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Replace the parser's namespace tree (which formerly had the same

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representation as the jointree) with two lists of RTEs, one showing
the RTEs accessible by qualified names, and the other showing the RTEs
accessible by unqualified names.  I think this is conceptually simpler
than what we did before, and it's sure a whole lot easier to search.
This seems to eliminate the parse-time bottleneck for deeply nested
JOIN structures that was exhibited by phil@vodafone.
This commit is contained in:
Tom Lane
2005-06-05 00:38:11 +00:00
parent efe0d0808b
commit a4996a8953
10 changed files with 339 additions and 497 deletions
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9
src/include/parser/parse_relation.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/parser/parse_relation.h,v 1.50 2005/06/04 19:19:42 tgl Exp $
* $PostgreSQL: pgsql/src/include/parser/parse_relation.h,v 1.51 2005/06/05 00:38:11 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -22,8 +22,8 @@ extern RangeTblEntry *refnameRangeTblEntry(ParseState *pstate,
const char *schemaname,
const char *refname,
int *sublevels_up);
extern void checkNameSpaceConflicts(ParseState *pstate, Node *namespace1,
Node *namespace2);
extern void checkNameSpaceConflicts(ParseState *pstate, List *namespace1,
List *namespace2);
extern int RTERangeTablePosn(ParseState *pstate,
RangeTblEntry *rte,
int *sublevels_up);
@ -64,7 +64,8 @@ extern RangeTblEntry *addRangeTableEntryForJoin(ParseState *pstate,
Alias *alias,
bool inFromCl);
extern void addRTEtoQuery(ParseState *pstate, RangeTblEntry *rte,
bool addToJoinList, bool addToNameSpace);
bool addToJoinList,
bool addToRelNameSpace, bool addToVarNameSpace);
extern RangeTblEntry *addImplicitRTE(ParseState *pstate, RangeVar *relation);
extern void expandRTE(RangeTblEntry *rte, int rtindex, int sublevels_up,
bool include_dropped,