SYNOPSIS

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

DESCRIPTION

Note

The following description applies both to Postgres-XC and PostgreSQL if not described explicitly.

DROP CAST removes a previously defined cast.

To be able to drop a cast, you must own the source or the target data type. These are the same privileges that are required to create a cast.

PARAMETERS

IF EXISTS

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

source_type

The name of the source data type of the cast.

target_type

The name of the target data type of the cast.

CASCADE, RESTRICT

These key words do not have any effect, since there are no dependencies on casts.

EXAMPLES

To drop the cast from type text to type int:

DROP CAST (text AS int);

COMPATIBILITY

The DROP CAST command conforms to the SQL standard.