Overrides of Parameters

Keywords that override EXEC statement keywords within a procedure appear in the text string for the EXEC statement for the procedure. The values specified for the overridden keywords are applied to the EXEC statement during conversion.

//                 EXEC PROC=PROCA,TIME.STEP1=2,PARM.STEP2='ABCD'

Proc Key	Number Parameters	Proc Length	Proc Name
8B	01	05	PROCA

Key	Number Parameters	Step Length	Step Name	Parm Length	Parm
8F	02	05	STEP1	01	F2

Key	Number Parameters	Step Length	Step Name	Parm Length	Parm
8E	02	05	STEP2	04	ABCD

DD statements that override DD statements within a procedure are merged with the overridden statement as the statements are converted. The resulting text string contains the result of the merged statements. The merging of the statements keeps all the keywords present on the overridden statement as long as they are not explicitly overridden or are not mutually exclusive with a keyword already specified on the overriding statement.

  //DD1 DD SYSOUT=A,DCB=(LRECL=133,DSORG=PS)

is overridden by

  //STEP1.DD1 DD DSN=XYZ,DCB=LRECL=80,DISP=SHR

The keywords are merged so that overridden parameters are replaced and mutually exclusive parameters are nullified. The resulting text string contains

//DD1 DD DSN=XYZ,DCB=(LRECL=80,DSORG=PS),DISP=SHR