PL/pgSQL Procedures For Web Development
PL/pgSQL procedures can have zero or more queries, IN, OUT, and INOUT parameters. They must be defined with AS <delimiter> clause and BEGIN ... END clause.
Buy Me a Coffee☕ A PL/pgSQL procedure: can have zero or more queries with BEGIN ... END clause getting zero or more values with zero or more parameters from the caller. *Be careful, BEGIN ... END clause is not transaction. can have IN, OUT, INOUT and VARIADIC parameters. *My answer explains a VARIADIC parameter. can have DECLARE clause. *My post explains it. can have type-only-parameters. *My post explains it. can have the aliases of parameters e.g. $1, $2, etc. *My post explains it. can have SELECT INTO statement. cannot have RETURN NEXT and RETURN QUERY statement. can have PERFORM...