#include "postgres.h"
#include <limits.h>
#include "miscadmin.h"
#include "optimizer/clauses.h"
#include "optimizer/cost.h"
#include "optimizer/pathnode.h"
#include "optimizer/paths.h"
#include "optimizer/placeholder.h"
#include "optimizer/plancat.h"
#include "optimizer/restrictinfo.h"
#include "optimizer/tlist.h"
#include "utils/hsearch.h"

Include dependency graph for relnode.c:

Data Structures
struct	JoinHashEntry

Typedefs
typedef struct JoinHashEntry	JoinHashEntry

Functions
static void	build_joinrel_tlist (PlannerInfo root, RelOptInfo joinrel, RelOptInfo *input_rel)

static List *	build_joinrel_restrictlist (PlannerInfo root, RelOptInfo joinrel, RelOptInfo outer_rel, RelOptInfo inner_rel)

static void	build_joinrel_joinlist (RelOptInfo joinrel, RelOptInfo outer_rel, RelOptInfo *inner_rel)

static List *	subbuild_joinrel_restrictlist (RelOptInfo joinrel, List joininfo_list, List *new_restrictlist)

static List *	subbuild_joinrel_joinlist (RelOptInfo joinrel, List joininfo_list, List *new_joininfo)

static void	set_foreign_rel_properties (RelOptInfo joinrel, RelOptInfo outer_rel, RelOptInfo *inner_rel)

static void	add_join_rel (PlannerInfo root, RelOptInfo joinrel)

void	setup_simple_rel_arrays (PlannerInfo *root)

RelOptInfo *	build_simple_rel (PlannerInfo root, int relid, RelOptInfo parent)

RelOptInfo *	find_base_rel (PlannerInfo *root, int relid)

static void	build_join_rel_hash (PlannerInfo *root)

RelOptInfo *	find_join_rel (PlannerInfo *root, Relids relids)

RelOptInfo *	build_join_rel (PlannerInfo root, Relids joinrelids, RelOptInfo outer_rel, RelOptInfo inner_rel, SpecialJoinInfo sjinfo, List **restrictlist_ptr)

Relids	min_join_parameterization (PlannerInfo root, Relids joinrelids, RelOptInfo outer_rel, RelOptInfo *inner_rel)

RelOptInfo *	build_empty_join_rel (PlannerInfo *root)

RelOptInfo *	fetch_upper_rel (PlannerInfo *root, UpperRelationKind kind, Relids relids)

AppendRelInfo *	find_childrel_appendrelinfo (PlannerInfo root, RelOptInfo rel)

Relids	find_childrel_parents (PlannerInfo root, RelOptInfo rel)

ParamPathInfo *	get_baserel_parampathinfo (PlannerInfo root, RelOptInfo baserel, Relids required_outer)

ParamPathInfo *	get_joinrel_parampathinfo (PlannerInfo root, RelOptInfo joinrel, Path outer_path, Path inner_path, SpecialJoinInfo sjinfo, Relids required_outer, List *restrict_clauses)

ParamPathInfo *	get_appendrel_parampathinfo (RelOptInfo *appendrel, Relids required_outer)

Typedef Documentation

typedef struct JoinHashEntry JoinHashEntry

Function Documentation

static void add_join_rel	(	PlannerInfo *	root,
		RelOptInfo *	joinrel
	)

static

Definition at line 409 of file relnode.c.

References Assert, HASH_ENTER, hash_search(), JoinHashEntry::join_rel, PlannerInfo::join_rel_hash, PlannerInfo::join_rel_list, lappend(), and RelOptInfo::relids.

Referenced by build_join_rel().

 {
     /* GEQO requires us to append the new joinrel to the end of the list! */
     root->join_rel_list = lappend(root->join_rel_list, joinrel);
 
     /* store it into the auxiliary hashtable if there is one. */
     if (root->join_rel_hash)
     {
         JoinHashEntry *hentry;
         bool        found;
 
         hentry = (JoinHashEntry *) hash_search(root->join_rel_hash,
                                                &(joinrel->relids),
                                                HASH_ENTER,
                                                &found);
         Assert(!found);
         hentry->join_rel = joinrel;
     }
 }

RelOptInfo* build_empty_join_rel ( PlannerInfo * root )

Definition at line 885 of file relnode.c.

References Assert, create_empty_pathtarget(), PlannerInfo::join_rel_list, lappend(), makeNode, NIL, NULL, RelOptInfo::relids, RELOPT_JOINREL, RelOptInfo::reloptkind, RelOptInfo::reltarget, RelOptInfo::rows, RTE_JOIN, and RelOptInfo::rtekind.

Referenced by query_planner().

 {
     RelOptInfo *joinrel;
 
     /* The dummy join relation should be the only one ... */
     Assert(root->join_rel_list == NIL);
 
     joinrel = makeNode(RelOptInfo);
     joinrel->reloptkind = RELOPT_JOINREL;
     joinrel->relids = NULL;     /* empty set */
     joinrel->rows = 1;          /* we produce one row for such cases */
     joinrel->rtekind = RTE_JOIN;
     joinrel->reltarget = create_empty_pathtarget();
 
     root->join_rel_list = lappend(root->join_rel_list, joinrel);
 
     return joinrel;
 }

RelOptInfo* build_join_rel	(	PlannerInfo *	root,
		Relids	joinrelids,
		RelOptInfo *	outer_rel,
		RelOptInfo *	inner_rel,
		SpecialJoinInfo *	sjinfo,
		List **	restrictlist_ptr
	)

Definition at line 446 of file relnode.c.

References add_join_rel(), add_placeholders_to_joinrel(), RelOptInfo::allvisfrac, Assert, RelOptInfo::attr_needed, RelOptInfo::attr_widths, RelOptInfo::baserestrict_min_security, RelOptInfo::baserestrictcost, RelOptInfo::baserestrictinfo, bms_copy(), bms_del_members(), bms_is_empty(), bms_num_members(), bms_union(), build_joinrel_joinlist(), build_joinrel_restrictlist(), build_joinrel_tlist(), RelOptInfo::cheapest_parameterized_paths, RelOptInfo::cheapest_startup_path, RelOptInfo::cheapest_total_path, RelOptInfo::cheapest_unique_path, RelOptInfo::consider_parallel, RelOptInfo::consider_param_startup, RelOptInfo::consider_startup, create_empty_pathtarget(), RelOptInfo::direct_lateral_relids, PathTarget::exprs, RelOptInfo::fdw_private, RelOptInfo::fdwroutine, find_join_rel(), RelOptInfo::has_eclass_joins, has_relevant_eclass_joinclause(), RelOptInfo::indexlist, InvalidOid, is_parallel_safe(), PlannerInfo::join_cur_level, PlannerInfo::join_rel_level, RelOptInfo::joininfo, lappend(), RelOptInfo::lateral_referencers, RelOptInfo::lateral_relids, RelOptInfo::lateral_vars, makeNode, RelOptInfo::max_attr, RelOptInfo::min_attr, min_join_parameterization(), NIL, RelOptInfo::non_unique_for_rels, NULL, RelOptInfo::pages, RelOptInfo::partial_pathlist, RelOptInfo::pathlist, QualCost::per_tuple, RelOptInfo::ppilist, RelOptInfo::rel_parallel_workers, RelOptInfo::relid, RelOptInfo::relids, RELOPT_JOINREL, RelOptInfo::reloptkind, RelOptInfo::reltarget, RelOptInfo::rows, RTE_JOIN, RelOptInfo::rtekind, RelOptInfo::serverid, set_foreign_rel_properties(), set_joinrel_size_estimates(), QualCost::startup, RelOptInfo::statlist, RelOptInfo::subplan_params, RelOptInfo::subroot, RelOptInfo::top_parent_relids, PlannerInfo::tuple_fraction, RelOptInfo::tuples, RelOptInfo::unique_for_rels, RelOptInfo::userid, and RelOptInfo::useridiscurrent.

