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I know chain keyword retreive records randomly but how chain
keyword exactly works internally????
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Answer / drew
CHAIN:
positions current record to correct record based on key
sets HI indicator *ON if position fails and sets %found()
off in free-form code
reads the record fields into the automatic internal buffer
fields
locks the record, if in update mode and "no lock" has not
been added to the command ( chain(n))
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Answer / sandy
chain op code firstly set the file pointer to BOF(begin of file).then look for key or rrn which is specified in factor 1.
in rpg400 EX:
Factor1 opcode factor2 Key/rrn chain file name/record format name
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Answer / nkumar
With chain High indicator is defined which will be set on if record is not found. Chain works exactly like SETLL and then READ record. If the record is found it will be read and indicator will be OFF and if record is not found then indicator will be ON.
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