PostgreSQL Source Code  git master
pathnode.c File Reference
#include "postgres.h"
#include <math.h>
#include "foreign/fdwapi.h"
#include "miscadmin.h"
#include "nodes/extensible.h"
#include "nodes/nodeFuncs.h"
#include "optimizer/appendinfo.h"
#include "optimizer/clauses.h"
#include "optimizer/cost.h"
#include "optimizer/optimizer.h"
#include "optimizer/pathnode.h"
#include "optimizer/paths.h"
#include "optimizer/planmain.h"
#include "optimizer/prep.h"
#include "optimizer/restrictinfo.h"
#include "optimizer/tlist.h"
#include "parser/parsetree.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/selfuncs.h"
Include dependency graph for pathnode.c:

Go to the source code of this file.

Macros

#define STD_FUZZ_FACTOR   1.01
 
#define CONSIDER_PATH_STARTUP_COST(p)   ((p)->param_info == NULL ? (p)->parent->consider_startup : (p)->parent->consider_param_startup)
 
#define FLAT_COPY_PATH(newnode, node, nodetype)
 
#define ADJUST_CHILD_ATTRS(node)
 
#define REPARAMETERIZE_CHILD_PATH(path)
 
#define REPARAMETERIZE_CHILD_PATH_LIST(pathlist)
 

Enumerations

enum  PathCostComparison { COSTS_EQUAL, COSTS_BETTER1, COSTS_BETTER2, COSTS_DIFFERENT }
 

Functions

static Listtranslate_sub_tlist (List *tlist, int relid)
 
static int append_total_cost_compare (const ListCell *a, const ListCell *b)
 
static int append_startup_cost_compare (const ListCell *a, const ListCell *b)
 
static Listreparameterize_pathlist_by_child (PlannerInfo *root, List *pathlist, RelOptInfo *child_rel)
 
int compare_path_costs (Path *path1, Path *path2, CostSelector criterion)
 
int compare_fractional_path_costs (Path *path1, Path *path2, double fraction)
 
static PathCostComparison compare_path_costs_fuzzily (Path *path1, Path *path2, double fuzz_factor)
 
void set_cheapest (RelOptInfo *parent_rel)
 
void add_path (RelOptInfo *parent_rel, Path *new_path)
 
bool add_path_precheck (RelOptInfo *parent_rel, Cost startup_cost, Cost total_cost, List *pathkeys, Relids required_outer)
 
void add_partial_path (RelOptInfo *parent_rel, Path *new_path)
 
bool add_partial_path_precheck (RelOptInfo *parent_rel, Cost total_cost, List *pathkeys)
 
Pathcreate_seqscan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer, int parallel_workers)
 
Pathcreate_samplescan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer)
 
IndexPathcreate_index_path (PlannerInfo *root, IndexOptInfo *index, List *indexclauses, List *indexorderbys, List *indexorderbycols, List *pathkeys, ScanDirection indexscandir, bool indexonly, Relids required_outer, double loop_count, bool partial_path)
 
BitmapHeapPathcreate_bitmap_heap_path (PlannerInfo *root, RelOptInfo *rel, Path *bitmapqual, Relids required_outer, double loop_count, int parallel_degree)
 
BitmapAndPathcreate_bitmap_and_path (PlannerInfo *root, RelOptInfo *rel, List *bitmapquals)
 
BitmapOrPathcreate_bitmap_or_path (PlannerInfo *root, RelOptInfo *rel, List *bitmapquals)
 
TidPathcreate_tidscan_path (PlannerInfo *root, RelOptInfo *rel, List *tidquals, Relids required_outer)
 
AppendPathcreate_append_path (PlannerInfo *root, RelOptInfo *rel, List *subpaths, List *partial_subpaths, List *pathkeys, Relids required_outer, int parallel_workers, bool parallel_aware, double rows)
 
MergeAppendPathcreate_merge_append_path (PlannerInfo *root, RelOptInfo *rel, List *subpaths, List *pathkeys, Relids required_outer)
 
GroupResultPathcreate_group_result_path (PlannerInfo *root, RelOptInfo *rel, PathTarget *target, List *havingqual)
 
MaterialPathcreate_material_path (RelOptInfo *rel, Path *subpath)
 
UniquePathcreate_unique_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, SpecialJoinInfo *sjinfo)
 
GatherMergePathcreate_gather_merge_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, PathTarget *target, List *pathkeys, Relids required_outer, double *rows)
 
GatherPathcreate_gather_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, PathTarget *target, Relids required_outer, double *rows)
 
SubqueryScanPathcreate_subqueryscan_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, List *pathkeys, Relids required_outer)
 
Pathcreate_functionscan_path (PlannerInfo *root, RelOptInfo *rel, List *pathkeys, Relids required_outer)
 
Pathcreate_tablefuncscan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer)
 
Pathcreate_valuesscan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer)
 
Pathcreate_ctescan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer)
 
Pathcreate_namedtuplestorescan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer)
 
Pathcreate_resultscan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer)
 
Pathcreate_worktablescan_path (PlannerInfo *root, RelOptInfo *rel, Relids required_outer)
 
ForeignPathcreate_foreignscan_path (PlannerInfo *root, RelOptInfo *rel, PathTarget *target, double rows, Cost startup_cost, Cost total_cost, List *pathkeys, Relids required_outer, Path *fdw_outerpath, List *fdw_private)
 
ForeignPathcreate_foreign_join_path (PlannerInfo *root, RelOptInfo *rel, PathTarget *target, double rows, Cost startup_cost, Cost total_cost, List *pathkeys, Relids required_outer, Path *fdw_outerpath, List *fdw_private)
 
ForeignPathcreate_foreign_upper_path (PlannerInfo *root, RelOptInfo *rel, PathTarget *target, double rows, Cost startup_cost, Cost total_cost, List *pathkeys, Path *fdw_outerpath, List *fdw_private)
 
Relids calc_nestloop_required_outer (Relids outerrelids, Relids outer_paramrels, Relids innerrelids, Relids inner_paramrels)
 
Relids calc_non_nestloop_required_outer (Path *outer_path, Path *inner_path)
 
NestPathcreate_nestloop_path (PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype, JoinCostWorkspace *workspace, JoinPathExtraData *extra, Path *outer_path, Path *inner_path, List *restrict_clauses, List *pathkeys, Relids required_outer)
 
MergePathcreate_mergejoin_path (PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype, JoinCostWorkspace *workspace, JoinPathExtraData *extra, Path *outer_path, Path *inner_path, List *restrict_clauses, List *pathkeys, Relids required_outer, List *mergeclauses, List *outersortkeys, List *innersortkeys)
 
HashPathcreate_hashjoin_path (PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype, JoinCostWorkspace *workspace, JoinPathExtraData *extra, Path *outer_path, Path *inner_path, bool parallel_hash, List *restrict_clauses, Relids required_outer, List *hashclauses)
 
ProjectionPathcreate_projection_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, PathTarget *target)
 
Pathapply_projection_to_path (PlannerInfo *root, RelOptInfo *rel, Path *path, PathTarget *target)
 
ProjectSetPathcreate_set_projection_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, PathTarget *target)
 
IncrementalSortPathcreate_incremental_sort_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, List *pathkeys, int presorted_keys, double limit_tuples)
 
SortPathcreate_sort_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, List *pathkeys, double limit_tuples)
 
GroupPathcreate_group_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, List *groupClause, List *qual, double numGroups)
 
UpperUniquePathcreate_upper_unique_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, int numCols, double numGroups)
 
AggPathcreate_agg_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, PathTarget *target, AggStrategy aggstrategy, AggSplit aggsplit, List *groupClause, List *qual, const AggClauseCosts *aggcosts, double numGroups)
 
GroupingSetsPathcreate_groupingsets_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, List *having_qual, AggStrategy aggstrategy, List *rollups, const AggClauseCosts *agg_costs, double numGroups)
 
MinMaxAggPathcreate_minmaxagg_path (PlannerInfo *root, RelOptInfo *rel, PathTarget *target, List *mmaggregates, List *quals)
 
WindowAggPathcreate_windowagg_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, PathTarget *target, List *windowFuncs, WindowClause *winclause)
 
SetOpPathcreate_setop_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, SetOpCmd cmd, SetOpStrategy strategy, List *distinctList, AttrNumber flagColIdx, int firstFlag, double numGroups, double outputRows)
 
RecursiveUnionPathcreate_recursiveunion_path (PlannerInfo *root, RelOptInfo *rel, Path *leftpath, Path *rightpath, PathTarget *target, List *distinctList, int wtParam, double numGroups)
 
LockRowsPathcreate_lockrows_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, List *rowMarks, int epqParam)
 
ModifyTablePathcreate_modifytable_path (PlannerInfo *root, RelOptInfo *rel, CmdType operation, bool canSetTag, Index nominalRelation, Index rootRelation, bool partColsUpdated, List *resultRelations, List *subpaths, List *subroots, List *withCheckOptionLists, List *returningLists, List *rowMarks, OnConflictExpr *onconflict, int epqParam)
 
LimitPathcreate_limit_path (PlannerInfo *root, RelOptInfo *rel, Path *subpath, Node *limitOffset, Node *limitCount, LimitOption limitOption, int64 offset_est, int64 count_est)
 
void adjust_limit_rows_costs (double *rows, Cost *startup_cost, Cost *total_cost, int64 offset_est, int64 count_est)
 
Pathreparameterize_path (PlannerInfo *root, Path *path, Relids required_outer, double loop_count)
 
Pathreparameterize_path_by_child (PlannerInfo *root, Path *path, RelOptInfo *child_rel)
 

Macro Definition Documentation

◆ ADJUST_CHILD_ATTRS

#define ADJUST_CHILD_ATTRS (   node)
Value:
((node) = \
child_rel->relids, \
child_rel->top_parent_relids))
Definition: nodes.h:530
Node * adjust_appendrel_attrs_multilevel(PlannerInfo *root, Node *node, Relids child_relids, Relids top_parent_relids)
Definition: appendinfo.c:502
Definition: pg_list.h:50

Referenced by reparameterize_path_by_child().

◆ CONSIDER_PATH_STARTUP_COST

#define CONSIDER_PATH_STARTUP_COST (   p)    ((p)->param_info == NULL ? (p)->parent->consider_startup : (p)->parent->consider_param_startup)

◆ FLAT_COPY_PATH

#define FLAT_COPY_PATH (   newnode,
  node,
  nodetype 
)
Value:
( (newnode) = makeNode(nodetype), \
memcpy((newnode), (node), sizeof(nodetype)) )
#define makeNode(_type_)
Definition: nodes.h:578

Referenced by reparameterize_path_by_child().

◆ REPARAMETERIZE_CHILD_PATH

#define REPARAMETERIZE_CHILD_PATH (   path)
Value:
do { \
(path) = reparameterize_path_by_child(root, (path), child_rel); \
if ((path) == NULL) \
return NULL; \
} while(0)
Path * reparameterize_path_by_child(PlannerInfo *root, Path *path, RelOptInfo *child_rel)
Definition: pathnode.c:3874

Referenced by reparameterize_path_by_child().

◆ REPARAMETERIZE_CHILD_PATH_LIST

#define REPARAMETERIZE_CHILD_PATH_LIST (   pathlist)
Value:
do { \
if ((pathlist) != NIL) \
{ \
(pathlist) = reparameterize_pathlist_by_child(root, (pathlist), \
child_rel); \
if ((pathlist) == NIL) \
return NULL; \
} \
} while(0)
#define NIL
Definition: pg_list.h:65
static List * reparameterize_pathlist_by_child(PlannerInfo *root, List *pathlist, RelOptInfo *child_rel)
Definition: pathnode.c:4142

Referenced by reparameterize_path_by_child().

◆ STD_FUZZ_FACTOR

#define STD_FUZZ_FACTOR   1.01

Enumeration Type Documentation

◆ PathCostComparison

Enumerator
COSTS_EQUAL 
COSTS_BETTER1 
COSTS_BETTER2 
COSTS_DIFFERENT 

Definition at line 38 of file pathnode.c.

39 {
40  COSTS_EQUAL, /* path costs are fuzzily equal */
41  COSTS_BETTER1, /* first path is cheaper than second */
42  COSTS_BETTER2, /* second path is cheaper than first */
43  COSTS_DIFFERENT /* neither path dominates the other on cost */
PathCostComparison
Definition: pathnode.c:38

Function Documentation

◆ add_partial_path()

void add_partial_path ( RelOptInfo parent_rel,
Path new_path 
)

Definition at line 749 of file pathnode.c.

References Assert, CHECK_FOR_INTERRUPTS, compare_pathkeys(), RelOptInfo::consider_parallel, foreach_current_index, foreach_delete_current, lfirst, list_insert_nth(), Path::parallel_safe, RelOptInfo::partial_pathlist, Path::pathkeys, PATHKEYS_BETTER1, PATHKEYS_BETTER2, PATHKEYS_DIFFERENT, pfree(), STD_FUZZ_FACTOR, and Path::total_cost.

Referenced by add_paths_to_append_rel(), build_index_paths(), create_partial_bitmap_paths(), create_partial_grouping_paths(), create_plain_partial_paths(), grouping_planner(), recurse_set_operations(), set_subquery_pathlist(), try_partial_hashjoin_path(), try_partial_mergejoin_path(), and try_partial_nestloop_path().

750 {
751  bool accept_new = true; /* unless we find a superior old path */
752  int insert_at = 0; /* where to insert new item */
753  ListCell *p1;
754 
755  /* Check for query cancel. */
757 
758  /* Path to be added must be parallel safe. */
759  Assert(new_path->parallel_safe);
760 
761  /* Relation should be OK for parallelism, too. */
762  Assert(parent_rel->consider_parallel);
763 
764  /*
765  * As in add_path, throw out any paths which are dominated by the new
766  * path, but throw out the new path if some existing path dominates it.
767  */
768  foreach(p1, parent_rel->partial_pathlist)
769  {
770  Path *old_path = (Path *) lfirst(p1);
771  bool remove_old = false; /* unless new proves superior */
772  PathKeysComparison keyscmp;
773 
774  /* Compare pathkeys. */
775  keyscmp = compare_pathkeys(new_path->pathkeys, old_path->pathkeys);
776 
777  /* Unless pathkeys are incompatible, keep just one of the two paths. */
778  if (keyscmp != PATHKEYS_DIFFERENT)
779  {
780  if (new_path->total_cost > old_path->total_cost * STD_FUZZ_FACTOR)
781  {
782  /* New path costs more; keep it only if pathkeys are better. */
783  if (keyscmp != PATHKEYS_BETTER1)
784  accept_new = false;
785  }
786  else if (old_path->total_cost > new_path->total_cost
787  * STD_FUZZ_FACTOR)
788  {
789  /* Old path costs more; keep it only if pathkeys are better. */
790  if (keyscmp != PATHKEYS_BETTER2)
791  remove_old = true;
792  }
793  else if (keyscmp == PATHKEYS_BETTER1)
794  {
795  /* Costs are about the same, new path has better pathkeys. */
796  remove_old = true;
797  }
798  else if (keyscmp == PATHKEYS_BETTER2)
799  {
800  /* Costs are about the same, old path has better pathkeys. */
801  accept_new = false;
802  }
803  else if (old_path->total_cost > new_path->total_cost * 1.0000000001)
804  {
805  /* Pathkeys are the same, and the old path costs more. */
806  remove_old = true;
807  }
808  else
809  {
810  /*
811  * Pathkeys are the same, and new path isn't materially
812  * cheaper.
813  */
814  accept_new = false;
815  }
816  }
817 
818  /*
819  * Remove current element from partial_pathlist if dominated by new.
820  */
821  if (remove_old)
822  {
823  parent_rel->partial_pathlist =
824  foreach_delete_current(parent_rel->partial_pathlist, p1);
825  pfree(old_path);
826  }
827  else
828  {
829  /* new belongs after this old path if it has cost >= old's */
830  if (new_path->total_cost >= old_path->total_cost)
831  insert_at = foreach_current_index(p1) + 1;
832  }
833 
834  /*
835  * If we found an old path that dominates new_path, we can quit
836  * scanning the partial_pathlist; we will not add new_path, and we
837  * assume new_path cannot dominate any later path.
838  */
839  if (!accept_new)
840  break;
841  }
842 
843  if (accept_new)
844  {
845  /* Accept the new path: insert it at proper place */
846  parent_rel->partial_pathlist =
847  list_insert_nth(parent_rel->partial_pathlist, insert_at, new_path);
848  }
849  else
850  {
851  /* Reject and recycle the new path */
852  pfree(new_path);
853  }
854 }
List * partial_pathlist
Definition: pathnodes.h:682
PathKeysComparison compare_pathkeys(List *keys1, List *keys2)
Definition: pathkeys.c:285
#define foreach_delete_current(lst, cell)
Definition: pg_list.h:369
List * list_insert_nth(List *list, int pos, void *datum)
Definition: list.c:415
void pfree(void *pointer)
Definition: mcxt.c:1057
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define Assert(condition)
Definition: c.h:804
#define lfirst(lc)
Definition: pg_list.h:169
bool parallel_safe
Definition: pathnodes.h:1154
#define STD_FUZZ_FACTOR
Definition: pathnode.c:51
bool consider_parallel
Definition: pathnodes.h:674
PathKeysComparison
Definition: paths.h:188
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:100
#define foreach_current_index(cell)
Definition: pg_list.h:382

◆ add_partial_path_precheck()

bool add_partial_path_precheck ( RelOptInfo parent_rel,
Cost  total_cost,
List pathkeys 
)

Definition at line 867 of file pathnode.c.

References add_path_precheck(), compare_pathkeys(), lfirst, RelOptInfo::partial_pathlist, Path::pathkeys, PATHKEYS_BETTER1, PATHKEYS_BETTER2, PATHKEYS_DIFFERENT, STD_FUZZ_FACTOR, and Path::total_cost.

Referenced by try_partial_hashjoin_path(), try_partial_mergejoin_path(), and try_partial_nestloop_path().

869 {
870  ListCell *p1;
871 
872  /*
873  * Our goal here is twofold. First, we want to find out whether this path
874  * is clearly inferior to some existing partial path. If so, we want to
875  * reject it immediately. Second, we want to find out whether this path
876  * is clearly superior to some existing partial path -- at least, modulo
877  * final cost computations. If so, we definitely want to consider it.
878  *
879  * Unlike add_path(), we always compare pathkeys here. This is because we
880  * expect partial_pathlist to be very short, and getting a definitive
881  * answer at this stage avoids the need to call add_path_precheck.
882  */
883  foreach(p1, parent_rel->partial_pathlist)
884  {
885  Path *old_path = (Path *) lfirst(p1);
886  PathKeysComparison keyscmp;
887 
888  keyscmp = compare_pathkeys(pathkeys, old_path->pathkeys);
889  if (keyscmp != PATHKEYS_DIFFERENT)
890  {
891  if (total_cost > old_path->total_cost * STD_FUZZ_FACTOR &&
892  keyscmp != PATHKEYS_BETTER1)
893  return false;
894  if (old_path->total_cost > total_cost * STD_FUZZ_FACTOR &&
895  keyscmp != PATHKEYS_BETTER2)
896  return true;
897  }
898  }
899 
900  /*
901  * This path is neither clearly inferior to an existing partial path nor
902  * clearly good enough that it might replace one. Compare it to
903  * non-parallel plans. If it loses even before accounting for the cost of
904  * the Gather node, we should definitely reject it.
905  *
906  * Note that we pass the total_cost to add_path_precheck twice. This is
907  * because it's never advantageous to consider the startup cost of a
908  * partial path; the resulting plans, if run in parallel, will be run to
909  * completion.
910  */
911  if (!add_path_precheck(parent_rel, total_cost, total_cost, pathkeys,
912  NULL))
913  return false;
914 
915  return true;
916 }
bool add_path_precheck(RelOptInfo *parent_rel, Cost startup_cost, Cost total_cost, List *pathkeys, Relids required_outer)
Definition: pathnode.c:644
List * partial_pathlist
Definition: pathnodes.h:682
PathKeysComparison compare_pathkeys(List *keys1, List *keys2)
Definition: pathkeys.c:285
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define lfirst(lc)
Definition: pg_list.h:169
#define STD_FUZZ_FACTOR
Definition: pathnode.c:51
PathKeysComparison
Definition: paths.h:188

◆ add_path()

void add_path ( RelOptInfo parent_rel,
Path new_path 
)

Definition at line 422 of file pathnode.c.

