Call function in select statement : Function Call « Store Procedure Function « PostgreSQL

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PostgreSQL » Store Procedure Function » Function Call 
Call function in select statement


postgres=# CREATE FUNCTION "test" (integerRETURNS integer AS '
postgres'#
postgres'#  DECLARE
postgres'#   variable ALIAS FOR $1;
postgres'#  BEGIN
postgres'#   return variable * 2;
postgres'#  END;
postgres'#  ' LANGUAGE 'plpgsql';
CREATE FUNCTION
postgres=#
postgres=# select test(1);
 test
------
    2
(row)

postgres=#
postgres=# drop function test(integer);
DROP FUNCTION
postgres=#
postgres=#
           
       
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