[mythtv-commits] Ticket #4609: Scheduler speedup - SQL with negative values on unsigned int columns.

[MythTV]

#4609: Scheduler speedup - SQL with negative values on unsigned int columns.
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 Reporter:  Mark Buechler <Mark.Buechler at gmail.com>  |        Owner:  ijr    
     Type:  patch                                    |       Status:  closed 
 Priority:  minor                                    |    Milestone:  unknown
Component:  mythtv                                   |      Version:  head   
 Severity:  medium                                   |   Resolution:  fixed  
  Mlocked:  0                                        |  
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Changes (by gigem):

  * status:  new => closed
  * resolution:  => fixed


Comment:

 (In [15829]) Quick work around for a database inefficiency when comparing
 unsigned,
 recordid values to the wildcard, recordid of -1.  This appears to
 cause MySQL to ignore or not be able to use some table indices.  This
 change customizes the affected queries to act on all recordids or the
 specified one as needed.  It is partly based on the patch by Mark
 Buechler.

 An alternative approach to consider for longer term is to change the
 database schema to use signed recordids.  PI::recordid is signed so
 there's already a lurking problem, though, I don't expect anyone, not
 even bjm, to ever use > 2^31 recordids.

 Closes #4609.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/4609#comment:1>
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