Help Center/ GaussDB/ Developer Guide(Centralized_V2.0-2.x)/ SQL Reference/ SQL Syntax/ DROP CAST
Updated on 2025-02-27 GMT+08:00
View PDF
Share

DROP CAST

Description

Drops a type conversion.

Precautions

DROP CAST drops a previously defined type conversion.

To drop a type conversion, you must have permissions on the source or destination data type. This is the same permission as creating a type conversion.

Syntax

DROP CAST [ IF EXISTS ] (source_type AS target_type) [ CASCADE | RESTRICT ]

Parameters

  • IF EXISTS

    Do not throw an error if the specified conversion does not exist. A notice is issued in this case.

  • source_type

    Source data type in the type conversion.

  • target_type

    Type of the target data in the type conversion.

  • CASCADE

    RESTRICT

    These keys have no effect because there is no dependency on type conversion.

Examples

Drop the conversion from text to int.

DROP CAST (text AS int);

Compatibility

DROP CAST complies with the SQL standard.

Parent topic: SQL Syntax