PostgreSQL 9.5.3 Documentation
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# DROP CAST

## Name

DROP CAST -- remove a cast

## Synopsis

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

## Description

`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.

## See Also

CREATE CAST

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