Referenced by make_join_rel().

 {
     RelOptInfo *joinrel;
     List       *restrictlist;
 
     /*
      * See if we already have a joinrel for this set of base rels.
      */
     joinrel = find_join_rel(root, joinrelids);
 
     if (joinrel)
     {
         /*
          * Yes, so we only need to figure the restrictlist for this particular
          * pair of component relations.
          */
         if (restrictlist_ptr)
             *restrictlist_ptr = build_joinrel_restrictlist(root,
                                                            joinrel,
                                                            outer_rel,
                                                            inner_rel);
         return joinrel;
     }
 
     /*
      * Nope, so make one.
      */
     joinrel = makeNode(RelOptInfo);
     joinrel->reloptkind = RELOPT_JOINREL;
     joinrel->relids = bms_copy(joinrelids);
     joinrel->rows = 0;
     /* cheap startup cost is interesting iff not all tuples to be retrieved */
     joinrel->consider_startup = (root->tuple_fraction > 0);
     joinrel->consider_param_startup = false;
     joinrel->consider_parallel = false;
     joinrel->reltarget = create_empty_pathtarget();
     joinrel->pathlist = NIL;
     joinrel->ppilist = NIL;
     joinrel->partial_pathlist = NIL;
     joinrel->cheapest_startup_path = NULL;
     joinrel->cheapest_total_path = NULL;
     joinrel->cheapest_unique_path = NULL;
     joinrel->cheapest_parameterized_paths = NIL;
     /* init direct_lateral_relids from children; we'll finish it up below */
     joinrel->direct_lateral_relids =
         bms_union(outer_rel->direct_lateral_relids,
                   inner_rel->direct_lateral_relids);
     joinrel->lateral_relids = min_join_parameterization(root, joinrel->relids,
                                                         outer_rel, inner_rel);
     joinrel->relid = 0;         /* indicates not a baserel */
     joinrel->rtekind = RTE_JOIN;
     joinrel->min_attr = 0;
     joinrel->max_attr = 0;
     joinrel->attr_needed = NULL;
     joinrel->attr_widths = NULL;
     joinrel->lateral_vars = NIL;
     joinrel->lateral_referencers = NULL;
     joinrel->indexlist = NIL;
     joinrel->statlist = NIL;
     joinrel->pages = 0;
     joinrel->tuples = 0;
     joinrel->allvisfrac = 0;
     joinrel->subroot = NULL;
     joinrel->subplan_params = NIL;
     joinrel->rel_parallel_workers = -1;
     joinrel->serverid = InvalidOid;
     joinrel->userid = InvalidOid;
     joinrel->useridiscurrent = false;
     joinrel->fdwroutine = NULL;
     joinrel->fdw_private = NULL;
     joinrel->unique_for_rels = NIL;
     joinrel->non_unique_for_rels = NIL;
     joinrel->baserestrictinfo = NIL;
     joinrel->baserestrictcost.startup = 0;
     joinrel->baserestrictcost.per_tuple = 0;
     joinrel->baserestrict_min_security = UINT_MAX;
     joinrel->joininfo = NIL;
     joinrel->has_eclass_joins = false;
     joinrel->top_parent_relids = NULL;
 
     /* Compute information relevant to the foreign relations. */
     set_foreign_rel_properties(joinrel, outer_rel, inner_rel);
 
     /*
      * Create a new tlist containing just the vars that need to be output from
      * this join (ie, are needed for higher joinclauses or final output).
      *
      * NOTE: the tlist order for a join rel will depend on which pair of outer
      * and inner rels we first try to build it from.  But the contents should
      * be the same regardless.
      */
     build_joinrel_tlist(root, joinrel, outer_rel);
     build_joinrel_tlist(root, joinrel, inner_rel);
     add_placeholders_to_joinrel(root, joinrel, outer_rel, inner_rel);
 
     /*
      * add_placeholders_to_joinrel also took care of adding the ph_lateral
      * sets of any PlaceHolderVars computed here to direct_lateral_relids, so
      * now we can finish computing that.  This is much like the computation of
      * the transitively-closed lateral_relids in min_join_parameterization,
      * except that here we *do* have to consider the added PHVs.
      */
     joinrel->direct_lateral_relids =
         bms_del_members(joinrel->direct_lateral_relids, joinrel->relids);
     if (bms_is_empty(joinrel->direct_lateral_relids))
         joinrel->direct_lateral_relids = NULL;
 
     /*
      * Construct restrict and join clause lists for the new joinrel. (The
      * caller might or might not need the restrictlist, but I need it anyway
      * for set_joinrel_size_estimates().)
      */
     restrictlist = build_joinrel_restrictlist(root, joinrel,
                                               outer_rel, inner_rel);
     if (restrictlist_ptr)
         *restrictlist_ptr = restrictlist;
     build_joinrel_joinlist(joinrel, outer_rel, inner_rel);
 
     /*
      * This is also the right place to check whether the joinrel has any
      * pending EquivalenceClass joins.
      */
     joinrel->has_eclass_joins = has_relevant_eclass_joinclause(root, joinrel);
 
     /*
      * Set estimates of the joinrel's size.
      */
     set_joinrel_size_estimates(root, joinrel, outer_rel, inner_rel,
                                sjinfo, restrictlist);
 
     /*
      * Set the consider_parallel flag if this joinrel could potentially be
      * scanned within a parallel worker.  If this flag is false for either
      * inner_rel or outer_rel, then it must be false for the joinrel also.
      * Even if both are true, there might be parallel-restricted expressions
      * in the targetlist or quals.
      *
      * Note that if there are more than two rels in this relation, they could
      * be divided between inner_rel and outer_rel in any arbitrary way.  We
      * assume this doesn't matter, because we should hit all the same baserels
      * and joinclauses while building up to this joinrel no matter which we
      * take; therefore, we should make the same decision here however we get
      * here.
      */
     if (inner_rel->consider_parallel && outer_rel->consider_parallel &&
         is_parallel_safe(root, (Node *) restrictlist) &&
         is_parallel_safe(root, (Node *) joinrel->reltarget->exprs))
         joinrel->consider_parallel = true;
 
     /* Add the joinrel to the PlannerInfo. */
     add_join_rel(root, joinrel);
 
     /*
      * Also, if dynamic-programming join search is active, add the new joinrel
      * to the appropriate sublist.  Note: you might think the Assert on number
      * of members should be for equality, but some of the level 1 rels might
      * have been joinrels already, so we can only assert <=.
      */
     if (root->join_rel_level)
     {
         Assert(root->join_cur_level > 0);
         Assert(root->join_cur_level <= bms_num_members(joinrel->relids));
         root->join_rel_level[root->join_cur_level] =
             lappend(root->join_rel_level[root->join_cur_level], joinrel);
     }
 
     return joinrel;
 }

static void build_join_rel_hash ( PlannerInfo * root )

static

Definition at line 266 of file relnode.c.