References BMS_EQUAL, BMS_SUBSET1, BMS_SUBSET2, bms_subset_compare(), CHECK_FOR_INTERRUPTS, compare_path_costs_fuzzily(), compare_pathkeys(), COSTS_BETTER1, COSTS_BETTER2, COSTS_DIFFERENT, COSTS_EQUAL, foreach_current_index, foreach_delete_current, IsA, lfirst, list_insert_nth(), NIL, Path::parallel_safe, Path::param_info, PATH_REQ_OUTER, Path::pathkeys, PATHKEYS_BETTER1, PATHKEYS_BETTER2, PATHKEYS_DIFFERENT, RelOptInfo::pathlist, pfree(), Path::rows, STD_FUZZ_FACTOR, and Path::total_cost.

Referenced by add_foreign_final_paths(), add_foreign_grouping_paths(), add_foreign_ordered_paths(), add_paths_to_append_rel(), add_paths_to_grouping_rel(), add_paths_with_pathkeys_for_rel(), BuildParameterizedTidPaths(), consider_groupingsets_paths(), create_degenerate_grouping_paths(), create_distinct_paths(), create_index_paths(), create_one_window_path(), create_ordered_paths(), create_partial_grouping_paths(), create_tidscan_paths(), fileGetForeignPaths(), gather_grouping_paths(), generate_gather_paths(), generate_nonunion_paths(), generate_orderedappend_paths(), generate_recursion_path(), generate_union_paths(), generate_useful_gather_paths(), get_index_paths(), grouping_planner(), inheritance_planner(), mark_dummy_rel(), postgresGetForeignJoinPaths(), postgresGetForeignPaths(), preprocess_minmax_aggregates(), query_planner(), recurse_set_operations(), set_cte_pathlist(), set_dummy_rel_pathlist(), set_function_pathlist(), set_namedtuplestore_pathlist(), set_plain_rel_pathlist(), set_result_pathlist(), set_subquery_pathlist(), set_tablefunc_pathlist(), set_tablesample_rel_pathlist(), set_values_pathlist(), set_worktable_pathlist(), try_hashjoin_path(), try_mergejoin_path(), and try_nestloop_path().

423 {
424  bool accept_new = true; /* unless we find a superior old path */
425  int insert_at = 0; /* where to insert new item */
426  List *new_path_pathkeys;
427  ListCell *p1;
428 
429  /*
430  * This is a convenient place to check for query cancel --- no part of the
431  * planner goes very long without calling add_path().
432  */
434 
435  /* Pretend parameterized paths have no pathkeys, per comment above */
436  new_path_pathkeys = new_path->param_info ? NIL : new_path->pathkeys;
437 
438  /*
439  * Loop to check proposed new path against old paths. Note it is possible
440  * for more than one old path to be tossed out because new_path dominates
441  * it.
442  */
443  foreach(p1, parent_rel->pathlist)
444  {
445  Path *old_path = (Path *) lfirst(p1);
446  bool remove_old = false; /* unless new proves superior */
447  PathCostComparison costcmp;
448  PathKeysComparison keyscmp;
449  BMS_Comparison outercmp;
450 
451  /*
452  * Do a fuzzy cost comparison with standard fuzziness limit.
453  */
454  costcmp = compare_path_costs_fuzzily(new_path, old_path,
456 
457  /*
458  * If the two paths compare differently for startup and total cost,
459  * then we want to keep both, and we can skip comparing pathkeys and
460  * required_outer rels. If they compare the same, proceed with the
461  * other comparisons. Row count is checked last. (We make the tests
462  * in this order because the cost comparison is most likely to turn
463  * out "different", and the pathkeys comparison next most likely. As
464  * explained above, row count very seldom makes a difference, so even
465  * though it's cheap to compare there's not much point in checking it
466  * earlier.)
467  */
468  if (costcmp != COSTS_DIFFERENT)
469  {
470  /* Similarly check to see if either dominates on pathkeys */
471  List *old_path_pathkeys;
472 
473  old_path_pathkeys = old_path->param_info ? NIL : old_path->pathkeys;
474  keyscmp = compare_pathkeys(new_path_pathkeys,
475  old_path_pathkeys);
476  if (keyscmp != PATHKEYS_DIFFERENT)
477  {
478  switch (costcmp)
479  {
480  case COSTS_EQUAL:
481  outercmp = bms_subset_compare(PATH_REQ_OUTER(new_path),
482  PATH_REQ_OUTER(old_path));
483  if (keyscmp == PATHKEYS_BETTER1)
484  {
485  if ((outercmp == BMS_EQUAL ||
486  outercmp == BMS_SUBSET1) &&
487  new_path->rows <= old_path->rows &&
488  new_path->parallel_safe >= old_path->parallel_safe)
489  remove_old = true; /* new dominates old */
490  }
491  else if (keyscmp == PATHKEYS_BETTER2)
492  {
493  if ((outercmp == BMS_EQUAL ||
494  outercmp == BMS_SUBSET2) &&
495  new_path->rows >= old_path->rows &&
496  new_path->parallel_safe <= old_path->parallel_safe)
497  accept_new = false; /* old dominates new */
498  }
499  else /* keyscmp == PATHKEYS_EQUAL */
500  {
501  if (outercmp == BMS_EQUAL)
502  {
503  /*
504  * Same pathkeys and outer rels, and fuzzily
505  * the same cost, so keep just one; to decide
506  * which, first check parallel-safety, then
507  * rows, then do a fuzzy cost comparison with
508  * very small fuzz limit. (We used to do an
509  * exact cost comparison, but that results in
510  * annoying platform-specific plan variations
511  * due to roundoff in the cost estimates.) If
512  * things are still tied, arbitrarily keep
513  * only the old path. Notice that we will
514  * keep only the old path even if the
515  * less-fuzzy comparison decides the startup
516  * and total costs compare differently.
517  */
518  if (new_path->parallel_safe >
519  old_path->parallel_safe)
520  remove_old = true; /* new dominates old */
521  else if (new_path->parallel_safe <
522  old_path->parallel_safe)
523  accept_new = false; /* old dominates new */
524  else if (new_path->rows < old_path->rows)
525  remove_old = true; /* new dominates old */
526  else if (new_path->rows > old_path->rows)
527  accept_new = false; /* old dominates new */
528  else if (compare_path_costs_fuzzily(new_path,
529  old_path,
530  1.0000000001) == COSTS_BETTER1)
531  remove_old = true; /* new dominates old */
532  else
533  accept_new = false; /* old equals or
534  * dominates new */
535  }
536  else if (outercmp == BMS_SUBSET1 &&
537  new_path->rows <= old_path->rows &&
538  new_path->parallel_safe >= old_path->parallel_safe)
539  remove_old = true; /* new dominates old */
540  else if (outercmp == BMS_SUBSET2 &&
541  new_path->rows >= old_path->rows &&
542  new_path->parallel_safe <= old_path->parallel_safe)
543  accept_new = false; /* old dominates new */
544  /* else different parameterizations, keep both */
545  }
546  break;
547  case COSTS_BETTER1:
548  if (keyscmp != PATHKEYS_BETTER2)
549  {
550  outercmp = bms_subset_compare(PATH_REQ_OUTER(new_path),
551  PATH_REQ_OUTER(old_path));
552  if ((outercmp == BMS_EQUAL ||
553  outercmp == BMS_SUBSET1) &&
554  new_path->rows <= old_path->rows &&
555  new_path->parallel_safe >= old_path->parallel_safe)
556  remove_old = true; /* new dominates old */
557  }
558  break;
559  case COSTS_BETTER2:
560  if (keyscmp != PATHKEYS_BETTER1)
561  {
562  outercmp = bms_subset_compare(PATH_REQ_OUTER(new_path),
563  PATH_REQ_OUTER(old_path));
564  if ((outercmp == BMS_EQUAL ||
565  outercmp == BMS_SUBSET2) &&
566  new_path->rows >= old_path->rows &&
567  new_path->parallel_safe <= old_path->parallel_safe)
568  accept_new = false; /* old dominates new */
569  }
570  break;
571  case COSTS_DIFFERENT:
572 
573  /*
574  * can't get here, but keep this case to keep compiler
575  * quiet
576  */
577  break;
578  }
579  }
580  }
581 
582  /*
583  * Remove current element from pathlist if dominated by new.
584  */
585  if (remove_old)
586  {
587  parent_rel->pathlist = foreach_delete_current(parent_rel->pathlist,
588  p1);
589 
590  /*
591  * Delete the data pointed-to by the deleted cell, if possible
592  */
593  if (!IsA(old_path, IndexPath))
594  pfree(old_path);
595  }
596  else
597  {
598  /* new belongs after this old path if it has cost >= old's */
599  if (new_path->total_cost >= old_path->total_cost)
600  insert_at = foreach_current_index(p1) + 1;
601  }
602 
603  /*
604  * If we found an old path that dominates new_path, we can quit
605  * scanning the pathlist; we will not add new_path, and we assume
606  * new_path cannot dominate any other elements of the pathlist.
607  */
608  if (!accept_new)
609  break;
610  }
611 
612  if (accept_new)
613  {
614  /* Accept the new path: insert it at proper place in pathlist */
615  parent_rel->pathlist =
616  list_insert_nth(parent_rel->pathlist, insert_at, new_path);
617  }
618  else
619  {
620  /* Reject and recycle the new path */
621  if (!IsA(new_path, IndexPath))
622  pfree(new_path);
623  }
624 }
#define NIL
Definition: pg_list.h:65
#define IsA(nodeptr, _type_)
Definition: nodes.h:581
ParamPathInfo * param_info
Definition: pathnodes.h:1151
PathKeysComparison compare_pathkeys(List *keys1, List *keys2)
Definition: pathkeys.c:285
#define foreach_delete_current(lst, cell)
Definition: pg_list.h:369
List * list_insert_nth(List *list, int pos, void *datum)
Definition: list.c:415
void pfree(void *pointer)
Definition: mcxt.c:1057
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
static PathCostComparison compare_path_costs_fuzzily(Path *path1, Path *path2, double fuzz_factor)
Definition: pathnode.c:166
PathCostComparison
Definition: pathnode.c:38
BMS_Comparison bms_subset_compare(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:352
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define lfirst(lc)
Definition: pg_list.h:169
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
#define STD_FUZZ_FACTOR
Definition: pathnode.c:51
PathKeysComparison
Definition: paths.h:188
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:100
List * pathlist
Definition: pathnodes.h:680
Definition: pg_list.h:50
BMS_Comparison
Definition: bitmapset.h:57
#define foreach_current_index(cell)
Definition: pg_list.h:382

◆ add_path_precheck()

bool add_path_precheck ( RelOptInfo parent_rel,
Cost  startup_cost,
Cost  total_cost,
List pathkeys,
Relids  required_outer 
)

Definition at line 644 of file pathnode.c.

References bms_equal(), compare_pathkeys(), RelOptInfo::consider_param_startup, RelOptInfo::consider_startup, lfirst, NIL, Path::param_info, PATH_REQ_OUTER, Path::pathkeys, PATHKEYS_BETTER2, PATHKEYS_EQUAL, RelOptInfo::pathlist, Path::startup_cost, STD_FUZZ_FACTOR, and Path::total_cost.

Referenced by add_partial_path_precheck(), try_hashjoin_path(), try_mergejoin_path(), and try_nestloop_path().

647 {
648  List *new_path_pathkeys;
649  bool consider_startup;
650  ListCell *p1;
651 
652  /* Pretend parameterized paths have no pathkeys, per add_path policy */
653  new_path_pathkeys = required_outer ? NIL : pathkeys;
654 
655  /* Decide whether new path's startup cost is interesting */
656  consider_startup = required_outer ? parent_rel->consider_param_startup : parent_rel->consider_startup;
657 
658  foreach(p1, parent_rel->pathlist)
659  {
660  Path *old_path = (Path *) lfirst(p1);
661  PathKeysComparison keyscmp;
662 
663  /*
664  * We are looking for an old_path with the same parameterization (and
665  * by assumption the same rowcount) that dominates the new path on
666  * pathkeys as well as both cost metrics. If we find one, we can
667  * reject the new path.
668  *
669  * Cost comparisons here should match compare_path_costs_fuzzily.
670  */
671  if (total_cost > old_path->total_cost * STD_FUZZ_FACTOR)
672  {
673  /* new path can win on startup cost only if consider_startup */
674  if (startup_cost > old_path->startup_cost * STD_FUZZ_FACTOR ||
675  !consider_startup)
676  {
677  /* new path loses on cost, so check pathkeys... */
678  List *old_path_pathkeys;
679 
680  old_path_pathkeys = old_path->param_info ? NIL : old_path->pathkeys;
681  keyscmp = compare_pathkeys(new_path_pathkeys,
682  old_path_pathkeys);
683  if (keyscmp == PATHKEYS_EQUAL ||
684  keyscmp == PATHKEYS_BETTER2)
685  {
686  /* new path does not win on pathkeys... */
687  if (bms_equal(required_outer, PATH_REQ_OUTER(old_path)))
688  {
689  /* Found an old path that dominates the new one */
690  return false;
691  }
692  }
693  }
694  }
695  else
696  {
697  /*
698  * Since the pathlist is sorted by total_cost, we can stop looking
699  * once we reach a path with a total_cost larger than the new
700  * path's.
701  */
702  break;
703  }
704  }
705 
706  return true;
707 }
#define NIL
Definition: pg_list.h:65
bool consider_param_startup
Definition: pathnodes.h:673
ParamPathInfo * param_info
Definition: pathnodes.h:1151
PathKeysComparison compare_pathkeys(List *keys1, List *keys2)
Definition: pathkeys.c:285
bool consider_startup
Definition: pathnodes.h:672
Cost startup_cost
Definition: pathnodes.h:1159
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define lfirst(lc)
Definition: pg_list.h:169
#define STD_FUZZ_FACTOR
Definition: pathnode.c:51
PathKeysComparison
Definition: paths.h:188
List * pathlist
Definition: pathnodes.h:680
Definition: pg_list.h:50
bool bms_equal(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:94

◆ adjust_limit_rows_costs()

void adjust_limit_rows_costs ( double *  rows,
Cost startup_cost,
Cost total_cost,
int64  offset_est,
int64  count_est 
)

Definition at line 3689 of file pathnode.c.

References clamp_row_est().

Referenced by create_limit_path(), and estimate_path_cost_size().

3694 {
3695  double input_rows = *rows;
3696  Cost input_startup_cost = *startup_cost;
3697  Cost input_total_cost = *total_cost;
3698 
3699  if (offset_est != 0)
3700  {
3701  double offset_rows;
3702 
3703  if (offset_est > 0)
3704  offset_rows = (double) offset_est;
3705  else
3706  offset_rows = clamp_row_est(input_rows * 0.10);
3707  if (offset_rows > *rows)
3708  offset_rows = *rows;
3709  if (input_rows > 0)
3710  *startup_cost +=
3711  (input_total_cost - input_startup_cost)
3712  * offset_rows / input_rows;
3713  *rows -= offset_rows;
3714  if (*rows < 1)
3715  *rows = 1;
3716  }
3717 
3718  if (count_est != 0)
3719  {
3720  double count_rows;
3721 
3722  if (count_est > 0)
3723  count_rows = (double) count_est;
3724  else
3725  count_rows = clamp_row_est(input_rows * 0.10);
3726  if (count_rows > *rows)
3727  count_rows = *rows;
3728  if (input_rows > 0)
3729  *total_cost = *startup_cost +
3730  (input_total_cost - input_startup_cost)
3731  * count_rows / input_rows;
3732  *rows = count_rows;
3733  if (*rows < 1)
3734  *rows = 1;
3735  }
3736 }
double clamp_row_est(double nrows)
Definition: costsize.c:196
double Cost
Definition: nodes.h:664

◆ append_startup_cost_compare()

static int append_startup_cost_compare ( const ListCell a,
const ListCell b 
)
static

Definition at line 1357 of file pathnode.c.

References bms_compare(), cmp(), compare_path_costs(), lfirst, Path::parent, RelOptInfo::relids, and STARTUP_COST.

Referenced by create_append_path().

1358 {
1359  Path *path1 = (Path *) lfirst(a);
1360  Path *path2 = (Path *) lfirst(b);
1361  int cmp;
1362 
1363  cmp = compare_path_costs(path1, path2, STARTUP_COST);
1364  if (cmp != 0)
1365  return -cmp;
1366  return bms_compare(path1->parent->relids, path2->parent->relids);
1367 }
int bms_compare(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:147
RelOptInfo * parent
Definition: pathnodes.h:1148
int compare_path_costs(Path *path1, Path *path2, CostSelector criterion)
Definition: pathnode.c:71
Relids relids
Definition: pathnodes.h:666
#define lfirst(lc)
Definition: pg_list.h:169
static int cmp(const chr *x, const chr *y, size_t len)
Definition: regc_locale.c:747

◆ append_total_cost_compare()

static int append_total_cost_compare ( const ListCell a,
const ListCell b 
)
static

Definition at line 1335 of file pathnode.c.

References bms_compare(), cmp(), compare_path_costs(), lfirst, Path::parent, RelOptInfo::relids, and TOTAL_COST.

Referenced by create_append_path().

1336 {
1337  Path *path1 = (Path *) lfirst(a);
1338  Path *path2 = (Path *) lfirst(b);
1339  int cmp;
1340 
1341  cmp = compare_path_costs(path1, path2, TOTAL_COST);
1342  if (cmp != 0)
1343  return -cmp;
1344  return bms_compare(path1->parent->relids, path2->parent->relids);
1345 }
int bms_compare(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:147
RelOptInfo * parent
Definition: pathnodes.h:1148
int compare_path_costs(Path *path1, Path *path2, CostSelector criterion)
Definition: pathnode.c:71
Relids relids
Definition: pathnodes.h:666
#define lfirst(lc)
Definition: pg_list.h:169
static int cmp(const chr *x, const chr *y, size_t len)
Definition: regc_locale.c:747

◆ apply_projection_to_path()

Path* apply_projection_to_path ( PlannerInfo root,
RelOptInfo rel,
Path path,
PathTarget target 
)

Definition at line 2640 of file pathnode.c.

References PathTarget::cost, create_projection_path(), PathTarget::exprs, is_parallel_safe(), is_projection_capable_path(), IsA, Path::parallel_safe, Path::parent, Path::pathtarget, QualCost::per_tuple, Path::rows, QualCost::startup, Path::startup_cost, GatherPath::subpath, GatherMergePath::subpath, and Path::total_cost.

