Help Center/ GaussDB/ Developer Guide(Centralized_8.x)/ SQL Reference/ SQL Syntax/ D/ DROP CAST
Updated on 2024-06-03 GMT+08:00
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DROP CAST

Description

Deletes a type conversion.

Precautions

To delete 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

For details, see 8.12.8.12-Examples in section "CREATE CAST."

Helpful Links

CREATE CAST

Compatibility

DROP CAST complies with the SQL standard.

Parent topic: D