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Commit3276e91

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When building a bitmap scan, must copy the bitmapqualorig expression tree
to avoid sharing substructure with the lower-level indexquals. This iscurrently only an issue if there are SubPlans in the indexquals, which isuncommon but not impossible --- see bug #2218 reported by Nicholas Vinen.We use the same kluge for indexqual vs indexqualorig in the index scansthemselves ... would be nice to clean this up someday.
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‎src/backend/optimizer/plan/createplan.c

Lines changed: 7 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.206 2006/01/25 20:29:23 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.207 2006/01/29 18:55:48 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
@@ -963,6 +963,12 @@ create_bitmap_scan_plan(PlannerInfo *root,
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*/
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bitmapqualorig=list_difference_ptr(bitmapqualorig,qpqual);
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/*
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* Copy the finished bitmapqualorig to make sure we have an independent
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* copy --- needed in case there are subplans in the index quals
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*/
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bitmapqualorig=copyObject(bitmapqualorig);
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/* Finally ready to build the plan node */
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scan_plan=make_bitmap_heapscan(tlist,
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qpqual,

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