Referenced by adjust_paths_for_srfs(), build_minmax_path(), create_ordered_paths(), and recurse_set_operations().

2644 {
2645  QualCost oldcost;
2646 
2647  /*
2648  * If given path can't project, we might need a Result node, so make a
2649  * separate ProjectionPath.
2650  */
2651  if (!is_projection_capable_path(path))
2652  return (Path *) create_projection_path(root, rel, path, target);
2653 
2654  /*
2655  * We can just jam the desired tlist into the existing path, being sure to
2656  * update its cost estimates appropriately.
2657  */
2658  oldcost = path->pathtarget->cost;
2659  path->pathtarget = target;
2660 
2661  path->startup_cost += target->cost.startup - oldcost.startup;
2662  path->total_cost += target->cost.startup - oldcost.startup +
2663  (target->cost.per_tuple - oldcost.per_tuple) * path->rows;
2664 
2665  /*
2666  * If the path happens to be a Gather or GatherMerge path, we'd like to
2667  * arrange for the subpath to return the required target list so that
2668  * workers can help project. But if there is something that is not
2669  * parallel-safe in the target expressions, then we can't.
2670  */
2671  if ((IsA(path, GatherPath) || IsA(path, GatherMergePath)) &&
2672  is_parallel_safe(root, (Node *) target->exprs))
2673  {
2674  /*
2675  * We always use create_projection_path here, even if the subpath is
2676  * projection-capable, so as to avoid modifying the subpath in place.
2677  * It seems unlikely at present that there could be any other
2678  * references to the subpath, but better safe than sorry.
2679  *
2680  * Note that we don't change the parallel path's cost estimates; it
2681  * might be appropriate to do so, to reflect the fact that the bulk of
2682  * the target evaluation will happen in workers.
2683  */
2684  if (IsA(path, GatherPath))
2685  {
2686  GatherPath *gpath = (GatherPath *) path;
2687 
2688  gpath->subpath = (Path *)
2690  gpath->subpath->parent,
2691  gpath->subpath,
2692  target);
2693  }
2694  else
2695  {
2696  GatherMergePath *gmpath = (GatherMergePath *) path;
2697 
2698  gmpath->subpath = (Path *)
2700  gmpath->subpath->parent,
2701  gmpath->subpath,
2702  target);
2703  }
2704  }
2705  else if (path->parallel_safe &&
2706  !is_parallel_safe(root, (Node *) target->exprs))
2707  {
2708  /*
2709  * We're inserting a parallel-restricted target list into a path
2710  * currently marked parallel-safe, so we have to mark it as no longer
2711  * safe.
2712  */
2713  path->parallel_safe = false;
2714  }
2715 
2716  return path;
2717 }
#define IsA(nodeptr, _type_)
Definition: nodes.h:581
PathTarget * pathtarget
Definition: pathnodes.h:1149
Definition: nodes.h:530
ProjectionPath * create_projection_path(PlannerInfo *root, RelOptInfo *rel, Path *subpath, PathTarget *target)
Definition: pathnode.c:2549
Cost startup
Definition: pathnodes.h:45
bool is_parallel_safe(PlannerInfo *root, Node *node)
Definition: clauses.c:567
Cost per_tuple
Definition: pathnodes.h:46
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
Path * subpath
Definition: pathnodes.h:1495
List * exprs
Definition: pathnodes.h:1078
Cost total_cost
Definition: pathnodes.h:1160
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
bool is_projection_capable_path(Path *path)
Definition: createplan.c:6926

◆ calc_nestloop_required_outer()

Relids calc_nestloop_required_outer ( Relids  outerrelids,
Relids  outer_paramrels,
Relids  innerrelids,
Relids  inner_paramrels 
)

Definition at line 2263 of file pathnode.c.

References Assert, bms_copy(), bms_del_members(), bms_free(), bms_is_empty(), bms_overlap(), and bms_union().

Referenced by try_nestloop_path().

2267 {
2268  Relids required_outer;
2269 
2270  /* inner_path can require rels from outer path, but not vice versa */
2271  Assert(!bms_overlap(outer_paramrels, innerrelids));
2272  /* easy case if inner path is not parameterized */
2273  if (!inner_paramrels)
2274  return bms_copy(outer_paramrels);
2275  /* else, form the union ... */
2276  required_outer = bms_union(outer_paramrels, inner_paramrels);
2277  /* ... and remove any mention of now-satisfied outer rels */
2278  required_outer = bms_del_members(required_outer,
2279  outerrelids);
2280  /* maintain invariant that required_outer is exactly NULL if empty */
2281  if (bms_is_empty(required_outer))
2282  {
2283  bms_free(required_outer);
2284  required_outer = NULL;
2285  }
2286  return required_outer;
2287 }
Bitmapset * bms_copy(const Bitmapset *a)
Definition: bitmapset.c:74
bool bms_is_empty(const Bitmapset *a)
Definition: bitmapset.c:701
void bms_free(Bitmapset *a)
Definition: bitmapset.c:208
#define Assert(condition)
Definition: c.h:804
Bitmapset * bms_union(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:225
Bitmapset * bms_del_members(Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:928
bool bms_overlap(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:494

◆ calc_non_nestloop_required_outer()

Relids calc_non_nestloop_required_outer ( Path outer_path,
Path inner_path 
)

Definition at line 2296 of file pathnode.c.

References Assert, bms_overlap(), bms_union(), Path::parent, PATH_REQ_OUTER, and RelOptInfo::relids.

Referenced by try_hashjoin_path(), and try_mergejoin_path().

2297 {
2298  Relids outer_paramrels = PATH_REQ_OUTER(outer_path);
2299  Relids inner_paramrels = PATH_REQ_OUTER(inner_path);
2300  Relids required_outer;
2301 
2302  /* neither path can require rels from the other */
2303  Assert(!bms_overlap(outer_paramrels, inner_path->parent->relids));
2304  Assert(!bms_overlap(inner_paramrels, outer_path->parent->relids));
2305  /* form the union ... */
2306  required_outer = bms_union(outer_paramrels, inner_paramrels);
2307  /* we do not need an explicit test for empty; bms_union gets it right */
2308  return required_outer;
2309 }
RelOptInfo * parent
Definition: pathnodes.h:1148
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
Relids relids
Definition: pathnodes.h:666
#define Assert(condition)
Definition: c.h:804
Bitmapset * bms_union(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:225
bool bms_overlap(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:494

◆ compare_fractional_path_costs()

int compare_fractional_path_costs ( Path path1,
Path path2,
double  fraction 
)

Definition at line 117 of file pathnode.c.

References compare_path_costs(), Path::startup_cost, TOTAL_COST, and Path::total_cost.

Referenced by choose_hashed_setop(), get_cheapest_fractional_path(), and get_cheapest_fractional_path_for_pathkeys().

119 {
120  Cost cost1,
121  cost2;
122 
123  if (fraction <= 0.0 || fraction >= 1.0)
124  return compare_path_costs(path1, path2, TOTAL_COST);
125  cost1 = path1->startup_cost +
126  fraction * (path1->total_cost - path1->startup_cost);
127  cost2 = path2->startup_cost +
128  fraction * (path2->total_cost - path2->startup_cost);
129  if (cost1 < cost2)
130  return -1;
131  if (cost1 > cost2)
132  return +1;
133  return 0;
134 }
Cost startup_cost
Definition: pathnodes.h:1159
int compare_path_costs(Path *path1, Path *path2, CostSelector criterion)
Definition: pathnode.c:71
Cost total_cost
Definition: pathnodes.h:1160
double Cost
Definition: nodes.h:664

◆ compare_path_costs()

int compare_path_costs ( Path path1,
Path path2,
CostSelector  criterion 
)

Definition at line 71 of file pathnode.c.

References STARTUP_COST, Path::startup_cost, and Path::total_cost.

Referenced by append_startup_cost_compare(), append_total_cost_compare(), compare_fractional_path_costs(), generate_mergejoin_paths(), get_cheapest_parameterized_child_path(), get_cheapest_path_for_pathkeys(), and set_cheapest().

72 {
73  if (criterion == STARTUP_COST)
74  {
75  if (path1->startup_cost < path2->startup_cost)
76  return -1;
77  if (path1->startup_cost > path2->startup_cost)
78  return +1;
79 
80  /*
81  * If paths have the same startup cost (not at all unlikely), order
82  * them by total cost.
83  */
84  if (path1->total_cost < path2->total_cost)
85  return -1;
86  if (path1->total_cost > path2->total_cost)
87  return +1;
88  }
89  else
90  {
91  if (path1->total_cost < path2->total_cost)
92  return -1;
93  if (path1->total_cost > path2->total_cost)
94  return +1;
95 
96  /*
97  * If paths have the same total cost, order them by startup cost.
98  */
99  if (path1->startup_cost < path2->startup_cost)
100  return -1;
101  if (path1->startup_cost > path2->startup_cost)
102  return +1;
103  }
104  return 0;
105 }
Cost startup_cost
Definition: pathnodes.h:1159
Cost total_cost
Definition: pathnodes.h:1160

◆ compare_path_costs_fuzzily()

static PathCostComparison compare_path_costs_fuzzily ( Path path1,
Path path2,
double  fuzz_factor 
)
static

Definition at line 166 of file pathnode.c.

References CONSIDER_PATH_STARTUP_COST, COSTS_BETTER1, COSTS_BETTER2, COSTS_DIFFERENT, COSTS_EQUAL, Path::startup_cost, and Path::total_cost.

Referenced by add_path().

167 {
168 #define CONSIDER_PATH_STARTUP_COST(p) \
169  ((p)->param_info == NULL ? (p)->parent->consider_startup : (p)->parent->consider_param_startup)
170 
171  /*
172  * Check total cost first since it's more likely to be different; many
173  * paths have zero startup cost.
174  */
175  if (path1->total_cost > path2->total_cost * fuzz_factor)
176  {
177  /* path1 fuzzily worse on total cost */
178  if (CONSIDER_PATH_STARTUP_COST(path1) &&
179  path2->startup_cost > path1->startup_cost * fuzz_factor)
180  {
181  /* ... but path2 fuzzily worse on startup, so DIFFERENT */
182  return COSTS_DIFFERENT;
183  }
184  /* else path2 dominates */
185  return COSTS_BETTER2;
186  }
187  if (path2->total_cost > path1->total_cost * fuzz_factor)
188  {
189  /* path2 fuzzily worse on total cost */
190  if (CONSIDER_PATH_STARTUP_COST(path2) &&
191  path1->startup_cost > path2->startup_cost * fuzz_factor)
192  {
193  /* ... but path1 fuzzily worse on startup, so DIFFERENT */
194  return COSTS_DIFFERENT;
195  }
196  /* else path1 dominates */
197  return COSTS_BETTER1;
198  }
199  /* fuzzily the same on total cost ... */
200  if (path1->startup_cost > path2->startup_cost * fuzz_factor)
201  {
202  /* ... but path1 fuzzily worse on startup, so path2 wins */
203  return COSTS_BETTER2;
204  }
205  if (path2->startup_cost > path1->startup_cost * fuzz_factor)
206  {
207  /* ... but path2 fuzzily worse on startup, so path1 wins */
208  return COSTS_BETTER1;
209  }
210  /* fuzzily the same on both costs */
211  return COSTS_EQUAL;
212 
213 #undef CONSIDER_PATH_STARTUP_COST
214 }
Cost startup_cost
Definition: pathnodes.h:1159
Cost total_cost
Definition: pathnodes.h:1160
#define CONSIDER_PATH_STARTUP_COST(p)

◆ create_agg_path()

AggPath* create_agg_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
PathTarget target,
AggStrategy  aggstrategy,
AggSplit  aggsplit,
List groupClause,
List qual,
const AggClauseCosts aggcosts,
double  numGroups 
)

Definition at line 3002 of file pathnode.c.

References AGG_SORTED, AggPath::aggsplit, AggPath::aggstrategy, RelOptInfo::consider_parallel, PathTarget::cost, cost_agg(), AggPath::groupClause, list_length(), makeNode, NIL, AggPath::numGroups, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, AggPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, QualCost::per_tuple, AggPath::qual, Path::rows, QualCost::startup, Path::startup_cost, subpath(), AggPath::subpath, T_Agg, Path::total_cost, AggClauseCosts::transitionSpace, AggPath::transitionSpace, and PathTarget::width.

Referenced by add_paths_to_grouping_rel(), create_distinct_paths(), create_partial_grouping_paths(), and make_union_unique().

3012 {
3013  AggPath *pathnode = makeNode(AggPath);
3014 
3015  pathnode->path.pathtype = T_Agg;
3016  pathnode->path.parent = rel;
3017  pathnode->path.pathtarget = target;
3018  /* For now, assume we are above any joins, so no parameterization */
3019  pathnode->path.param_info = NULL;
3020  pathnode->path.parallel_aware = false;
3021  pathnode->path.parallel_safe = rel->consider_parallel &&
3022  subpath->parallel_safe;
3023  pathnode->path.parallel_workers = subpath->parallel_workers;
3024  if (aggstrategy == AGG_SORTED)
3025  pathnode->path.pathkeys = subpath->pathkeys; /* preserves order */
3026  else
3027  pathnode->path.pathkeys = NIL; /* output is unordered */
3028  pathnode->subpath = subpath;
3029 
3030  pathnode->aggstrategy = aggstrategy;
3031  pathnode->aggsplit = aggsplit;
3032  pathnode->numGroups = numGroups;
3033  pathnode->transitionSpace = aggcosts ? aggcosts->transitionSpace : 0;
3034  pathnode->groupClause = groupClause;
3035  pathnode->qual = qual;
3036 
3037  cost_agg(&pathnode->path, root,
3038  aggstrategy, aggcosts,
3039  list_length(groupClause), numGroups,
3040  qual,
3041  subpath->startup_cost, subpath->total_cost,
3042  subpath->rows, subpath->pathtarget->width);
3043 
3044  /* add tlist eval cost for each output row */
3045  pathnode->path.startup_cost += target->cost.startup;
3046  pathnode->path.total_cost += target->cost.startup +
3047  target->cost.per_tuple * pathnode->path.rows;
3048 
3049  return pathnode;
3050 }
#define NIL
Definition: pg_list.h:65
Definition: nodes.h:79
PathTarget * pathtarget
Definition: pathnodes.h:1149
AggStrategy aggstrategy
Definition: pathnodes.h:1703
List * qual
Definition: pathnodes.h:1708
void cost_agg(Path *path, PlannerInfo *root, AggStrategy aggstrategy, const AggClauseCosts *aggcosts, int numGroupCols, double numGroups, List *quals, Cost input_startup_cost, Cost input_total_cost, double input_tuples, double input_width)
Definition: costsize.c:2320
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
AggSplit aggsplit
Definition: pathnodes.h:1704
double numGroups
Definition: pathnodes.h:1705
Cost startup
Definition: pathnodes.h:45
NodeTag pathtype
Definition: pathnodes.h:1146
Cost per_tuple
Definition: pathnodes.h:46
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
List * groupClause
Definition: pathnodes.h:1707
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
uint64 transitionSpace
Definition: pathnodes.h:1706
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
static int list_length(const List *l)
Definition: pg_list.h:149
bool consider_parallel
Definition: pathnodes.h:674
Path * subpath
Definition: pathnodes.h:1702
Size transitionSpace
Definition: pathnodes.h:60
bool parallel_aware
Definition: pathnodes.h:1153
Path path
Definition: pathnodes.h:1701
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_append_path()

AppendPath* create_append_path ( PlannerInfo root,
RelOptInfo rel,
List subpaths,
List partial_subpaths,
List pathkeys,
Relids  required_outer,
int  parallel_workers,
bool  parallel_aware,
double  rows 
)

Definition at line 1215 of file pathnode.c.

References PlannerInfo::all_baserels, append_startup_cost_compare(), append_total_cost_compare(), Assert, bms_equal(), RelOptInfo::consider_parallel, cost_append(), AppendPath::first_partial_path, get_appendrel_parampathinfo(), get_baserel_parampathinfo(), IS_PARTITIONED_REL, lfirst, PlannerInfo::limit_tuples, AppendPath::limit_tuples, linitial, list_concat(), list_length(), list_sort(), makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, AppendPath::path, PATH_REQ_OUTER, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::relids, RELOPT_BASEREL, RelOptInfo::reloptkind, RelOptInfo::reltarget, Path::rows, Path::startup_cost, subpath(), AppendPath::subpaths, T_Append, and Path::total_cost.

Referenced by add_paths_to_append_rel(), create_degenerate_grouping_paths(), generate_nonunion_paths(), generate_orderedappend_paths(), generate_union_paths(), inheritance_planner(), mark_dummy_rel(), reparameterize_path(), and set_dummy_rel_pathlist().

