---
title: "ALTER CONVERSION"
source: https://cloudberry.apache.org/docs/sql-stmts/alter-conversion
---

# ALTER CONVERSION

Changes the definition of a conversion.

## Synopsis

```sql
ALTER CONVERSION <name> RENAME TO <new_name>

ALTER CONVERSION <name> OWNER TO { <new_owner> | CURRENT_USER | SESSION_USER }

ALTER CONVERSION <name> SET SCHEMA <new_schema>
```

## Description

`ALTER CONVERSION` changes the definition of a conversion.

You must own the conversion to use `ALTER CONVERSION`. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have `CREATE` privilege on the conversion's schema. (These restrictions enforce that altering the owner does not do anything you could not do by dropping and recreating the conversion. However, a superuser can alter ownership of any conversion anyway.)

## Parameters

**`name`**

The name (optionally schema-qualified) of an existing conversion.

**`new_name`**

The new name of the conversion.

**`new_owner`**

The new owner of the conversion.

**`new_schema`**

The new schema for the conversion.

## Examples

To rename the conversion `iso_8859_1_to_utf8` to `latin1_to_unicode`:

```sql
ALTER CONVERSION iso_8859_1_to_utf8 RENAME TO latin1_to_unicode;
```

To change the owner of the conversion `iso_8859_1_to_utf8` to `joe`:

```sql
ALTER CONVERSION iso_8859_1_to_utf8 OWNER TO joe;
```

## Compatibility

There is no `ALTER CONVERSION` statement in the SQL standard.

## See also

[CREATE CONVERSION](/docs/sql-stmts/create-conversion.md), [DROP CONVERSION](/docs/sql-stmts/drop-conversion.md)