New subject: [Monetdb-developers] [Monetdb-pf-checkins] pathfinder/compiler/algebra/opt opt_join_pd.c, XQuery_0-24, 1.46.2.1, 1.46.2.2

2 Jun 2008

Jan, Sjoerd,

I'll take care of these.

Sjoerd,
please do not propagate until I'm done.

Stefan


On Mon, Jun 02, 2008 at 08:44:32AM +0000, Jan Rittinger wrote:
...
Update of /cvsroot/monetdb/pathfinder/compiler/algebra/opt
In directory sc8-pr-cvs16.sourceforge.net:/tmp/cvs-serv1643/algebra/opt
Modified Files:
      Tag: XQuery_0-24
  opt_join_pd.c 
Log Message:
-- circumvent bugs #1981491 and #1908822 for the release.
This 'hack' does not fix the real problem (that we have to get rid
   of bit-encoded column names), but just disables some optimizations
   in case we might get into trouble. Thus we can apply less rewrites
   and get 'suboptimal' plans.
THIS IS A RELEASE ONLY CHECKIN --- PLEASE DO NOT PROPAGATE!
U opt_join_pd.c
Index: opt_join_pd.c
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/algebra/opt/opt_join_pd.c,v
retrieving revision 1.46.2.1
retrieving revision 1.46.2.2
diff -u -d -r1.46.2.1 -r1.46.2.2

--- opt_join_pd.c	28 May 2008 11:37:25 -0000	1.46.2.1
+++ opt_join_pd.c	2 Jun 2008 08:44:30 -0000	1.46.2.2
@@ -580,6 +580,11 @@
             }   break;
case la_project:
+                /* disable rewrite in case we might get wider relations
+                   than we can map back to the bit-encoded (ori) column
+                   names */
+                if (PFarray_last (rproj) + L(lp)->schema.count < 30)
+                    
                 /* Arbitrary projections are pushed through the join operator
                    by:
                    1.) merging the projection lists of the projection
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-- 
| Dr. Stefan Manegold | mailto:Stefan.Manegold@cwi.nl |
| CWI,  P.O.Box 94079 | http://www.cwi.nl/~manegold/  |
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Re: [Monetdb-developers] [Monetdb-pf-checkins] pathfinder/compiler/algebra/opt opt_join_pd.c, XQuery_0-24, 1.46.2.1, 1.46.2.2

Stefan Manegold

Stefan Manegold

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