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Disable the recently-added use_physical_tlist optimization in cases

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where the table contains dropped columns.  If the columns are dropped,
then their types may be gone as well, which causes ExecTypeFromTL() to
fail if the dropped columns appear in a plan node's tlist.  This could
be worked around but I don't think the optimization is valuable enough
to be worth the trouble.
This commit is contained in:
Tom Lane
2003-05-11 15:03:52 +00:00
parent a4e775a263
commit 8f2e53bc10
2 changed files with 24 additions and 4 deletions
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8
src/backend/optimizer/plan/createplan.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.139 2003/05/06 00:20:32 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.140 2003/05/11 15:03:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -295,6 +295,12 @@ use_physical_tlist(RelOptInfo *rel)
*/
if (rel->reloptkind != RELOPT_BASEREL)
return false;
/*
* Can't do it if relation contains dropped columns. This is detected
* in plancat.c, see notes there.
*/
if (rel->varlist == NIL)
return false;
/*
* Can't do it if any system columns are requested, either. (This could
* possibly be fixed but would take some fragile assumptions in setrefs.c,