Query tuning - Mailing list pgsql-sql

<div class="Section1"><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span style="font-size:
10.0pt;font-family:"Comic Sans MS"">Hi,</span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS"">I have a query which is run across 3 tables JOB_TYPE_FIRST, JOB_TYPE_SECOND and
JOB_ALLOCATION_WORKLIST.</span></font><pclass="MsoNormal"><font face="Comic Sans MS" size="2"><span style="font-size: 
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS"">The column JOBID is referenced in JOB_ALLOCATION_WORKLIST table and primary key in
bothJOB_TYPE_FIRST, JOB_TYPE_SECOND tables.</span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS"">There is one more column BOOK_ID which is supplied as the binding parameter to the
query.The query looks like:</span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS"">select count(distinct(j.JOBID)) as jobCount </span></font><p
class="MsoNormal"><fontface="Comic Sans MS" size="2"><span style="font-size: 
10.0pt;font-family:"Comic Sans MS"">from  JOB_TYPE_FIRST a, JOB_TYPE_SECOND b, JOB_ALLOCATION_WORKLIST j
</span></font><pclass="MsoNormal"><font face="Comic Sans MS" size="2"><span style="font-size: 
10.0pt;font-family:"Comic Sans MS"">where (( a.JOBID = j.JOBID) </span></font><p class="MsoNormal"><font face="Comic
SansMS" size="2"><span style="font-size: 
10.0pt;font-family:"Comic Sans MS"">and (a.BOOK_ID = :bookId)) </span></font><p class="MsoNormal"><font face="Comic
SansMS" size="2"><span style="font-size: 
10.0pt;font-family:"Comic Sans MS"">or ((b.JOBID = j.JOBID) </span></font><p class="MsoNormal"><font face="Comic Sans
MS"size="2"><span style="font-size: 
10.0pt;font-family:"Comic Sans MS"">and (b.BOOK_ID = :bookId));</span></font><p class="MsoNormal"><font face="Comic
SansMS" size="2"><span style="font-size: 
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS"">As the records in the database are too large it is having huge cost and stalling
theserver and takes lot of time. </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS"">Can anyone suggest a better way to fetch the results for the query or tune it? Any
helpwould be highly appreciated.</span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS""> </span></font><p class="MsoNormal"><font face="Comic Sans MS" size="2"><span
style="font-size:
10.0pt;font-family:"Comic Sans MS"">Thanks & Regards,</span></font><p class="MsoNormal"><font face="Comic Sans MS"
size="2"><spanstyle="font-size: 
10.0pt;font-family:"Comic Sans MS"">Kapil</span></font></div><p><strong><span style="font-size:10.0pt;font-family:
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