CALL — invoke a procedure
argument] [, ...] )
CALL executes a procedure.
If the procedure has any output parameters, then a result row will be returned, containing the values of those parameters.
The name (optionally schema-qualified) of the procedure.
An argument expression for the procedure call.
Arguments can include parameter names, using the syntax
. 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.)
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
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.
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.
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