diff options
Diffstat (limited to 'src/backend/optimizer/path/joinrels.c')
| -rw-r--r-- | src/backend/optimizer/path/joinrels.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/src/backend/optimizer/path/joinrels.c b/src/backend/optimizer/path/joinrels.c index 4a35d8d3a48..2ad0b969d25 100644 --- a/src/backend/optimizer/path/joinrels.c +++ b/src/backend/optimizer/path/joinrels.c @@ -88,13 +88,9 @@ join_search_one_level(PlannerInfo *root, int level) has_join_restriction(root, old_rel)) { /* - * Note that if all available join clauses for this rel require - * more than one other rel, we will fail to make any joins against - * it here. In most cases that's OK; it'll be considered by - * "bushy plan" join code in a higher-level pass where we have - * those other rels collected into a join rel. - * - * See also the last-ditch case below. + * There are relevant join clauses or join order restrictions, + * so consider joins between this rel and (only) those rels it is + * linked to by a clause or restriction. */ make_rels_by_clause_joins(root, old_rel, @@ -160,8 +156,8 @@ join_search_one_level(PlannerInfo *root, int level) { /* * OK, we can build a rel of the right level from this - * pair of rels. Do so if there is at least one usable - * join clause or a relevant join restriction. + * pair of rels. Do so if there is at least one relevant + * join clause or join order restriction. */ if (have_relevant_joinclause(root, old_rel, new_rel) || have_join_order_restriction(root, old_rel, new_rel)) |