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How can read PF in reverse order (end to start) in CL pgm..
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Answer Posted / harkesh
you can read a physical file in DESENDING ORDER. You can
first sort the physical file in decending order through
OPNQRYF using KEYFLD. This will sort your PF in decending
order based on your key field and then do the RCVF on this
file.
But for this you first need to do OVRDBF on the file.
THIS IS ONLY THE WAY ON THE WE CAN READ PF IN REVERSE ORDER
BUT FOR THIS FILE SHOULD BE KEYED FILE.
ANOTHER WAY FOR THIS ON THE BASIS OF RRN. FIRST FIND OUT
TOTAL NO OF RECORD USING RTVMBRDSC COMMMAND IN CL PROGRAM.
THEN MOVE TOTAL NO TO RRN. THEN BY USING OVRDBF COMMAND SET
POINTER ON THE BASIS OF RRN. AND IN LOOP ON THE BASIS OF
RRN. LIKE
LOOP: OVERDBF FILENAME POINTER = &RRN
IF RRN NOT = 0
RCVF RCDFMTNAME.
RRN= RRN-1.
ELSE
ENDPGM
END-IF.
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