1221 {
1222  AppendPath *pathnode = makeNode(AppendPath);
1223  ListCell *l;
1224 
1225  Assert(!parallel_aware || parallel_workers > 0);
1226 
1227  pathnode->path.pathtype = T_Append;
1228  pathnode->path.parent = rel;
1229  pathnode->path.pathtarget = rel->reltarget;
1230 
1231  /*
1232  * When generating an Append path for a partitioned table, there may be
1233  * parameterized quals that are useful for run-time pruning. Hence,
1234  * compute path.param_info the same way as for any other baserel, so that
1235  * such quals will be available for make_partition_pruneinfo(). (This
1236  * would not work right for a non-baserel, ie a scan on a non-leaf child
1237  * partition, and it's not necessary anyway in that case. Must skip it if
1238  * we don't have "root", too.)
1239  */
1240  if (root && rel->reloptkind == RELOPT_BASEREL && IS_PARTITIONED_REL(rel))
1241  pathnode->path.param_info = get_baserel_parampathinfo(root,
1242  rel,
1243  required_outer);
1244  else
1246  required_outer);
1247 
1248  pathnode->path.parallel_aware = parallel_aware;
1249  pathnode->path.parallel_safe = rel->consider_parallel;
1250  pathnode->path.parallel_workers = parallel_workers;
1251  pathnode->path.pathkeys = pathkeys;
1252 
1253  /*
1254  * For parallel append, non-partial paths are sorted by descending total
1255  * costs. That way, the total time to finish all non-partial paths is
1256  * minimized. Also, the partial paths are sorted by descending startup
1257  * costs. There may be some paths that require to do startup work by a
1258  * single worker. In such case, it's better for workers to choose the
1259  * expensive ones first, whereas the leader should choose the cheapest
1260  * startup plan.
1261  */
1262  if (pathnode->path.parallel_aware)
1263  {
1264  /*
1265  * We mustn't fiddle with the order of subpaths when the Append has
1266  * pathkeys. The order they're listed in is critical to keeping the
1267  * pathkeys valid.
1268  */
1269  Assert(pathkeys == NIL);
1270 
1272  list_sort(partial_subpaths, append_startup_cost_compare);
1273  }
1274  pathnode->first_partial_path = list_length(subpaths);
1275  pathnode->subpaths = list_concat(subpaths, partial_subpaths);
1276 
1277  /*
1278  * Apply query-wide LIMIT if known and path is for sole base relation.
1279  * (Handling this at this low level is a bit klugy.)
1280  */
1281  if (root != NULL && bms_equal(rel->relids, root->all_baserels))
1282  pathnode->limit_tuples = root->limit_tuples;
1283  else
1284  pathnode->limit_tuples = -1.0;
1285 
1286  foreach(l, pathnode->subpaths)
1287  {
1288  Path *subpath = (Path *) lfirst(l);
1289 
1290  pathnode->path.parallel_safe = pathnode->path.parallel_safe &&
1291  subpath->parallel_safe;
1292 
1293  /* All child paths must have same parameterization */
1294  Assert(bms_equal(PATH_REQ_OUTER(subpath), required_outer));
1295  }
1296 
1297  Assert(!parallel_aware || pathnode->path.parallel_safe);
1298 
1299  /*
1300  * If there's exactly one child path, the Append is a no-op and will be
1301  * discarded later (in setrefs.c); therefore, we can inherit the child's
1302  * size and cost, as well as its pathkeys if any (overriding whatever the
1303  * caller might've said). Otherwise, we must do the normal costsize
1304  * calculation.
1305  */
1306  if (list_length(pathnode->subpaths) == 1)
1307  {
1308  Path *child = (Path *) linitial(pathnode->subpaths);
1309 
1310  pathnode->path.rows = child->rows;
1311  pathnode->path.startup_cost = child->startup_cost;
1312  pathnode->path.total_cost = child->total_cost;
1313  pathnode->path.pathkeys = child->pathkeys;
1314  }
1315  else
1316  cost_append(pathnode);
1317 
1318  /* If the caller provided a row estimate, override the computed value. */
1319  if (rows >= 0)
1320  pathnode->path.rows = rows;
1321 
1322  return pathnode;
1323 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
RelOptKind reloptkind
Definition: pathnodes.h:663
double limit_tuples
Definition: pathnodes.h:1409
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
List * list_concat(List *list1, const List *list2)
Definition: list.c:530
Definition: nodes.h:49
static int append_total_cost_compare(const ListCell *a, const ListCell *b)
Definition: pathnode.c:1335
int first_partial_path
Definition: pathnodes.h:1408
NodeTag pathtype
Definition: pathnodes.h:1146
List * subpaths
Definition: pathnodes.h:1406
static int append_startup_cost_compare(const ListCell *a, const ListCell *b)
Definition: pathnode.c:1357
#define linitial(l)
Definition: pg_list.h:174
Relids all_baserels
Definition: pathnodes.h:221
double limit_tuples
Definition: pathnodes.h:331
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
Relids relids
Definition: pathnodes.h:666
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
#define lfirst(lc)
Definition: pg_list.h:169
void cost_append(AppendPath *apath)
Definition: costsize.c:2044
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
static int list_length(const List *l)
Definition: pg_list.h:149
bool consider_parallel
Definition: pathnodes.h:674
void list_sort(List *list, list_sort_comparator cmp)
Definition: list.c:1496
#define IS_PARTITIONED_REL(rel)
Definition: pathnodes.h:766
bool parallel_aware
Definition: pathnodes.h:1153
ParamPathInfo * get_appendrel_parampathinfo(RelOptInfo *appendrel, Relids required_outer)
Definition: relnode.c:1572
struct PathTarget * reltarget
Definition: pathnodes.h:677
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241
bool bms_equal(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:94

◆ create_bitmap_and_path()

BitmapAndPath* create_bitmap_and_path ( PlannerInfo root,
RelOptInfo rel,
List bitmapquals 
)

Definition at line 1079 of file pathnode.c.

References BitmapAndPath::bitmapquals, bms_add_members(), RelOptInfo::consider_parallel, cost_bitmap_and_node(), get_baserel_parampathinfo(), lfirst, makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, BitmapAndPath::path, PATH_REQ_OUTER, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, and T_BitmapAnd.

Referenced by bitmap_and_cost_est(), and choose_bitmap_and().

1082 {
1083  BitmapAndPath *pathnode = makeNode(BitmapAndPath);
1084  Relids required_outer = NULL;
1085  ListCell *lc;
1086 
1087  pathnode->path.pathtype = T_BitmapAnd;
1088  pathnode->path.parent = rel;
1089  pathnode->path.pathtarget = rel->reltarget;
1090 
1091  /*
1092  * Identify the required outer rels as the union of what the child paths
1093  * depend on. (Alternatively, we could insist that the caller pass this
1094  * in, but it's more convenient and reliable to compute it here.)
1095  */
1096  foreach(lc, bitmapquals)
1097  {
1098  Path *bitmapqual = (Path *) lfirst(lc);
1099 
1100  required_outer = bms_add_members(required_outer,
1101  PATH_REQ_OUTER(bitmapqual));
1102  }
1103  pathnode->path.param_info = get_baserel_parampathinfo(root, rel,
1104  required_outer);
1105 
1106  /*
1107  * Currently, a BitmapHeapPath, BitmapAndPath, or BitmapOrPath will be
1108  * parallel-safe if and only if rel->consider_parallel is set. So, we can
1109  * set the flag for this path based only on the relation-level flag,
1110  * without actually iterating over the list of children.
1111  */
1112  pathnode->path.parallel_aware = false;
1113  pathnode->path.parallel_safe = rel->consider_parallel;
1114  pathnode->path.parallel_workers = 0;
1115 
1116  pathnode->path.pathkeys = NIL; /* always unordered */
1117 
1118  pathnode->bitmapquals = bitmapquals;
1119 
1120  /* this sets bitmapselectivity as well as the regular cost fields: */
1121  cost_bitmap_and_node(pathnode, root);
1122 
1123  return pathnode;
1124 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
void cost_bitmap_and_node(BitmapAndPath *path, PlannerInfo *root)
Definition: costsize.c:1096
ParamPathInfo * param_info
Definition: pathnodes.h:1151
List * bitmapquals
Definition: pathnodes.h:1296
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define lfirst(lc)
Definition: pg_list.h:169
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677
Bitmapset * bms_add_members(Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:793

◆ create_bitmap_heap_path()

BitmapHeapPath* create_bitmap_heap_path ( PlannerInfo root,
RelOptInfo rel,
Path bitmapqual,
Relids  required_outer,
double  loop_count,
int  parallel_degree 
)

Definition at line 1046 of file pathnode.c.

References BitmapHeapPath::bitmapqual, RelOptInfo::consider_parallel, cost_bitmap_heap_scan(), get_baserel_parampathinfo(), makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, BitmapHeapPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, T_BitmapHeapScan, and true.

Referenced by create_index_paths(), create_partial_bitmap_paths(), and reparameterize_path().

1052 {
1053  BitmapHeapPath *pathnode = makeNode(BitmapHeapPath);
1054 
1055  pathnode->path.pathtype = T_BitmapHeapScan;
1056  pathnode->path.parent = rel;
1057  pathnode->path.pathtarget = rel->reltarget;
1058  pathnode->path.param_info = get_baserel_parampathinfo(root, rel,
1059  required_outer);
1060  pathnode->path.parallel_aware = parallel_degree > 0 ? true : false;
1061  pathnode->path.parallel_safe = rel->consider_parallel;
1062  pathnode->path.parallel_workers = parallel_degree;
1063  pathnode->path.pathkeys = NIL; /* always unordered */
1064 
1065  pathnode->bitmapqual = bitmapqual;
1066 
1067  cost_bitmap_heap_scan(&pathnode->path, root, rel,
1068  pathnode->path.param_info,
1069  bitmapqual, loop_count);
1070 
1071  return pathnode;
1072 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
void cost_bitmap_heap_scan(Path *path, PlannerInfo *root, RelOptInfo *baserel, ParamPathInfo *param_info, Path *bitmapqual, double loop_count)
Definition: costsize.c:952
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
#define true
Definition: c.h:395
RelOptInfo * parent
Definition: pathnodes.h:1148
Path * bitmapqual
Definition: pathnodes.h:1284
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_bitmap_or_path()

BitmapOrPath* create_bitmap_or_path ( PlannerInfo root,
RelOptInfo rel,
List bitmapquals 
)

Definition at line 1131 of file pathnode.c.

References BitmapOrPath::bitmapquals, bms_add_members(), RelOptInfo::consider_parallel, cost_bitmap_or_node(), get_baserel_parampathinfo(), lfirst, makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, BitmapOrPath::path, PATH_REQ_OUTER, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, and T_BitmapOr.

Referenced by generate_bitmap_or_paths().

1134 {
1135  BitmapOrPath *pathnode = makeNode(BitmapOrPath);
1136  Relids required_outer = NULL;
1137  ListCell *lc;
1138 
1139  pathnode->path.pathtype = T_BitmapOr;
1140  pathnode->path.parent = rel;
1141  pathnode->path.pathtarget = rel->reltarget;
1142 
1143  /*
1144  * Identify the required outer rels as the union of what the child paths
1145  * depend on. (Alternatively, we could insist that the caller pass this
1146  * in, but it's more convenient and reliable to compute it here.)
1147  */
1148  foreach(lc, bitmapquals)
1149  {
1150  Path *bitmapqual = (Path *) lfirst(lc);
1151 
1152  required_outer = bms_add_members(required_outer,
1153  PATH_REQ_OUTER(bitmapqual));
1154  }
1155  pathnode->path.param_info = get_baserel_parampathinfo(root, rel,
1156  required_outer);
1157 
1158  /*
1159  * Currently, a BitmapHeapPath, BitmapAndPath, or BitmapOrPath will be
1160  * parallel-safe if and only if rel->consider_parallel is set. So, we can
1161  * set the flag for this path based only on the relation-level flag,
1162  * without actually iterating over the list of children.
1163  */
1164  pathnode->path.parallel_aware = false;
1165  pathnode->path.parallel_safe = rel->consider_parallel;
1166  pathnode->path.parallel_workers = 0;
1167 
1168  pathnode->path.pathkeys = NIL; /* always unordered */
1169 
1170  pathnode->bitmapquals = bitmapquals;
1171 
1172  /* this sets bitmapselectivity as well as the regular cost fields: */
1173  cost_bitmap_or_node(pathnode, root);
1174 
1175  return pathnode;
1176 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
List * bitmapquals
Definition: pathnodes.h:1309
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define lfirst(lc)
Definition: pg_list.h:169
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
void cost_bitmap_or_node(BitmapOrPath *path, PlannerInfo *root)
Definition: costsize.c:1140
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677
Bitmapset * bms_add_members(Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:793

◆ create_ctescan_path()

Path* create_ctescan_path ( PlannerInfo root,
RelOptInfo rel,
Relids  required_outer 
)

Definition at line 2019 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_ctescan(), get_baserel_parampathinfo(), makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, and T_CteScan.

Referenced by set_cte_pathlist().

2020 {
2021  Path *pathnode = makeNode(Path);
2022 
2023  pathnode->pathtype = T_CteScan;
2024  pathnode->parent = rel;
2025  pathnode->pathtarget = rel->reltarget;
2026  pathnode->param_info = get_baserel_parampathinfo(root, rel,
2027  required_outer);
2028  pathnode->parallel_aware = false;
2029  pathnode->parallel_safe = rel->consider_parallel;
2030  pathnode->parallel_workers = 0;
2031  pathnode->pathkeys = NIL; /* XXX for now, result is always unordered */
2032 
2033  cost_ctescan(pathnode, root, rel, pathnode->param_info);
2034 
2035  return pathnode;
2036 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
void cost_ctescan(Path *path, PlannerInfo *root, RelOptInfo *baserel, ParamPathInfo *param_info)
Definition: costsize.c:1510
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_foreign_join_path()

ForeignPath* create_foreign_join_path ( PlannerInfo root,
RelOptInfo rel,
PathTarget target,
double  rows,
Cost  startup_cost,
Cost  total_cost,
List pathkeys,
Relids  required_outer,
Path fdw_outerpath,
List fdw_private 
)

Definition at line 2173 of file pathnode.c.

References bms_is_empty(), RelOptInfo::consider_parallel, elog, ERROR, ForeignPath::fdw_outerpath, ForeignPath::fdw_private, RelOptInfo::lateral_relids, makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, ForeignPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, Path::rows, Path::startup_cost, T_ForeignScan, and Path::total_cost.

Referenced by add_paths_with_pathkeys_for_rel(), and postgresGetForeignJoinPaths().

2180 {
2181  ForeignPath *pathnode = makeNode(ForeignPath);
2182 
2183  /*
2184  * We should use get_joinrel_parampathinfo to handle parameterized paths,
2185  * but the API of this function doesn't support it, and existing
2186  * extensions aren't yet trying to build such paths anyway. For the
2187  * moment just throw an error if someone tries it; eventually we should
2188  * revisit this.
2189  */
2190  if (!bms_is_empty(required_outer) || !bms_is_empty(rel->lateral_relids))
2191  elog(ERROR, "parameterized foreign joins are not supported yet");
2192 
2193  pathnode->path.pathtype = T_ForeignScan;
2194  pathnode->path.parent = rel;
2195  pathnode->path.pathtarget = target ? target : rel->reltarget;
2196  pathnode->path.param_info = NULL; /* XXX see above */
2197  pathnode->path.parallel_aware = false;
2198  pathnode->path.parallel_safe = rel->consider_parallel;
2199  pathnode->path.parallel_workers = 0;
2200  pathnode->path.rows = rows;
2201  pathnode->path.startup_cost = startup_cost;
2202  pathnode->path.total_cost = total_cost;
2203  pathnode->path.pathkeys = pathkeys;
2204 
2205  pathnode->fdw_outerpath = fdw_outerpath;
2206  pathnode->fdw_private = fdw_private;
2207 
2208  return pathnode;
2209 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
Path * fdw_outerpath
Definition: pathnodes.h:1353
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
Relids lateral_relids
Definition: pathnodes.h:691
#define ERROR
Definition: elog.h:45
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
bool bms_is_empty(const Bitmapset *a)
Definition: bitmapset.c:701
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
List * fdw_private
Definition: pathnodes.h:1354
#define elog(elevel,...)
Definition: elog.h:228
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_foreign_upper_path()

ForeignPath* create_foreign_upper_path ( PlannerInfo root,
RelOptInfo rel,
PathTarget target,
double  rows,
Cost  startup_cost,
Cost  total_cost,
List pathkeys,
Path fdw_outerpath,
List fdw_private 
)

Definition at line 2223 of file pathnode.c.

References Assert, bms_is_empty(), RelOptInfo::consider_parallel, ForeignPath::fdw_outerpath, ForeignPath::fdw_private, RelOptInfo::lateral_relids, makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, ForeignPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, Path::rows, Path::startup_cost, T_ForeignScan, and Path::total_cost.

Referenced by add_foreign_final_paths(), add_foreign_grouping_paths(), and add_foreign_ordered_paths().

2229 {
2230  ForeignPath *pathnode = makeNode(ForeignPath);
2231 
2232  /*
2233  * Upper relations should never have any lateral references, since joining
2234  * is complete.
2235  */
2237 
2238  pathnode->path.pathtype = T_ForeignScan;
2239  pathnode->path.parent = rel;
2240  pathnode->path.pathtarget = target ? target : rel->reltarget;
2241  pathnode->path.param_info = NULL;
2242  pathnode->path.parallel_aware = false;
2243  pathnode->path.parallel_safe = rel->consider_parallel;
2244  pathnode->path.parallel_workers = 0;
2245  pathnode->path.rows = rows;
2246  pathnode->path.startup_cost = startup_cost;
2247  pathnode->path.total_cost = total_cost;
2248  pathnode->path.pathkeys = pathkeys;
2249 
2250  pathnode->fdw_outerpath = fdw_outerpath;
2251  pathnode->fdw_private = fdw_private;
2252 
2253  return pathnode;
2254 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
Path * fdw_outerpath
Definition: pathnodes.h:1353
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
Relids lateral_relids
Definition: pathnodes.h:691
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
bool bms_is_empty(const Bitmapset *a)
Definition: bitmapset.c:701
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
List * fdw_private
Definition: pathnodes.h:1354
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_foreignscan_path()

ForeignPath* create_foreignscan_path ( PlannerInfo root,
RelOptInfo rel,
PathTarget target,
double  rows,
Cost  startup_cost,
Cost  total_cost,
List pathkeys,
Relids  required_outer,
Path fdw_outerpath,
List fdw_private 
)

Definition at line 2129 of file pathnode.c.

References Assert, RelOptInfo::consider_parallel, ForeignPath::fdw_outerpath, ForeignPath::fdw_private, get_baserel_parampathinfo(), IS_SIMPLE_REL, makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, ForeignPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, Path::rows, Path::startup_cost, T_ForeignScan, and Path::total_cost.

Referenced by add_paths_with_pathkeys_for_rel(), fileGetForeignPaths(), and postgresGetForeignPaths().

2136 {
2137  ForeignPath *pathnode = makeNode(ForeignPath);
2138 
2139  /* Historically some FDWs were confused about when to use this */
2140  Assert(IS_SIMPLE_REL(rel));
2141 
2142  pathnode->path.pathtype = T_ForeignScan;
2143  pathnode->path.parent = rel;
2144  pathnode->path.pathtarget = target ? target : rel->reltarget;
2145  pathnode->path.param_info = get_baserel_parampathinfo(root, rel,
2146  required_outer);
2147  pathnode->path.parallel_aware = false;
2148  pathnode->path.parallel_safe = rel->consider_parallel;
2149  pathnode->path.parallel_workers = 0;
2150  pathnode->path.rows = rows;
2151  pathnode->path.startup_cost = startup_cost;
2152  pathnode->path.total_cost = total_cost;
2153  pathnode->path.pathkeys = pathkeys;
2154 
2155  pathnode->fdw_outerpath = fdw_outerpath;
2156  pathnode->fdw_private = fdw_private;
2157 
2158  return pathnode;
2159 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
Path * fdw_outerpath
Definition: pathnodes.h:1353
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
#define IS_SIMPLE_REL(rel)
Definition: pathnodes.h:639
NodeTag pathtype
Definition: pathnodes.h:1146
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
List * fdw_private
Definition: pathnodes.h:1354
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_functionscan_path()

Path* create_functionscan_path ( PlannerInfo root,
RelOptInfo rel,
List pathkeys,
Relids  required_outer 
)

Definition at line 1941 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_functionscan(), get_baserel_parampathinfo(), makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, and T_FunctionScan.

Referenced by set_function_pathlist().

1943 {
1944  Path *pathnode = makeNode(Path);
1945 
1946  pathnode->pathtype = T_FunctionScan;
1947  pathnode->parent = rel;
1948  pathnode->pathtarget = rel->reltarget;
1949  pathnode->param_info = get_baserel_parampathinfo(root, rel,
1950  required_outer);
1951  pathnode->parallel_aware = false;
1952  pathnode->parallel_safe = rel->consider_parallel;
1953  pathnode->parallel_workers = 0;
1954  pathnode->pathkeys = pathkeys;
1955 
1956  cost_functionscan(pathnode, root, rel, pathnode->param_info);
1957 
1958  return pathnode;
1959 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
void cost_functionscan(Path *path, PlannerInfo *root, RelOptInfo *baserel, ParamPathInfo *param_info)
Definition: costsize.c:1343
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_gather_merge_path()

GatherMergePath* create_gather_merge_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
PathTarget target,
List pathkeys,
Relids  required_outer,
double *  rows 
)

Definition at line 1783 of file pathnode.c.

References Assert, cost_gather_merge(), cost_sort(), get_baserel_parampathinfo(), makeNode, GatherMergePath::num_workers, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, GatherMergePath::path, Path::pathkeys, pathkeys_contained_in(), Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, Path::rows, Path::startup_cost, subpath(), GatherMergePath::subpath, T_GatherMerge, Path::total_cost, PathTarget::width, and work_mem.

Referenced by create_ordered_paths(), gather_grouping_paths(), generate_gather_paths(), and generate_useful_gather_paths().

