1berry/postgres
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
postgres/src/include/parser/parse_clause.h

35 lines
1.2 KiB
C
Raw Normal View History

Break parser functions into smaller files, group together.
1997-11-25 22:07:18 +00:00
/*-------------------------------------------------------------------------
*
* parse_clause.h
*
*
*
Update copyright to 2002.
2002-06-20 20:29:54 +00:00
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
Add: * Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files.
2000-01-26 05:58:53 +00:00
* Portions Copyright (c) 1994, Regents of the University of California
Break parser functions into smaller files, group together.
1997-11-25 22:07:18 +00:00
*
Update copyright to 2002.
2002-06-20 20:29:54 +00:00
* $Id: parse_clause.h,v 1.29 2002/06/20 20:29:51 momjian Exp $
Break parser functions into smaller files, group together.
1997-11-25 22:07:18 +00:00
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_CLAUSE_H
#define PARSE_CLAUSE_H
Change #include's to use <> and "" as appropriate.
1999-07-15 23:04:24 +00:00
#include "parser/parse_node.h"
Break parser functions into smaller files, group together.
1997-11-25 22:07:18 +00:00
Change scoping of table and join refnames to conform to SQL92: a JOIN 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.
2001-02-14 21:35:07 +00:00
extern void transformFromClause(ParseState *pstate, List *frmList);
A little further progress on schemas: push down RangeVars into addRangeTableEntry calls. Remove relname field from RTEs, since it will no longer be a useful unique identifier of relations; we want to encourage people to rely on the relation OID instead. Further work on dumping qual expressions in EXPLAIN, too.
2002-03-22 02:56:37 +00:00
extern int setTargetTable(ParseState *pstate, RangeVar *relation,
pgindent run. Make it all clean.
2001-03-22 04:01:46 +00:00
bool inh, bool alsoSource);
Remove not-really-standard implementation of CREATE TABLE's UNDER clause, and revert documentation to describe the existing INHERITS clause instead, per recent discussion in pghackers. Also fix implementation of SQL_inheritance SET variable: it is not cool to look at this var during the initial parsing phase, only during parse_analyze(). See recent bug report concerning misinterpretation of date constants just after a SET TIMEZONE command. gram.y really has to be an invariant transformation of the query string to a raw parsetree; anything that can vary with time must be done during parse analysis.
2001-01-05 06:34:23 +00:00
extern bool interpretInhOption(InhOption inhOpt);
Carry column aliases from the parser frontend. Enables queries like SELECT a FROM t1 tx (a); Allow join syntax, including queries like SELECT * FROM t1 NATURAL JOIN t2; Update RTE structure to hold column aliases in an Attr structure.
2000-02-15 03:38:29 +00:00
extern Node *transformWhereClause(ParseState *pstate, Node *where);
OK, folks, here is the pgindent output.
1998-09-01 04:40:42 +00:00
extern List *transformGroupClause(ParseState *pstate, List *grouplist,
Ye-old pgindent run. Same 4-space tabs.
2000-04-12 17:17:23 +00:00
List *targetlist);
Major revision of sort-node handling: push knowledge of query sort order down into planner, instead of handling it only at the very top level of the planner. This fixes many things. An explicit sort is now avoided if there is a cheaper alternative (typically an indexscan) not only for ORDER BY, but also for the internal sort of GROUP BY. It works even when there is no other reason (such as a WHERE condition) to consider the indexscan. It works for indexes on functions. It works for indexes on functions, backwards. It's just so cool... CAUTION: I have changed the representation of SortClause nodes, therefore THIS UPDATE BREAKS STORED RULES. You will need to initdb.
1999-08-21 03:49:17 +00:00
extern List *transformSortClause(ParseState *pstate, List *orderlist,
Ye-old pgindent run. Same 4-space tabs.
2000-04-12 17:17:23 +00:00
List *targetlist);
Redesign DISTINCT ON as discussed in pgsql-sql 1/25/00: syntax is now SELECT DISTINCT ON (expr [, expr ...]) targetlist ... and there is a check to make sure that the user didn't specify an ORDER BY that's incompatible with the DISTINCT operation. Reimplement nodeUnique and nodeGroup to use the proper datatype-specific equality function for each column being compared --- they used to do bitwise comparisons or convert the data to text strings and strcmp(). (To add insult to injury, they'd look up the conversion functions once for each tuple...) Parse/plan representation of DISTINCT is now a list of SortClause nodes. initdb forced by querytree change...
2000-01-27 18:11:50 +00:00
extern List *transformDistinctClause(ParseState *pstate, List *distinctlist,
Ye-old pgindent run. Same 4-space tabs.
2000-04-12 17:17:23 +00:00
List *targetlist, List **sortClause);
Major revision of sort-node handling: push knowledge of query sort order down into planner, instead of handling it only at the very top level of the planner. This fixes many things. An explicit sort is now avoided if there is a cheaper alternative (typically an indexscan) not only for ORDER BY, but also for the internal sort of GROUP BY. It works even when there is no other reason (such as a WHERE condition) to consider the indexscan. It works for indexes on functions. It works for indexes on functions, backwards. It's just so cool... CAUTION: I have changed the representation of SortClause nodes, therefore THIS UPDATE BREAKS STORED RULES. You will need to initdb.
1999-08-21 03:49:17 +00:00
extern List *addAllTargetsToSortList(List *sortlist, List *targetlist);
extern Index assignSortGroupRef(TargetEntry *tle, List *tlist);
Another pgindent run. Fixes enum indenting, and improves #endif spacing. Also adds space for one-line comments.
2001-10-28 06:26:15 +00:00
New pgindent run with fixes suggested by Tom. Patch manually reviewed, initdb/regression tests pass.
2001-11-05 17:46:40 +00:00
#endif /* PARSE_CLAUSE_H */
Reference in New Issue Copy Permalink