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aqo_pg13.patch
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aqo_pg13.patch
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diff --git a/contrib/Makefile b/contrib/Makefile
index 7a4866e338..47a18b9698 100644
--- a/contrib/Makefile
+++ b/contrib/Makefile
@@ -7,6 +7,7 @@ include $(top_builddir)/src/Makefile.global
SUBDIRS = \
adminpack \
amcheck \
+ aqo \
auth_delay \
auto_explain \
bloom \
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c
index 43f9b01e83..707211308c 100644
--- a/src/backend/commands/explain.c
+++ b/src/backend/commands/explain.c
@@ -24,6 +24,7 @@
#include "nodes/extensible.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
+#include "optimizer/cost.h"
#include "parser/parsetree.h"
#include "rewrite/rewriteHandler.h"
#include "storage/bufmgr.h"
@@ -46,6 +47,9 @@ ExplainOneQuery_hook_type ExplainOneQuery_hook = NULL;
/* Hook for plugins to get control in explain_get_index_name() */
explain_get_index_name_hook_type explain_get_index_name_hook = NULL;
+/* Hook for plugins to get control in ExplainOnePlan() */
+ExplainOnePlan_hook_type ExplainOnePlan_hook = NULL;
+
/* OR-able flags for ExplainXMLTag() */
#define X_OPENING 0
@@ -638,6 +642,10 @@ ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into, ExplainState *es,
ExplainPropertyFloat("Execution Time", "ms", 1000.0 * totaltime, 3,
es);
+ if (ExplainOnePlan_hook)
+ ExplainOnePlan_hook(plannedstmt, into, es,
+ queryString, params, planduration, queryEnv);
+
ExplainCloseGroup("Query", NULL, true, es);
}
@@ -1579,6 +1587,38 @@ ExplainNode(PlanState *planstate, List *ancestors,
appendStringInfo(es->str,
" (actual rows=%.0f loops=%.0f)",
rows, nloops);
+
+#ifdef AQO_EXPLAIN
+ if (es->verbose && plan && planstate->instrument)
+ {
+ int wrkrs = 1;
+ double error = -1.;
+
+ if (planstate->worker_instrument && IsParallelTuplesProcessing(plan))
+ {
+ int i;
+ for (i = 0; i < planstate->worker_instrument->num_workers; i++)
+ {
+ Instrumentation *instrument = &planstate->worker_instrument->instrument[i];
+ if (instrument->nloops <= 0)
+ continue;
+ wrkrs++;
+ }
+ }
+
+ if (plan->predicted_cardinality > 0.)
+ {
+ error = 100. * (plan->predicted_cardinality - (rows*wrkrs))
+ / plan->predicted_cardinality;
+ appendStringInfo(es->str,
+ " (AQO: cardinality=%.0lf, error=%.0lf%%, fsspace_hash=%d)",
+ plan->predicted_cardinality, error, plan->fss_hash);
+ }
+ else
+ appendStringInfo(es->str, " (AQO not used, fsspace_hash=%d)",
+ plan->fss_hash);
+ }
+#endif
}
else
{
diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index 530aac68a7..1d94feadb9 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -126,6 +126,12 @@ CopyPlanFields(const Plan *from, Plan *newnode)
COPY_NODE_FIELD(lefttree);
COPY_NODE_FIELD(righttree);
COPY_NODE_FIELD(initPlan);
+ COPY_SCALAR_FIELD(had_path);
+ COPY_NODE_FIELD(path_clauses);
+ COPY_NODE_FIELD(path_relids);
+ COPY_SCALAR_FIELD(path_jointype);
+ COPY_SCALAR_FIELD(path_parallel_workers);
+ COPY_SCALAR_FIELD(was_parametrized);
COPY_BITMAPSET_FIELD(extParam);
COPY_BITMAPSET_FIELD(allParam);
}
diff --git a/src/backend/optimizer/path/costsize.c b/src/backend/optimizer/path/costsize.c
index f1dfdc1a4a..359cafa531 100644
--- a/src/backend/optimizer/path/costsize.c
+++ b/src/backend/optimizer/path/costsize.c
@@ -97,6 +97,10 @@
#include "utils/spccache.h"
#include "utils/tuplesort.h"
+set_baserel_rows_estimate_hook_type set_baserel_rows_estimate_hook = NULL;
+get_parameterized_baserel_size_hook_type get_parameterized_baserel_size_hook = NULL;
+get_parameterized_joinrel_size_hook_type get_parameterized_joinrel_size_hook = NULL;
+set_joinrel_size_estimates_hook_type set_joinrel_size_estimates_hook = NULL;
#define LOG2(x) (log(x) / 0.693147180559945)
@@ -185,7 +189,6 @@ static Cost append_nonpartial_cost(List *subpaths, int numpaths,
static void set_rel_width(PlannerInfo *root, RelOptInfo *rel);
static double relation_byte_size(double tuples, int width);
