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SELECT FOR UPDATE is implemented...

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This commit is contained in:
Vadim B. Mikheev
1999-01-25 12:01:19 +00:00
parent 443e24beb7
commit 247b3f9054
7 changed files with 715 additions and 581 deletions
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20
src/backend/parser/analyze.c
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@ -5,7 +5,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: analyze.c,v 1.94 1999/01/21 22:48:07 momjian Exp $
* $Id: analyze.c,v 1.95 1999/01/25 12:01:05 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -45,7 +45,8 @@ static Query *transformUpdateStmt(ParseState *pstate, UpdateStmt *stmt);
static Query *transformCursorStmt(ParseState *pstate, SelectStmt *stmt);
static Query *transformCreateStmt(ParseState *pstate, CreateStmt *stmt);
static void transformForUpdate(Query *qry, List *forUpdate);
static void transformForUpdate(Query *qry, List *forUpdate);
void CheckSelectForUpdate(Query *qry);
List *extras_before = NIL;
List *extras_after = NIL;
@ -1134,6 +1135,19 @@ Node *A_Expr_to_Expr(Node *ptr, bool *intersect_present)
return result;
}
void
CheckSelectForUpdate(Query *qry)
{
if (qry->unionClause != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed with UNION/INTERSECT/EXCEPT clause");
if (qry->uniqueFlag != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed with DISTINCT clause");
if (qry->groupClause != NULL)
elog(ERROR, "SELECT FOR UPDATE is not allowed with GROUP BY clause");
if (qry->hasAggs)
elog(ERROR, "SELECT FOR UPDATE is not allowed with AGGREGATE");
}
static void
transformForUpdate(Query *qry, List *forUpdate)
{
@ -1142,6 +1156,8 @@ transformForUpdate(Query *qry, List *forUpdate)
List *l;
Index i;
CheckSelectForUpdate(qry);
if (lfirst(forUpdate) == NULL) /* all tables */
{
i = 1;