Ideas to workaround view merge being disabled (try #2)

From: Jesse, Rich <Rich.Jesse_at_qtiworld.com>
Date: Thu, 08 Jan 2004 09:09:27 -0800
Message-ID: <F001.005DC28A.20040108090927@fatcity.com>

<sigh> stupid KVM hacking my mouse gets me again. Here's the *whole* message:

Hey all,

So, there I am on 8.1.7.4.0 creating some SQL suitable for a view:

SELECT

TS.username, 
TS.reportdate, 
TS.hours AS hours, 

DECODE(TD.description, NULL, SC.DESCRIPTION, TD.DESCRIPTION) AS TASK_DESCRIPTION,
TEAM.teamtype AS TeamType,

TS.productline,
ST.SUBTASKID "DEFECTID",
ST.DESCRIPTION "DEFECT_DESCRIPTION"

FROM

T1 TS,
T2 ST,
T3 TD, 
TEAM , 

T5 SC
WHERE

TS.TASKID = TD.TASKID (+) AND 
TS.TEAMID = TEAM.TEAMID AND 
TS.WORKORDERNO = SC.WORKORDERNO (+) 

AND TS.operation = SC.OPERATIONNO (+)
AND TS.TASKID = ST.TASKID (+); Works great, except when the view is created from this SQL because according to Metalink article 1030221.6, the DECODE function is preventing the view from being merged, causing an FTS on the T5 (SC) table. Of course, this table is near 1M rows and gets caught in an inner NL in the explain plan
(cutting/pasting the explain plan doesn't seem to want to work in Windohs).

The doc says the workaround is to move the DECODE outside the view. This won't work for us as the end-user is <sigh> MS Access. Anyone have an idea other than a RULE hint to get around this?

TIA,
Rich

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Author: Jesse, Rich
  INET: Rich.Jesse_at_qtiworld.com

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Received on Thu Jan 08 2004 - 11:09:27 CST