References Assert, bitmap_hash(), bitmap_match(), CurrentMemoryContext, HASHCTL::entrysize, HASHCTL::hash, HASH_COMPARE, HASH_CONTEXT, hash_create(), HASH_ELEM, HASH_ENTER, HASH_FUNCTION, hash_search(), HASHCTL::hcxt, JoinHashEntry::join_rel, PlannerInfo::join_rel_hash, PlannerInfo::join_rel_list, HASHCTL::keysize, lfirst, HASHCTL::match, MemSet, and RelOptInfo::relids.

Referenced by find_join_rel().

 {
     HTAB       *hashtab;
     HASHCTL     hash_ctl;
     ListCell   *l;
 
     /* Create the hash table */
     MemSet(&hash_ctl, 0, sizeof(hash_ctl));
     hash_ctl.keysize = sizeof(Relids);
     hash_ctl.entrysize = sizeof(JoinHashEntry);
     hash_ctl.hash = bitmap_hash;
     hash_ctl.match = bitmap_match;
     hash_ctl.hcxt = CurrentMemoryContext;
     hashtab = hash_create("JoinRelHashTable",
                           256L,
                           &hash_ctl,
                           HASH_ELEM | HASH_FUNCTION | HASH_COMPARE | HASH_CONTEXT);
 
     /* Insert all the already-existing joinrels */
     foreach(l, root->join_rel_list)
     {
         RelOptInfo *rel = (RelOptInfo *) lfirst(l);
         JoinHashEntry *hentry;
         bool        found;
 
         hentry = (JoinHashEntry *) hash_search(hashtab,
                                                &(rel->relids),
                                                HASH_ENTER,
                                                &found);
         Assert(!found);
         hentry->join_rel = rel;
     }
 
     root->join_rel_hash = hashtab;
 }

static void build_joinrel_joinlist	(	RelOptInfo *	joinrel,
		RelOptInfo *	outer_rel,
		RelOptInfo *	inner_rel
	)

static

Definition at line 788 of file relnode.c.

References RelOptInfo::joininfo, NIL, result, and subbuild_joinrel_joinlist().

Referenced by build_join_rel().

 {
     List       *result;
 
     /*
      * Collect all the clauses that syntactically belong above this level,
      * eliminating any duplicates (important since we will see many of the
      * same clauses arriving from both input relations).
      */
     result = subbuild_joinrel_joinlist(joinrel, outer_rel->joininfo, NIL);
     result = subbuild_joinrel_joinlist(joinrel, inner_rel->joininfo, result);
 
     joinrel->joininfo = result;
 }

static List * build_joinrel_restrictlist	(	PlannerInfo *	root,
		RelOptInfo *	joinrel,
		RelOptInfo *	outer_rel,
		RelOptInfo *	inner_rel
	)

static

Definition at line 758 of file relnode.c.

References generate_join_implied_equalities(), RelOptInfo::joininfo, list_concat(), NIL, RelOptInfo::relids, result, and subbuild_joinrel_restrictlist().

Referenced by build_join_rel().

 {
     List       *result;
 
     /*
      * Collect all the clauses that syntactically belong at this level,
      * eliminating any duplicates (important since we will see many of the
      * same clauses arriving from both input relations).
      */
     result = subbuild_joinrel_restrictlist(joinrel, outer_rel->joininfo, NIL);
     result = subbuild_joinrel_restrictlist(joinrel, inner_rel->joininfo, result);
 
     /*
      * Add on any clauses derived from EquivalenceClasses.  These cannot be
      * redundant with the clauses in the joininfo lists, so don't bother
      * checking.
      */
     result = list_concat(result,
                          generate_join_implied_equalities(root,
                                                           joinrel->relids,
                                                           outer_rel->relids,
                                                           inner_rel));
 
     return result;
 }

static void build_joinrel_tlist	(	PlannerInfo *	root,
		RelOptInfo *	joinrel,
		RelOptInfo *	input_rel
	)

static

Definition at line 672 of file relnode.c.

References RelOptInfo::attr_needed, RelOptInfo::attr_widths, bms_nonempty_difference(), elog, ERROR, PathTarget::exprs, find_base_rel(), IsA, lappend(), lfirst, RelOptInfo::min_attr, nodeTag, RelOptInfo::relids, RelOptInfo::reltarget, Var::varattno, Var::varno, and PathTarget::width.

Referenced by build_join_rel().

 {
     Relids      relids = joinrel->relids;
     ListCell   *vars;
 
     foreach(vars, input_rel->reltarget->exprs)
     {
         Var        *var = (Var *) lfirst(vars);
         RelOptInfo *baserel;
         int         ndx;
 
         /*
          * Ignore PlaceHolderVars in the input tlists; we'll make our own
          * decisions about whether to copy them.
          */
         if (IsA(var, PlaceHolderVar))
             continue;
 
         /*
          * Otherwise, anything in a baserel or joinrel targetlist ought to be
          * a Var.  (More general cases can only appear in appendrel child
          * rels, which will never be seen here.)
          */
         if (!IsA(var, Var))
             elog(ERROR, "unexpected node type in rel targetlist: %d",
                  (int) nodeTag(var));
 
         /* Get the Var's original base rel */
         baserel = find_base_rel(root, var->varno);
 
         /* Is it still needed above this joinrel? */
         ndx = var->varattno - baserel->min_attr;
         if (bms_nonempty_difference(baserel->attr_needed[ndx], relids))
         {
             /* Yup, add it to the output */
             joinrel->reltarget->exprs = lappend(joinrel->reltarget->exprs, var);
             /* Vars have cost zero, so no need to adjust reltarget->cost */
             joinrel->reltarget->width += baserel->attr_widths[ndx];
         }
     }
 }

RelOptInfo* build_simple_rel	(	PlannerInfo *	root,
		int	relid,
		RelOptInfo *	parent
	)

Definition at line 91 of file relnode.c.

