how can you check for a records existence without causing and i/o (chain/read)?

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how can you check for a records existence without causing and i/o (chain/read)?..

Answer / kanckan singh

With the help of File Information Data Structure, we can check existence of records in a physical file. The code is described below:

In File description continuation line (IPFK),

KINFDS RCDS

IRCDS DS
I*RECORD
#RCDS

with the above code we can check the existence of records in a file without causing I/O operation.

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