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  3. November 2012

Re: Query Optimizer selection incorrect access path

Hi, Charles

I think it's a bug because all tables in the SQL statement are qualified.

I've also checked the query options file used and it specifically states IGNORE_DERIVED_INDEX value = '*YES'.

This is a really simple left outer join of the data table to the two master tables with key values so it should be rather transparent. On further review, the LF that the optimizer is selecting has a data table with almost 2 million rows (!) joined to the master file that I need (which has 296 rows) and one additional master table that is ancillary to the first master table. It just doesn't make sense.

I've opened a PMR with IBM. I'll report back the results if/when we get it worked out.

Robert


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