Re: Query tuning - Mailing list pgsql-sql

Hi,

 

 

I have a query which is run across 3 tables JOB_TYPE_FIRST, JOB_TYPE_SECOND and JOB_ALLOCATION_WORKLIST.

 

The column JOBID is referenced in JOB_ALLOCATION_WORKLIST table and primary key in both JOB_TYPE_FIRST, JOB_TYPE_SECOND tables.

 

There is one more column BOOK_ID which is supplied as the binding parameter to the query. The query looks like:

 

select count(distinct(j.JOBID)) as jobCount

from  JOB_TYPE_FIRST a, JOB_TYPE_SECOND b, JOB_ALLOCATION_WORKLIST j

where (( a.JOBID = j.JOBID)

and (a.BOOK_ID = :bookId))

or ((b.JOBID = j.JOBID)

and (b.BOOK_ID = :bookId));

 

As the records in the database are too large it is having huge cost and stalling the server and takes lot of time.

 

Can anyone suggest a better way to fetch the results for the query or tune it? Any help would be highly appreciated.

 

 

Thanks & Regards,

Kapil

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