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postgres=#
postgres=# -- Functions with Output Parameters
postgres=#
postgres=# CREATE FUNCTION add_em (IN x int, IN y int, OUT sum int)
postgres-# AS 'SELECT $1 + $2'
postgres-# LANGUAGE SQL;
CREATE FUNCTION
postgres=#
postgres=# SELECT add_em(3,7);
REATE
add_em
--------
10
(1 row)
postgres=#
postgres=# drop function add_em(IN x int, IN y int, OUT sum int);
DROP FUNCTION
postgres=#
postgres=#
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