> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/reference/sql-commands/sql-dropconversion.md).

# DROP CONVERSION

### DROP CONVERSION

DROP CONVERSION — remove a conversion

### Synopsis

```

DROP CONVERSION [ IF EXISTS ] name [ CASCADE | RESTRICT ]
```

### Description

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

### Parameters

`IF EXISTS` : Do not throw an error if the conversion does not exist. A notice is issued in this case.

*`name`* : The name of the conversion. The conversion name can be schema-qualified.

`CASCADE`\
`RESTRICT` : These key words do not have any effect, since there are no dependencies on conversions.

### Examples

To drop the conversion named `myname`:

```

DROP CONVERSION myname;
```

### Compatibility

There is no `DROP CONVERSION` statement in the SQL standard, but a `DROP TRANSLATION` statement that goes along with the `CREATE TRANSLATION` statement that is similar to the `CREATE CONVERSION` statement in PostgreSQL.

### See Also

[ALTER CONVERSION](/reference/sql-commands/sql-alterconversion.md), [CREATE CONVERSION](/reference/sql-commands/sql-createconversion.md)

***

原文：[PostgreSQL 18.6 Documentation](https://www.postgresql.org/docs/18/sql-dropconversion.html)（英文原文，待翻譯）


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