1786 {
1788  Cost input_startup_cost = 0;
1789  Cost input_total_cost = 0;
1790 
1791  Assert(subpath->parallel_safe);
1792  Assert(pathkeys);
1793 
1794  pathnode->path.pathtype = T_GatherMerge;
1795  pathnode->path.parent = rel;
1796  pathnode->path.param_info = get_baserel_parampathinfo(root, rel,
1797  required_outer);
1798  pathnode->path.parallel_aware = false;
1799 
1800  pathnode->subpath = subpath;
1801  pathnode->num_workers = subpath->parallel_workers;
1802  pathnode->path.pathkeys = pathkeys;
1803  pathnode->path.pathtarget = target ? target : rel->reltarget;
1804  pathnode->path.rows += subpath->rows;
1805 
1806  if (pathkeys_contained_in(pathkeys, subpath->pathkeys))
1807  {
1808  /* Subpath is adequately ordered, we won't need to sort it */
1809  input_startup_cost += subpath->startup_cost;
1810  input_total_cost += subpath->total_cost;
1811  }
1812  else
1813  {
1814  /* We'll need to insert a Sort node, so include cost for that */
1815  Path sort_path; /* dummy for result of cost_sort */
1816 
1817  cost_sort(&sort_path,
1818  root,
1819  pathkeys,
1820  subpath->total_cost,
1821  subpath->rows,
1822  subpath->pathtarget->width,
1823  0.0,
1824  work_mem,
1825  -1);
1826  input_startup_cost += sort_path.startup_cost;
1827  input_total_cost += sort_path.total_cost;
1828  }
1829 
1830  cost_gather_merge(pathnode, root, rel, pathnode->path.param_info,
1831  input_startup_cost, input_total_cost, rows);
1832 
1833  return pathnode;
1834 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
void cost_gather_merge(GatherMergePath *path, PlannerInfo *root, RelOptInfo *rel, ParamPathInfo *param_info, Cost input_startup_cost, Cost input_total_cost, double *rows)
Definition: costsize.c:413
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
bool pathkeys_contained_in(List *keys1, List *keys2)
Definition: pathkeys.c:324
void cost_sort(Path *path, PlannerInfo *root, List *pathkeys, Cost input_cost, double tuples, int width, Cost comparison_cost, int sort_mem, double limit_tuples)
Definition: costsize.c:1937
int work_mem
Definition: globals.c:122
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677
double Cost
Definition: nodes.h:664
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_gather_path()

GatherPath* create_gather_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
PathTarget target,
Relids  required_outer,
double *  rows 
)

Definition at line 1874 of file pathnode.c.

References Assert, cost_gather(), get_baserel_parampathinfo(), makeNode, NIL, GatherPath::num_workers, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, GatherPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, GatherPath::single_copy, subpath(), GatherPath::subpath, and T_Gather.

Referenced by generate_gather_paths(), and generate_union_paths().

1876 {
1877  GatherPath *pathnode = makeNode(GatherPath);
1878 
1879  Assert(subpath->parallel_safe);
1880 
1881  pathnode->path.pathtype = T_Gather;
1882  pathnode->path.parent = rel;
1883  pathnode->path.pathtarget = target;
1884  pathnode->path.param_info = get_baserel_parampathinfo(root, rel,
1885  required_outer);
1886  pathnode->path.parallel_aware = false;
1887  pathnode->path.parallel_safe = false;
1888  pathnode->path.parallel_workers = 0;
1889  pathnode->path.pathkeys = NIL; /* Gather has unordered result */
1890 
1891  pathnode->subpath = subpath;
1892  pathnode->num_workers = subpath->parallel_workers;
1893  pathnode->single_copy = false;
1894 
1895  if (pathnode->num_workers == 0)
1896  {
1897  pathnode->path.pathkeys = subpath->pathkeys;
1898  pathnode->num_workers = 1;
1899  pathnode->single_copy = true;
1900  }
1901 
1902  cost_gather(pathnode, root, rel, pathnode->path.param_info, rows);
1903 
1904  return pathnode;
1905 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
bool single_copy
Definition: pathnodes.h:1496
int num_workers
Definition: pathnodes.h:1497
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
Path * subpath
Definition: pathnodes.h:1495
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
bool parallel_safe
Definition: pathnodes.h:1154
void cost_gather(GatherPath *path, PlannerInfo *root, RelOptInfo *rel, ParamPathInfo *param_info, double *rows)
Definition: costsize.c:375
Definition: nodes.h:82
bool parallel_aware
Definition: pathnodes.h:1153
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_group_path()

GroupPath* create_group_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
List groupClause,
List qual,
double  numGroups 
)

Definition at line 2891 of file pathnode.c.

References RelOptInfo::consider_parallel, PathTarget::cost, cost_group(), GroupPath::groupClause, list_length(), makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, GroupPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, QualCost::per_tuple, GroupPath::qual, RelOptInfo::reltarget, Path::rows, QualCost::startup, Path::startup_cost, subpath(), GroupPath::subpath, T_Group, and Path::total_cost.

Referenced by add_paths_to_grouping_rel(), and create_partial_grouping_paths().

2897 {
2898  GroupPath *pathnode = makeNode(GroupPath);
2899  PathTarget *target = rel->reltarget;
2900 
2901  pathnode->path.pathtype = T_Group;
2902  pathnode->path.parent = rel;
2903  pathnode->path.pathtarget = target;
2904  /* For now, assume we are above any joins, so no parameterization */
2905  pathnode->path.param_info = NULL;
2906  pathnode->path.parallel_aware = false;
2907  pathnode->path.parallel_safe = rel->consider_parallel &&
2908  subpath->parallel_safe;
2909  pathnode->path.parallel_workers = subpath->parallel_workers;
2910  /* Group doesn't change sort ordering */
2911  pathnode->path.pathkeys = subpath->pathkeys;
2912 
2913  pathnode->subpath = subpath;
2914 
2915  pathnode->groupClause = groupClause;
2916  pathnode->qual = qual;
2917 
2918  cost_group(&pathnode->path, root,
2919  list_length(groupClause),
2920  numGroups,
2921  qual,
2922  subpath->startup_cost, subpath->total_cost,
2923  subpath->rows);
2924 
2925  /* add tlist eval cost for each output row */
2926  pathnode->path.startup_cost += target->cost.startup;
2927  pathnode->path.total_cost += target->cost.startup +
2928  target->cost.per_tuple * pathnode->path.rows;
2929 
2930  return pathnode;
2931 }
List * qual
Definition: pathnodes.h:1676
PathTarget * pathtarget
Definition: pathnodes.h:1149
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
Cost startup
Definition: pathnodes.h:45
NodeTag pathtype
Definition: pathnodes.h:1146
Cost per_tuple
Definition: pathnodes.h:46
Cost startup_cost
Definition: pathnodes.h:1159
void cost_group(Path *path, PlannerInfo *root, int numGroupCols, double numGroups, List *quals, Cost input_startup_cost, Cost input_total_cost, double input_tuples)
Definition: costsize.c:2592
RelOptInfo * parent
Definition: pathnodes.h:1148
Definition: nodes.h:78
Path path
Definition: pathnodes.h:1673
List * groupClause
Definition: pathnodes.h:1675
Path * subpath
Definition: pathnodes.h:1674
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
static int list_length(const List *l)
Definition: pg_list.h:149
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_group_result_path()

GroupResultPath* create_group_result_path ( PlannerInfo root,
RelOptInfo rel,
PathTarget target,
List havingqual 
)

Definition at line 1475 of file pathnode.c.

References RelOptInfo::consider_parallel, PathTarget::cost, cost_qual_eval(), cpu_tuple_cost, makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, GroupResultPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, QualCost::per_tuple, GroupResultPath::quals, Path::rows, QualCost::startup, Path::startup_cost, T_Result, and Path::total_cost.

Referenced by create_degenerate_grouping_paths(), and query_planner().

1477 {
1479 
1480  pathnode->path.pathtype = T_Result;
1481  pathnode->path.parent = rel;
1482  pathnode->path.pathtarget = target;
1483  pathnode->path.param_info = NULL; /* there are no other rels... */
1484  pathnode->path.parallel_aware = false;
1485  pathnode->path.parallel_safe = rel->consider_parallel;
1486  pathnode->path.parallel_workers = 0;
1487  pathnode->path.pathkeys = NIL;
1488  pathnode->quals = havingqual;
1489 
1490  /*
1491  * We can't quite use cost_resultscan() because the quals we want to
1492  * account for are not baserestrict quals of the rel. Might as well just
1493  * hack it here.
1494  */
1495  pathnode->path.rows = 1;
1496  pathnode->path.startup_cost = target->cost.startup;
1497  pathnode->path.total_cost = target->cost.startup +
1498  cpu_tuple_cost + target->cost.per_tuple;
1499 
1500  /*
1501  * Add cost of qual, if any --- but we ignore its selectivity, since our
1502  * rowcount estimate should be 1 no matter what the qual is.
1503  */
1504  if (havingqual)
1505  {
1506  QualCost qual_cost;
1507 
1508  cost_qual_eval(&qual_cost, havingqual, root);
1509  /* havingqual is evaluated once at startup */
1510  pathnode->path.startup_cost += qual_cost.startup + qual_cost.per_tuple;
1511  pathnode->path.total_cost += qual_cost.startup + qual_cost.per_tuple;
1512  }
1513 
1514  return pathnode;
1515 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
Cost startup
Definition: pathnodes.h:45
NodeTag pathtype
Definition: pathnodes.h:1146
Cost per_tuple
Definition: pathnodes.h:46
Definition: nodes.h:46
void cost_qual_eval(QualCost *cost, List *quals, PlannerInfo *root)
Definition: costsize.c:4066
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
bool consider_parallel
Definition: pathnodes.h:674
double cpu_tuple_cost
Definition: costsize.c:120
bool parallel_aware
Definition: pathnodes.h:1153

◆ create_groupingsets_path()

GroupingSetsPath* create_groupingsets_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
List having_qual,
AggStrategy  aggstrategy,
List rollups,
const AggClauseCosts agg_costs,
double  numGroups 
)

Definition at line 3069 of file pathnode.c.

References AGG_HASHED, AGG_MIXED, AGG_PLAIN, AGG_SORTED, GroupingSetsPath::aggstrategy, Assert, RelOptInfo::consider_parallel, PathTarget::cost, cost_agg(), cost_sort(), PlannerInfo::group_pathkeys, RollupData::gsets, RollupData::is_hashed, lfirst, linitial, list_length(), makeNode, NIL, RollupData::numGroups, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, GroupingSetsPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, QualCost::per_tuple, GroupingSetsPath::qual, RelOptInfo::reltarget, GroupingSetsPath::rollups, Path::rows, QualCost::startup, Path::startup_cost, subpath(), GroupingSetsPath::subpath, T_Agg, Path::total_cost, AggClauseCosts::transitionSpace, GroupingSetsPath::transitionSpace, PathTarget::width, and work_mem.

Referenced by consider_groupingsets_paths().

3077 {
3079  PathTarget *target = rel->reltarget;
3080  ListCell *lc;
3081  bool is_first = true;
3082  bool is_first_sort = true;
3083 
3084  /* The topmost generated Plan node will be an Agg */
3085  pathnode->path.pathtype = T_Agg;
3086  pathnode->path.parent = rel;
3087  pathnode->path.pathtarget = target;
3088  pathnode->path.param_info = subpath->param_info;
3089  pathnode->path.parallel_aware = false;
3090  pathnode->path.parallel_safe = rel->consider_parallel &&
3091  subpath->parallel_safe;
3092  pathnode->path.parallel_workers = subpath->parallel_workers;
3093  pathnode->subpath = subpath;
3094 
3095  /*
3096  * Simplify callers by downgrading AGG_SORTED to AGG_PLAIN, and AGG_MIXED
3097  * to AGG_HASHED, here if possible.
3098  */
3099  if (aggstrategy == AGG_SORTED &&
3100  list_length(rollups) == 1 &&
3101  ((RollupData *) linitial(rollups))->groupClause == NIL)
3102  aggstrategy = AGG_PLAIN;
3103 
3104  if (aggstrategy == AGG_MIXED &&
3105  list_length(rollups) == 1)
3106  aggstrategy = AGG_HASHED;
3107 
3108  /*
3109  * Output will be in sorted order by group_pathkeys if, and only if, there
3110  * is a single rollup operation on a non-empty list of grouping
3111  * expressions.
3112  */
3113  if (aggstrategy == AGG_SORTED && list_length(rollups) == 1)
3114  pathnode->path.pathkeys = root->group_pathkeys;
3115  else
3116  pathnode->path.pathkeys = NIL;
3117 
3118  pathnode->aggstrategy = aggstrategy;
3119  pathnode->rollups = rollups;
3120  pathnode->qual = having_qual;
3121  pathnode->transitionSpace = agg_costs ? agg_costs->transitionSpace : 0;
3122 
3123  Assert(rollups != NIL);
3124  Assert(aggstrategy != AGG_PLAIN || list_length(rollups) == 1);
3125  Assert(aggstrategy != AGG_MIXED || list_length(rollups) > 1);
3126 
3127  foreach(lc, rollups)
3128  {
3129  RollupData *rollup = lfirst(lc);
3130  List *gsets = rollup->gsets;
3131  int numGroupCols = list_length(linitial(gsets));
3132 
3133  /*
3134  * In AGG_SORTED or AGG_PLAIN mode, the first rollup takes the
3135  * (already-sorted) input, and following ones do their own sort.
3136  *
3137  * In AGG_HASHED mode, there is one rollup for each grouping set.
3138  *
3139  * In AGG_MIXED mode, the first rollups are hashed, the first
3140  * non-hashed one takes the (already-sorted) input, and following ones
3141  * do their own sort.
3142  */
3143  if (is_first)
3144  {
3145  cost_agg(&pathnode->path, root,
3146  aggstrategy,
3147  agg_costs,
3148  numGroupCols,
3149  rollup->numGroups,
3150  having_qual,
3151  subpath->startup_cost,
3152  subpath->total_cost,
3153  subpath->rows,
3154  subpath->pathtarget->width);
3155  is_first = false;
3156  if (!rollup->is_hashed)
3157  is_first_sort = false;
3158  }
3159  else
3160  {
3161  Path sort_path; /* dummy for result of cost_sort */
3162  Path agg_path; /* dummy for result of cost_agg */
3163 
3164  if (rollup->is_hashed || is_first_sort)
3165  {
3166  /*
3167  * Account for cost of aggregation, but don't charge input
3168  * cost again
3169  */
3170  cost_agg(&agg_path, root,
3171  rollup->is_hashed ? AGG_HASHED : AGG_SORTED,
3172  agg_costs,
3173  numGroupCols,
3174  rollup->numGroups,
3175  having_qual,
3176  0.0, 0.0,
3177  subpath->rows,
3178  subpath->pathtarget->width);
3179  if (!rollup->is_hashed)
3180  is_first_sort = false;
3181  }
3182  else
3183  {
3184  /* Account for cost of sort, but don't charge input cost again */
3185  cost_sort(&sort_path, root, NIL,
3186  0.0,
3187  subpath->rows,
3188  subpath->pathtarget->width,
3189  0.0,
3190  work_mem,
3191  -1.0);
3192 
3193  /* Account for cost of aggregation */
3194 
3195  cost_agg(&agg_path, root,
3196  AGG_SORTED,
3197  agg_costs,
3198  numGroupCols,
3199  rollup->numGroups,
3200  having_qual,
3201  sort_path.startup_cost,
3202  sort_path.total_cost,
3203  sort_path.rows,
3204  subpath->pathtarget->width);
3205  }
3206 
3207  pathnode->path.total_cost += agg_path.total_cost;
3208  pathnode->path.rows += agg_path.rows;
3209  }
3210  }
3211 
3212  /* add tlist eval cost for each output row */
3213  pathnode->path.startup_cost += target->cost.startup;
3214  pathnode->path.total_cost += target->cost.startup +
3215  target->cost.per_tuple * pathnode->path.rows;
3216 
3217  return pathnode;
3218 }
List * group_pathkeys
Definition: pathnodes.h:294
#define NIL
Definition: pg_list.h:65
Definition: nodes.h:79
PathTarget * pathtarget
Definition: pathnodes.h:1149
void cost_agg(Path *path, PlannerInfo *root, AggStrategy aggstrategy, const AggClauseCosts *aggcosts, int numGroupCols, double numGroups, List *quals, Cost input_startup_cost, Cost input_total_cost, double input_tuples, double input_width)
Definition: costsize.c:2320
int parallel_workers
Definition: pathnodes.h:1155
bool is_hashed
Definition: pathnodes.h:1730
ParamPathInfo * param_info
Definition: pathnodes.h:1151
double numGroups
Definition: pathnodes.h:1728
Cost startup
Definition: pathnodes.h:45
uint64 transitionSpace
Definition: pathnodes.h:1744
NodeTag pathtype
Definition: pathnodes.h:1146
Cost per_tuple
Definition: pathnodes.h:46
#define linitial(l)
Definition: pg_list.h:174
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
AggStrategy aggstrategy
Definition: pathnodes.h:1741
void cost_sort(Path *path, PlannerInfo *root, List *pathkeys, Cost input_cost, double tuples, int width, Cost comparison_cost, int sort_mem, double limit_tuples)
Definition: costsize.c:1937
int work_mem
Definition: globals.c:122
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
#define lfirst(lc)
Definition: pg_list.h:169
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
static int list_length(const List *l)
Definition: pg_list.h:149
bool consider_parallel
Definition: pathnodes.h:674
Size transitionSpace
Definition: pathnodes.h:60
bool parallel_aware
Definition: pathnodes.h:1153
Definition: pg_list.h:50
struct PathTarget * reltarget
Definition: pathnodes.h:677
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241
List * gsets
Definition: pathnodes.h:1726

◆ create_hashjoin_path()

HashPath* create_hashjoin_path ( PlannerInfo root,
RelOptInfo joinrel,
JoinType  jointype,
JoinCostWorkspace workspace,
JoinPathExtraData extra,
Path outer_path,
Path inner_path,
bool  parallel_hash,
List restrict_clauses,
Relids  required_outer,
List hashclauses 
)

Definition at line 2483 of file pathnode.c.

References RelOptInfo::consider_parallel, final_cost_hashjoin(), get_joinrel_parampathinfo(), JoinPath::inner_unique, JoinPathExtraData::inner_unique, JoinPath::innerjoinpath, JoinPath::joinrestrictinfo, JoinPath::jointype, HashPath::jpath, makeNode, NIL, JoinPath::outerjoinpath, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, JoinPath::path, HashPath::path_hashclauses, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, JoinPathExtraData::sjinfo, and T_HashJoin.

Referenced by try_hashjoin_path(), and try_partial_hashjoin_path().

