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WITH CHECK OPTION support for auto-updatable VIEWs

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For simple views which are automatically updatable, this patch allows
the user to specify what level of checking should be done on records
being inserted or updated.  For 'LOCAL CHECK', new tuples are validated
against the conditionals of the view they are being inserted into, while
for 'CASCADED CHECK' the new tuples are validated against the
conditionals for all views involved (from the top down).

This option is part of the SQL specification.

Dean Rasheed, reviewed by Pavel Stehule
This commit is contained in:
Stephen Frost
2013-07-18 17:10:16 -04:00
parent 6f9e39bc99
commit 4cbe3ac3e8
33 changed files with 1245 additions and 107 deletions
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15
src/backend/optimizer/plan/createplan.c
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@ -4702,16 +4702,16 @@ make_result(PlannerInfo *root,
* Build a ModifyTable plan node
*
* Currently, we don't charge anything extra for the actual table modification
* work, nor for the RETURNING expressions if any. It would only be window
* dressing, since these are always top-level nodes and there is no way for
* the costs to change any higher-level planning choices. But we might want
* to make it look better sometime.
* work, nor for the WITH CHECK OPTIONS or RETURNING expressions if any. It
* would only be window dressing, since these are always top-level nodes and
* there is no way for the costs to change any higher-level planning choices.
* But we might want to make it look better sometime.
*/
ModifyTable *
make_modifytable(PlannerInfo *root,
CmdType operation, bool canSetTag,
List *resultRelations,
List *subplans, List *returningLists,
List *resultRelations, List *subplans,
List *withCheckOptionLists, List *returningLists,
List *rowMarks, int epqParam)
{
ModifyTable *node = makeNode(ModifyTable);
@ -4723,6 +4723,8 @@ make_modifytable(PlannerInfo *root,
int i;
Assert(list_length(resultRelations) == list_length(subplans));
Assert(withCheckOptionLists == NIL ||
list_length(resultRelations) == list_length(withCheckOptionLists));
Assert(returningLists == NIL ||
list_length(resultRelations) == list_length(returningLists));
@ -4759,6 +4761,7 @@ make_modifytable(PlannerInfo *root,
node->resultRelations = resultRelations;
node->resultRelIndex = -1; /* will be set correctly in setrefs.c */
node->plans = subplans;
node->withCheckOptionLists = withCheckOptionLists;
node->returningLists = returningLists;
node->rowMarks = rowMarks;
node->epqParam = epqParam;