(30 rows)
----
----- No. S-3-8 inheritance table select type
+---- No. S-3-8 inheritance table select/update type
----
-- No. S-3-8-1
EXPLAIN (COSTS false) SELECT * FROM ONLY s1.p1 WHERE c1 = 1;
Index Cond: (c1 = 1)
(6 rows)
+-- No. S-3-8-3
+EXPLAIN (COSTS false) UPDATE ONLY s1.p1 SET c4 = c4 WHERE c1 = 1;
+ QUERY PLAN
+--------------------------
+ Update on p1
+ -> Seq Scan on p1
+ Filter: (c1 = 1)
+(3 rows)
+
+/*+IndexScan(p1)*/
+EXPLAIN (COSTS false) UPDATE ONLY s1.p1 SET c4 = c4 WHERE c1 = 1;
+LOG: pg_hint_plan:
+used hint:
+IndexScan(p1)
+not used hint:
+duplication hint:
+error hint:
+
+ QUERY PLAN
+-----------------------------------
+ Update on p1
+ -> Index Scan using p1_i on p1
+ Index Cond: (c1 = 1)
+(3 rows)
+
+/*+IndexScan(p1 p1_pkey)*/
+EXPLAIN (COSTS false) UPDATE ONLY s1.p1 SET c4 = c4 WHERE c1 = 1;
+LOG: available indexes for IndexScan(p1): p1_pkey
+LOG: pg_hint_plan:
+used hint:
+IndexScan(p1 p1_pkey)
+not used hint:
+duplication hint:
+error hint:
+
+ QUERY PLAN
+--------------------------------------
+ Update on p1
+ -> Index Scan using p1_pkey on p1
+ Index Cond: (c1 = 1)
+(3 rows)
+
+-- No. S-3-8-4
+EXPLAIN (COSTS false) UPDATE s1.p1 SET c4 = c4 WHERE c1 = 1;
+ QUERY PLAN
+---------------------------
+ Update on p1
+ -> Seq Scan on p1
+ Filter: (c1 = 1)
+ -> Seq Scan on p1c1 p1
+ Filter: (c1 = 1)
+(5 rows)
+
+/*+IndexScan(p1)*/
+EXPLAIN (COSTS false) UPDATE s1.p1 SET c4 = c4 WHERE c1 = 1;
+LOG: pg_hint_plan:
+used hint:
+IndexScan(p1)
+not used hint:
+duplication hint:
+error hint:
+
+ QUERY PLAN
+------------------------------------------
+ Update on p1
+ -> Index Scan using p1_i on p1
+ Index Cond: (c1 = 1)
+ -> Index Scan using p1c1_i on p1c1 p1
+ Index Cond: (c1 = 1)
+(5 rows)
+
+/*+IndexScan(p1 p1_pkey)*/
+EXPLAIN (COSTS false) UPDATE s1.p1 SET c4 = c4 WHERE c1 = 1;
+LOG: available indexes for IndexScan(p1): p1_pkey
+LOG: available indexes for IndexScan(p1c1): p1c1_pkey
+LOG: available indexes for IndexScan(p1c2): p1c2_pkey
+LOG: available indexes for IndexScan(p1c3): p1c3_pkey
+LOG: pg_hint_plan:
+used hint:
+IndexScan(p1 p1_pkey)
+not used hint:
+duplication hint:
+error hint:
+
+ QUERY PLAN
+---------------------------------------------
+ Update on p1
+ -> Index Scan using p1_pkey on p1
+ Index Cond: (c1 = 1)
+ -> Index Scan using p1c1_pkey on p1c1 p1
+ Index Cond: (c1 = 1)
+(5 rows)
+
----
---- No. S-3-9 inheritance table number
----
* Return scan method hint which matches given aliasname.
*/
static ScanMethodHint *
-find_scan_hint(PlannerInfo *root, RelOptInfo *rel)
+find_scan_hint(PlannerInfo *root, Index relid, RelOptInfo *rel)
{
RangeTblEntry *rte;
int i;
* - not a base relation
* - not an ordinary relation (such as join and subquery)
*/
- if (rel->reloptkind != RELOPT_BASEREL || rel->rtekind != RTE_RELATION)
+ if (rel && (rel->reloptkind != RELOPT_BASEREL || rel->rtekind != RTE_RELATION))
return NULL;
- rte = root->simple_rte_array[rel->relid];
+ rte = root->simple_rte_array[relid];
/* We can't force scan method of foreign tables */
if (rte->relkind == RELKIND_FOREIGN_TABLE)
pg_hint_plan_get_relation_info(PlannerInfo *root, Oid relationObjectId,
bool inhparent, RelOptInfo *rel)
{
- ScanMethodHint *hint;
+ ScanMethodHint *hint = NULL;
if (prev_get_relation_info)
(*prev_get_relation_info) (root, relationObjectId, inhparent, rel);
{
/* store does relids of parent table. */
current_hint->parent_relid = rel->relid;
- current_hint->parent_rel_oid = relationObjectId;
+
+ }
+ else
+ {
+ /*
+ * Inheritance planner doesn't request information for the parent
+ * relation so we should check if this relation has a parent. We can
+ * ignore nested inheritace case because inheritance planner doesn't
+ * meet it.
