(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)
(5 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
+ 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
+ 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
+ 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;
+ ListCell *l;
+ Index new_parent_relid = 0;
if (prev_get_relation_info)
(*prev_get_relation_info) (root, relationObjectId, inhparent, rel);
/*
- * Do nothing if we don't have valid hint in this context or current
- * nesting depth is nesting depth of SPI calls.
+ * Do nothing if we don't have a valid hint in this context or current
+ * nesting depth is at SPI calls.
*/
if (!current_hint || nested_level > 0)
return;
+ /*
+ * We could register the parent relation of the following children here
+ * when inhparent == true but inheritnce planner doesn't request
+ * information for inheritance parents. We also cannot distinguish the
+ * caller so we should always find the parents without this function being
+ * called for them.
+ */
if (inhparent)
+ return;
+
+ /* Find the parent for this relation */
+ 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)
+ new_parent_relid = appinfo->parent_relid;
+ break;
+ }
+ }
+
+ if (!l)
{
- /* store relid of the parent table. */
- current_hint->parent_relid = rel->relid;
+ /* This relation doesn't have a parent. Cancel current_hint. */
+ current_hint->parent_relid = 0;
+ current_hint->parent_hint = NULL;
}
- else if (current_hint->parent_relid != 0)
+
+ if (new_parent_relid > 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.
+ * Here we found a parent relation different from the remembered one.
+ * Remember it, apply the scan mask of it and then resolve the index
+ * restriction in order to be used by its children.
*/
- ListCell *l;
+ int scanmask = current_hint->init_scan_mask;
+ ScanMethodHint *parent_hint;
- /* append_rel_list contains all append rels; ignore others */
- foreach(l, root->append_rel_list)
+ current_hint->parent_relid = new_parent_relid;
+
+ /*
+ * Get and apply the hint for the new parent relation. It should be an
+ * ordinary relation so calling find_scan_hint with rel == NULL is
+ * safe.
+ */
+ current_hint->parent_hint = parent_hint =
+ find_scan_hint(root, current_hint->parent_relid, NULL);
+
+ if (parent_hint)
{
- AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(l);
+ scanmask = current_hint->parent_hint->enforce_mask;
+ parent_hint->base.state = HINT_STATE_USED;
- /* This rel is child table. */
- if (appinfo->parent_relid == current_hint->parent_relid &&
- appinfo->child_relid == rel->relid)
+ /* Resolve index name mask (if any) using the parent. */
+ if (parent_hint->indexnames)
{
- if (current_hint->parent_hint)
- delete_indexes(current_hint->parent_hint, rel,
- relationObjectId);
+ Oid parentrel_oid;
+ Relation parent_rel;
- return;
+ parentrel_oid =
+ root->simple_rte_array[current_hint->parent_relid]->relid;
+ parent_rel = heap_open(parentrel_oid, NoLock);
+
+ /* Search the parent relation for indexes match the hint spec */
+ foreach(l, RelationGetIndexList(parent_rel))
+ {
+ Oid indexoid = lfirst_oid(l);
+ char *indexname = get_rel_name(indexoid);
+ ListCell *lc;
+ ParentIndexInfo *parent_index_info;
+
+ foreach(lc, parent_hint->indexnames)
+ {
+ if (RelnameCmp(&indexname, &lfirst(lc)) == 0)
+ break;
+ }
+ if (!lc)
+ 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);
}
}
-
- /* This rel is not inherit table. */
- current_hint->parent_relid = 0;
- current_hint->parent_hint = NULL;
+
+ set_scan_config_options(scanmask, current_hint->context);
}
- /*
- * 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)
+ if (current_hint->parent_hint != 0)
{
- set_scan_config_options(current_hint->init_scan_mask,
- current_hint->context);
+ delete_indexes(current_hint->parent_hint, rel,
+ relationObjectId);
+
+ /* Scan fixation status is the same to the parent. */
return;
}
- set_scan_config_options(hint->enforce_mask, current_hint->context);
- hint->base.state = HINT_STATE_USED;
- if (inhparent)
+ /* This table doesn't have a parent hint. Apply its own hint if any. */
+ if ((hint = find_scan_hint(root, rel->relid, rel)) != NULL)
{
- 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;
+ set_scan_config_options(hint->enforce_mask, current_hint->context);
+ hint->base.state = HINT_STATE_USED;
- 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);
+ delete_indexes(hint, rel, InvalidOid);
}
else
- delete_indexes(hint, rel, InvalidOid);
+ set_scan_config_options(current_hint->init_scan_mask,
+ current_hint->context);
+ return;
}
/*
* 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;
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