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Change scoping of table and join refnames to conform to SQL92: a JOIN

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clause with an alias is a <subquery> and therefore hides table references
appearing within it, according to the spec.  This is the same as the
preliminary patch I posted to pgsql-patches yesterday, plus some really
grotty code in ruleutils.c to reverse-list a query tree with the correct
alias name depending on context.  I'd rather not have done that, but unless
we want to force another initdb for 7.1, there's no other way for now.
This commit is contained in:
Tom Lane
2001-02-14 21:35:07 +00:00
parent d42d31e78e
commit 4a66f9dd54
16 changed files with 853 additions and 501 deletions
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13
src/include/parser/parse_relation.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_relation.h,v 1.21 2001/01/24 19:43:27 momjian Exp $
* $Id: parse_relation.h,v 1.22 2001/02/14 21:35:06 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -19,15 +19,11 @@
extern Node *refnameRangeOrJoinEntry(ParseState *pstate,
char *refname,
int *sublevels_up);
extern RangeTblEntry *refnameRangeTableEntry(ParseState *pstate,
char *refname);
extern int refnameRangeTablePosn(ParseState *pstate,
char *refname,
int *sublevels_up);
extern void checkNameSpaceConflicts(ParseState *pstate, Node *namespace1,
Node *namespace2);
extern int RTERangeTablePosn(ParseState *pstate,
RangeTblEntry *rte,
int *sublevels_up);
extern JoinExpr *scanJoinListForRefname(Node *jtnode, char *refname);
extern Node *colnameToVar(ParseState *pstate, char *colname);
extern Node *qualifiedNameToVar(ParseState *pstate, char *refname,
char *colname, bool implicitRTEOK);
@ -40,7 +36,8 @@ extern RangeTblEntry *addRangeTableEntryForSubquery(ParseState *pstate,
Query *subquery,
Attr *alias,
bool inFromCl);
extern void addRTEtoJoinList(ParseState *pstate, RangeTblEntry *rte);
extern void addRTEtoQuery(ParseState *pstate, RangeTblEntry *rte,
bool addToJoinList, bool addToNameSpace);
extern RangeTblEntry *addImplicitRTE(ParseState *pstate, char *relname);
extern void expandRTE(ParseState *pstate, RangeTblEntry *rte,
List **colnames, List **colvars);