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While a normal SELECT statement can contain a GROUP BY clause, a cursor
declaration cannot. This was not the case in PG-1.0. Was there a good
reason why this was changed? Are cursors being phased out? Is there any way
to get data with just a SELECT (and without a DECLARE CURSOR ...)?

The patch below seems to fix things. If anyone can see a problem with it,
please let me know. Thanks.

Submitted by:  David Smith <dasmith@perseus.tufts.edu>
This commit is contained in:
Marc G. Fournier 1996-08-06 16:27:59 +00:00
parent c4e53a1411
commit ab22b34891
3 changed files with 11 additions and 5 deletions
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3
src/backend/nodes/parsenodes.h
View File

@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parsenodes.h,v 1.1.1.1 1996/07/09 06:21:33 scrappy Exp $
* $Id: parsenodes.h,v 1.2 1996/08/06 16:27:48 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -462,6 +462,7 @@ typedef struct CursorStmt {
List *targetList; /* the target list (of ResTarget) */
List *fromClause; /* the from clause */
Node *whereClause; /* qualifications */
List *groupClause; /* group by clause */
List *orderClause; /* sort clause (a list of SortBy's) */
} CursorStmt;

6
src/backend/parser/analyze.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.3 1996/07/20 07:58:04 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.4 1996/08/06 16:27:56 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -509,6 +509,10 @@ transformCursorStmt(ParseState *pstate, CursorStmt *stmt)
qry->sortClause = transformSortClause(stmt->orderClause,
qry->targetList,
qry->uniqueFlag);
/* fix group by clause */
qry->groupClause = transformGroupClause(pstate,
stmt->groupClause);
qry->rtable = pstate->p_rtable;
if (pstate->p_numAgg > 0)

7
src/backend/parser/gram.y
View File

@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.2 1996/07/23 02:23:33 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.3 1996/08/06 16:27:59 scrappy Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -1349,7 +1349,7 @@ ReplaceStmt: UPDATE relation_name
CursorStmt: DECLARE name opt_binary CURSOR FOR
SELECT opt_unique res_target_list2
from_clause where_clause sort_clause
from_clause where_clause group_clause sort_clause
{
CursorStmt *n = makeNode(CursorStmt);
@ -1370,7 +1370,8 @@ CursorStmt: DECLARE name opt_binary CURSOR FOR
n->targetList = $8;
n->fromClause = $9;
n->whereClause = $10;
n->orderClause = $11;
n->groupClause = $11;
n->orderClause = $12;
$$ = (Node *)n;
}
;