Use CALL statement where procedure definition exists

This type of CALL statement reads all the information about the procedure and the argument attributes from the CREATE PROCEDURE catalog definition.

The following PL/I example shows a CALL statement that corresponds to the CREATE PROCEDURE statement shown.

DCL HV1 CHAR(10);
DCL IND1 FIXED BIN(15);
   :
EXEC SQL CREATE P1 PROCEDURE
          (INOUT PARM1 CHAR(10))
          EXTERNAL NAME MYLIB.PROC1
          LANGUAGE C
          GENERAL WITH NULLS;
   :
EXEC SQL CALL P1 (:HV1 :IND1);
   :

When this CALL statement is issued, a call to program MYLIB/PROC1 is made and two arguments are passed. Since the language of the program is ILE C, the first argument is a C NUL-terminated string eleven characters long containing the contents of host variable HV1. Note that on a call to an ILE C procedure, DB2^® SQL for iSeries™ adds one character to the parameter declaration if the parameter is declared to be a character, graphic, date, time, or timestamp variable. The second argument is the indicator array. In this case, it is one short integer since there is only one parameter in the CREATE PROCEDURE statement. This argument contains the contents of indicator variable IND1 on entry to the procedure.

Since the first parameter is declared as INOUT, SQL updates the host variable HV1 and the indicator variable IND1 with the values returned from MYLIB.PROC1 before returning to the user program.

Notes:

The procedure names specified on the CREATE PROCEDURE and CALL statements must match EXACTLY in order for the link between the two to be made during the SQL precompile of the program.
For an embedded CALL statement where both a CREATE PROCEDURE and a DECLARE PROCEDURE statement exist, the DECLARE PROCEDURE statement will be used.