static double page_size(double tuples, int width);
-static double get_parallel_divisor(Path *path);
/*
@@ -266,7 +269,7 @@ cost_seqscan(Path *path, PlannerInfo *root,
/* Adjust costing for parallelism, if used. */
if (path->parallel_workers > 0)
{
- double parallel_divisor = get_parallel_divisor(path);
+ double parallel_divisor = get_parallel_divisor(path->parallel_workers);
/* The CPU cost is divided among all the workers. */
cpu_run_cost /= parallel_divisor;
@@ -745,7 +748,7 @@ cost_index(IndexPath *path, PlannerInfo *root, double loop_count,
/* Adjust costing for parallelism, if used. */
if (path->path.parallel_workers > 0)
{
- double parallel_divisor = get_parallel_divisor(&path->path);
+ double parallel_divisor = get_parallel_divisor(path->path.parallel_workers);
path->path.rows = clamp_row_est(path->path.rows / parallel_divisor);
@@ -1026,7 +1029,7 @@ cost_bitmap_heap_scan(Path *path, PlannerInfo *root, RelOptInfo *baserel,
/* Adjust costing for parallelism, if used. */
if (path->parallel_workers > 0)
{
- double parallel_divisor = get_parallel_divisor(path);
+ double parallel_divisor = get_parallel_divisor(path->parallel_workers);
/* The CPU cost is divided among all the workers. */
cpu_run_cost /= parallel_divisor;
@@ -2129,7 +2132,7 @@ cost_append(AppendPath *apath)
else /* parallel-aware */
{
int i = 0;
- double parallel_divisor = get_parallel_divisor(&apath->path);
+ double parallel_divisor = get_parallel_divisor(apath->path.parallel_workers);
/* Parallel-aware Append never produces ordered output. */
Assert(apath->path.pathkeys == NIL);
@@ -2163,7 +2166,7 @@ cost_append(AppendPath *apath)
{
double subpath_parallel_divisor;
- subpath_parallel_divisor = get_parallel_divisor(subpath);
+ subpath_parallel_divisor = get_parallel_divisor(subpath->parallel_workers);
apath->path.rows += subpath->rows * (subpath_parallel_divisor /
parallel_divisor);
apath->path.total_cost += subpath->total_cost;
@@ -2761,7 +2764,7 @@ final_cost_nestloop(PlannerInfo *root, NestPath *path,
/* For partial paths, scale row estimate. */
if (path->path.parallel_workers > 0)
{
- double parallel_divisor = get_parallel_divisor(&path->path);
+ double parallel_divisor = get_parallel_divisor(path->path.parallel_workers);
path->path.rows =
clamp_row_est(path->path.rows / parallel_divisor);
@@ -3207,7 +3210,7 @@ final_cost_mergejoin(PlannerInfo *root, MergePath *path,
/* For partial paths, scale row estimate. */
if (path->jpath.path.parallel_workers > 0)
{
- double parallel_divisor = get_parallel_divisor(&path->jpath.path);
+ double parallel_divisor = get_parallel_divisor(path->jpath.path.parallel_workers);
path->jpath.path.rows =
clamp_row_est(path->jpath.path.rows / parallel_divisor);
@@ -3541,7 +3544,7 @@ initial_cost_hashjoin(PlannerInfo *root, JoinCostWorkspace *workspace,
* number, so we need to undo the division.
*/
if (parallel_hash)
- inner_path_rows_total *= get_parallel_divisor(inner_path);
+ inner_path_rows_total *= get_parallel_divisor(inner_path->parallel_workers);
/*
* Get hash table size that executor would use for inner relation.
@@ -3638,7 +3641,7 @@ final_cost_hashjoin(PlannerInfo *root, HashPath *path,
/* For partial paths, scale row estimate. */
if (path->jpath.path.parallel_workers > 0)
{
- double parallel_divisor = get_parallel_divisor(&path->jpath.path);
+ double parallel_divisor = get_parallel_divisor(path->jpath.path.parallel_workers);
path->jpath.path.rows =
clamp_row_est(path->jpath.path.rows / parallel_divisor);
@@ -4633,6 +4636,49 @@ approx_tuple_count(PlannerInfo *root, JoinPath *path, List *quals)
}
+/*
+ * set_baserel_rows_estimate
+ * Set the rows estimate for the given base relation.
+ *
+ * Rows is the estimated number of output tuples after applying
+ * restriction clauses.
+ *
+ * To support loadable plugins that monitor or modify cardinality estimation,
+ * we provide a hook variable that lets a plugin get control before and
+ * after the cardinality estimation.
+ * The hook must set rel->rows.