References RelOptInfo::allvisfrac, PlannerInfo::append_rel_list, Assert, RelOptInfo::attr_needed, RelOptInfo::attr_widths, RelOptInfo::baserestrict_min_security, RelOptInfo::baserestrictcost, RelOptInfo::baserestrictinfo, bms_copy(), bms_make_singleton(), build_simple_rel(), RelOptInfo::cheapest_parameterized_paths, RelOptInfo::cheapest_startup_path, RelOptInfo::cheapest_total_path, RelOptInfo::cheapest_unique_path, RangeTblEntry::checkAsUser, AppendRelInfo::child_relid, Alias::colnames, RelOptInfo::consider_parallel, RelOptInfo::consider_param_startup, RelOptInfo::consider_startup, create_empty_pathtarget(), RelOptInfo::direct_lateral_relids, elog, RangeTblEntry::eref, ERROR, RelOptInfo::fdw_private, RelOptInfo::fdwroutine, get_relation_info(), RelOptInfo::has_eclass_joins, RelOptInfo::indexlist, RangeTblEntry::inh, InvalidOid, RelOptInfo::joininfo, RelOptInfo::lateral_referencers, RelOptInfo::lateral_relids, RelOptInfo::lateral_vars, lfirst, list_length(), makeNode, Max, RelOptInfo::max_attr, RelOptInfo::min_attr, NIL, RelOptInfo::non_unique_for_rels, NULL, RelOptInfo::pages, palloc0(), AppendRelInfo::parent_relid, RelOptInfo::partial_pathlist, RelOptInfo::pathlist, QualCost::per_tuple, RelOptInfo::ppilist, PlannerInfo::qual_security_level, RelOptInfo::rel_parallel_workers, RelOptInfo::relid, RangeTblEntry::relid, RelOptInfo::relids, RELOPT_BASEREL, RELOPT_OTHER_MEMBER_REL, RelOptInfo::reloptkind, RelOptInfo::reltarget, RelOptInfo::rows, RTE_CTE, RTE_FUNCTION, RTE_NAMEDTUPLESTORE, RTE_RELATION, RTE_SUBQUERY, RTE_TABLEFUNC, RTE_VALUES, RelOptInfo::rtekind, RangeTblEntry::rtekind, RangeTblEntry::securityQuals, RelOptInfo::serverid, PlannerInfo::simple_rel_array, PlannerInfo::simple_rte_array, QualCost::startup, RelOptInfo::statlist, RelOptInfo::subplan_params, RelOptInfo::subroot, RelOptInfo::top_parent_relids, PlannerInfo::tuple_fraction, RelOptInfo::tuples, RelOptInfo::unique_for_rels, RelOptInfo::userid, and RelOptInfo::useridiscurrent.

Referenced by add_base_rels_to_query(), build_simple_rel(), plan_cluster_use_sort(), and recurse_set_operations().

 {
     RelOptInfo *rel;
     RangeTblEntry *rte;
 
     /* Rel should not exist already */
     Assert(relid > 0 && relid < root->simple_rel_array_size);
     if (root->simple_rel_array[relid] != NULL)
         elog(ERROR, "rel %d already exists", relid);
 
     /* Fetch RTE for relation */
     rte = root->simple_rte_array[relid];
     Assert(rte != NULL);
 
     rel = makeNode(RelOptInfo);
     rel->reloptkind = parent ? RELOPT_OTHER_MEMBER_REL : RELOPT_BASEREL;
     rel->relids = bms_make_singleton(relid);
     rel->rows = 0;
     /* cheap startup cost is interesting iff not all tuples to be retrieved */
     rel->consider_startup = (root->tuple_fraction > 0);
     rel->consider_param_startup = false;    /* might get changed later */
     rel->consider_parallel = false; /* might get changed later */
     rel->reltarget = create_empty_pathtarget();
     rel->pathlist = NIL;
     rel->ppilist = NIL;
     rel->partial_pathlist = NIL;
     rel->cheapest_startup_path = NULL;
     rel->cheapest_total_path = NULL;
     rel->cheapest_unique_path = NULL;
     rel->cheapest_parameterized_paths = NIL;
     rel->direct_lateral_relids = NULL;
     rel->lateral_relids = NULL;
     rel->relid = relid;
     rel->rtekind = rte->rtekind;
     /* min_attr, max_attr, attr_needed, attr_widths are set below */
     rel->lateral_vars = NIL;
     rel->lateral_referencers = NULL;
     rel->indexlist = NIL;
     rel->statlist = NIL;
     rel->pages = 0;
     rel->tuples = 0;
     rel->allvisfrac = 0;
     rel->subroot = NULL;
     rel->subplan_params = NIL;
     rel->rel_parallel_workers = -1; /* set up in get_relation_info */
     rel->serverid = InvalidOid;
     rel->userid = rte->checkAsUser;
     rel->useridiscurrent = false;
     rel->fdwroutine = NULL;
     rel->fdw_private = NULL;
     rel->unique_for_rels = NIL;
     rel->non_unique_for_rels = NIL;
     rel->baserestrictinfo = NIL;
     rel->baserestrictcost.startup = 0;
     rel->baserestrictcost.per_tuple = 0;
     rel->baserestrict_min_security = UINT_MAX;
     rel->joininfo = NIL;
     rel->has_eclass_joins = false;
 
     /*
      * Pass top parent's relids down the inheritance hierarchy. If the parent
      * has top_parent_relids set, it's a direct or an indirect child of the
      * top parent indicated by top_parent_relids. By extension this child is
      * also an indirect child of that parent.
      */
     if (parent)
     {
         if (parent->top_parent_relids)
             rel->top_parent_relids = parent->top_parent_relids;
         else
             rel->top_parent_relids = bms_copy(parent->relids);
     }
     else
         rel->top_parent_relids = NULL;
 
     /* Check type of rtable entry */
     switch (rte->rtekind)
     {
         case RTE_RELATION:
             /* Table --- retrieve statistics from the system catalogs */
             get_relation_info(root, rte->relid, rte->inh, rel);
             break;
         case RTE_SUBQUERY:
         case RTE_FUNCTION:
         case RTE_TABLEFUNC:
         case RTE_VALUES:
         case RTE_CTE:
         case RTE_NAMEDTUPLESTORE:
 
             /*
              * Subquery, function, tablefunc, or values list --- set up attr
              * range and arrays
              *
              * Note: 0 is included in range to support whole-row Vars
              */
             rel->min_attr = 0;
             rel->max_attr = list_length(rte->eref->colnames);
             rel->attr_needed = (Relids *)
                 palloc0((rel->max_attr - rel->min_attr + 1) * sizeof(Relids));
             rel->attr_widths = (int32 *)
                 palloc0((rel->max_attr - rel->min_attr + 1) * sizeof(int32));
             break;
         default:
             elog(ERROR, "unrecognized RTE kind: %d",
                  (int) rte->rtekind);
             break;
     }
 
