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Fixed shift/reduce conflict

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SelectStmt and CursorStmt tried to parse FOR UPDATE ... / FOR READ ONLY.
Cursor now checks that it is read only by looking at forUpdate of Query.
SelectStmt handles FOR READ ONLY too.

Jan
This commit is contained in:
Jan Wieck 1999-05-20 12:12:55 +00:00
parent 1f82f1de33
commit 443c08a110
1 changed files with 7 additions and 21 deletions
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28
src/backend/parser/gram.y
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.78 1999/05/19 17:53:10 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.79 1999/05/20 12:12:55 wieck Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -196,7 +196,7 @@ Oid param_type(int t); /* used in parse_expr.c */
%type <boolean> opt_inh_star, opt_binary, opt_instead, opt_with_copy,
index_opt_unique, opt_verbose, opt_analyze
%type <boolean> cursor_clause, opt_cursor, opt_readonly, opt_of
%type <boolean> opt_cursor
%type <ival> copy_dirn, def_type, opt_direction, remove_type,
opt_column, event
@ -2646,7 +2646,7 @@ UpdateStmt: UPDATE relation_name
*
*****************************************************************************/
/***S*I***/
CursorStmt: DECLARE name opt_cursor CURSOR FOR SelectStmt cursor_clause
CursorStmt: DECLARE name opt_cursor CURSOR FOR SelectStmt
{
SelectStmt *n;
@ -2664,6 +2664,9 @@ CursorStmt: DECLARE name opt_cursor CURSOR FOR SelectStmt cursor_clause
n->portalname = $2;
n->binary = $3;
if (n->forUpdate != NULL)
elog(ERROR,"DECLARE/UPDATE not supported;"
" Cursors must be READ ONLY.");
$$ = (Node *)n;
}
;
@ -2675,24 +2678,6 @@ opt_cursor: BINARY { $$ = TRUE; }
| /*EMPTY*/ { $$ = FALSE; }
;
cursor_clause: FOR opt_readonly { $$ = $2; }
| /*EMPTY*/ { $$ = FALSE; }
;
opt_readonly: READ ONLY { $$ = TRUE; }
| UPDATE opt_of
{
elog(ERROR,"DECLARE/UPDATE not supported;"
" Cursors must be READ ONLY.");
$$ = FALSE;
}
;
opt_of: OF columnList
{
$$ = FALSE;
}
/*****************************************************************************
*
* QUERY:
@ -3007,6 +2992,7 @@ having_clause: HAVING a_expr
;
for_update_clause: FOR UPDATE update_list { $$ = $3; }
| FOR READ ONLY { $$ = NULL; }
| /* EMPTY */ { $$ = NULL; }
;