Comments on: CHAIN(E) http://itknowledgeexchange.techtarget.com/itanswers/chaine/ Sun, 19 May 2013 03:14:28 +0000 hourly 1 By: gilly400 http://itknowledgeexchange.techtarget.com/itanswers/chaine/#comment-52593 gilly400 Wed, 02 Apr 2008 15:02:11 +0000 #comment-52593 Hi,

I’m not sure whether the previous answers were what you were looking for, maybe you just wanted to know what the chain operation does :-

Chain is an operation code to retrieve a single data record from a file. The record can be retrieved by relative record number or a key (if the file has a key defined). After a chain operation the record can be updated with new data or the record can be deleted from the file.

Regards,

Martin Gilbert.

]]> By: birddon http://itknowledgeexchange.techtarget.com/itanswers/chaine/#comment-52592 birddon Wed, 02 Apr 2008 14:39:29 +0000 #comment-52592 The E extender tells the program that you are handling errors on the CHAIN. You can test for an error condition by using the %ERROR BIF and when it is true, test for specific situations using the %STATUS BIF if that is appropriate for your code. The %ERROR will only work when you specify the E extender on the operation.
One thing to be aware of is that if an error indicator is also specified, the program will consider the error handled by the indicator and the %ERROR BIF will not test true. The indicator comes before the E extender in the error handling hierarchy, and the MONITOR comes after the extender.

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