ALTER CONVERSION SQL - Language Statements ALTER CONVERSION change the definition of a conversion ALTER CONVERSION name RENAME TO newname ALTER CONVERSION changes the definition of a conversion. The only functionality is to rename the conversion. name The name (optionally schema-qualified) of an existing conversion. newname The new name of the conversion. ALTER CONVERSION Message returned if the command was successful. To rename the conversion iso_8859_1_to_utf_8 to latin1_to_unicode: ALTER CONVERSION iso_8859_1_to_utf_8 RENAME TO latin1_to_unicode; There is no ALTER CONVERSION statement in the SQL standard.