diff options
Diffstat (limited to 'src/backend/optimizer/plan/planmain.c')
| -rw-r--r-- | src/backend/optimizer/plan/planmain.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/backend/optimizer/plan/planmain.c b/src/backend/optimizer/plan/planmain.c index cab6e9e25ad..9e6b0b724c1 100644 --- a/src/backend/optimizer/plan/planmain.c +++ b/src/backend/optimizer/plan/planmain.c @@ -101,8 +101,9 @@ query_planner(PlannerInfo *root, List *tlist, ListCell *lc; double total_pages; - /* Make tuple_fraction accessible to lower-level routines */ + /* Make tuple_fraction, limit_tuples accessible to lower-level routines */ root->tuple_fraction = tuple_fraction; + root->limit_tuples = limit_tuples; *num_groups = 1; /* default result */ @@ -315,6 +316,9 @@ query_planner(PlannerInfo *root, List *tlist, !pathkeys_contained_in(root->distinct_pathkeys, root->group_pathkeys) || !pathkeys_contained_in(root->window_pathkeys, root->group_pathkeys)) tuple_fraction = 0.0; + + /* In any case, limit_tuples shouldn't be specified here */ + Assert(limit_tuples < 0); } else if (parse->hasAggs || root->hasHavingQual) { @@ -323,6 +327,9 @@ query_planner(PlannerInfo *root, List *tlist, * it will deliver a single result row (so leave *num_groups 1). */ tuple_fraction = 0.0; + + /* limit_tuples shouldn't be specified here */ + Assert(limit_tuples < 0); } else if (parse->distinctClause) { @@ -347,6 +354,9 @@ query_planner(PlannerInfo *root, List *tlist, */ if (tuple_fraction >= 1.0) tuple_fraction /= *num_groups; + + /* limit_tuples shouldn't be specified here */ + Assert(limit_tuples < 0); } else { |