CALL(7) PostgreSQL 15.7 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 15.7 2024 CALL(7)
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