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Associate partitioning information with each RelOptInfo.

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This is not used for anything yet, but it is necessary infrastructure
for partition-wise join and for partition pruning without constraint
exclusion.

Ashutosh Bapat, reviewed by Amit Langote and with quite a few changes,
mostly cosmetic, by me.  Additional review and testing of this patch
series by Antonin Houska, Amit Khandekar, Rafia Sabih, Rajkumar
Raghuwanshi, Thomas Munro, and Dilip Kumar.

Discussion: http://postgr.es/m/CAFjFpRfneFG3H+F6BaiXemMrKF+FY-POpx3Ocy+RiH3yBmXSNw@mail.gmail.com
This commit is contained in:
Robert Haas
2017-09-20 23:33:04 -04:00
parent 7b86c2ac95
commit 9140cf8269
3 changed files with 249 additions and 3 deletions
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37
src/backend/optimizer/util/relnode.c
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@ -146,6 +146,11 @@ build_simple_rel(PlannerInfo *root, int relid, RelOptInfo *parent)
rel->baserestrict_min_security = UINT_MAX;
rel->joininfo = NIL;
rel->has_eclass_joins = false;
rel->part_scheme = NULL;
rel->nparts = 0;
rel->boundinfo = NULL;
rel->part_rels = NULL;
rel->partexprs = NULL;
/*
* Pass top parent's relids down the inheritance hierarchy. If the parent
@ -218,18 +223,41 @@ build_simple_rel(PlannerInfo *root, int relid, RelOptInfo *parent)
if (rte->inh)
{
ListCell *l;
int nparts = rel->nparts;
int cnt_parts = 0;
if (nparts > 0)
rel->part_rels = (RelOptInfo **)
palloc(sizeof(RelOptInfo *) * nparts);
foreach(l, root->append_rel_list)
{
AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(l);
RelOptInfo *childrel;
/* append_rel_list contains all append rels; ignore others */
if (appinfo->parent_relid != relid)
continue;
(void) build_simple_rel(root, appinfo->child_relid,
rel);
childrel = build_simple_rel(root, appinfo->child_relid,
rel);
/* Nothing more to do for an unpartitioned table. */
if (!rel->part_scheme)
continue;
/*
* The order of partition OIDs in append_rel_list is the same as
* the order in the PartitionDesc, so the order of part_rels will
* also match the PartitionDesc. See expand_partitioned_rtentry.
*/
Assert(cnt_parts < nparts);
rel->part_rels[cnt_parts] = childrel;
cnt_parts++;
}
/* We should have seen all the child partitions. */
Assert(cnt_parts == nparts);
}
return rel;
@ -527,6 +555,11 @@ build_join_rel(PlannerInfo *root,
joinrel->joininfo = NIL;
joinrel->has_eclass_joins = false;
joinrel->top_parent_relids = NULL;
joinrel->part_scheme = NULL;
joinrel->nparts = 0;
joinrel->boundinfo = NULL;
joinrel->part_rels = NULL;
joinrel->partexprs = NULL;
/* Compute information relevant to the foreign relations. */
set_foreign_rel_properties(joinrel, outer_rel, inner_rel);