how does CHAIN statment work? rpgle as400
Hi,
How does CHAIN work?
in particular, if I have 10 records: 1,2,3,4,..,10
if I have just read the 10th record (10).
if I execute this statment:2 chain file
Does the program auto-return to the top of the file in order
to find my 2th record,
or instead it returns NOT FOUND value??
thanks
How does CHAIN work?
in particular, if I have 10 records: 1,2,3,4,..,10
if I have just read the 10th record (10).
if I execute this statment:2 chain file
Does the program auto-return to the top of the file in order
to find my 2th record,
or instead it returns NOT FOUND value??
thanks
Hi
chain gets the a rcord basewd on the index on the file along with other criteria.
It return a single record.
if you have the 10 recors in an indexed file
chain 2 will reset the pointer, if you then did a read you would ger record 3.
Dave
chain gets the a rcord basewd on the index on the file along with other criteria.
It return a single record.
if you have the 10 recors in an indexed file
chain 2 will reset the pointer, if you then did a read you would ger record 3.
Dave
ASKER
SORRY,
I don't mean 2, but the key=2 like the value of the 2th record.
eval key= 2
key chain filename
the key of the file if the field VALUE. (1,2,3,..10)
I don't mean 2, but the key=2 like the value of the 2th record.
eval key= 2
key chain filename
the key of the file if the field VALUE. (1,2,3,..10)
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ASKER
thank you very clear explanation.
ASKER
the key is obviously the only field I have, the value 1,2,3..10
thanks