+ */
+void
+set_baserel_rows_estimate(PlannerInfo *root, RelOptInfo *rel)
+{
+ if (set_baserel_rows_estimate_hook)
+ (*set_baserel_rows_estimate_hook) (root, rel);
+ else
+ set_baserel_rows_estimate_standard(root, rel);
+}
+
+/*
+ * set_baserel_rows_estimate
+ * Set the rows estimate for the given base relation.
+ *
+ * Rows is the estimated number of output tuples after applying
+ * restriction clauses.
+ */
+void
+set_baserel_rows_estimate_standard(PlannerInfo *root, RelOptInfo *rel)
+{
+ double nrows;
+
+ nrows = rel->tuples *
+ clauselist_selectivity(root,
+ rel->baserestrictinfo,
+ 0,
+ JOIN_INNER,
+ NULL);
+
+ rel->rows = clamp_row_est(nrows);
+}
+
/*
* set_baserel_size_estimates
* Set the size estimates for the given base relation.
@@ -4649,19 +4695,10 @@ approx_tuple_count(PlannerInfo *root, JoinPath *path, List *quals)
void
set_baserel_size_estimates(PlannerInfo *root, RelOptInfo *rel)
{
- double nrows;
-
/* Should only be applied to base relations */
Assert(rel->relid > 0);
- nrows = rel->tuples *
- clauselist_selectivity(root,
- rel->baserestrictinfo,
- 0,
- JOIN_INNER,
- NULL);
-
- rel->rows = clamp_row_est(nrows);
+ set_baserel_rows_estimate(root, rel);
cost_qual_eval(&rel->baserestrictcost, rel->baserestrictinfo, root);
@@ -4672,13 +4709,33 @@ set_baserel_size_estimates(PlannerInfo *root, RelOptInfo *rel)
* get_parameterized_baserel_size
* Make a size estimate for a parameterized scan of a base relation.
*
+ * To support loadable plugins that monitor or modify cardinality estimation,
+ * we provide a hook variable that lets a plugin get control before and
+ * after the cardinality estimation.
+ */
+double
+get_parameterized_baserel_size(PlannerInfo *root, RelOptInfo *rel,
+ List *param_clauses)
+{
+ if (get_parameterized_baserel_size_hook)
+ return (*get_parameterized_baserel_size_hook) (root, rel,
+ param_clauses);
+ else
+ return get_parameterized_baserel_size_standard(root, rel,
+ param_clauses);
+}
+
+/*
+ * get_parameterized_baserel_size_standard
+ * Make a size estimate for a parameterized scan of a base relation.
+ *
* 'param_clauses' lists the additional join clauses to be used.
*
* set_baserel_size_estimates must have been applied already.
*/
double
-get_parameterized_baserel_size(PlannerInfo *root, RelOptInfo *rel,
- List *param_clauses)
+get_parameterized_baserel_size_standard(PlannerInfo *root, RelOptInfo *rel,
+ List *param_clauses)
{
List *allclauses;
double nrows;
@@ -4707,6 +4764,36 @@ get_parameterized_baserel_size(PlannerInfo *root, RelOptInfo *rel,
* set_joinrel_size_estimates
* Set the size estimates for the given join relation.
*
+ * To support loadable plugins that monitor or modify cardinality estimation,
+ * we provide a hook variable that lets a plugin get control before and
+ * after the cardinality estimation.
+ * The hook must set rel->rows value.
+ */
+void
+set_joinrel_size_estimates(PlannerInfo *root, RelOptInfo *rel,
+ RelOptInfo *outer_rel,
+ RelOptInfo *inner_rel,
+ SpecialJoinInfo *sjinfo,
+ List *restrictlist)
+{
+ if (set_joinrel_size_estimates_hook)
+ (*set_joinrel_size_estimates_hook) (root, rel,
+ outer_rel,
+ inner_rel,
+ sjinfo,
+ restrictlist);
+ else
+ set_joinrel_size_estimates_standard(root, rel,
+ outer_rel,
+ inner_rel,
+ sjinfo,
+ restrictlist);
+}
+
+/*
+ * set_joinrel_size_estimates_standard
+ * Set the size estimates for the given join relation.
+ *
* The rel's targetlist must have been constructed already, and a
* restriction clause list that matches the given component rels must
* be provided.
@@ -4726,11 +4813,11 @@ get_parameterized_baserel_size(PlannerInfo *root, RelOptInfo *rel,
* build_joinrel_tlist, and baserestrictcost is not used for join rels.
