[mythtv-commits] Ticket #8819: Scheduler Optimization
MythTV
mythtv at cvs.mythtv.org
Tue Aug 24 15:14:25 UTC 2010
#8819: Scheduler Optimization
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Reporter: kormoc | Owner: gigem
Type: patch | Status: new
Priority: trivial | Milestone: unknown
Component: MythTV - Scheduling | Version: Trunk Head
Severity: low | Resolution:
Keywords: | Ticket locked: 0
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Comment (by gigem):
I believe this patch has a very high degree of causing subtle breakage in
the scheduler. The scheduler has used SELECT DISTINCT since before I
started mucking with it and is full of assumptions that every returned row
is unique. The only way to safely switch to GROUP BY is to thoroughly
check the usage of every column returned in the query. At a minimum,
recordid, manualid and probably oldrecduplicate, recduplicate and
findduplicate would need to be included in any GROUP BY clause.
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Ticket URL: <http://svn.mythtv.org/trac/ticket/8819#comment:1>
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