2494 {
2495  HashPath *pathnode = makeNode(HashPath);
2496 
2497  pathnode->jpath.path.pathtype = T_HashJoin;
2498  pathnode->jpath.path.parent = joinrel;
2499  pathnode->jpath.path.pathtarget = joinrel->reltarget;
2500  pathnode->jpath.path.param_info =
2502  joinrel,
2503  outer_path,
2504  inner_path,
2505  extra->sjinfo,
2506  required_outer,
2507  &restrict_clauses);
2508  pathnode->jpath.path.parallel_aware =
2509  joinrel->consider_parallel && parallel_hash;
2510  pathnode->jpath.path.parallel_safe = joinrel->consider_parallel &&
2511  outer_path->parallel_safe && inner_path->parallel_safe;
2512  /* This is a foolish way to estimate parallel_workers, but for now... */
2513  pathnode->jpath.path.parallel_workers = outer_path->parallel_workers;
2514 
2515  /*
2516  * A hashjoin never has pathkeys, since its output ordering is
2517  * unpredictable due to possible batching. XXX If the inner relation is
2518  * small enough, we could instruct the executor that it must not batch,
2519  * and then we could assume that the output inherits the outer relation's
2520  * ordering, which might save a sort step. However there is considerable
2521  * downside if our estimate of the inner relation size is badly off. For
2522  * the moment we don't risk it. (Note also that if we wanted to take this
2523  * seriously, joinpath.c would have to consider many more paths for the
2524  * outer rel than it does now.)
2525  */
2526  pathnode->jpath.path.pathkeys = NIL;
2527  pathnode->jpath.jointype = jointype;
2528  pathnode->jpath.inner_unique = extra->inner_unique;
2529  pathnode->jpath.outerjoinpath = outer_path;
2530  pathnode->jpath.innerjoinpath = inner_path;
2531  pathnode->jpath.joinrestrictinfo = restrict_clauses;
2532  pathnode->path_hashclauses = hashclauses;
2533  /* final_cost_hashjoin will fill in pathnode->num_batches */
2534 
2535  final_cost_hashjoin(root, pathnode, workspace, extra);
2536 
2537  return pathnode;
2538 }
#define NIL
Definition: pg_list.h:65
void final_cost_hashjoin(PlannerInfo *root, HashPath *path, JoinCostWorkspace *workspace, JoinPathExtraData *extra)
Definition: costsize.c:3609
JoinPath jpath
Definition: pathnodes.h:1599
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_joinrel_parampathinfo(PlannerInfo *root, RelOptInfo *joinrel, Path *outer_path, Path *inner_path, SpecialJoinInfo *sjinfo, Relids required_outer, List **restrict_clauses)
Definition: relnode.c:1365
Path * innerjoinpath
Definition: pathnodes.h:1526
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
SpecialJoinInfo * sjinfo
Definition: pathnodes.h:2430
List * joinrestrictinfo
Definition: pathnodes.h:1528
RelOptInfo * parent
Definition: pathnodes.h:1148
Path * outerjoinpath
Definition: pathnodes.h:1525
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
Path path
Definition: pathnodes.h:1518
bool parallel_safe
Definition: pathnodes.h:1154
bool inner_unique
Definition: pathnodes.h:1522
bool consider_parallel
Definition: pathnodes.h:674
JoinType jointype
Definition: pathnodes.h:1520
bool parallel_aware
Definition: pathnodes.h:1153
List * path_hashclauses
Definition: pathnodes.h:1600
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_incremental_sort_path()

IncrementalSortPath* create_incremental_sort_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
List pathkeys,
int  presorted_keys,
double  limit_tuples 
)

Definition at line 2798 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_incremental_sort(), makeNode, IncrementalSortPath::nPresortedCols, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, SortPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, Path::rows, sort(), IncrementalSortPath::spath, Path::startup_cost, subpath(), SortPath::subpath, T_IncrementalSort, Path::total_cost, PathTarget::width, and work_mem.

Referenced by add_paths_to_grouping_rel(), create_one_window_path(), create_ordered_paths(), create_partial_grouping_paths(), gather_grouping_paths(), and generate_useful_gather_paths().

2804 {
2806  SortPath *pathnode = &sort->spath;
2807 
2808  pathnode->path.pathtype = T_IncrementalSort;
2809  pathnode->path.parent = rel;
2810  /* Sort doesn't project, so use source path's pathtarget */
2811  pathnode->path.pathtarget = subpath->pathtarget;
2812  /* For now, assume we are above any joins, so no parameterization */
2813  pathnode->path.param_info = NULL;
2814  pathnode->path.parallel_aware = false;
2815  pathnode->path.parallel_safe = rel->consider_parallel &&
2816  subpath->parallel_safe;
2817  pathnode->path.parallel_workers = subpath->parallel_workers;
2818  pathnode->path.pathkeys = pathkeys;
2819 
2820  pathnode->subpath = subpath;
2821 
2822  cost_incremental_sort(&pathnode->path,
2823  root, pathkeys, presorted_keys,
2824  subpath->startup_cost,
2825  subpath->total_cost,
2826  subpath->rows,
2827  subpath->pathtarget->width,
2828  0.0, /* XXX comparison_cost shouldn't be 0? */
2829  work_mem, limit_tuples);
2830 
2831  sort->nPresortedCols = presorted_keys;
2832 
2833  return sort;
2834 }
void cost_incremental_sort(Path *path, PlannerInfo *root, List *pathkeys, int presorted_keys, Cost input_startup_cost, Cost input_total_cost, double input_tuples, int width, Cost comparison_cost, int sort_mem, double limit_tuples)
Definition: costsize.c:1798
PathTarget * pathtarget
Definition: pathnodes.h:1149
Path * subpath
Definition: pathnodes.h:1648
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
Datum sort(PG_FUNCTION_ARGS)
Definition: _int_op.c:195
int work_mem
Definition: globals.c:122
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
Path path
Definition: pathnodes.h:1647
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_index_path()

IndexPath* create_index_path ( PlannerInfo root,
IndexOptInfo index,
List indexclauses,
List indexorderbys,
List indexorderbycols,
List pathkeys,
ScanDirection  indexscandir,
bool  indexonly,
Relids  required_outer,
double  loop_count,
bool  partial_path 
)

Definition at line 997 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_index(), get_baserel_parampathinfo(), IndexPath::indexclauses, IndexPath::indexinfo, IndexPath::indexorderbycols, IndexPath::indexorderbys, IndexPath::indexscandir, makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, IndexPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, IndexOptInfo::rel, RelOptInfo::reltarget, T_IndexOnlyScan, and T_IndexScan.

Referenced by build_index_paths(), and plan_cluster_use_sort().

1008 {
1009  IndexPath *pathnode = makeNode(IndexPath);
1010  RelOptInfo *rel = index->rel;
1011 
1012  pathnode->path.pathtype = indexonly ? T_IndexOnlyScan : T_IndexScan;
1013  pathnode->path.parent = rel;
1014  pathnode->path.pathtarget = rel->reltarget;
1015  pathnode->path.param_info = get_baserel_parampathinfo(root, rel,
1016  required_outer);
1017  pathnode->path.parallel_aware = false;
1018  pathnode->path.parallel_safe = rel->consider_parallel;
1019  pathnode->path.parallel_workers = 0;
1020  pathnode->path.pathkeys = pathkeys;
1021 
1022  pathnode->indexinfo = index;
1023  pathnode->indexclauses = indexclauses;
1024  pathnode->indexorderbys = indexorderbys;
1025  pathnode->indexorderbycols = indexorderbycols;
1026  pathnode->indexscandir = indexscandir;
1027 
1028  cost_index(pathnode, root, loop_count, partial_path);
1029 
1030  return pathnode;
1031 }
List * indexorderbycols
Definition: pathnodes.h:1214
PathTarget * pathtarget
Definition: pathnodes.h:1149
Path path
Definition: pathnodes.h:1210
IndexOptInfo * indexinfo
Definition: pathnodes.h:1211
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
List * indexclauses
Definition: pathnodes.h:1212
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * rel
Definition: pathnodes.h:820
RelOptInfo * parent
Definition: pathnodes.h:1148
void cost_index(IndexPath *path, PlannerInfo *root, double loop_count, bool partial_path)
Definition: costsize.c:488
List * indexorderbys
Definition: pathnodes.h:1213
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
ScanDirection indexscandir
Definition: pathnodes.h:1215
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_limit_path()

LimitPath* create_limit_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
Node limitOffset,
Node limitCount,
LimitOption  limitOption,
int64  offset_est,
int64  count_est 
)

Definition at line 3634 of file pathnode.c.

References adjust_limit_rows_costs(), RelOptInfo::consider_parallel, LimitPath::limitCount, LimitPath::limitOffset, LimitPath::limitOption, makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, LimitPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, Path::rows, Path::startup_cost, subpath(), LimitPath::subpath, T_Limit, and Path::total_cost.

Referenced by grouping_planner().

3639 {
3640  LimitPath *pathnode = makeNode(LimitPath);
3641 
3642  pathnode->path.pathtype = T_Limit;
3643  pathnode->path.parent = rel;
3644  /* Limit doesn't project, so use source path's pathtarget */
3645  pathnode->path.pathtarget = subpath->pathtarget;
3646  /* For now, assume we are above any joins, so no parameterization */
3647  pathnode->path.param_info = NULL;
3648  pathnode->path.parallel_aware = false;
3649  pathnode->path.parallel_safe = rel->consider_parallel &&
3650  subpath->parallel_safe;
3651  pathnode->path.parallel_workers = subpath->parallel_workers;
3652  pathnode->path.rows = subpath->rows;
3653  pathnode->path.startup_cost = subpath->startup_cost;
3654  pathnode->path.total_cost = subpath->total_cost;
3655  pathnode->path.pathkeys = subpath->pathkeys;
3656  pathnode->subpath = subpath;
3657  pathnode->limitOffset = limitOffset;
3658  pathnode->limitCount = limitCount;
3659  pathnode->limitOption = limitOption;
3660 
3661  /*
3662  * Adjust the output rows count and costs according to the offset/limit.
3663  */
3664  adjust_limit_rows_costs(&pathnode->path.rows,
3665  &pathnode->path.startup_cost,
3666  &pathnode->path.total_cost,
3667  offset_est, count_est);
3668 
3669  return pathnode;
3670 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
LimitOption limitOption
Definition: pathnodes.h:1840
Node * limitOffset
Definition: pathnodes.h:1838
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
void adjust_limit_rows_costs(double *rows, Cost *startup_cost, Cost *total_cost, int64 offset_est, int64 count_est)
Definition: pathnode.c:3689
NodeTag pathtype
Definition: pathnodes.h:1146
Cost startup_cost
Definition: pathnodes.h:1159
Path * subpath
Definition: pathnodes.h:1837
RelOptInfo * parent
Definition: pathnodes.h:1148
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
Path path
Definition: pathnodes.h:1836
bool parallel_aware
Definition: pathnodes.h:1153
Node * limitCount
Definition: pathnodes.h:1839
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241
Definition: nodes.h:87

◆ create_lockrows_path()

LockRowsPath* create_lockrows_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
List rowMarks,
int  epqParam 
)

Definition at line 3470 of file pathnode.c.

References cpu_tuple_cost, LockRowsPath::epqParam, makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, LockRowsPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, LockRowsPath::rowMarks, Path::rows, Path::startup_cost, subpath(), LockRowsPath::subpath, T_LockRows, and Path::total_cost.

Referenced by grouping_planner().

3472 {
3473  LockRowsPath *pathnode = makeNode(LockRowsPath);
3474 
3475  pathnode->path.pathtype = T_LockRows;
3476  pathnode->path.parent = rel;
3477  /* LockRows doesn't project, so use source path's pathtarget */
3478  pathnode->path.pathtarget = subpath->pathtarget;
3479  /* For now, assume we are above any joins, so no parameterization */
3480  pathnode->path.param_info = NULL;
3481  pathnode->path.parallel_aware = false;
3482  pathnode->path.parallel_safe = false;
3483  pathnode->path.parallel_workers = 0;
3484  pathnode->path.rows = subpath->rows;
3485 
3486  /*
3487  * The result cannot be assumed sorted, since locking might cause the sort
3488  * key columns to be replaced with new values.
3489  */
3490  pathnode->path.pathkeys = NIL;
3491 
3492  pathnode->subpath = subpath;
3493  pathnode->rowMarks = rowMarks;
3494  pathnode->epqParam = epqParam;
3495 
3496  /*
3497  * We should charge something extra for the costs of row locking and
3498  * possible refetches, but it's hard to say how much. For now, use
3499  * cpu_tuple_cost per row.
3500  */
3501  pathnode->path.startup_cost = subpath->startup_cost;
3502  pathnode->path.total_cost = subpath->total_cost +
3503  cpu_tuple_cost * subpath->rows;
3504 
3505  return pathnode;
3506 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
List * rowMarks
Definition: pathnodes.h:1802
NodeTag pathtype
Definition: pathnodes.h:1146
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
Path * subpath
Definition: pathnodes.h:1801
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
double cpu_tuple_cost
Definition: costsize.c:120
bool parallel_aware
Definition: pathnodes.h:1153
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_material_path()

MaterialPath* create_material_path ( RelOptInfo rel,
Path subpath 
)

Definition at line 1523 of file pathnode.c.

References Assert, RelOptInfo::consider_parallel, cost_material(), makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, MaterialPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, Path::rows, Path::startup_cost, subpath(), MaterialPath::subpath, T_Material, Path::total_cost, and PathTarget::width.

Referenced by match_unsorted_outer(), and set_tablesample_rel_pathlist().

1524 {
1525  MaterialPath *pathnode = makeNode(MaterialPath);
1526 
1527  Assert(subpath->parent == rel);
1528 
1529  pathnode->path.pathtype = T_Material;
1530  pathnode->path.parent = rel;
1531  pathnode->path.pathtarget = rel->reltarget;
1532  pathnode->path.param_info = subpath->param_info;
1533  pathnode->path.parallel_aware = false;
1534  pathnode->path.parallel_safe = rel->consider_parallel &&
1535  subpath->parallel_safe;
1536  pathnode->path.parallel_workers = subpath->parallel_workers;
1537  pathnode->path.pathkeys = subpath->pathkeys;
1538 
1539  pathnode->subpath = subpath;
1540 
1541  cost_material(&pathnode->path,
1542  subpath->startup_cost,
1543  subpath->total_cost,
1544  subpath->rows,
1545  subpath->pathtarget->width);
1546 
1547  return pathnode;
1548 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
Path * subpath
Definition: pathnodes.h:1456
NodeTag pathtype
Definition: pathnodes.h:1146
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
Cost total_cost
Definition: pathnodes.h:1160
void cost_material(Path *path, Cost input_startup_cost, Cost input_total_cost, double tuples, int width)
Definition: costsize.c:2266
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_merge_append_path()

MergeAppendPath* create_merge_append_path ( PlannerInfo root,
RelOptInfo rel,
List subpaths,
List pathkeys,
Relids  required_outer 
)

Definition at line 1375 of file pathnode.c.

References PlannerInfo::all_baserels, Assert, bms_equal(), RelOptInfo::consider_parallel, cost_merge_append(), cost_sort(), get_appendrel_parampathinfo(), lfirst, PlannerInfo::limit_tuples, MergeAppendPath::limit_tuples, list_length(), makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, MergeAppendPath::path, PATH_REQ_OUTER, Path::pathkeys, pathkeys_contained_in(), Path::pathtarget, Path::pathtype, RelOptInfo::relids, RelOptInfo::reltarget, Path::rows, Path::startup_cost, subpath(), MergeAppendPath::subpaths, T_MergeAppend, Path::total_cost, RelOptInfo::tuples, PathTarget::width, and work_mem.

Referenced by generate_orderedappend_paths().

1380 {
1382  Cost input_startup_cost;
1383  Cost input_total_cost;
1384  ListCell *l;
1385 
1386  pathnode->path.pathtype = T_MergeAppend;
1387  pathnode->path.parent = rel;
1388  pathnode->path.pathtarget = rel->reltarget;
1390  required_outer);
1391  pathnode->path.parallel_aware = false;
1392  pathnode->path.parallel_safe = rel->consider_parallel;
1393  pathnode->path.parallel_workers = 0;
1394  pathnode->path.pathkeys = pathkeys;
1395  pathnode->subpaths = subpaths;
1396 
1397  /*
1398  * Apply query-wide LIMIT if known and path is for sole base relation.
1399  * (Handling this at this low level is a bit klugy.)
1400  */
1401  if (bms_equal(rel->relids, root->all_baserels))
1402  pathnode->limit_tuples = root->limit_tuples;
1403  else
1404  pathnode->limit_tuples = -1.0;
1405 
1406  /*
1407  * Add up the sizes and costs of the input paths.
1408  */
1409  pathnode->path.rows = 0;
1410  input_startup_cost = 0;
1411  input_total_cost = 0;
1412  foreach(l, subpaths)
1413  {
1414  Path *subpath = (Path *) lfirst(l);
1415 
1416  pathnode->path.rows += subpath->rows;
1417  pathnode->path.parallel_safe = pathnode->path.parallel_safe &&
1418  subpath->parallel_safe;
1419 
1420  if (pathkeys_contained_in(pathkeys, subpath->pathkeys))
1421  {
1422  /* Subpath is adequately ordered, we won't need to sort it */
1423  input_startup_cost += subpath->startup_cost;
1424  input_total_cost += subpath->total_cost;
1425  }
1426  else
1427  {
1428  /* We'll need to insert a Sort node, so include cost for that */
1429  Path sort_path; /* dummy for result of cost_sort */
1430 
1431  cost_sort(&sort_path,
1432  root,
1433  pathkeys,
1434  subpath->total_cost,
1435  subpath->parent->tuples,
1436  subpath->pathtarget->width,
1437  0.0,
1438  work_mem,
1439  pathnode->limit_tuples);
1440  input_startup_cost += sort_path.startup_cost;
1441  input_total_cost += sort_path.total_cost;
1442  }
1443 
1444  /* All child paths must have same parameterization */
1445  Assert(bms_equal(PATH_REQ_OUTER(subpath), required_outer));
1446  }
1447 
1448  /*
1449  * Now we can compute total costs of the MergeAppend. If there's exactly
1450  * one child path, the MergeAppend is a no-op and will be discarded later
1451  * (in setrefs.c); otherwise we do the normal cost calculation.
1452  */
1453  if (list_length(subpaths) == 1)
1454  {
1455  pathnode->path.startup_cost = input_startup_cost;
1456  pathnode->path.total_cost = input_total_cost;
1457  }
1458  else
1459  cost_merge_append(&pathnode->path, root,
1460  pathkeys, list_length(subpaths),
1461  input_startup_cost, input_total_cost,
1462  pathnode->path.rows);
1463 
1464  return pathnode;
1465 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
double tuples
Definition: pathnodes.h:706
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
Relids all_baserels
Definition: pathnodes.h:221
double limit_tuples
Definition: pathnodes.h:331
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
Relids relids
Definition: pathnodes.h:666
bool pathkeys_contained_in(List *keys1, List *keys2)
Definition: pathkeys.c:324
void cost_sort(Path *path, PlannerInfo *root, List *pathkeys, Cost input_cost, double tuples, int width, Cost comparison_cost, int sort_mem, double limit_tuples)
Definition: costsize.c:1937
int work_mem
Definition: globals.c:122
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
void cost_merge_append(Path *path, PlannerInfo *root, List *pathkeys, int n_streams, Cost input_startup_cost, Cost input_total_cost, double tuples)
Definition: costsize.c:2217
#define Assert(condition)
Definition: c.h:804
#define lfirst(lc)
Definition: pg_list.h:169
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
static int list_length(const List *l)
Definition: pg_list.h:149
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
ParamPathInfo * get_appendrel_parampathinfo(RelOptInfo *appendrel, Relids required_outer)
Definition: relnode.c:1572
struct PathTarget * reltarget
Definition: pathnodes.h:677
double limit_tuples
Definition: pathnodes.h:1431
double Cost
Definition: nodes.h:664
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241
bool bms_equal(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:94

◆ create_mergejoin_path()

MergePath* create_mergejoin_path ( PlannerInfo root,
RelOptInfo joinrel,
JoinType  jointype,
JoinCostWorkspace workspace,
JoinPathExtraData extra,
Path outer_path,
Path inner_path,
List restrict_clauses,
List pathkeys,
Relids  required_outer,
List mergeclauses,
List outersortkeys,
List innersortkeys 
)

Definition at line 2417 of file pathnode.c.