*/
void
-set_joinrel_size_estimates(PlannerInfo *root, RelOptInfo *rel,
- RelOptInfo *outer_rel,
- RelOptInfo *inner_rel,
- SpecialJoinInfo *sjinfo,
- List *restrictlist)
+set_joinrel_size_estimates_standard(PlannerInfo *root, RelOptInfo *rel,
+ RelOptInfo *outer_rel,
+ RelOptInfo *inner_rel,
+ SpecialJoinInfo *sjinfo,
+ List *restrictlist)
{
rel->rows = calc_joinrel_size_estimate(root,
rel,
@@ -4746,6 +4833,35 @@ set_joinrel_size_estimates(PlannerInfo *root, RelOptInfo *rel,
* get_parameterized_joinrel_size
* Make a size estimate for a parameterized scan of a join relation.
*
+ * To support loadable plugins that monitor or modify cardinality estimation,
+ * we provide a hook variable that lets a plugin get control before and
+ * after the cardinality estimation.
+ */
+double
+get_parameterized_joinrel_size(PlannerInfo *root, RelOptInfo *rel,
+ Path *outer_path,
+ Path *inner_path,
+ SpecialJoinInfo *sjinfo,
+ List *restrict_clauses)
+{
+ if (get_parameterized_joinrel_size_hook)
+ return (*get_parameterized_joinrel_size_hook) (root, rel,
+ outer_path,
+ inner_path,
+ sjinfo,
+ restrict_clauses);
+ else
+ return get_parameterized_joinrel_size_standard(root, rel,
+ outer_path,
+ inner_path,
+ sjinfo,
+ restrict_clauses);
+}
+
+/*
+ * get_parameterized_joinrel_size_standard
+ * Make a size estimate for a parameterized scan of a join relation.
+ *
* 'rel' is the joinrel under consideration.
* 'outer_path', 'inner_path' are (probably also parameterized) Paths that
* produce the relations being joined.
@@ -4758,11 +4874,11 @@ set_joinrel_size_estimates(PlannerInfo *root, RelOptInfo *rel,
* set_joinrel_size_estimates must have been applied already.
*/
double
-get_parameterized_joinrel_size(PlannerInfo *root, RelOptInfo *rel,
- Path *outer_path,
- Path *inner_path,
- SpecialJoinInfo *sjinfo,
- List *restrict_clauses)
+get_parameterized_joinrel_size_standard(PlannerInfo *root, RelOptInfo *rel,
+ Path *outer_path,
+ Path *inner_path,
+ SpecialJoinInfo *sjinfo,
+ List *restrict_clauses)
{
double nrows;
@@ -5760,14 +5876,25 @@ page_size(double tuples, int width)
return ceil(relation_byte_size(tuples, width) / BLCKSZ);
}
+bool
+IsParallelTuplesProcessing(const Plan *plan)
+{
+ if (plan->path_parallel_workers > 0 && (
+ plan->parallel_aware || nodeTag(plan) == T_HashJoin ||
+ nodeTag(plan) == T_MergeJoin ||
+ nodeTag(plan) == T_NestLoop))
+ return true;
+ return false;
+}
+
/*
* Estimate the fraction of the work that each worker will do given the
* number of workers budgeted for the path.
*/
-static double
-get_parallel_divisor(Path *path)
+double
+get_parallel_divisor(int parallel_workers)
{
- double parallel_divisor = path->parallel_workers;
+ double parallel_divisor = parallel_workers;
/*
* Early experience with parallel query suggests that when there is only
@@ -5784,7 +5911,7 @@ get_parallel_divisor(Path *path)
{
double leader_contribution;
- leader_contribution = 1.0 - (0.3 * path->parallel_workers);
+ leader_contribution = 1.0 - (0.3 * parallel_workers);
if (leader_contribution > 0)
parallel_divisor += leader_contribution;
}
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c
index 40abe6f9f6..9edd6daeff 100644
--- a/src/backend/optimizer/plan/createplan.c
+++ b/src/backend/optimizer/plan/createplan.c
@@ -70,6 +70,8 @@
#define CP_LABEL_TLIST 0x0004 /* tlist must contain sortgrouprefs */
#define CP_IGNORE_TLIST 0x0008 /* caller will replace tlist */
+/* Hook for plugins to get control in creating plan from path */
+copy_generic_path_info_hook_type copy_generic_path_info_hook = NULL;
static Plan *create_plan_recurse(PlannerInfo *root, Path *best_path,
int flags);
@@ -166,7 +168,7 @@ static Node *fix_indexqual_clause(PlannerInfo *root,
static Node *fix_indexqual_operand(Node *node, IndexOptInfo *index, int indexcol);
static List *get_switched_clauses(List *clauses, Relids outerrelids);
static List *order_qual_clauses(PlannerInfo *root, List *clauses);
-static void copy_generic_path_info(Plan *dest, Path *src);
+static void copy_generic_path_info(PlannerInfo *root, Plan *dest, Path *src);
static void copy_plan_costsize(Plan *dest, Plan *src);
static void label_sort_with_costsize(PlannerInfo *root, Sort *plan,
double limit_tuples);
@@ -1110,7 +1112,7 @@ create_append_plan(PlannerInfo *root, AppendPath *best_path, int flags)
false)),
NULL);
- copy_generic_path_info(plan, (Path *) best_path);
+ copy_generic_path_info(root, plan, (Path *) best_path);
return plan;
}
@@ -1257,7 +1259,7 @@ create_append_plan(PlannerInfo *root, AppendPath *best_path, int flags)
plan->first_partial_plan = best_path->first_partial_path;
plan->part_prune_info = partpruneinfo;
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, &best_path->path);
/*
* If prepare_sort_from_pathkeys added sort columns, but we were told to
@@ -1303,7 +1305,7 @@ create_merge_append_plan(PlannerInfo *root, MergeAppendPath *best_path,
* prepare_sort_from_pathkeys on it before we do so on the individual
* child plans, to make cross-checking the sort info easier.
