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setRuleCheckAsUser has to be applied to any subqueries appearing in a

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rule's event_qual, not only to the rule's action.  Per example from
Arturs Zoldners.
This commit is contained in:
Tom Lane
2004-05-18 22:49:51 +00:00
parent 4c82cb9d40
commit 07f2b767dc
1 changed files with 17 additions and 8 deletions
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25
src/backend/rewrite/rewriteDefine.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.93 2004/02/10 01:55:25 tgl Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.94 2004/05/18 22:49:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -33,7 +33,8 @@
#include "utils/syscache.h"
static void setRuleCheckAsUser(Query *qry, AclId userid);
static void setRuleCheckAsUser_Query(Query *qry, AclId userid);
static void setRuleCheckAsUser_Expr(Node *node, AclId userid);
static bool setRuleCheckAsUser_walker(Node *node, AclId *context);
@@ -440,13 +441,15 @@ DefineQueryRewrite(RuleStmt *stmt)
* We want the rule's table references to be checked as though by the
* rule owner, not the user referencing the rule. Therefore, scan
* through the rule's rtables and set the checkAsUser field on all
* rtable entries.
* rtable entries. We have to look at event_qual as well, in case
* it contains sublinks.
*/
foreach(l, action)
{
query = (Query *) lfirst(l);
setRuleCheckAsUser(query, GetUserId());
setRuleCheckAsUser_Query(query, GetUserId());
}
setRuleCheckAsUser_Expr(event_qual, GetUserId());
/* discard rule if it's null action and not INSTEAD; it's a no-op */
if (action != NIL || is_instead)
@@ -492,7 +495,7 @@ DefineQueryRewrite(RuleStmt *stmt)
}
/*
* setRuleCheckAsUser
* setRuleCheckAsUser_Query
* Recursively scan a query and set the checkAsUser field to the
* given userid in all rtable entries.
*
@@ -504,7 +507,7 @@ DefineQueryRewrite(RuleStmt *stmt)
* them always.
*/
static void
setRuleCheckAsUser(Query *qry, AclId userid)
setRuleCheckAsUser_Query(Query *qry, AclId userid)
{
List *l;
@@ -516,7 +519,7 @@ setRuleCheckAsUser(Query *qry, AclId userid)
if (rte->rtekind == RTE_SUBQUERY)
{
/* Recurse into subquery in FROM */
setRuleCheckAsUser(rte->subquery, userid);
setRuleCheckAsUser_Query(rte->subquery, userid);
}
else
rte->checkAsUser = userid;
@@ -532,6 +535,12 @@ setRuleCheckAsUser(Query *qry, AclId userid)
/*
* Expression-tree walker to find sublink queries
*/
static void
setRuleCheckAsUser_Expr(Node *node, AclId userid)
{
(void) setRuleCheckAsUser_walker(node, &userid);
}
static bool
setRuleCheckAsUser_walker(Node *node, AclId *context)
{
@@ -541,7 +550,7 @@ setRuleCheckAsUser_walker(Node *node, AclId *context)
{
Query *qry = (Query *) node;
setRuleCheckAsUser(qry, *context);
setRuleCheckAsUser_Query(qry, *context);
return false;
}
return expression_tree_walker(node, setRuleCheckAsUser_walker,