Positioning the File Pointer and calling programs

Fall 2011

SETLL – Positioning the File Pointer• Sequential Access File• Positions the file pointer at the first record where

the key field is greater than on equal to what’s looked for

• Must be followed by a READ• Use %FOUND to determine if the record found is

greater than or equal to the key field• Use %EQUAL to determine if the record found is

exactly the same as the key field that you are looking for

SETLL Example

/Freesetll *loval custmast;

read custmast;/end-free

SETLL – Example

/Freesetll custin custmast;

if %equal(custmast);exsr validcust;

else;exsr invalidcust;

endif;/end-free

Custno Note Note_dtls1 1 Customer arrived1 2 Customer left3 1 Customer away

If Custin = 1, then the file pointer for the first record will be returned

SETGT

• Sequential Access File• Positions the file pointer at the first record where the

key field is greater than what’s looked for• Must be followed by a READ• Use %FOUND to determine if the record found is

greater than the key field

Setgt Example

/Freesetll custin custmast;

if %equal(custmast);exsr validcust;

else;exsr invalidcust;

endif;/end-free

Custno Note Note_dtls1 1 Customer arrived1 2 Customer left3 1 Customer away

If Custin = 1, then the file pointer for the last record will be returned

Calling Programs

Code in pgmADfullreport PR EXTPGM(‘REPORT’)/free callp fullreport();

Code in pgmB

pgmA pgmBNo parametersPassed

Calling Programs

Code in pgmA Code in pgmBDDtlreport PR EXTPGM(‘REPORT’) Ddtlreport PRD parm1 10A D parm1 10A/free Ddtlreport PI callp Dtlreport(field1); D parm1 10A

Code in pgmB

pgmA pgmBparametersPassed