ALTER SCHEMA

Description

Modifies schema attributes.

Precautions

• Only the owner of a schema or users granted with the ALTER permission on the schema can run the ALTER SCHEMA command. The system administrator has this permission by default. To change the owner of a schema, you must be the owner of the schema or system administrator and a member of the new owner role.

• For system schemas other than public, such as pg_catalog and sys, only the initial user is allowed to change the owner of a schema. Changing the names of the built-in system schemas may make some functions unavailable or even affect the normal running of the database. By default, the names of the built-in system schemas cannot be changed. To ensure forward compatibility, you can change the names of the built-in system schemas only when the system is being started or upgraded or when allow_system_table_mods is set to on.
• Only the initial user can change the owner of a schema to an O&M administrator. Other users cannot change the owner of a schema to an O&M administrator.

Syntax

• Rename a schema.

  1 2	ALTER SCHEMA schema_name RENAME TO new_name;

• Change the owner of a schema.

  1 2	ALTER SCHEMA schema_name OWNER TO new_owner;

Parameters

• schema_name

  Specifies the name of an existing schema.

  Value range: an existing schema name.

• RENAME TO new_name

  Rename a schema.

  new_name: new name of the schema.

  

  • The schema name must be unique in the current database.
  • The schema name cannot be the same as the initial username of the current database.
  • The schema name cannot start with pg_.
  • The schema name cannot start with gs_role_.

  Value range: a string. It must comply with the naming convention.

• OWNER TO new_owner

  Change the owner of a schema. To do this as a non-administrator, you must be a direct or indirect member of the new owner role, and that role must have the CREATE permission on the database.

  new_owner: new owner of the schema.

  Value range: an existing username or role name.

Examples

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16

-- Create the ds schema.
gaussdb=# CREATE SCHEMA ds;

-- Rename the current schema ds to ds_new.
gaussdb=# ALTER SCHEMA ds RENAME TO ds_new;

-- Create user jack.
gaussdb=# CREATE USER jack PASSWORD '********';

-- Change the owner of ds_new to jack.
gaussdb=# ALTER SCHEMA ds_new OWNER TO jack;


-- Delete user jack and schema ds_new.
gaussdb=# DROP SCHEMA ds_new;
gaussdb=# DROP USER jack;

Helpful Links

CREATE SCHEMA and DROP SCHEMA