*/
- copy_generic_path_info(plan, (Path *) best_path);
+ copy_generic_path_info(root, plan, &best_path->path);
plan->targetlist = tlist;
plan->qual = NIL;
plan->lefttree = NULL;
@@ -1456,7 +1458,7 @@ create_group_result_plan(PlannerInfo *root, GroupResultPath *best_path)
plan = make_result(tlist, (Node *) quals, NULL);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, &best_path->path);
return plan;
}
@@ -1481,7 +1483,7 @@ create_project_set_plan(PlannerInfo *root, ProjectSetPath *best_path)
plan = make_project_set(tlist, subplan);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, &best_path->path);
return plan;
}
@@ -1509,7 +1511,7 @@ create_material_plan(PlannerInfo *root, MaterialPath *best_path, int flags)
plan = make_material(subplan);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, &best_path->path);
return plan;
}
@@ -1709,7 +1711,7 @@ create_unique_plan(PlannerInfo *root, UniquePath *best_path, int flags)
}
/* Copy cost data from Path to Plan */
- copy_generic_path_info(plan, &best_path->path);
+ copy_generic_path_info(root, plan, &best_path->path);
return plan;
}
@@ -1744,7 +1746,7 @@ create_gather_plan(PlannerInfo *root, GatherPath *best_path)
best_path->single_copy,
subplan);
- copy_generic_path_info(&gather_plan->plan, &best_path->path);
+ copy_generic_path_info(root, &gather_plan->plan, &best_path->path);
/* use parallel mode for parallel plans. */
root->glob->parallelModeNeeded = true;
@@ -1773,7 +1775,7 @@ create_gather_merge_plan(PlannerInfo *root, GatherMergePath *best_path)
gm_plan = makeNode(GatherMerge);
gm_plan->plan.targetlist = tlist;
gm_plan->num_workers = best_path->num_workers;
- copy_generic_path_info(&gm_plan->plan, &best_path->path);
+ copy_generic_path_info(root, &gm_plan->plan, &best_path->path);
/* Assign the rescan Param. */
gm_plan->rescan_param = assign_special_exec_param(root);
@@ -1901,7 +1903,7 @@ create_projection_plan(PlannerInfo *root, ProjectionPath *best_path, int flags)
/* We need a Result node */
plan = (Plan *) make_result(tlist, NULL, subplan);
- copy_generic_path_info(plan, (Path *) best_path);
+ copy_generic_path_info(root, plan, (Path *) best_path);
}
return plan;
@@ -2002,7 +2004,7 @@ create_sort_plan(PlannerInfo *root, SortPath *best_path, int flags)
IS_OTHER_REL(best_path->subpath->parent) ?