References RelOptInfo::consider_parallel, final_cost_mergejoin(), get_joinrel_parampathinfo(), JoinPath::inner_unique, JoinPathExtraData::inner_unique, JoinPath::innerjoinpath, MergePath::innersortkeys, JoinPath::joinrestrictinfo, JoinPath::jointype, MergePath::jpath, makeNode, JoinPath::outerjoinpath, MergePath::outersortkeys, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, JoinPath::path, MergePath::path_mergeclauses, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, JoinPathExtraData::sjinfo, and T_MergeJoin.

Referenced by try_mergejoin_path(), and try_partial_mergejoin_path().

2430 {
2431  MergePath *pathnode = makeNode(MergePath);
2432 
2433  pathnode->jpath.path.pathtype = T_MergeJoin;
2434  pathnode->jpath.path.parent = joinrel;
2435  pathnode->jpath.path.pathtarget = joinrel->reltarget;
2436  pathnode->jpath.path.param_info =
2438  joinrel,
2439  outer_path,
2440  inner_path,
2441  extra->sjinfo,
2442  required_outer,
2443  &restrict_clauses);
2444  pathnode->jpath.path.parallel_aware = false;
2445  pathnode->jpath.path.parallel_safe = joinrel->consider_parallel &&
2446  outer_path->parallel_safe && inner_path->parallel_safe;
2447  /* This is a foolish way to estimate parallel_workers, but for now... */
2448  pathnode->jpath.path.parallel_workers = outer_path->parallel_workers;
2449  pathnode->jpath.path.pathkeys = pathkeys;
2450  pathnode->jpath.jointype = jointype;
2451  pathnode->jpath.inner_unique = extra->inner_unique;
2452  pathnode->jpath.outerjoinpath = outer_path;
2453  pathnode->jpath.innerjoinpath = inner_path;
2454  pathnode->jpath.joinrestrictinfo = restrict_clauses;
2455  pathnode->path_mergeclauses = mergeclauses;
2456  pathnode->outersortkeys = outersortkeys;
2457  pathnode->innersortkeys = innersortkeys;
2458  /* pathnode->skip_mark_restore will be set by final_cost_mergejoin */
2459  /* pathnode->materialize_inner will be set by final_cost_mergejoin */
2460 
2461  final_cost_mergejoin(root, pathnode, workspace, extra);
2462 
2463  return pathnode;
2464 }
List * path_mergeclauses
Definition: pathnodes.h:1581
List * outersortkeys
Definition: pathnodes.h:1582
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_joinrel_parampathinfo(PlannerInfo *root, RelOptInfo *joinrel, Path *outer_path, Path *inner_path, SpecialJoinInfo *sjinfo, Relids required_outer, List **restrict_clauses)
Definition: relnode.c:1365
Path * innerjoinpath
Definition: pathnodes.h:1526
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
SpecialJoinInfo * sjinfo
Definition: pathnodes.h:2430
List * joinrestrictinfo
Definition: pathnodes.h:1528
RelOptInfo * parent
Definition: pathnodes.h:1148
Path * outerjoinpath
Definition: pathnodes.h:1525
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
Path path
Definition: pathnodes.h:1518
bool parallel_safe
Definition: pathnodes.h:1154
bool inner_unique
Definition: pathnodes.h:1522
bool consider_parallel
Definition: pathnodes.h:674
List * innersortkeys
Definition: pathnodes.h:1583
JoinType jointype
Definition: pathnodes.h:1520
JoinPath jpath
Definition: pathnodes.h:1580
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677
void final_cost_mergejoin(PlannerInfo *root, MergePath *path, JoinCostWorkspace *workspace, JoinPathExtraData *extra)
Definition: costsize.c:3173

◆ create_minmaxagg_path()

MinMaxAggPath* create_minmaxagg_path ( PlannerInfo root,
RelOptInfo rel,
PathTarget target,
List mmaggregates,
List quals 
)

Definition at line 3230 of file pathnode.c.

References PathTarget::cost, cost_qual_eval(), cpu_tuple_cost, lfirst, makeNode, MinMaxAggPath::mmaggregates, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, MinMaxAggPath::path, MinMaxAggInfo::pathcost, Path::pathkeys, Path::pathtarget, Path::pathtype, QualCost::per_tuple, MinMaxAggPath::quals, Path::rows, QualCost::startup, Path::startup_cost, T_Result, and Path::total_cost.

Referenced by preprocess_minmax_aggregates().

3235 {
3236  MinMaxAggPath *pathnode = makeNode(MinMaxAggPath);
3237  Cost initplan_cost;
3238  ListCell *lc;
3239 
3240  /* The topmost generated Plan node will be a Result */
3241  pathnode->path.pathtype = T_Result;
3242  pathnode->path.parent = rel;
3243  pathnode->path.pathtarget = target;
3244  /* For now, assume we are above any joins, so no parameterization */
3245  pathnode->path.param_info = NULL;
3246  pathnode->path.parallel_aware = false;
3247  /* A MinMaxAggPath implies use of subplans, so cannot be parallel-safe */
3248  pathnode->path.parallel_safe = false;
3249  pathnode->path.parallel_workers = 0;
3250  /* Result is one unordered row */
3251  pathnode->path.rows = 1;
3252  pathnode->path.pathkeys = NIL;
3253 
3254  pathnode->mmaggregates = mmaggregates;
3255  pathnode->quals = quals;
3256 
3257  /* Calculate cost of all the initplans ... */
3258  initplan_cost = 0;
3259  foreach(lc, mmaggregates)
3260  {
3261  MinMaxAggInfo *mminfo = (MinMaxAggInfo *) lfirst(lc);
3262 
3263  initplan_cost += mminfo->pathcost;
3264  }
3265 
3266  /* add tlist eval cost for each output row, plus cpu_tuple_cost */
3267  pathnode->path.startup_cost = initplan_cost + target->cost.startup;
3268  pathnode->path.total_cost = initplan_cost + target->cost.startup +
3269  target->cost.per_tuple + cpu_tuple_cost;
3270 
3271  /*
3272  * Add cost of qual, if any --- but we ignore its selectivity, since our
3273  * rowcount estimate should be 1 no matter what the qual is.
3274  */
3275  if (quals)
3276  {
3277  QualCost qual_cost;
3278 
3279  cost_qual_eval(&qual_cost, quals, root);
3280  pathnode->path.startup_cost += qual_cost.startup;
3281  pathnode->path.total_cost += qual_cost.startup + qual_cost.per_tuple;
3282  }
3283 
3284  return pathnode;
3285 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
List * quals
Definition: pathnodes.h:1754
Cost startup
Definition: pathnodes.h:45
NodeTag pathtype
Definition: pathnodes.h:1146
Cost per_tuple
Definition: pathnodes.h:46
Definition: nodes.h:46
void cost_qual_eval(QualCost *cost, List *quals, PlannerInfo *root)
Definition: costsize.c:4066
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
List * mmaggregates
Definition: pathnodes.h:1753
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define lfirst(lc)
Definition: pg_list.h:169
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
double cpu_tuple_cost
Definition: costsize.c:120
bool parallel_aware
Definition: pathnodes.h:1153
double Cost
Definition: nodes.h:664

◆ create_modifytable_path()

ModifyTablePath* create_modifytable_path ( PlannerInfo root,
RelOptInfo rel,
CmdType  operation,
bool  canSetTag,
Index  nominalRelation,
Index  rootRelation,
bool  partColsUpdated,
List resultRelations,
List subpaths,
List subroots,
List withCheckOptionLists,
List returningLists,
List rowMarks,
OnConflictExpr onconflict,
int  epqParam 
)

Definition at line 3529 of file pathnode.c.

References Assert, ModifyTablePath::canSetTag, ModifyTablePath::epqParam, lfirst, list_head(), list_length(), makeNode, NIL, ModifyTablePath::nominalRelation, ModifyTablePath::onconflict, ModifyTablePath::operation, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, ModifyTablePath::partColsUpdated, ModifyTablePath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, ModifyTablePath::resultRelations, ModifyTablePath::returningLists, ModifyTablePath::rootRelation, ModifyTablePath::rowMarks, Path::rows, Path::startup_cost, subpath(), ModifyTablePath::subpaths, ModifyTablePath::subroots, T_ModifyTable, Path::total_cost, total_size, PathTarget::width, and ModifyTablePath::withCheckOptionLists.

Referenced by grouping_planner(), and inheritance_planner().

3538 {
3540  double total_size;
3541  ListCell *lc;
3542 
3543  Assert(list_length(resultRelations) == list_length(subpaths));
3544  Assert(list_length(resultRelations) == list_length(subroots));
3545  Assert(withCheckOptionLists == NIL ||
3546  list_length(resultRelations) == list_length(withCheckOptionLists));
3547  Assert(returningLists == NIL ||
3548  list_length(resultRelations) == list_length(returningLists));
3549 
3550  pathnode->path.pathtype = T_ModifyTable;
3551  pathnode->path.parent = rel;
3552  /* pathtarget is not interesting, just make it minimally valid */
3553  pathnode->path.pathtarget = rel->reltarget;
3554  /* For now, assume we are above any joins, so no parameterization */
3555  pathnode->path.param_info = NULL;
3556  pathnode->path.parallel_aware = false;
3557  pathnode->path.parallel_safe = false;
3558  pathnode->path.parallel_workers = 0;
3559  pathnode->path.pathkeys = NIL;
3560 
3561  /*
3562  * Compute cost & rowcount as sum of subpath costs & rowcounts.
3563  *
3564  * Currently, we don't charge anything extra for the actual table
3565  * modification work, nor for the WITH CHECK OPTIONS or RETURNING
3566  * expressions if any. It would only be window dressing, since
3567  * ModifyTable is always a top-level node and there is no way for the
3568  * costs to change any higher-level planning choices. But we might want
3569  * to make it look better sometime.
3570  */
3571  pathnode->path.startup_cost = 0;
3572  pathnode->path.total_cost = 0;
3573  pathnode->path.rows = 0;
3574  total_size = 0;
3575  foreach(lc, subpaths)
3576  {
3577  Path *subpath = (Path *) lfirst(lc);
3578 
3579  if (lc == list_head(subpaths)) /* first node? */
3580  pathnode->path.startup_cost = subpath->startup_cost;
3581  pathnode->path.total_cost += subpath->total_cost;
3582  if (returningLists != NIL)
3583  {
3584  pathnode->path.rows += subpath->rows;
3585  total_size += subpath->pathtarget->width * subpath->rows;
3586  }
3587  }
3588 
3589  /*
3590  * Set width to the average width of the subpath outputs. XXX this is
3591  * totally wrong: we should return an average of the RETURNING tlist
3592  * widths. But it's what happened historically, and improving it is a task
3593  * for another day.
3594  */
3595  if (pathnode->path.rows > 0)
3596  total_size /= pathnode->path.rows;
3597  pathnode->path.pathtarget->width = rint(total_size);
3598 
3599  pathnode->operation = operation;
3600  pathnode->canSetTag = canSetTag;
3601  pathnode->nominalRelation = nominalRelation;
3602  pathnode->rootRelation = rootRelation;
3603  pathnode->partColsUpdated = partColsUpdated;
3604  pathnode->resultRelations = resultRelations;
3605  pathnode->subpaths = subpaths;
3606  pathnode->subroots = subroots;
3607  pathnode->withCheckOptionLists = withCheckOptionLists;
3608  pathnode->returningLists = returningLists;
3609  pathnode->rowMarks = rowMarks;
3610  pathnode->onconflict = onconflict;
3611  pathnode->epqParam = epqParam;
3612 
3613  return pathnode;
3614 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
List * returningLists
Definition: pathnodes.h:1825
OnConflictExpr * onconflict
Definition: pathnodes.h:1827
Index nominalRelation
Definition: pathnodes.h:1818
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
Cost startup_cost
Definition: pathnodes.h:1159
bool partColsUpdated
Definition: pathnodes.h:1820
RelOptInfo * parent
Definition: pathnodes.h:1148
static ListCell * list_head(const List *l)
Definition: pg_list.h:125
int64 total_size
Definition: pg_checksums.c:68
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define Assert(condition)
Definition: c.h:804
#define lfirst(lc)
Definition: pg_list.h:169
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
Index rootRelation
Definition: pathnodes.h:1819
static int list_length(const List *l)
Definition: pg_list.h:149
List * withCheckOptionLists
Definition: pathnodes.h:1824
CmdType operation
Definition: pathnodes.h:1816
List * resultRelations
Definition: pathnodes.h:1821
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_namedtuplestorescan_path()

Path* create_namedtuplestorescan_path ( PlannerInfo root,
RelOptInfo rel,
Relids  required_outer 
)

Definition at line 2044 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_namedtuplestorescan(), get_baserel_parampathinfo(), makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, and T_NamedTuplestoreScan.

Referenced by set_namedtuplestore_pathlist().

2046 {
2047  Path *pathnode = makeNode(Path);
2048 
2049  pathnode->pathtype = T_NamedTuplestoreScan;
2050  pathnode->parent = rel;
2051  pathnode->pathtarget = rel->reltarget;
2052  pathnode->param_info = get_baserel_parampathinfo(root, rel,
2053  required_outer);
2054  pathnode->parallel_aware = false;
2055  pathnode->parallel_safe = rel->consider_parallel;
2056  pathnode->parallel_workers = 0;
2057  pathnode->pathkeys = NIL; /* result is always unordered */
2058 
2059  cost_namedtuplestorescan(pathnode, root, rel, pathnode->param_info);
2060 
2061  return pathnode;
2062 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
void cost_namedtuplestorescan(Path *path, PlannerInfo *root, RelOptInfo *baserel, ParamPathInfo *param_info)
Definition: costsize.c:1551
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_nestloop_path()

NestPath* create_nestloop_path ( PlannerInfo root,
RelOptInfo joinrel,
JoinType  jointype,
JoinCostWorkspace workspace,
JoinPathExtraData extra,
Path outer_path,
Path inner_path,
List restrict_clauses,
List pathkeys,
Relids  required_outer 
)

Definition at line 2329 of file pathnode.c.

References bms_overlap(), bms_union(), RelOptInfo::consider_parallel, final_cost_nestloop(), get_joinrel_parampathinfo(), JoinPath::inner_unique, JoinPathExtraData::inner_unique, JoinPath::innerjoinpath, join_clause_is_movable_into(), JoinPath::joinrestrictinfo, JoinPath::jointype, lappend(), lfirst, makeNode, NIL, JoinPath::outerjoinpath, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, JoinPath::path, PATH_REQ_OUTER, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::relids, RelOptInfo::reltarget, JoinPathExtraData::sjinfo, and T_NestLoop.

Referenced by try_nestloop_path(), and try_partial_nestloop_path().

2339 {
2340  NestPath *pathnode = makeNode(NestPath);
2341  Relids inner_req_outer = PATH_REQ_OUTER(inner_path);
2342 
2343  /*
2344  * If the inner path is parameterized by the outer, we must drop any
2345  * restrict_clauses that are due to be moved into the inner path. We have
2346  * to do this now, rather than postpone the work till createplan time,
2347  * because the restrict_clauses list can affect the size and cost
2348  * estimates for this path.
2349  */
2350  if (bms_overlap(inner_req_outer, outer_path->parent->relids))
2351  {
2352  Relids inner_and_outer = bms_union(inner_path->parent->relids,
2353  inner_req_outer);
2354  List *jclauses = NIL;
2355  ListCell *lc;
2356 
2357  foreach(lc, restrict_clauses)
2358  {
2359  RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
2360 
2361  if (!join_clause_is_movable_into(rinfo,
2362  inner_path->parent->relids,
2363  inner_and_outer))
2364  jclauses = lappend(jclauses, rinfo);
2365  }
2366  restrict_clauses = jclauses;
2367  }
2368 
2369  pathnode->path.pathtype = T_NestLoop;
2370  pathnode->path.parent = joinrel;
2371  pathnode->path.pathtarget = joinrel->reltarget;
2372  pathnode->path.param_info =
2374  joinrel,
2375  outer_path,
2376  inner_path,
2377  extra->sjinfo,
2378  required_outer,
2379  &restrict_clauses);
2380  pathnode->path.parallel_aware = false;
2381  pathnode->path.parallel_safe = joinrel->consider_parallel &&
2382  outer_path->parallel_safe && inner_path->parallel_safe;
2383  /* This is a foolish way to estimate parallel_workers, but for now... */
2384  pathnode->path.parallel_workers = outer_path->parallel_workers;
2385  pathnode->path.pathkeys = pathkeys;
2386  pathnode->jointype = jointype;
2387  pathnode->inner_unique = extra->inner_unique;
2388  pathnode->outerjoinpath = outer_path;
2389  pathnode->innerjoinpath = inner_path;
2390  pathnode->joinrestrictinfo = restrict_clauses;
2391 
2392  final_cost_nestloop(root, pathnode, workspace, extra);
2393 
2394  return pathnode;
2395 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_joinrel_parampathinfo(PlannerInfo *root, RelOptInfo *joinrel, Path *outer_path, Path *inner_path, SpecialJoinInfo *sjinfo, Relids required_outer, List **restrict_clauses)
Definition: relnode.c:1365
Path * innerjoinpath
Definition: pathnodes.h:1526
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
void final_cost_nestloop(PlannerInfo *root, NestPath *path, JoinCostWorkspace *workspace, JoinPathExtraData *extra)
Definition: costsize.c:2737
SpecialJoinInfo * sjinfo
Definition: pathnodes.h:2430
List * joinrestrictinfo
Definition: pathnodes.h:1528
RelOptInfo * parent
Definition: pathnodes.h:1148
#define PATH_REQ_OUTER(path)
Definition: pathnodes.h:1167
Relids relids
Definition: pathnodes.h:666
bool join_clause_is_movable_into(RestrictInfo *rinfo, Relids currentrelids, Relids current_and_outer)
Definition: restrictinfo.c:588
List * lappend(List *list, void *datum)
Definition: list.c:336
Path * outerjoinpath
Definition: pathnodes.h:1525
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
Path path
Definition: pathnodes.h:1518
#define lfirst(lc)
Definition: pg_list.h:169
bool parallel_safe
Definition: pathnodes.h:1154
Bitmapset * bms_union(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:225
bool inner_unique
Definition: pathnodes.h:1522
bool consider_parallel
Definition: pathnodes.h:674
bool bms_overlap(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:494
JoinType jointype
Definition: pathnodes.h:1520
bool parallel_aware
Definition: pathnodes.h:1153
Definition: pg_list.h:50
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_projection_path()

ProjectionPath* create_projection_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
PathTarget target 
)

Definition at line 2549 of file pathnode.c.

References RelOptInfo::consider_parallel, PathTarget::cost, cpu_tuple_cost, ProjectionPath::dummypp, equal(), PathTarget::exprs, is_parallel_safe(), is_projection_capable_path(), makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, ProjectionPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, QualCost::per_tuple, Path::rows, QualCost::startup, Path::startup_cost, subpath(), ProjectionPath::subpath, T_Result, and Path::total_cost.

Referenced by adjust_paths_for_srfs(), apply_projection_to_path(), apply_scanjoin_target_to_paths(), and recurse_set_operations().