+ */
+ ListCell *l;
+ foreach (l, root->append_rel_list)
+ {
+ AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(l);
+
+ if (appinfo->child_relid == rel->relid)
+ {
+ if (current_hint->parent_relid != appinfo->parent_relid)
+ {
+ inhparent = true;
+ current_hint->parent_relid = appinfo->parent_relid;
+ }
+ break;
+ }
+ }
+
+ }
+
+ if (inhparent)
+ {
+ Relation parent_rel;
+ List *indexoidlist;
+ ListCell *l;
+ Oid parentrel_oid;
+
+ /*
+ * Get and apply the hint for theparent_rel if the new parent has been
+ * found. This relation should be an ordinary relation so calling
+ * find_scan_hint with rel == NULL is safe.
+ */
+ if ((hint = find_scan_hint(root, current_hint->parent_relid,
+ NULL)) == NULL)
+ {
+ set_scan_config_options(current_hint->init_scan_mask,
+ current_hint->context);
+ }
+ else
+ {
+ set_scan_config_options(hint->enforce_mask, current_hint->context);
+ hint->base.state = HINT_STATE_USED;
+ }
+
+ current_hint->parent_hint = hint;
+
+ /* Resolve index name mask (if any) using this parent. */
+ if (hint && hint->indexnames)
+ {
+ parentrel_oid =
+ root->simple_rte_array[current_hint->parent_relid]->relid;
+ parent_rel = heap_open(parentrel_oid, NoLock);
+
+ /*
+ * Search for indexes match the hint for this parent
+ */
+ indexoidlist = RelationGetIndexList(parent_rel);
+
+ foreach(l, indexoidlist)
+ {
+ Oid indexoid = lfirst_oid(l);
+ char *indexname = get_rel_name(indexoid);
+ bool use_index = false;
+ ListCell *lc;
+ ParentIndexInfo *parent_index_info;
+
+ foreach(lc, hint->indexnames)
+ {
+ if (RelnameCmp(&indexname, &lfirst(lc)) == 0)
+ {
+ use_index = true;
+ break;
+ }
+ }
+ if (!use_index)
+ continue;
+
+ parent_index_info = get_parent_index_info(indexoid,
+ parentrel_oid);
+ current_hint->parent_index_infos =
+ lappend(current_hint->parent_index_infos, parent_index_info);
+ }
+ heap_close(parent_rel, NoLock);
+ }
+
+ if (current_hint->parent_relid == rel->relid)
+ {
+ /* This rel is a inheritance parent, which won't be scanned. */
+ return;
+ }
}
- else if (current_hint->parent_relid != 0)
+
+ if (current_hint->parent_hint != 0)
{
/*
- * We use the same GUC parameter if this table is the child table of a
- * table called pg_hint_plan_get_relation_info just before that.
+ * If inheritance parent is registered, check if it is really my
+ * parent.
*/
ListCell *l;
- /* append_rel_list contains all append rels; ignore others */
foreach(l, root->append_rel_list)
{
AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(l);
delete_indexes(current_hint->parent_hint, rel,
relationObjectId);
+ /* Scan fixation status is the same to the parent. */
return;
}
}
- /* This rel is not inherit table. */
+ /* This rel is not a child of the current parent. */
current_hint->parent_relid = 0;
current_hint->parent_rel_oid = InvalidOid;
current_hint->parent_hint = NULL;
}
- /*
- * If scan method hint was given, reset GUC parameters which control
- * planner behavior about choosing scan methods.
- */
- if ((hint = find_scan_hint(root, rel)) == NULL)
+ /* This table doesn't have a parent. Apply its own hints */
+ if ((hint = find_scan_hint(root, rel->relid, rel)) == NULL)
{
set_scan_config_options(current_hint->init_scan_mask,
current_hint->context);
set_scan_config_options(hint->enforce_mask, current_hint->context);
hint->base.state = HINT_STATE_USED;
- if (inhparent)
- {
- Relation relation;
- List *indexoidlist;
- ListCell *l;
-
- current_hint->parent_hint = hint;
-
- relation = heap_open(relationObjectId, NoLock);
- indexoidlist = RelationGetIndexList(relation);
-
- foreach(l, indexoidlist)
- {
- Oid indexoid = lfirst_oid(l);
- char *indexname = get_rel_name(indexoid);
- bool use_index = false;
- ListCell *lc;
- ParentIndexInfo *parent_index_info;
-
- foreach(lc, hint->indexnames)
- {
- if (RelnameCmp(&indexname, &lfirst(lc)) == 0)
- {
- use_index = true;
- break;
- }
- }
- if (!use_index)
- continue;
-
- parent_index_info = get_parent_index_info(indexoid,
- relationObjectId);
- current_hint->parent_index_infos =
- lappend(current_hint->parent_index_infos, parent_index_info);
- }
- heap_close(relation, NoLock);
- }
- else
- delete_indexes(hint, rel, InvalidOid);
+ delete_indexes(hint, rel, InvalidOid);
}
/*
* planner if scan method hint is not specified, otherwise use
* specified hints and mark the hint as used.
*/
- if ((hint = find_scan_hint(root, rel)) == NULL)
+ if ((hint = find_scan_hint(root, rel->relid, rel)) == NULL)
set_scan_config_options(hstate->init_scan_mask,
hstate->context);
else
JoinMethodHint *join_hint;
int save_nestlevel;
- if ((scan_hint = find_scan_hint(root, innerrel)) != NULL)
+ if ((scan_hint = find_scan_hint(root, innerrel->relid, innerrel)) != NULL)
{
set_scan_config_options(scan_hint->enforce_mask, current_hint->context);
scan_hint->base.state = HINT_STATE_USED;
OSDN Git Service
