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ALTER TABLE .. FORCE ROW LEVEL SECURITY

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To allow users to force RLS to always be applied, even for table owners,
add ALTER TABLE .. FORCE ROW LEVEL SECURITY.

row_security=off overrides FORCE ROW LEVEL SECURITY, to ensure pg_dump
output is complete (by default).

Also add SECURITY_NOFORCE_RLS context to avoid data corruption when
ALTER TABLE .. FORCE ROW SECURITY is being used. The
SECURITY_NOFORCE_RLS security context is used only during referential
integrity checks and is only considered in check_enable_rls() after we
have already checked that the current user is the owner of the relation
(which should always be the case during referential integrity checks).

Back-patch to 9.5 where RLS was added.
This commit is contained in:
Stephen Frost
2015-10-04 21:05:08 -04:00
parent 16a70e3059
commit 088c83363a
19 changed files with 537 additions and 64 deletions
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14
src/backend/parser/gram.y
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@ -2353,6 +2353,20 @@ alter_table_cmd:
n->subtype = AT_DisableRowSecurity;
$$ = (Node *)n;
}
/* ALTER TABLE <name> FORCE ROW LEVEL SECURITY */
| FORCE ROW LEVEL SECURITY
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_ForceRowSecurity;
$$ = (Node *)n;
}
/* ALTER TABLE <name> NO FORCE ROW LEVEL SECURITY */
| NO FORCE ROW LEVEL SECURITY
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_NoForceRowSecurity;
$$ = (Node *)n;
}
| alter_generic_options
{
AlterTableCmd *n = makeNode(AlterTableCmd);