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Diffstat (limited to 'src/test/regress/expected/join.out')
-rw-r--r-- | src/test/regress/expected/join.out | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/regress/expected/join.out b/src/test/regress/expected/join.out index c3bb4fe767f..eafc933e8f5 100644 --- a/src/test/regress/expected/join.out +++ b/src/test/regress/expected/join.out @@ -5323,3 +5323,38 @@ ERROR: invalid reference to FROM-clause entry for table "xx1" LINE 1: ...xx1 using lateral (select * from int4_tbl where f1 = x1) ss; ^ HINT: There is an entry for table "xx1", but it cannot be referenced from this part of the query. +-- +-- test that foreign key join estimation performs sanely for outer joins +-- +begin; +create table fkest (a int, b int, c int unique, primary key(a,b)); +create table fkest1 (a int, b int, primary key(a,b)); +insert into fkest select x/10, x%10, x from generate_series(1,1000) x; +insert into fkest1 select x/10, x%10 from generate_series(1,1000) x; +alter table fkest1 + add constraint fkest1_a_b_fkey foreign key (a,b) references fkest; +analyze fkest; +analyze fkest1; +explain (costs off) +select * +from fkest f + left join fkest1 f1 on f.a = f1.a and f.b = f1.b + left join fkest1 f2 on f.a = f2.a and f.b = f2.b + left join fkest1 f3 on f.a = f3.a and f.b = f3.b +where f.c = 1; + QUERY PLAN +------------------------------------------------------------------ + Nested Loop Left Join + -> Nested Loop Left Join + -> Nested Loop Left Join + -> Index Scan using fkest_c_key on fkest f + Index Cond: (c = 1) + -> Index Only Scan using fkest1_pkey on fkest1 f1 + Index Cond: ((a = f.a) AND (b = f.b)) + -> Index Only Scan using fkest1_pkey on fkest1 f2 + Index Cond: ((a = f.a) AND (b = f.b)) + -> Index Only Scan using fkest1_pkey on fkest1 f3 + Index Cond: ((a = f.a) AND (b = f.b)) +(11 rows) + +rollback; |