     /* Save the finished struct in the query's simple_rel_array */
     root->simple_rel_array[relid] = rel;
 
     /*
      * This is a convenient spot at which to note whether rels participating
      * in the query have any securityQuals attached.  If so, increase
      * root->qual_security_level to ensure it's larger than the maximum
      * security level needed for securityQuals.
      */
     if (rte->securityQuals)
         root->qual_security_level = Max(root->qual_security_level,
                                         list_length(rte->securityQuals));
 
     /*
      * If this rel is an appendrel parent, recurse to build "other rel"
      * RelOptInfos for its children.  They are "other rels" because they are
      * not in the main join tree, but we will need RelOptInfos to plan access
      * to them.
      */
     if (rte->inh)
     {
         ListCell   *l;
 
         foreach(l, root->append_rel_list)
         {
             AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(l);
 
             /* append_rel_list contains all append rels; ignore others */
             if (appinfo->parent_relid != relid)
                 continue;
 
             (void) build_simple_rel(root, appinfo->child_relid,
                                     rel);
         }
     }
 
     return rel;
 }

RelOptInfo* fetch_upper_rel	(	PlannerInfo *	root,
		UpperRelationKind	kind,
		Relids	relids
	)

Definition at line 919 of file relnode.c.

References bms_copy(), bms_equal(), RelOptInfo::cheapest_parameterized_paths, RelOptInfo::cheapest_startup_path, RelOptInfo::cheapest_total_path, RelOptInfo::cheapest_unique_path, RelOptInfo::consider_parallel, RelOptInfo::consider_param_startup, RelOptInfo::consider_startup, create_empty_pathtarget(), lappend(), lfirst, makeNode, NIL, NULL, RelOptInfo::pathlist, RelOptInfo::relids, RELOPT_UPPER_REL, RelOptInfo::reloptkind, RelOptInfo::reltarget, PlannerInfo::tuple_fraction, and PlannerInfo::upper_rels.

Referenced by add_rtes_to_flat_rtable(), create_distinct_paths(), create_grouping_paths(), create_ordered_paths(), create_window_paths(), generate_nonunion_path(), generate_recursion_path(), generate_union_path(), grouping_planner(), inheritance_planner(), make_subplan(), make_union_unique(), plan_set_operations(), preprocess_minmax_aggregates(), recurse_set_operations(), set_subquery_pathlist(), set_subquery_size_estimates(), SS_process_ctes(), standard_planner(), and subquery_planner().

 {
     RelOptInfo *upperrel;
     ListCell   *lc;
 
     /*
      * For the moment, our indexing data structure is just a List for each
      * relation kind.  If we ever get so many of one kind that this stops
      * working well, we can improve it.  No code outside this function should
      * assume anything about how to find a particular upperrel.
      */
 
     /* If we already made this upperrel for the query, return it */
     foreach(lc, root->upper_rels[kind])
     {
         upperrel = (RelOptInfo *) lfirst(lc);
 
         if (bms_equal(upperrel->relids, relids))
             return upperrel;
     }
 
     upperrel = makeNode(RelOptInfo);
     upperrel->reloptkind = RELOPT_UPPER_REL;
     upperrel->relids = bms_copy(relids);
 
     /* cheap startup cost is interesting iff not all tuples to be retrieved */
     upperrel->consider_startup = (root->tuple_fraction > 0);
     upperrel->consider_param_startup = false;
     upperrel->consider_parallel = false;    /* might get changed later */
     upperrel->reltarget = create_empty_pathtarget();
     upperrel->pathlist = NIL;
     upperrel->cheapest_startup_path = NULL;
     upperrel->cheapest_total_path = NULL;
     upperrel->cheapest_unique_path = NULL;
     upperrel->cheapest_parameterized_paths = NIL;
 
     root->upper_rels[kind] = lappend(root->upper_rels[kind], upperrel);
 
     return upperrel;
 }

RelOptInfo* find_base_rel	(	PlannerInfo *	root,
		int	relid
	)

Definition at line 243 of file relnode.c.

References Assert, elog, ERROR, NULL, and PlannerInfo::simple_rel_array.

Referenced by add_join_clause_to_rels(), add_placeholders_to_base_rels(), add_vars_to_targetlist(), adjust_appendrel_attrs_multilevel(), build_joinrel_tlist(), clause_selectivity(), create_lateral_join_info(), distribute_restrictinfo_to_rels(), examine_simple_variable(), examine_variable(), finalize_plan(), find_childrel_parents(), find_join_input_rel(), find_single_rel_for_clauses(), get_foreign_key_join_selectivity(), join_is_removable(), make_rel_from_joinlist(), reduce_unique_semijoins(), remove_join_clause_from_rels(), remove_rel_from_query(), set_append_rel_size(), set_base_rel_consider_startup(), set_subquery_size_estimates(), and set_subqueryscan_references().

 {
     RelOptInfo *rel;
 
     Assert(relid > 0);
 
     if (relid < root->simple_rel_array_size)
     {
         rel = root->simple_rel_array[relid];
         if (rel)
             return rel;
     }
 
     elog(ERROR, "no relation entry for relid %d", relid);
 
     return NULL;                /* keep compiler quiet */
 }

AppendRelInfo* find_childrel_appendrelinfo	(	PlannerInfo *	root,
		RelOptInfo *	rel
	)

Definition at line 970 of file relnode.c.

References PlannerInfo::append_rel_list, Assert, AppendRelInfo::child_relid, elog, ERROR, lfirst, NULL, RelOptInfo::relid, RELOPT_OTHER_MEMBER_REL, and RelOptInfo::reloptkind.

Referenced by adjust_appendrel_attrs_multilevel(), and find_childrel_parents().

 {
     Index       relid = rel->relid;
     ListCell   *lc;
 
     /* Should only be called on child rels */
     Assert(rel->reloptkind == RELOPT_OTHER_MEMBER_REL);
 
     foreach(lc, root->append_rel_list)
     {
         AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(lc);
 
         if (appinfo->child_relid == relid)
             return appinfo;
     }
     /* should have found the entry ... */
     elog(ERROR, "child rel %d not found in append_rel_list", relid);
     return NULL;                /* not reached */
 }

Relids find_childrel_parents	(	PlannerInfo *	root,
		RelOptInfo *	rel
	)

Definition at line 1000 of file relnode.c.

References Assert, bms_add_member(), find_base_rel(), find_childrel_appendrelinfo(), NULL, AppendRelInfo::parent_relid, RELOPT_BASEREL, RELOPT_OTHER_MEMBER_REL, RelOptInfo::reloptkind, and result.

Referenced by check_index_predicates(), and generate_implied_equalities_for_column().

