Bugs item #2757104, was opened at 2009-04-13 02:01
Message generated for change (Comment added) made by tsheyar
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Category: PF/compiler
Group: Pathfinder CVS Head
Status: Open
>Resolution: Postponed
Priority: 5
Private: No
Submitted By: Peter Boncz (boncz)
Assigned to: Jan Rittinger (tsheyar)
Summary: xiraf and other test queries fail  (Y option)

Initial Comment:
XIRAF test queries 5 and 8 fail now

http://wiki.pathfinder-xquery.org/wiki/index.php/XIRAF_testdata

this can be circumvented by disabling a compile option (Y) in compile.c and 
recompiling, but should be fixed.

bug report just as a reminder (can't we at least switch off Y by default 
though??)


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>Comment By: Jan Rittinger (tsheyar)
Date: 2009-04-13 10:56

Message:
In both example queries I can see no mistake. Option Y only provides plans
that the physical planner has problems with---the staircase join algorithms
are (unnecessarily) called with unique iter values.

The solution (hopefully) will come soon: a MonetDB specific optimization
that hides part of the job of optimization Y.

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You can respond by visiting: 
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