE permission on the database.

Syntax

  • Rename a schema. 
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    ALTER SCHEMA schema_name 
    RENAME TO new_name;
  • Changes the owner of a schema. 
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    ALTER SCHEMA schema_name 
    OWNER TO new_owner;
  • Changes the storage space limit of the permanent table in the schema. 
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    ALTER SCHEMA schema_name 
    WITH PERM SPACE 'space_limit';

Parameter Description

Table 1 ALTER SCHEMA parameters

Parameter

Description

Value Range

schema_name

Specifies the name of the schema to be modified.

Name of an existing schema.

new_name

Specifies the new schema name.

A string compliant with the identifier naming rules.

new_owner

Specifies the new schema owner.

Name of an existing user or role.

WITH PERM SPACE 'space_limit'

The upper limit of the permanent table storage space of the schema.

A string consists of an integer and unit. The unit can be K/M/G/T/P. The parsed value is in kilobytes (K) and must stay within the 1 KB to 9,007,199,254,740,991 KB range.

Examples

Create an example schema schema_test and a user user_a.

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CREATE SCHEMA schema_test;
CREATE USER user_a PASSWORD '{Password}';

Rename schema_test to schema_test1.

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ALTER SCHEMA schema_test RENAME TO schema_test1;

Change the owner of schema_test1 to user_a.

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ALTER SCHEMA schema_test1 OWNER TO user_a;

Helpful Links

CREATE SCHEMA and DROP SCHEMA

Parent Topic: DDL Syntax