 {
     Relids      result = NULL;
 
     Assert(rel->reloptkind == RELOPT_OTHER_MEMBER_REL);
 
     do
     {
         AppendRelInfo *appinfo = find_childrel_appendrelinfo(root, rel);
         Index       prelid = appinfo->parent_relid;
 
         result = bms_add_member(result, prelid);
 
         /* traverse up to the parent rel, loop if it's also a child rel */
         rel = find_base_rel(root, prelid);
     } while (rel->reloptkind == RELOPT_OTHER_MEMBER_REL);
 
     Assert(rel->reloptkind == RELOPT_BASEREL);
 
     return result;
 }

RelOptInfo* find_join_rel	(	PlannerInfo *	root,
		Relids	relids
	)

Definition at line 308 of file relnode.c.

References bms_equal(), build_join_rel_hash(), HASH_FIND, hash_search(), JoinHashEntry::join_rel, PlannerInfo::join_rel_hash, PlannerInfo::join_rel_list, lfirst, list_length(), NULL, and RelOptInfo::relids.

Referenced by build_join_rel(), examine_variable(), and find_join_input_rel().

 {
     /*
      * Switch to using hash lookup when list grows "too long".  The threshold
      * is arbitrary and is known only here.
      */
     if (!root->join_rel_hash && list_length(root->join_rel_list) > 32)
         build_join_rel_hash(root);
 
     /*
      * Use either hashtable lookup or linear search, as appropriate.
      *
      * Note: the seemingly redundant hashkey variable is used to avoid taking
      * the address of relids; unless the compiler is exceedingly smart, doing
      * so would force relids out of a register and thus probably slow down the
      * list-search case.
      */
     if (root->join_rel_hash)
     {
         Relids      hashkey = relids;
         JoinHashEntry *hentry;
 
         hentry = (JoinHashEntry *) hash_search(root->join_rel_hash,
                                                &hashkey,
                                                HASH_FIND,
                                                NULL);
         if (hentry)
             return hentry->join_rel;
     }
     else
     {
         ListCell   *l;
 
         foreach(l, root->join_rel_list)
         {
             RelOptInfo *rel = (RelOptInfo *) lfirst(l);
 
             if (bms_equal(rel->relids, relids))
                 return rel;
         }
     }
 
     return NULL;
 }

ParamPathInfo* get_appendrel_parampathinfo	(	RelOptInfo *	appendrel,
		Relids	required_outer
	)

Definition at line 1334 of file relnode.c.

References Assert, bms_equal(), bms_is_empty(), bms_overlap(), lappend(), lfirst, makeNode, NIL, NULL, ParamPathInfo::ppi_clauses, ParamPathInfo::ppi_req_outer, ParamPathInfo::ppi_rows, RelOptInfo::ppilist, and RelOptInfo::relids.

Referenced by create_append_path(), and create_merge_append_path().

 {
     ParamPathInfo *ppi;
     ListCell   *lc;
 
     /* Unparameterized paths have no ParamPathInfo */
     if (bms_is_empty(required_outer))
         return NULL;
 
     Assert(!bms_overlap(appendrel->relids, required_outer));
 
     /* If we already have a PPI for this parameterization, just return it */
     foreach(lc, appendrel->ppilist)
     {
         ppi = (ParamPathInfo *) lfirst(lc);
         if (bms_equal(ppi->ppi_req_outer, required_outer))
             return ppi;
     }
 
     /* Else build the ParamPathInfo */
     ppi = makeNode(ParamPathInfo);
     ppi->ppi_req_outer = required_outer;
     ppi->ppi_rows = 0;
     ppi->ppi_clauses = NIL;
     appendrel->ppilist = lappend(appendrel->ppilist, ppi);
 
     return ppi;
 }

ParamPathInfo* get_baserel_parampathinfo	(	PlannerInfo *	root,
		RelOptInfo *	baserel,
		Relids	required_outer
	)

Definition at line 1035 of file relnode.c.

References Assert, bms_equal(), bms_is_empty(), bms_overlap(), bms_union(), generate_join_implied_equalities(), get_parameterized_baserel_size(), join_clause_is_movable_into(), RelOptInfo::joininfo, lappend(), lfirst, list_concat(), makeNode, NIL, NULL, ParamPathInfo::ppi_clauses, ParamPathInfo::ppi_req_outer, ParamPathInfo::ppi_rows, RelOptInfo::ppilist, and RelOptInfo::relids.

 {
     ParamPathInfo *ppi;
     Relids      joinrelids;
     List       *pclauses;
     double      rows;
     ListCell   *lc;
 
     /* Unparameterized paths have no ParamPathInfo */
     if (bms_is_empty(required_outer))
         return NULL;
 
     Assert(!bms_overlap(baserel->relids, required_outer));
 
     /* If we already have a PPI for this parameterization, just return it */
     foreach(lc, baserel->ppilist)
     {
         ppi = (ParamPathInfo *) lfirst(lc);
         if (bms_equal(ppi->ppi_req_outer, required_outer))
             return ppi;
     }
 
     /*
      * Identify all joinclauses that are movable to this base rel given this
      * parameterization.
      */
     joinrelids = bms_union(baserel->relids, required_outer);
     pclauses = NIL;
     foreach(lc, baserel->joininfo)
     {
         RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
 
         if (join_clause_is_movable_into(rinfo,
                                         baserel->relids,
                                         joinrelids))
             pclauses = lappend(pclauses, rinfo);
     }
 
     /*
      * Add in joinclauses generated by EquivalenceClasses, too.  (These
      * necessarily satisfy join_clause_is_movable_into.)
      */
     pclauses = list_concat(pclauses,
                            generate_join_implied_equalities(root,
                                                             joinrelids,
                                                             required_outer,
                                                             baserel));
 
     /* Estimate the number of rows returned by the parameterized scan */
     rows = get_parameterized_baserel_size(root, baserel, pclauses);
 
     /* And now we can build the ParamPathInfo */
     ppi = makeNode(ParamPathInfo);
     ppi->ppi_req_outer = required_outer;
     ppi->ppi_rows = rows;
     ppi->ppi_clauses = pclauses;
     baserel->ppilist = lappend(baserel->ppilist, ppi);
 
     return ppi;
 }

ParamPathInfo* get_joinrel_parampathinfo	(	PlannerInfo *	root,
		RelOptInfo *	joinrel,
		Path *	outer_path,
		Path *	inner_path,
		SpecialJoinInfo *	sjinfo,
		Relids	required_outer,
		List **	restrict_clauses
	)

Definition at line 1126 of file relnode.c.

References Assert, bms_equal(), bms_is_empty(), bms_overlap(), bms_union(), generate_join_implied_equalities(), generate_join_implied_equalities_for_ecs(), get_parameterized_joinrel_size(), join_clause_is_movable_into(), RelOptInfo::joininfo, lappend(), RestrictInfo::left_ec, lfirst, list_concat(), makeNode, NIL, NULL, Path::param_info, Path::parent, PATH_REQ_OUTER, ParamPathInfo::ppi_clauses, ParamPathInfo::ppi_req_outer, ParamPathInfo::ppi_rows, RelOptInfo::ppilist, RelOptInfo::relids, and RestrictInfo::right_ec.