best_path->path.parent->relids : NULL);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2028,7 +2030,7 @@ create_incrementalsort_plan(PlannerInfo *root, IncrementalSortPath *best_path,
best_path->spath.path.parent->relids : NULL,
best_path->nPresortedCols);
- copy_generic_path_info(&plan->sort.plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->sort.plan, (Path *) best_path);
return plan;
}
@@ -2067,7 +2069,7 @@ create_group_plan(PlannerInfo *root, GroupPath *best_path)
subplan->targetlist),
subplan);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2095,7 +2097,7 @@ create_upper_unique_plan(PlannerInfo *root, UpperUniquePath *best_path, int flag
best_path->path.pathkeys,
best_path->numkeys);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2139,7 +2141,7 @@ create_agg_plan(PlannerInfo *root, AggPath *best_path)
best_path->transitionSpace,
subplan);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2341,7 +2343,7 @@ create_groupingsets_plan(PlannerInfo *root, GroupingSetsPath *best_path)
subplan);
/* Copy cost data from Path to Plan */
- copy_generic_path_info(&plan->plan, &best_path->path);
+ copy_generic_path_info(root, &plan->plan, &best_path->path);
}
return (Plan *) plan;
@@ -2399,7 +2401,7 @@ create_minmaxagg_plan(PlannerInfo *root, MinMaxAggPath *best_path)
plan = make_result(tlist, (Node *) best_path->quals, NULL);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
/*
* During setrefs.c, we'll need to replace references to the Agg nodes
@@ -2518,7 +2520,7 @@ create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path)
wc->inRangeNullsFirst,
subplan);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2554,7 +2556,7 @@ create_setop_plan(PlannerInfo *root, SetOpPath *best_path, int flags)
best_path->firstFlag,
numGroups);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2590,7 +2592,7 @@ create_recursiveunion_plan(PlannerInfo *root, RecursiveUnionPath *best_path)
best_path->distinctList,
numGroups);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2613,7 +2615,7 @@ create_lockrows_plan(PlannerInfo *root, LockRowsPath *best_path,
plan = make_lockrows(subplan, best_path->rowMarks, best_path->epqParam);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2674,7 +2676,7 @@ create_modifytable_plan(PlannerInfo *root, ModifyTablePath *best_path)
best_path->onconflict,
best_path->epqParam);
- copy_generic_path_info(&plan->plan, &best_path->path);
+ copy_generic_path_info(root, &plan->plan, &best_path->path);
return plan;
}
@@ -2728,7 +2730,7 @@ create_limit_plan(PlannerInfo *root, LimitPath *best_path, int flags)
best_path->limitOption,
numUniqkeys, uniqColIdx, uniqOperators, uniqCollations);
- copy_generic_path_info(&plan->plan, (Path *) best_path);
+ copy_generic_path_info(root, &plan->plan, (Path *) best_path);
return plan;
}
@@ -2774,7 +2776,7 @@ create_seqscan_plan(PlannerInfo *root, Path *best_path,
scan_clauses,
scan_relid);
- copy_generic_path_info(&scan_plan->plan, best_path);
+ copy_generic_path_info(root, &scan_plan->plan, best_path);
return scan_plan;
}
@@ -2820,7 +2822,7 @@ create_samplescan_plan(PlannerInfo *root, Path *best_path,
scan_relid,
tsc);
- copy_generic_path_info(&scan_plan->scan.plan, best_path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, best_path);
return scan_plan;
}
@@ -2998,7 +3000,7 @@ create_indexscan_plan(PlannerInfo *root,
indexorderbyops,
best_path->indexscandir);
- copy_generic_path_info(&scan_plan->plan, &best_path->path);
+ copy_generic_path_info(root, &scan_plan->plan, &best_path->path);
return scan_plan;
}
@@ -3113,7 +3115,7 @@ create_bitmap_scan_plan(PlannerInfo *root,
bitmapqualorig,
baserelid);
- copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, &best_path->path);
return scan_plan;
}
@@ -3433,7 +3435,7 @@ create_tidscan_plan(PlannerInfo *root, TidPath *best_path,
scan_relid,
tidquals);
- copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, &best_path->path);
return scan_plan;
}
@@ -3483,7 +3485,7 @@ create_subqueryscan_plan(PlannerInfo *root, SubqueryScanPath *best_path,
scan_relid,
subplan);
- copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, &best_path->path);
return scan_plan;
}
@@ -3526,7 +3528,7 @@ create_functionscan_plan(PlannerInfo *root, Path *best_path,
scan_plan = make_functionscan(tlist, scan_clauses, scan_relid,
functions, rte->funcordinality);
- copy_generic_path_info(&scan_plan->scan.plan, best_path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, best_path);
