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Get rid of crocky use of RangeVar nodes in parser to represent partially

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transformed whole-row variables.  Cleaner to use regular whole-row Vars.
This commit is contained in:
Tom Lane
2004-04-02 19:07:02 +00:00
parent 94d8da8fec
commit 27a4f06ade
6 changed files with 228 additions and 294 deletions
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24
src/backend/parser/parse_relation.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_relation.c,v 1.92 2004/01/14 23:01:55 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_relation.c,v 1.93 2004/04/02 19:06:58 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -41,8 +41,6 @@ static Node *scanNameSpaceForRelid(ParseState *pstate, Node *nsnode,
Oid relid);
static void scanNameSpaceForConflict(ParseState *pstate, Node *nsnode,
RangeTblEntry *rte1, const char *aliasname1);
static Node *scanRTEForColumn(ParseState *pstate, RangeTblEntry *rte,
char *colname);
static bool isForUpdate(ParseState *pstate, char *refname);
static bool get_rte_attribute_is_dropped(RangeTblEntry *rte,
AttrNumber attnum);
@ -424,6 +422,24 @@ RTERangeTablePosn(ParseState *pstate, RangeTblEntry *rte, int *sublevels_up)
return 0; /* keep compiler quiet */
}
/*
* Given an RT index and nesting depth, find the corresponding RTE.
* This is the inverse of RTERangeTablePosn.
*/
RangeTblEntry *
GetRTEByRangeTablePosn(ParseState *pstate,
int varno,
int sublevels_up)
{
while (sublevels_up-- > 0)
{
pstate = pstate->parentParseState;
Assert(pstate != NULL);
}
Assert(varno > 0 && varno <= length(pstate->p_rtable));
return rt_fetch(varno, pstate->p_rtable);
}
/*
* scanRTEForColumn
* Search the column names of a single RTE for the given name.
@ -439,7 +455,7 @@ RTERangeTablePosn(ParseState *pstate, RangeTblEntry *rte, int *sublevels_up)
* expression can only appear in a FROM clause, and any table named in
* FROM will be marked as requiring read access from the beginning.
*/
static Node *
Node *
scanRTEForColumn(ParseState *pstate, RangeTblEntry *rte, char *colname)
{
Node *result = NULL;