Referenced by create_hashjoin_path(), create_mergejoin_path(), and create_nestloop_path().

 {
     ParamPathInfo *ppi;
     Relids      join_and_req;
     Relids      outer_and_req;
     Relids      inner_and_req;
     List       *pclauses;
     List       *eclauses;
     List       *dropped_ecs;
     double      rows;
     ListCell   *lc;
 
     /* Unparameterized paths have no ParamPathInfo or extra join clauses */
     if (bms_is_empty(required_outer))
         return NULL;
 
     Assert(!bms_overlap(joinrel->relids, required_outer));
 
     /*
      * Identify all joinclauses that are movable to this join rel given this
      * parameterization.  These are the clauses that are movable into this
      * join, but not movable into either input path.  Treat an unparameterized
      * input path as not accepting parameterized clauses (because it won't,
      * per the shortcut exit above), even though the joinclause movement rules
      * might allow the same clauses to be moved into a parameterized path for
      * that rel.
      */
     join_and_req = bms_union(joinrel->relids, required_outer);
     if (outer_path->param_info)
         outer_and_req = bms_union(outer_path->parent->relids,
                                   PATH_REQ_OUTER(outer_path));
     else
         outer_and_req = NULL;   /* outer path does not accept parameters */
     if (inner_path->param_info)
         inner_and_req = bms_union(inner_path->parent->relids,
                                   PATH_REQ_OUTER(inner_path));
     else
         inner_and_req = NULL;   /* inner path does not accept parameters */
 
     pclauses = NIL;
     foreach(lc, joinrel->joininfo)
     {
         RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
 
         if (join_clause_is_movable_into(rinfo,
                                         joinrel->relids,
                                         join_and_req) &&
             !join_clause_is_movable_into(rinfo,
                                          outer_path->parent->relids,
                                          outer_and_req) &&
             !join_clause_is_movable_into(rinfo,
                                          inner_path->parent->relids,
                                          inner_and_req))
             pclauses = lappend(pclauses, rinfo);
     }
 
     /* Consider joinclauses generated by EquivalenceClasses, too */
     eclauses = generate_join_implied_equalities(root,
                                                 join_and_req,
                                                 required_outer,
                                                 joinrel);
     /* We only want ones that aren't movable to lower levels */
     dropped_ecs = NIL;
     foreach(lc, eclauses)
     {
         RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
 
         /*
          * In principle, join_clause_is_movable_into() should accept anything
          * returned by generate_join_implied_equalities(); but because its
          * analysis is only approximate, sometimes it doesn't.  So we
          * currently cannot use this Assert; instead just assume it's okay to
          * apply the joinclause at this level.
          */
 #ifdef NOT_USED
         Assert(join_clause_is_movable_into(rinfo,
                                            joinrel->relids,
                                            join_and_req));
 #endif
         if (join_clause_is_movable_into(rinfo,
                                         outer_path->parent->relids,
                                         outer_and_req))
             continue;           /* drop if movable into LHS */
         if (join_clause_is_movable_into(rinfo,
                                         inner_path->parent->relids,
                                         inner_and_req))
         {
             /* drop if movable into RHS, but remember EC for use below */
             Assert(rinfo->left_ec == rinfo->right_ec);
             dropped_ecs = lappend(dropped_ecs, rinfo->left_ec);
             continue;
         }
         pclauses = lappend(pclauses, rinfo);
     }
 
     /*
      * EquivalenceClasses are harder to deal with than we could wish, because
      * of the fact that a given EC can generate different clauses depending on
      * context.  Suppose we have an EC {X.X, Y.Y, Z.Z} where X and Y are the
      * LHS and RHS of the current join and Z is in required_outer, and further
      * suppose that the inner_path is parameterized by both X and Z.  The code
      * above will have produced either Z.Z = X.X or Z.Z = Y.Y from that EC,
      * and in the latter case will have discarded it as being movable into the
      * RHS.  However, the EC machinery might have produced either Y.Y = X.X or
      * Y.Y = Z.Z as the EC enforcement clause within the inner_path; it will
      * not have produced both, and we can't readily tell from here which one
      * it did pick.  If we add no clause to this join, we'll end up with
      * insufficient enforcement of the EC; either Z.Z or X.X will fail to be
      * constrained to be equal to the other members of the EC.  (When we come
      * to join Z to this X/Y path, we will certainly drop whichever EC clause
      * is generated at that join, so this omission won't get fixed later.)
      *
      * To handle this, for each EC we discarded such a clause from, try to
      * generate a clause connecting the required_outer rels to the join's LHS
      * ("Z.Z = X.X" in the terms of the above example).  If successful, and if
      * the clause can't be moved to the LHS, add it to the current join's
      * restriction clauses.  (If an EC cannot generate such a clause then it
      * has nothing that needs to be enforced here, while if the clause can be
      * moved into the LHS then it should have been enforced within that path.)
      *
      * Note that we don't need similar processing for ECs whose clause was
      * considered to be movable into the LHS, because the LHS can't refer to
      * the RHS so there is no comparable ambiguity about what it might
      * actually be enforcing internally.
      */
     if (dropped_ecs)
     {
         Relids      real_outer_and_req;
 
         real_outer_and_req = bms_union(outer_path->parent->relids,
                                        required_outer);
         eclauses =
             generate_join_implied_equalities_for_ecs(root,
                                                      dropped_ecs,
                                                      real_outer_and_req,
                                                      required_outer,
                                                      outer_path->parent);
         foreach(lc, eclauses)
         {
             RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
 
             /* As above, can't quite assert this here */
 #ifdef NOT_USED
             Assert(join_clause_is_movable_into(rinfo,
                                                outer_path->parent->relids,
                                                real_outer_and_req));
 #endif
             if (!join_clause_is_movable_into(rinfo,
                                              outer_path->parent->relids,
                                              outer_and_req))
                 pclauses = lappend(pclauses, rinfo);
         }
     }
 
     /*
      * Now, attach the identified moved-down clauses to the caller's
      * restrict_clauses list.  By using list_concat in this order, we leave
      * the original list structure of restrict_clauses undamaged.
      */
     *restrict_clauses = list_concat(pclauses, *restrict_clauses);
 
     /* If we already have a PPI for this parameterization, just return it */
     foreach(lc, joinrel->ppilist)
     {
         ppi = (ParamPathInfo *) lfirst(lc);
         if (bms_equal(ppi->ppi_req_outer, required_outer))
             return ppi;
     }
 
     /* Estimate the number of rows returned by the parameterized join */
     rows = get_parameterized_joinrel_size(root, joinrel,
                                           outer_path,
                                           inner_path,
                                           sjinfo,
                                           *restrict_clauses);
 
     /*
      * And now we can build the ParamPathInfo.  No point in saving the
      * input-pair-dependent clause list, though.
      *
      * Note: in GEQO mode, we'll be called in a temporary memory context, but
      * the joinrel structure is there too, so no problem.
      */
     ppi = makeNode(ParamPathInfo);
     ppi->ppi_req_outer = required_outer;
     ppi->ppi_rows = rows;
     ppi->ppi_clauses = NIL;
     joinrel->ppilist = lappend(joinrel->ppilist, ppi);
 
     return ppi;
 }

Relids min_join_parameterization	(	PlannerInfo *	root,
		Relids	joinrelids,
		RelOptInfo *	outer_rel,
		RelOptInfo *	inner_rel
	)

Definition at line 629 of file relnode.c.

