Returns the actual version of the collation object as it is currently installed in the operating system.
Signatures & examples
pg_collation_actual_version ( oid ) → text
Returns the actual version of the collation object as it is currently installed in the operating system. If this is different from the value in pg_collation.collversion, then objects depending on the collation might need to be rebuilt. See also ALTER COLLATION.Version history 2