return scan_plan;
}
@@ -3569,7 +3571,7 @@ create_tablefuncscan_plan(PlannerInfo *root, Path *best_path,
scan_plan = make_tablefuncscan(tlist, scan_clauses, scan_relid,
tablefunc);
- copy_generic_path_info(&scan_plan->scan.plan, best_path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, best_path);
return scan_plan;
}
@@ -3613,7 +3615,7 @@ create_valuesscan_plan(PlannerInfo *root, Path *best_path,
scan_plan = make_valuesscan(tlist, scan_clauses, scan_relid,
values_lists);
- copy_generic_path_info(&scan_plan->scan.plan, best_path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, best_path);
return scan_plan;
}
@@ -3706,7 +3708,7 @@ create_ctescan_plan(PlannerInfo *root, Path *best_path,
scan_plan = make_ctescan(tlist, scan_clauses, scan_relid,
plan_id, cte_param_id);
- copy_generic_path_info(&scan_plan->scan.plan, best_path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, best_path);
return scan_plan;
}
@@ -3745,7 +3747,7 @@ create_namedtuplestorescan_plan(PlannerInfo *root, Path *best_path,
scan_plan = make_namedtuplestorescan(tlist, scan_clauses, scan_relid,
rte->enrname);
- copy_generic_path_info(&scan_plan->scan.plan, best_path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, best_path);
return scan_plan;
}
@@ -3783,7 +3785,7 @@ create_resultscan_plan(PlannerInfo *root, Path *best_path,
scan_plan = make_result(tlist, (Node *) scan_clauses, NULL);
- copy_generic_path_info(&scan_plan->plan, best_path);
+ copy_generic_path_info(root, &scan_plan->plan, best_path);
return scan_plan;
}
@@ -3843,7 +3845,7 @@ create_worktablescan_plan(PlannerInfo *root, Path *best_path,
scan_plan = make_worktablescan(tlist, scan_clauses, scan_relid,
cteroot->wt_param_id);
- copy_generic_path_info(&scan_plan->scan.plan, best_path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, best_path);
return scan_plan;
}
@@ -3903,7 +3905,7 @@ create_foreignscan_plan(PlannerInfo *root, ForeignPath *best_path,
outer_plan);
/* Copy cost data from Path to Plan; no need to make FDW do this */
- copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
+ copy_generic_path_info(root, &scan_plan->scan.plan, &best_path->path);
/* Copy foreign server OID; likewise, no need to make FDW do this */
scan_plan->fs_server = rel->serverid;
@@ -4037,7 +4039,7 @@ create_customscan_plan(PlannerInfo *root, CustomPath *best_path,
* Copy cost data from Path to Plan; no need to make custom-plan providers
* do this
*/
- copy_generic_path_info(&cplan->scan.plan, &best_path->path);
+ copy_generic_path_info(root, &cplan->scan.plan, &best_path->path);
/* Likewise, copy the relids that are represented by this custom scan */
cplan->custom_relids = best_path->path.parent->relids;
@@ -4139,7 +4141,7 @@ create_nestloop_plan(PlannerInfo *root,
best_path->jointype,
best_path->inner_unique);
- copy_generic_path_info(&join_plan->join.plan, &best_path->path);
+ copy_generic_path_info(root, &join_plan->join.plan, &best_path->path);
return join_plan;
}
@@ -4446,7 +4448,7 @@ create_mergejoin_plan(PlannerInfo *root,
best_path->skip_mark_restore);
/* Costs of sort and material steps are included in path cost already */
- copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
+ copy_generic_path_info(root, &join_plan->join.plan, &best_path->jpath.path);
return join_plan;
}
@@ -4619,7 +4621,7 @@ create_hashjoin_plan(PlannerInfo *root,
best_path->jpath.jointype,
best_path->jpath.inner_unique);
- copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
+ copy_generic_path_info(root, &join_plan->join.plan, &best_path->jpath.path);
return join_plan;
}
@@ -5119,7 +5121,7 @@ order_qual_clauses(PlannerInfo *root, List *clauses)
* Also copy the parallel-related flags, which the executor *will* use.
*/
static void
-copy_generic_path_info(Plan *dest, Path *src)
+copy_generic_path_info(PlannerInfo *root, Plan *dest, Path *src)
{
dest->startup_cost = src->startup_cost;
dest->total_cost = src->total_cost;
@@ -5127,6 +5129,9 @@ copy_generic_path_info(Plan *dest, Path *src)
dest->plan_width = src->pathtarget->width;
dest->parallel_aware = src->parallel_aware;
dest->parallel_safe = src->parallel_safe;
+
+ if (copy_generic_path_info_hook)
+ (*copy_generic_path_info_hook) (root, dest, src);
}
/*
diff --git a/src/backend/optimizer/util/relnode.c b/src/backend/optimizer/util/relnode.c
index 76245c1ff3..cac6adf35e 100644
--- a/src/backend/optimizer/util/relnode.c
+++ b/src/backend/optimizer/util/relnode.c
