diff options
Diffstat (limited to 'src/backend/optimizer/path/allpaths.c')
| -rw-r--r-- | src/backend/optimizer/path/allpaths.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/backend/optimizer/path/allpaths.c b/src/backend/optimizer/path/allpaths.c index a1e1a87c293..343b35aa326 100644 --- a/src/backend/optimizer/path/allpaths.c +++ b/src/backend/optimizer/path/allpaths.c @@ -111,6 +111,8 @@ static void set_tablefunc_pathlist(PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte); static void set_cte_pathlist(PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte); +static void set_namedtuplestore_pathlist(PlannerInfo *root, RelOptInfo *rel, + RangeTblEntry *rte); static void set_worktable_pathlist(PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte); static RelOptInfo *make_rel_from_joinlist(PlannerInfo *root, List *joinlist); @@ -396,6 +398,9 @@ set_rel_size(PlannerInfo *root, RelOptInfo *rel, else set_cte_pathlist(root, rel, rte); break; + case RTE_NAMEDTUPLESTORE: + set_namedtuplestore_pathlist(root, rel, rte); + break; default: elog(ERROR, "unexpected rtekind: %d", (int) rel->rtekind); break; @@ -464,6 +469,9 @@ set_rel_pathlist(PlannerInfo *root, RelOptInfo *rel, case RTE_CTE: /* CTE reference --- fully handled during set_rel_size */ break; + case RTE_NAMEDTUPLESTORE: + /* tuplestore reference --- fully handled during set_rel_size */ + break; default: elog(ERROR, "unexpected rtekind: %d", (int) rel->rtekind); break; @@ -639,6 +647,13 @@ set_rel_consider_parallel(PlannerInfo *root, RelOptInfo *rel, * executed only once. */ return; + + case RTE_NAMEDTUPLESTORE: + /* + * tuplestore cannot be shared, at least without more + * infrastructure to support that. + */ + return; } /* @@ -2090,6 +2105,36 @@ set_cte_pathlist(PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte) } /* + * set_namedtuplestore_pathlist + * Build the (single) access path for a named tuplestore RTE + * + * There's no need for a separate set_namedtuplestore_size phase, since we + * don't support join-qual-parameterized paths for tuplestores. + */ +static void +set_namedtuplestore_pathlist(PlannerInfo *root, RelOptInfo *rel, + RangeTblEntry *rte) +{ + Relids required_outer; + + /* Mark rel with estimated output rows, width, etc */ + set_namedtuplestore_size_estimates(root, rel); + + /* + * We don't support pushing join clauses into the quals of a tuplestore + * scan, but it could still have required parameterization due to LATERAL + * refs in its tlist. + */ + required_outer = rel->lateral_relids; + + /* Generate appropriate path */ + add_path(rel, create_namedtuplestorescan_path(root, rel, required_outer)); + + /* Select cheapest path (pretty easy in this case...) */ + set_cheapest(rel); +} + +/* * set_worktable_pathlist * Build the (single) access path for a self-reference CTE RTE * |