From: Kevin Grittner <Kevin.Grittner@wicourts.gov>
To: Tom Lane <tgl@sss.pgh.pa.us>
To: Kevin Grittner <Kgrittn.CCAP.Courts@wicourts.gov>
Cc: pgsql-hackers@postgresql.org
Cc: pgsql-performance@postgresql.org
Cc: Andrea Olson <Aolson.CCAP.Courts@wicourts.gov>
Cc: Bill Severson <BSEVERS.CCAP.Courts@wicourts.gov>
Cc: John Hutchins <jhutchi.CCAP.Courts@wicourts.gov>
Cc: Randy Peterson <RPETERS.CCAP.Courts@wicourts.gov>
Cc: Shannon Spranger <ssprang.CCAP.Courts@wicourts.gov>
Subject: Re: [PERFORM] EXISTS optimization
Date: Fri, 23 Mar 2007 17:37:16 -0500
Message-ID: <4604104C.EE98.0025.0@wicourts.gov> (raw)
In-Reply-To: <46040DAC.EE98.0025.0@wicourts.gov>
References: <4603C1A3.EE98.0025.0@wicourts.gov>
<4603C1A3.EE98.0025.0@wicourts.gov>
<25339.1174686582@sss.pgh.pa.us>
<46040DAC.EE98.0025.0@wicourts.gov>
>>> On Fri, Mar 23, 2007 at 5:26 PM, in message
<46040DAC.EE98.0025.0@wicourts.gov>, "Kevin Grittner"
<Kevin.Grittner@wicourts.gov> wrote:
> I tried something which seems
> equivalent, but it is running for a very long time. I'll show it with just
> the explain while I wait to see how long the explain analyze takes.
>
> explain
> SELECT "A"."adjustmentNo", "A"."tranNo", "A"."countyNo", "H"."date",
> "H"."userId", "H"."time"
> FROM "Adjustment" "A"
> JOIN "TranHeader" "H" ON ("H"."tranId" = "A"."adjustmentNo" AND
> "H"."countyNo" = "A"."countyNo" AND "H"."tranNo" = "A"."tranNo")
> WHERE "H"."tranType" = 'A'
> AND "A"."date" > DATE '2006- 01- 01'
> AND "H"."countyNo" = 66
> AND "A"."countyNo" = 66
> AND "H"."tranNo" IN
> (
> SELECT "D"."tranNo" FROM "TranDetail" "D"
> WHERE "D"."caseNo" LIKE '2006TR%'
> AND "D"."countyNo" = "H"."countyNo"
> )
> ;
explain analyze results:
Nested Loop (cost=0.00..181673.08 rows=1 width=46) (actual time=42224.077..964266.969 rows=2209 loops=1)
Join Filter: (("H"."tranId")::bpchar = ("A"."adjustmentNo")::bpchar)
-> Seq Scan on "Adjustment" "A" (cost=0.00..2384.27 rows=11733 width=22) (actual time=15.355..146.620 rows=13003 loops=1)
Filter: (((date)::date > '2006-01-01'::date) AND (("countyNo")::smallint = 66))
-> Index Scan using "TranHeader_pkey" on "TranHeader" "H" (cost=0.00..15.27 rows=1 width=46) (actual time=74.141..74.141 rows=0 loops=13003)
Index Cond: ((("H"."tranNo")::integer = ("A"."tranNo")::integer) AND (("H"."countyNo")::smallint = 66))
Filter: ((("tranType")::bpchar = 'A'::bpchar) AND (subplan))
SubPlan
-> Index Scan using "TranDetail_TranDetCaseNo" on "TranDetail" "D" (cost=0.00..27.66 rows=20 width=4) (actual time=0.039..58.234 rows=42342 loops=13003)
Index Cond: ((("caseNo")::bpchar >= '2006TR'::bpchar) AND (("caseNo")::bpchar < '2006TS'::bpchar) AND (("countyNo")::smallint = ($0)::smallint))
Filter: (("caseNo")::bpchar ~~ '2006TR%'::text)
Total runtime: 964269.555 ms
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To: pgsql-performance@postgresql.org
Cc: Kevin.Grittner@wicourts.gov, tgl@sss.pgh.pa.us, Kgrittn.CCAP.Courts@wicourts.gov, pgsql-hackers@postgresql.org, Aolson.CCAP.Courts@wicourts.gov, BSEVERS.CCAP.Courts@wicourts.gov, jhutchi.CCAP.Courts@wicourts.gov, RPETERS.CCAP.Courts@wicourts.gov, ssprang.CCAP.Courts@wicourts.gov
Subject: Re: [PERFORM] EXISTS optimization
In-Reply-To: <4604104C.EE98.0025.0@wicourts.gov>
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