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Repair some issues with column aliases and RowExpr construction in the

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presence of dropped columns.  Document the already-presumed fact that
eref aliases in relation RTEs are supposed to have entries for dropped
columns; cause the user alias structs to have such entries too, so that
there's always a one-to-one mapping to the underlying physical attnums.
Adjust expandRTE() and related code to handle the case where a column
that is part of a JOIN has been dropped.  Generalize expandRTE()'s API
so that it can be used in a couple of places that formerly rolled their
own implementation of the same logic.  Fix ruleutils.c to suppress
display of aliases for columns that were dropped since the rule was made.
This commit is contained in:
Tom Lane
2004-08-19 20:57:41 +00:00
parent 040450beef
commit bbd6eb5b95
16 changed files with 463 additions and 355 deletions
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4
src/include/parser/parsetree.h
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@@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/parser/parsetree.h,v 1.25 2004/08/17 18:47:09 tgl Exp $
* $PostgreSQL: pgsql/src/include/parser/parsetree.h,v 1.26 2004/08/19 20:57:41 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -59,7 +59,7 @@ extern void get_rte_attribute_type(RangeTblEntry *rte, AttrNumber attnum,
* Check whether an attribute of an RTE has been dropped (note that
* get_rte_attribute_type will fail on such an attr)
*/
extern bool get_rte_attribute_is_dropped(RangeTblEntry *rte,
extern bool get_rte_attribute_is_dropped(List *rtable, int rtindex,
AttrNumber attnum);