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postgresql/src/include/parser/parse_target.h

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Break parser functions into smaller files, group together.
1997-11-25 23:07:18 +01:00
/*-------------------------------------------------------------------------
*
* parse_target.h
*
*
*
* Copyright (c) 1994, Regents of the University of California
*
Make sure resdomno for update/insert match attribute number for rewrite system. Restructure parse_target to make it easier to understand.
1998-08-25 05:17:29 +02:00
* $Id: parse_target.h,v 1.10 1998/08/25 03:17:29 momjian Exp $
Break parser functions into smaller files, group together.
1997-11-25 23:07:18 +01:00
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_TARGET_H
#define PARSE_TARGET_H
#include <nodes/pg_list.h>
#include <nodes/nodes.h>
#include <nodes/parsenodes.h>
#include <nodes/primnodes.h>
#include <parser/parse_node.h>
#define EXPR_COLUMN_FIRST 1
pgindent run before 6.3 release, with Thomas' requested changes.
1998-02-26 05:46:47 +01:00
#define EXPR_RELATION_FIRST 2
Break parser functions into smaller files, group together.
1997-11-25 23:07:18 +01:00
Cleanup up include files.
1997-11-26 02:14:33 +01:00
extern List *transformTargetList(ParseState *pstate, List *targetlist);
extern List *makeTargetNames(ParseState *pstate, List *cols);
Include int8 as a built-in data type. Merge "resjunk" handling with automatic type conversion when selecting from another column.
1998-07-08 16:18:45 +02:00
extern TargetEntry *
Make sure resdomno for update/insert match attribute number for rewrite system. Restructure parse_target to make it easier to understand.
1998-08-25 05:17:29 +02:00
MakeTargetEntryIdent(ParseState *pstate,
Include int8 as a built-in data type. Merge "resjunk" handling with automatic type conversion when selecting from another column.
1998-07-08 16:18:45 +02:00
Node *node,
char **resname,
char *refname,
char *colname,
int16 resjunk);
extern Node *
CoerceTargetExpr(ParseState *pstate, Node *expr,
Oid type_id, Oid attrtype);
Make sure resdomno for update/insert match attribute number for rewrite system. Restructure parse_target to make it easier to understand.
1998-08-25 05:17:29 +02:00
TargetEntry * MakeTargetEntryExpr(ParseState *pstate,
From: David Hartwig <daybee@bellatlantic.net> I have attached a patch to allow GROUP BY and/or ORDER BY function or expressions. Note worthy items: 1. The expression or function need not be in the target list. Example: SELECT name FROM foo GROUP BY lower(name); 2. Simplified the grammar to use expressions only. 3. Cleaned up earlier patch in this area to make use of existing utility functions. 3. Reduced some of the members in the SortGroupBy parse node. The original data members were redundant with the new expression node. (MUST do a "make clean" now) 4. Added a new parse node "JoinUsing". The JOIN USING clause was overloading this SortGroupBy structure. With the afore mentioned reduction of members, the two clauses lost all their commonality. 5. A bug still exist where, if a function or expression is GROUPed BY, and an aggregate function does not include a attribute from the expression or function, the backend crashes. (or something like that) The bug pre-dates this patch. Example: SELECT lower(a) AS lowcase, count(b) FROM foo GROUP BY lowcase; *** BOOM *** --Also when not in target list SELECT count(b) FROM foo GROUP BY lower(a); *** BOOM AGAIN ***
1998-08-05 06:49:19 +02:00
char *colname,
Node *expr,
List *arrayRef,
int16 resjunk);
Break parser functions into smaller files, group together.
1997-11-25 23:07:18 +01:00
#endif /* PARSE_TARGET_H */