References bms_del_members(), bms_is_empty(), bms_union(), RelOptInfo::lateral_relids, NULL, and result.

Referenced by build_join_rel(), and join_is_legal().

 {
     Relids      result;
 
     /*
      * Basically we just need the union of the inputs' lateral_relids, less
      * whatever is already in the join.
      *
      * It's not immediately obvious that this is a valid way to compute the
      * result, because it might seem that we're ignoring possible lateral refs
      * of PlaceHolderVars that are due to be computed at the join but not in
      * either input.  However, because create_lateral_join_info() already
      * charged all such PHV refs to each member baserel of the join, they'll
      * be accounted for already in the inputs' lateral_relids.  Likewise, we
      * do not need to worry about doing transitive closure here, because that
      * was already accounted for in the original baserel lateral_relids.
      */
     result = bms_union(outer_rel->lateral_relids, inner_rel->lateral_relids);
     result = bms_del_members(result, joinrelids);
 
     /* Maintain invariant that result is exactly NULL if empty */
     if (bms_is_empty(result))
         result = NULL;
 
     return result;
 }

static void set_foreign_rel_properties	(	RelOptInfo *	joinrel,
		RelOptInfo *	outer_rel,
		RelOptInfo *	inner_rel
	)

static

Definition at line 371 of file relnode.c.

References RelOptInfo::fdwroutine, GetUserId(), OidIsValid, RelOptInfo::serverid, RelOptInfo::userid, and RelOptInfo::useridiscurrent.

Referenced by build_join_rel().

 {
     if (OidIsValid(outer_rel->serverid) &&
         inner_rel->serverid == outer_rel->serverid)
     {
         if (inner_rel->userid == outer_rel->userid)
         {
             joinrel->serverid = outer_rel->serverid;
             joinrel->userid = outer_rel->userid;
             joinrel->useridiscurrent = outer_rel->useridiscurrent || inner_rel->useridiscurrent;
             joinrel->fdwroutine = outer_rel->fdwroutine;
         }
         else if (!OidIsValid(inner_rel->userid) &&
                  outer_rel->userid == GetUserId())
         {
             joinrel->serverid = outer_rel->serverid;
             joinrel->userid = outer_rel->userid;
             joinrel->useridiscurrent = true;
             joinrel->fdwroutine = outer_rel->fdwroutine;
         }
         else if (!OidIsValid(outer_rel->userid) &&
                  inner_rel->userid == GetUserId())
         {
             joinrel->serverid = outer_rel->serverid;
             joinrel->userid = inner_rel->userid;
             joinrel->useridiscurrent = true;
             joinrel->fdwroutine = outer_rel->fdwroutine;
         }
     }
 }

void setup_simple_rel_arrays ( PlannerInfo * root )

Definition at line 62 of file relnode.c.

References lfirst, list_length(), palloc0(), PlannerInfo::parse, Query::rtable, PlannerInfo::simple_rel_array, PlannerInfo::simple_rel_array_size, and PlannerInfo::simple_rte_array.

Referenced by plan_cluster_use_sort(), plan_set_operations(), and query_planner().

 {
     Index       rti;
     ListCell   *lc;
 
     /* Arrays are accessed using RT indexes (1..N) */
     root->simple_rel_array_size = list_length(root->parse->rtable) + 1;
 
     /* simple_rel_array is initialized to all NULLs */
     root->simple_rel_array = (RelOptInfo **)
         palloc0(root->simple_rel_array_size * sizeof(RelOptInfo *));
 
     /* simple_rte_array is an array equivalent of the rtable list */
     root->simple_rte_array = (RangeTblEntry **)
         palloc0(root->simple_rel_array_size * sizeof(RangeTblEntry *));
     rti = 1;
     foreach(lc, root->parse->rtable)
     {
         RangeTblEntry *rte = (RangeTblEntry *) lfirst(lc);
 
         root->simple_rte_array[rti++] = rte;
     }
 }

static List * subbuild_joinrel_joinlist	(	RelOptInfo *	joinrel,
		List *	joininfo_list,
		List *	new_joininfo
	)

static

Definition at line 840 of file relnode.c.

References bms_is_subset(), lfirst, list_append_unique_ptr(), RelOptInfo::relids, and RestrictInfo::required_relids.

Referenced by build_joinrel_joinlist().

 {
     ListCell   *l;
 
     foreach(l, joininfo_list)
     {
         RestrictInfo *rinfo = (RestrictInfo *) lfirst(l);
 
         if (bms_is_subset(rinfo->required_relids, joinrel->relids))
         {
             /*
              * This clause becomes a restriction clause for the joinrel, since
              * it refers to no outside rels.  So we can ignore it in this
              * routine.
              */
         }
         else
         {
             /*
              * This clause is still a join clause at this level, so add it to
              * the new joininfo list, being careful to eliminate duplicates.
              * (Since RestrictInfo nodes in different joinlists will have been
              * multiply-linked rather than copied, pointer equality should be
              * a sufficient test.)
              */
             new_joininfo = list_append_unique_ptr(new_joininfo, rinfo);
         }
     }
 
     return new_joininfo;
 }

static List * subbuild_joinrel_restrictlist	(	RelOptInfo *	joinrel,
		List *	joininfo_list,
		List *	new_restrictlist
	)

static

Definition at line 806 of file relnode.c.

References bms_is_subset(), lfirst, list_append_unique_ptr(), RelOptInfo::relids, and RestrictInfo::required_relids.

Referenced by build_joinrel_restrictlist().

 {
     ListCell   *l;
 
     foreach(l, joininfo_list)
     {
         RestrictInfo *rinfo = (RestrictInfo *) lfirst(l);
 
         if (bms_is_subset(rinfo->required_relids, joinrel->relids))
         {
             /*
              * This clause becomes a restriction clause for the joinrel, since
              * it refers to no outside rels.  Add it to the list, being
              * careful to eliminate duplicates. (Since RestrictInfo nodes in
              * different joinlists will have been multiply-linked rather than
              * copied, pointer equality should be a sufficient test.)
              */
             new_restrictlist = list_append_unique_ptr(new_restrictlist, rinfo);
         }
         else
         {
             /*
              * This clause is still a join clause at this level, so we ignore
              * it in this routine.
              */
         }
     }
 
     return new_restrictlist;
 }

Data Structures

Typedefs

Functions

Typedef Documentation

Function Documentation