CALL(7)                  PostgreSQL 16.2 Documentation                 CALL(7)

NAME
       CALL - invoke a procedure

SYNOPSIS
       CALL name ( [ argument ] [, ...] )

DESCRIPTION
       CALL executes a procedure.

       If the procedure has any output parameters, then a result row will be
       returned, containing the values of those parameters.

PARAMETERS
       name
           The name (optionally schema-qualified) of the procedure.

       argument
           An argument expression for the procedure call.

           Arguments can include parameter names, using the syntax name =>
           value. This works the same as in ordinary function calls; see
           Section 4.3 for details.

           Arguments must be supplied for all procedure parameters that lack
           defaults, including OUT parameters. However, arguments matching OUT
           parameters are not evaluated, so it's customary to just write NULL
           for them. (Writing something else for an OUT parameter might cause
           compatibility problems with future PostgreSQL versions.)

NOTES
       The user must have EXECUTE privilege on the procedure in order to be
       allowed to invoke it.

       To call a function (not a procedure), use SELECT instead.

       If CALL is executed in a transaction block, then the called procedure
       cannot execute transaction control statements. Transaction control
       statements are only allowed if CALL is executed in its own transaction.

       PL/pgSQL handles output parameters in CALL commands differently; see
       Section 43.6.3.

EXAMPLES
           CALL do_db_maintenance();

COMPATIBILITY
       CALL conforms to the SQL standard, except for the handling of output
       parameters. The standard says that users should write variables to
       receive the values of output parameters.

SEE ALSO
       CREATE PROCEDURE (CREATE_PROCEDURE(7))

PostgreSQL 16.2                      2024                              CALL(7)