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re: Cobol native calls - locne, redne

re: Cobol native calls - locne, redne

I am writing my first Cobol/Datacom program .. can someone tell me difference between Datacom 'Locate' and 'Read' options? e.g. LOCNE locates next equal key - REDNE reads the next equal key.

Thank you,


RE: re: Cobol native calls - locne, redne

LOCXX are LOCATE commands.  These are used for existence testing and merely tell you if the record is present on the database and what the key value is.

REDXX are READ commands.  Thes actually read the data (and internally includes the equivalent LOCxx command), puts it in a buffer and returns it to the program.

If you are reading data, you can skip *all* of the LOCXX commands, they are totally unnecessary and would actually increase your overhead.  (IE, don't code LOCNE followed by a REDLE or REDKX.)  If, on the other hand, you have a KEY of STZIP and want to get a count of records in a specific state and zip code combination, the LOCKX and LOCNE commands would be cheaper.

Let me guess, you are trying to do this without taking a programming class (CA offers DB100)....

RE: re: Cobol native calls - locne, redne

Thanks, big help!


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