read a sequential file in reverse order in COBOL

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8 November 2011

Anonymous

Is it possible to read a sequential file in reverse order in COBOL? One possible solution I could think of is to sort the file in reverse order and then read it, but I would want the discussion to be open for other solutions... Regards

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Sun, 01/15/2012 - 05:59

DikDude

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Joined: 12/26/2011 - 06:34

Read Reverse in COBOL

Well, the Enterprise COBOL compiler still supports REVERSED as part of the OPEN. Having said that, suggest you ignore it. REVERSED only works with single-reel datasets (excluding dasd). Why does someone believe this file needs to be read backwards?

Mon, 04/16/2012 - 08:32

Anonymous

there are cases that you need

there are cases that you need to read a file backwards, like for example you need to get the last transaction number of the file and then produce the next transaction file increasing the read transaction number by 1