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Get rid of adjust_appendrel_attr_needed(), which has been broken ever since

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we extended the appendrel mechanism to support UNION ALL optimization.  The
reason nobody noticed was that we are not actually using attr_needed data for
appendrel children; hence it seems more reasonable to rip it out than fix it.
Back-patch to 8.2 because an Assert failure is possible in corner cases.
Per examination of an example from Jim Nasby.

In HEAD, also get rid of AppendRelInfo.col_mappings, which is quite inadequate
to represent UNION ALL situations; depend entirely on translated_vars instead.
This commit is contained in:
Tom Lane
2008-11-11 18:13:32 +00:00
parent ccc9073f26
commit 0436679969
8 changed files with 46 additions and 146 deletions
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3
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.343 2008/10/21 20:42:52 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.344 2008/11/11 18:13:32 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -1628,7 +1628,6 @@ _outAppendRelInfo(StringInfo str, AppendRelInfo *node)
WRITE_UINT_FIELD(child_relid);
WRITE_OID_FIELD(parent_reltype);
WRITE_OID_FIELD(child_reltype);
WRITE_NODE_FIELD(col_mappings);
WRITE_NODE_FIELD(translated_vars);
WRITE_OID_FIELD(parent_reloid);
}