@@ -1261,6 +1261,7 @@ find_childrel_parents(PlannerInfo *root, RelOptInfo *rel)
}
+set_parampathinfo_postinit_hook_type parampathinfo_postinit_hook = NULL;
/*
* get_baserel_parampathinfo
* Get the ParamPathInfo for a parameterized path for a base relation,
@@ -1329,6 +1330,10 @@ get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel,
ppi->ppi_req_outer = required_outer;
ppi->ppi_rows = rows;
ppi->ppi_clauses = pclauses;
+
+ if (parampathinfo_postinit_hook)
+ (*parampathinfo_postinit_hook)(ppi);
+
baserel->ppilist = lappend(baserel->ppilist, ppi);
return ppi;
@@ -1554,6 +1559,10 @@ get_joinrel_parampathinfo(PlannerInfo *root, RelOptInfo *joinrel,
ppi->ppi_req_outer = required_outer;
ppi->ppi_rows = rows;
ppi->ppi_clauses = NIL;
+
+ if (parampathinfo_postinit_hook)
+ (*parampathinfo_postinit_hook)(ppi);
+
joinrel->ppilist = lappend(joinrel->ppilist, ppi);
return ppi;
diff --git a/src/include/commands/explain.h b/src/include/commands/explain.h
index ba661d32a6..3c2595d639 100644
--- a/src/include/commands/explain.h
+++ b/src/include/commands/explain.h
@@ -75,6 +75,12 @@ extern PGDLLIMPORT ExplainOneQuery_hook_type ExplainOneQuery_hook;
typedef const char *(*explain_get_index_name_hook_type) (Oid indexId);
extern PGDLLIMPORT explain_get_index_name_hook_type explain_get_index_name_hook;
+/* Hook for plugins to get control in ExplainOnePlan() */
+typedef void (*ExplainOnePlan_hook_type) (PlannedStmt *plannedstmt, IntoClause *into,
+ ExplainState *es, const char *queryString,
+ ParamListInfo params, const instr_time *planduration,
+ QueryEnvironment *queryEnv);
+extern PGDLLIMPORT ExplainOnePlan_hook_type ExplainOnePlan_hook;
extern void ExplainQuery(ParseState *pstate, ExplainStmt *stmt,
ParamListInfo params, DestReceiver *dest);
diff --git a/src/include/nodes/pathnodes.h b/src/include/nodes/pathnodes.h
index 8f62d61702..cfcd2c249d 100644
--- a/src/include/nodes/pathnodes.h
+++ b/src/include/nodes/pathnodes.h
@@ -734,6 +734,10 @@ typedef struct RelOptInfo
Relids top_parent_relids; /* Relids of topmost parents (if "other"
* rel) */
+ /* For Adaptive optimization DEBUG purposes */
+ double predicted_cardinality;
+ int fss_hash;
+
/* used for partitioned relations: */
PartitionScheme part_scheme; /* Partitioning scheme */
int nparts; /* Number of partitions; -1 if not yet set; in
@@ -1101,6 +1105,10 @@ typedef struct ParamPathInfo
Relids ppi_req_outer; /* rels supplying parameters used by path */
double ppi_rows; /* estimated number of result tuples */
List *ppi_clauses; /* join clauses available from outer rels */
+
+ /* AQO DEBUG purposes */
+ double predicted_ppi_rows;
+ double fss_ppi_hash;
} ParamPathInfo;
diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h
index 7e6b10f86b..148720a566 100644
--- a/src/include/nodes/plannodes.h
+++ b/src/include/nodes/plannodes.h
@@ -140,6 +140,19 @@ typedef struct Plan
List *initPlan; /* Init Plan nodes (un-correlated expr
* subselects) */
+ /*
+ * information for adaptive query optimization
+ */
+ bool had_path;
+ List *path_clauses;
+ List *path_relids;
+ JoinType path_jointype;
+ int path_parallel_workers;
+ bool was_parametrized;
+ /* For Adaptive optimization DEBUG purposes */
+ double predicted_cardinality;
+ int fss_hash;
+
/*
* Information for management of parameter-change-driven rescanning
*
diff --git a/src/include/optimizer/cost.h b/src/include/optimizer/cost.h
index 6141654e47..0915da8618 100644
--- a/src/include/optimizer/cost.h
+++ b/src/include/optimizer/cost.h
@@ -39,6 +39,33 @@ typedef enum
} ConstraintExclusionType;
+/* Hook for plugins to get control of cardinality estimation */
+typedef void (*set_baserel_rows_estimate_hook_type) (PlannerInfo *root,
+ RelOptInfo *rel);
+extern PGDLLIMPORT set_baserel_rows_estimate_hook_type
+ set_baserel_rows_estimate_hook;
+typedef double (*get_parameterized_baserel_size_hook_type) (PlannerInfo *root,
+ RelOptInfo *rel,
+ List *param_clauses);
+extern PGDLLIMPORT get_parameterized_baserel_size_hook_type
+ get_parameterized_baserel_size_hook;
+typedef double (*get_parameterized_joinrel_size_hook_type) (PlannerInfo *root,
+ RelOptInfo *rel,
+ Path *outer_path,
+ Path *inner_path,
+ SpecialJoinInfo *sjinfo,
+ List *restrict_clauses);
+extern PGDLLIMPORT get_parameterized_joinrel_size_hook_type
+ get_parameterized_joinrel_size_hook;
+typedef void (*set_joinrel_size_estimates_hook_type) (PlannerInfo *root,
+ RelOptInfo *rel,
+ RelOptInfo *outer_rel,
+ RelOptInfo *inner_rel,
+ SpecialJoinInfo *sjinfo,
+ List *restrictlist);