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SELECT FOR UPDATE syntax

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This commit is contained in:
Vadim B. Mikheev 1999-01-05 15:46:25 +00:00
parent b5626a2089
commit dfa23f5e41
3 changed files with 4086 additions and 4068 deletions
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8114
src/backend/parser/gram.c
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File diff suppressed because it is too large Load Diff

37
src/backend/parser/gram.y
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.41 1998/12/30 19:56:28 wieck Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.42 1999/01/05 15:46:25 vadim Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -174,7 +174,7 @@ Oid param_type(int t); /* used in parse_expr.c */
%type <boolean> TriggerForOpt, TriggerForType
%type <list> union_clause, select_list
%type <list> union_clause, select_list, for_update_clause
%type <list> join_list
%type <joinusing>
join_using
@ -2215,6 +2215,8 @@ ViewStmt: CREATE VIEW name AS SelectStmt
elog(ERROR,"Order by and Distinct on views is not implemented.");
if (((SelectStmt *)n->query)->unionClause != NULL)
elog(ERROR,"Views on unions not implemented.");
if (((SelectStmt *)n->query)->forUpdate != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed in CREATE VIEW");
$$ = (Node *)n;
}
;
@ -2677,7 +2679,7 @@ opt_of: OF columnList
SelectStmt: SELECT opt_unique res_target_list2
result from_clause where_clause
group_clause having_clause
union_clause sort_clause
union_clause sort_clause for_update_clause
{
SelectStmt *n = makeNode(SelectStmt);
n->unique = $2;
@ -2689,7 +2691,20 @@ SelectStmt: SELECT opt_unique res_target_list2
n->havingClause = $8;
n->unionClause = $9;
n->sortClause = $10;
$$ = (Node *)n;
n->forUpdate = $11;
if (n->forUpdate != NULL)
{
if (n->unionClause != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed with UNION clause");
if (n->unique != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed with DISTINCT clause");
if (n->groupClause != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed with GROUP BY clause");
if (n->havingClause != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed with HAVING clause");
}
else
$$ = (Node *)n;
}
;
@ -2818,6 +2833,20 @@ having_clause: HAVING a_expr
| /*EMPTY*/ { $$ = NULL; }
;
for_update_clause:
FOR UPDATE
{
$$ = lcons(NULL, NULL);
}
| FOR UPDATE OF va_list
{
$$ = $4;
}
| /* EMPTY */
{
$$ = NULL;
}
;
/*****************************************************************************
*

3
src/include/nodes/parsenodes.h
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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parsenodes.h,v 1.64 1998/12/21 12:50:29 wieck Exp $
* $Id: parsenodes.h,v 1.65 1999/01/05 15:45:49 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -653,6 +653,7 @@ typedef struct SelectStmt
bool unionall; /* union without unique sort */
Node *limitOffset; /* # of result tuples to skip */
Node *limitCount; /* # of result tuples to return */
List *forUpdate; /* FOR UPDATE clause */
} SelectStmt;