diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/optimizer/plan/planner.c | 10 | ||||
| -rw-r--r-- | src/include/nodes/pathnodes.h | 18 |
2 files changed, 26 insertions, 2 deletions
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c index 3a1b846217..c430189572 100644 --- a/src/backend/optimizer/plan/planner.c +++ b/src/backend/optimizer/plan/planner.c @@ -1830,6 +1830,7 @@ grouping_planner(PlannerInfo *root, bool inheritance_update, bool final_target_parallel_safe; RelOptInfo *current_rel; RelOptInfo *final_rel; + FinalPathExtraData extra; ListCell *lc; /* Tweak caller-supplied tuple_fraction if have LIMIT/OFFSET */ @@ -2389,6 +2390,11 @@ grouping_planner(PlannerInfo *root, bool inheritance_update, } } + extra.limit_needed = limit_needed(parse); + extra.limit_tuples = limit_tuples; + extra.count_est = count_est; + extra.offset_est = offset_est; + /* * If there is an FDW that's responsible for all baserels of the query, * let it consider adding ForeignPaths. @@ -2397,12 +2403,12 @@ grouping_planner(PlannerInfo *root, bool inheritance_update, final_rel->fdwroutine->GetForeignUpperPaths) final_rel->fdwroutine->GetForeignUpperPaths(root, UPPERREL_FINAL, current_rel, final_rel, - NULL); + &extra); /* Let extensions possibly add some more paths */ if (create_upper_paths_hook) (*create_upper_paths_hook) (root, UPPERREL_FINAL, - current_rel, final_rel, NULL); + current_rel, final_rel, &extra); /* Note: currently, we leave it to callers to do set_cheapest() */ } diff --git a/src/include/nodes/pathnodes.h b/src/include/nodes/pathnodes.h index 88c8973f3c..15314a8cfe 100644 --- a/src/include/nodes/pathnodes.h +++ b/src/include/nodes/pathnodes.h @@ -2440,6 +2440,24 @@ typedef struct } GroupPathExtraData; /* + * Struct for extra information passed to subroutines of grouping_planner + * + * limit_needed is true if we actually need a Limit plan node + * limit_tuples is an estimated bound on the number of output tuples, + * or -1 if no LIMIT or couldn't estimate + * count_est and offset_est are the estimated values of the LIMIT and OFFSET + * expressions computed by preprocess_limit() (see comments for + * preprocess_limit() for more information). + */ +typedef struct +{ + bool limit_needed; + double limit_tuples; + int64 count_est; + int64 offset_est; +} FinalPathExtraData; + +/* * For speed reasons, cost estimation for join paths is performed in two * phases: the first phase tries to quickly derive a lower bound for the * join cost, and then we check if that's sufficient to reject the path. |