ALTER CONVERSION changes the definition of a conversion. The only currently available functionality is to rename the conversion.
The name (optionally schema-qualified) of an existing conversion.
The new name of the conversion.
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;
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