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How can i start with 51st record for next time

 
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pathuri.anji
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Joined: 05 Dec 2007
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PostPosted: Thu Jan 31, 2008 2:10 pm    Post subject: How can i start with 51st record for next time
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Hi,


I have a question related to db2 tables

Q) I have a table with 100 records.while reading the records i got

abend at 50th record then how can i start with 51st record for next time?

Regards
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dbzTHEdinosauer

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PostPosted: Thu Jan 31, 2008 2:13 pm    Post subject: db2 answer
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keep track of how many rows (record is term that relates to files/ row is the term for DB2) you process during the run and insure this counter/place-marker is available each time your program runs.
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dbzTHEdinosauer

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PostPosted: Thu Jan 31, 2008 5:54 pm    Post subject:
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This is restart philosophy.

you have not mentioned the activity/process you are executing.

It can become complicated based on:
  • if you update the rows and have no commit, then you need to start at the beginning after an ABEND. (do not confuse ABEND with a non-zero SQLCODE, they are not the same.)
  • if you have a commit interval, your counter would be based on the point of last commit
  • if you have an output file, you may or may not need to use OPEN output extend when you recognize a restart process
  • normally, each shop has some type of 'RESTART' table which contains indicators as to counts, whether this is restart or fresh start


Basically, you need an external (from the program - like restart table) source to tell your program if it is a fresh start or a restart. you need to have logic to start your db2 process at the proper place as well as positioning any output vsam/qsam files.

lot depends on if this is batch or online. what I have described is a batch restart process.
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