PostgreSQL 9.6.2 Documentation
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# DROP COLLATION

## Name

DROP COLLATION -- remove a collation

## Synopsis

    DROP COLLATION [ IF EXISTS ] name [ CASCADE | RESTRICT ]

## Description

`DROP COLLATION` removes a previously defined collation. To be able to drop a collation, you must own the collation.

## Parameters

`IF EXISTS`

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

`name`

  The name of the collation. The collation name can be schema-qualified.

`CASCADE`

  Automatically drop objects that depend on the collation, and in turn all objects that depend on those objects (see Section 5.13).

`RESTRICT`

  Refuse to drop the collation if any objects depend on it. This is the default.

## Examples

To drop the collation named `german`:

    DROP COLLATION german;

## Compatibility

The `DROP COLLATION` command conforms to the SQL standard, apart from the `IF EXISTS` option, which is a PostgreSQL extension.

## See Also

ALTER COLLATION, CREATE COLLATION

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