2553 {
2554  ProjectionPath *pathnode = makeNode(ProjectionPath);
2555  PathTarget *oldtarget = subpath->pathtarget;
2556 
2557  pathnode->path.pathtype = T_Result;
2558  pathnode->path.parent = rel;
2559  pathnode->path.pathtarget = target;
2560  /* For now, assume we are above any joins, so no parameterization */
2561  pathnode->path.param_info = NULL;
2562  pathnode->path.parallel_aware = false;
2563  pathnode->path.parallel_safe = rel->consider_parallel &&
2564  subpath->parallel_safe &&
2565  is_parallel_safe(root, (Node *) target->exprs);
2566  pathnode->path.parallel_workers = subpath->parallel_workers;
2567  /* Projection does not change the sort order */
2568  pathnode->path.pathkeys = subpath->pathkeys;
2569 
2570  pathnode->subpath = subpath;
2571 
2572  /*
2573  * We might not need a separate Result node. If the input plan node type
2574  * can project, we can just tell it to project something else. Or, if it
2575  * can't project but the desired target has the same expression list as
2576  * what the input will produce anyway, we can still give it the desired
2577  * tlist (possibly changing its ressortgroupref labels, but nothing else).
2578  * Note: in the latter case, create_projection_plan has to recheck our
2579  * conclusion; see comments therein.
2580  */
2581  if (is_projection_capable_path(subpath) ||
2582  equal(oldtarget->exprs, target->exprs))
2583  {
2584  /* No separate Result node needed */
2585  pathnode->dummypp = true;
2586 
2587  /*
2588  * Set cost of plan as subpath's cost, adjusted for tlist replacement.
2589  */
2590  pathnode->path.rows = subpath->rows;
2591  pathnode->path.startup_cost = subpath->startup_cost +
2592  (target->cost.startup - oldtarget->cost.startup);
2593  pathnode->path.total_cost = subpath->total_cost +
2594  (target->cost.startup - oldtarget->cost.startup) +
2595  (target->cost.per_tuple - oldtarget->cost.per_tuple) * subpath->rows;
2596  }
2597  else
2598  {
2599  /* We really do need the Result node */
2600  pathnode->dummypp = false;
2601 
2602  /*
2603  * The Result node's cost is cpu_tuple_cost per row, plus the cost of
2604  * evaluating the tlist. There is no qual to worry about.
2605  */
2606  pathnode->path.rows = subpath->rows;
2607  pathnode->path.startup_cost = subpath->startup_cost +
2608  target->cost.startup;
2609  pathnode->path.total_cost = subpath->total_cost +
2610  target->cost.startup +
2611  (cpu_tuple_cost + target->cost.per_tuple) * subpath->rows;
2612  }
2613 
2614  return pathnode;
2615 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:3073
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
Definition: nodes.h:530
Cost startup
Definition: pathnodes.h:45
NodeTag pathtype
Definition: pathnodes.h:1146
bool is_parallel_safe(PlannerInfo *root, Node *node)
Definition: clauses.c:567
Cost per_tuple
Definition: pathnodes.h:46
Definition: nodes.h:46
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
List * exprs
Definition: pathnodes.h:1078
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
bool consider_parallel
Definition: pathnodes.h:674
double cpu_tuple_cost
Definition: costsize.c:120
bool is_projection_capable_path(Path *path)
Definition: createplan.c:6926
bool parallel_aware
Definition: pathnodes.h:1153
Path * subpath
Definition: pathnodes.h:1622
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_recursiveunion_path()

RecursiveUnionPath* create_recursiveunion_path ( PlannerInfo root,
RelOptInfo rel,
Path leftpath,
Path rightpath,
PathTarget target,
List distinctList,
int  wtParam,
double  numGroups 
)

Definition at line 3425 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_recursive_union(), RecursiveUnionPath::distinctList, RecursiveUnionPath::leftpath, makeNode, NIL, RecursiveUnionPath::numGroups, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, RecursiveUnionPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, RecursiveUnionPath::rightpath, T_RecursiveUnion, and RecursiveUnionPath::wtParam.

Referenced by generate_recursion_path().

3433 {
3435 
3436  pathnode->path.pathtype = T_RecursiveUnion;
3437  pathnode->path.parent = rel;
3438  pathnode->path.pathtarget = target;
3439  /* For now, assume we are above any joins, so no parameterization */
3440  pathnode->path.param_info = NULL;
3441  pathnode->path.parallel_aware = false;
3442  pathnode->path.parallel_safe = rel->consider_parallel &&
3443  leftpath->parallel_safe && rightpath->parallel_safe;
3444  /* Foolish, but we'll do it like joins for now: */
3445  pathnode->path.parallel_workers = leftpath->parallel_workers;
3446  /* RecursiveUnion result is always unsorted */
3447  pathnode->path.pathkeys = NIL;
3448 
3449  pathnode->leftpath = leftpath;
3450  pathnode->rightpath = rightpath;
3451  pathnode->distinctList = distinctList;
3452  pathnode->wtParam = wtParam;
3453  pathnode->numGroups = numGroups;
3454 
3455  cost_recursive_union(&pathnode->path, leftpath, rightpath);
3456 
3457  return pathnode;
3458 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
void cost_recursive_union(Path *runion, Path *nrterm, Path *rterm)
Definition: costsize.c:1625
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153

◆ create_resultscan_path()

Path* create_resultscan_path ( PlannerInfo root,
RelOptInfo rel,
Relids  required_outer 
)

Definition at line 2070 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_resultscan(), get_baserel_parampathinfo(), makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, and T_Result.

Referenced by reparameterize_path(), and set_result_pathlist().

2072 {
2073  Path *pathnode = makeNode(Path);
2074 
2075  pathnode->pathtype = T_Result;
2076  pathnode->parent = rel;
2077  pathnode->pathtarget = rel->reltarget;
2078  pathnode->param_info = get_baserel_parampathinfo(root, rel,
2079  required_outer);
2080  pathnode->parallel_aware = false;
2081  pathnode->parallel_safe = rel->consider_parallel;
2082  pathnode->parallel_workers = 0;
2083  pathnode->pathkeys = NIL; /* result is always unordered */
2084 
2085  cost_resultscan(pathnode, root, rel, pathnode->param_info);
2086 
2087  return pathnode;
2088 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
Definition: nodes.h:46
RelOptInfo * parent
Definition: pathnodes.h:1148
void cost_resultscan(Path *path, PlannerInfo *root, RelOptInfo *baserel, ParamPathInfo *param_info)
Definition: costsize.c:1588
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_samplescan_path()

Path* create_samplescan_path ( PlannerInfo root,
RelOptInfo rel,
Relids  required_outer 
)

Definition at line 954 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_samplescan(), get_baserel_parampathinfo(), makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, and T_SampleScan.

Referenced by reparameterize_path(), and set_tablesample_rel_pathlist().

955 {
956  Path *pathnode = makeNode(Path);
957 
958  pathnode->pathtype = T_SampleScan;
959  pathnode->parent = rel;
960  pathnode->pathtarget = rel->reltarget;
961  pathnode->param_info = get_baserel_parampathinfo(root, rel,
962  required_outer);
963  pathnode->parallel_aware = false;
964  pathnode->parallel_safe = rel->consider_parallel;
965  pathnode->parallel_workers = 0;
966  pathnode->pathkeys = NIL; /* samplescan has unordered result */
967 
968  cost_samplescan(pathnode, root, rel, pathnode->param_info);
969 
970  return pathnode;
971 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
void cost_samplescan(Path *path, PlannerInfo *root, RelOptInfo *baserel, ParamPathInfo *param_info)
Definition: costsize.c:300
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_seqscan_path()

Path* create_seqscan_path ( PlannerInfo root,
RelOptInfo rel,
Relids  required_outer,
int  parallel_workers 
)

Definition at line 929 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_seqscan(), get_baserel_parampathinfo(), makeNode, NIL, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, Path::pathkeys, Path::pathtarget, Path::pathtype, RelOptInfo::reltarget, T_SeqScan, and true.

Referenced by create_plain_partial_paths(), plan_cluster_use_sort(), reparameterize_path(), and set_plain_rel_pathlist().

931 {
932  Path *pathnode = makeNode(Path);
933 
934  pathnode->pathtype = T_SeqScan;
935  pathnode->parent = rel;
936  pathnode->pathtarget = rel->reltarget;
937  pathnode->param_info = get_baserel_parampathinfo(root, rel,
938  required_outer);
939  pathnode->parallel_aware = parallel_workers > 0 ? true : false;
940  pathnode->parallel_safe = rel->consider_parallel;
941  pathnode->parallel_workers = parallel_workers;
942  pathnode->pathkeys = NIL; /* seqscan has unordered result */
943 
944  cost_seqscan(pathnode, root, rel, pathnode->param_info);
945 
946  return pathnode;
947 }
#define NIL
Definition: pg_list.h:65
PathTarget * pathtarget
Definition: pathnodes.h:1149
ParamPathInfo * get_baserel_parampathinfo(PlannerInfo *root, RelOptInfo *baserel, Relids required_outer)
Definition: relnode.c:1275
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
NodeTag pathtype
Definition: pathnodes.h:1146
#define true
Definition: c.h:395
void cost_seqscan(Path *path, PlannerInfo *root, RelOptInfo *baserel, ParamPathInfo *param_info)
Definition: costsize.c:223
RelOptInfo * parent
Definition: pathnodes.h:1148
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
struct PathTarget * reltarget
Definition: pathnodes.h:677

◆ create_set_projection_path()

ProjectSetPath* create_set_projection_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
PathTarget target 
)

Definition at line 2729 of file pathnode.c.

References RelOptInfo::consider_parallel, PathTarget::cost, cpu_tuple_cost, expression_returns_set_rows(), PathTarget::exprs, is_parallel_safe(), lfirst, makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, ProjectSetPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, QualCost::per_tuple, Path::rows, QualCost::startup, Path::startup_cost, subpath(), ProjectSetPath::subpath, T_ProjectSet, and Path::total_cost.

Referenced by adjust_paths_for_srfs().

2733 {
2734  ProjectSetPath *pathnode = makeNode(ProjectSetPath);
2735  double tlist_rows;
2736  ListCell *lc;
2737 
2738  pathnode->path.pathtype = T_ProjectSet;
2739  pathnode->path.parent = rel;
2740  pathnode->path.pathtarget = target;
2741  /* For now, assume we are above any joins, so no parameterization */
2742  pathnode->path.param_info = NULL;
2743  pathnode->path.parallel_aware = false;
2744  pathnode->path.parallel_safe = rel->consider_parallel &&
2745  subpath->parallel_safe &&
2746  is_parallel_safe(root, (Node *) target->exprs);
2747  pathnode->path.parallel_workers = subpath->parallel_workers;
2748  /* Projection does not change the sort order XXX? */
2749  pathnode->path.pathkeys = subpath->pathkeys;
2750 
2751  pathnode->subpath = subpath;
2752 
2753  /*
2754  * Estimate number of rows produced by SRFs for each row of input; if
2755  * there's more than one in this node, use the maximum.
2756  */
2757  tlist_rows = 1;
2758  foreach(lc, target->exprs)
2759  {
2760  Node *node = (Node *) lfirst(lc);
2761  double itemrows;
2762 
2763  itemrows = expression_returns_set_rows(root, node);
2764  if (tlist_rows < itemrows)
2765  tlist_rows = itemrows;
2766  }
2767 
2768  /*
2769  * In addition to the cost of evaluating the tlist, charge cpu_tuple_cost
2770  * per input row, and half of cpu_tuple_cost for each added output row.
2771  * This is slightly bizarre maybe, but it's what 9.6 did; we may revisit
2772  * this estimate later.
2773  */
2774  pathnode->path.rows = subpath->rows * tlist_rows;
2775  pathnode->path.startup_cost = subpath->startup_cost +
2776  target->cost.startup;
2777  pathnode->path.total_cost = subpath->total_cost +
2778  target->cost.startup +
2779  (cpu_tuple_cost + target->cost.per_tuple) * subpath->rows +
2780  (pathnode->path.rows - subpath->rows) * cpu_tuple_cost / 2;
2781 
2782  return pathnode;
2783 }
double expression_returns_set_rows(PlannerInfo *root, Node *clause)
Definition: clauses.c:282
PathTarget * pathtarget
Definition: pathnodes.h:1149
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
Definition: nodes.h:530
Cost startup
Definition: pathnodes.h:45
NodeTag pathtype
Definition: pathnodes.h:1146
bool is_parallel_safe(PlannerInfo *root, Node *node)
Definition: clauses.c:567
Cost per_tuple
Definition: pathnodes.h:46
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
List * exprs
Definition: pathnodes.h:1078
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
#define lfirst(lc)
Definition: pg_list.h:169
Path * subpath
Definition: pathnodes.h:1634
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
QualCost cost
Definition: pathnodes.h:1080
bool consider_parallel
Definition: pathnodes.h:674
double cpu_tuple_cost
Definition: costsize.c:120
bool parallel_aware
Definition: pathnodes.h:1153
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_setop_path()

SetOpPath* create_setop_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
SetOpCmd  cmd,
SetOpStrategy  strategy,
List distinctList,
AttrNumber  flagColIdx,
int  firstFlag,
double  numGroups,
double  outputRows 
)

Definition at line 3363 of file pathnode.c.

References SetOpPath::cmd, RelOptInfo::consider_parallel, cpu_operator_cost, SetOpPath::distinctList, SetOpPath::firstFlag, SetOpPath::flagColIdx, list_length(), makeNode, NIL, SetOpPath::numGroups, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, SetOpPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, Path::rows, SETOP_SORTED, Path::startup_cost, SetOpPath::strategy, SetOpPath::subpath, T_SetOp, and Path::total_cost.

Referenced by generate_nonunion_paths().

3373 {
3374  SetOpPath *pathnode = makeNode(SetOpPath);
3375 
3376  pathnode->path.pathtype = T_SetOp;
3377  pathnode->path.parent = rel;
3378  /* SetOp doesn't project, so use source path's pathtarget */
3379  pathnode->path.pathtarget = subpath->pathtarget;
3380  /* For now, assume we are above any joins, so no parameterization */
3381  pathnode->path.param_info = NULL;
3382  pathnode->path.parallel_aware = false;
3383  pathnode->path.parallel_safe = rel->consider_parallel &&
3384  subpath->parallel_safe;
3385  pathnode->path.parallel_workers = subpath->parallel_workers;
3386  /* SetOp preserves the input sort order if in sort mode */
3387  pathnode->path.pathkeys =
3388  (strategy == SETOP_SORTED) ? subpath->pathkeys : NIL;
3389 
3390  pathnode->subpath = subpath;
3391  pathnode->cmd = cmd;
3392  pathnode->strategy = strategy;
3393  pathnode->distinctList = distinctList;
3394  pathnode->flagColIdx = flagColIdx;
3395  pathnode->firstFlag = firstFlag;
3396  pathnode->numGroups = numGroups;
3397 
3398  /*
3399  * Charge one cpu_operator_cost per comparison per input tuple. We assume
3400  * all columns get compared at most of the tuples.
3401  */
3402  pathnode->path.startup_cost = subpath->startup_cost;
3403  pathnode->path.total_cost = subpath->total_cost +
3404  cpu_operator_cost * subpath->rows * list_length(distinctList);
3405  pathnode->path.rows = outputRows;
3406 
3407  return pathnode;
3408 }
#define NIL
Definition: pg_list.h:65
List * distinctList
Definition: pathnodes.h:1776
PathTarget * pathtarget
Definition: pathnodes.h:1149
SetOpStrategy strategy
Definition: pathnodes.h:1775
Path * subpath
Definition: pathnodes.h:1773
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
double numGroups
Definition: pathnodes.h:1779
NodeTag pathtype
Definition: pathnodes.h:1146
SetOpCmd cmd
Definition: pathnodes.h:1774
Cost startup_cost
Definition: pathnodes.h:1159
RelOptInfo * parent
Definition: pathnodes.h:1148
AttrNumber flagColIdx
Definition: pathnodes.h:1777
double cpu_operator_cost
Definition: costsize.c:122
Cost total_cost
Definition: pathnodes.h:1160
int firstFlag
Definition: pathnodes.h:1778
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
static int list_length(const List *l)
Definition: pg_list.h:149
bool consider_parallel
Definition: pathnodes.h:674
Definition: nodes.h:85
bool parallel_aware
Definition: pathnodes.h:1153
Path path
Definition: pathnodes.h:1772

◆ create_sort_path()

SortPath* create_sort_path ( PlannerInfo root,
RelOptInfo rel,
Path subpath,
List pathkeys,
double  limit_tuples 
)

Definition at line 2847 of file pathnode.c.

References RelOptInfo::consider_parallel, cost_sort(), makeNode, Path::parallel_aware, Path::parallel_safe, Path::parallel_workers, Path::param_info, Path::parent, SortPath::path, Path::pathkeys, Path::pathtarget, Path::pathtype, Path::rows, subpath(), SortPath::subpath, T_Sort, Path::total_cost, PathTarget::width, and work_mem.

Referenced by add_paths_to_grouping_rel(), add_paths_with_pathkeys_for_rel(), create_distinct_paths(), create_one_window_path(), create_ordered_paths(), create_partial_grouping_paths(), gather_grouping_paths(), generate_nonunion_paths(), generate_useful_gather_paths(), and make_union_unique().

2852 {
2853  SortPath *pathnode = makeNode(SortPath);
2854 
2855  pathnode->path.pathtype = T_Sort;
2856  pathnode->path.parent = rel;
2857  /* Sort doesn't project, so use source path's pathtarget */
2858  pathnode->path.pathtarget = subpath->pathtarget;
2859  /* For now, assume we are above any joins, so no parameterization */
2860  pathnode->path.param_info = NULL;
2861  pathnode->path.parallel_aware = false;
2862  pathnode->path.parallel_safe = rel->consider_parallel &&
2863  subpath->parallel_safe;
2864  pathnode->path.parallel_workers = subpath->parallel_workers;
2865  pathnode->path.pathkeys = pathkeys;
2866 
2867  pathnode->subpath = subpath;
2868 
2869  cost_sort(&pathnode->path, root, pathkeys,
2870  subpath->total_cost,
2871  subpath->rows,
2872  subpath->pathtarget->width,
2873  0.0, /* XXX comparison_cost shouldn't be 0? */
2874  work_mem, limit_tuples);
2875 
2876  return pathnode;
2877 }
PathTarget * pathtarget
Definition: pathnodes.h:1149
Path * subpath
Definition: pathnodes.h:1648
int parallel_workers
Definition: pathnodes.h:1155
ParamPathInfo * param_info
Definition: pathnodes.h:1151
Definition: nodes.h:76
NodeTag pathtype
Definition: pathnodes.h:1146
RelOptInfo * parent
Definition: pathnodes.h:1148
void cost_sort(Path *path, PlannerInfo *root, List *pathkeys, Cost input_cost, double tuples, int width, Cost comparison_cost, int sort_mem, double limit_tuples)
Definition: costsize.c:1937
int work_mem
Definition: globals.c:122
Cost total_cost
Definition: pathnodes.h:1160
List * pathkeys
Definition: pathnodes.h:1162
#define makeNode(_type_)
Definition: nodes.h:578
double rows
Definition: pathnodes.h:1158
bool parallel_safe
Definition: pathnodes.h:1154
bool consider_parallel
Definition: pathnodes.h:674
bool parallel_aware
Definition: pathnodes.h:1153
Path path
Definition: pathnodes.h:1647
Datum subpath(PG_FUNCTION_ARGS)
Definition: ltree_op.c:241

◆ create_subqueryscan_path()

SubqueryScanPath* create_subqueryscan_path ( PlannerInfo