LOAD 'pg_hint_plan'; SET pg_hint_plan.enable_hint TO on; SET pg_hint_plan.debug_print TO on; SET client_min_messages TO LOG; SET search_path TO public; SET max_parallel_workers_per_gather TO 0; EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) ---- ---- No. J-1-1 specified pattern of the object name ---- -- No. J-1-1-1 /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) -- No. J-1-1-2 /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1 t_1, s1.t2 t_2 WHERE t_1.c1 = t_2.c1; LOG: pg_hint_plan: used hint: not used hint: HashJoin(t1 t2) duplication hint: error hint: QUERY PLAN ---------------------------------------- Merge Join Merge Cond: (t_1.c1 = t_2.c1) -> Index Scan using t1_i1 on t1 t_1 -> Sort Sort Key: t_2.c1 -> Seq Scan on t2 t_2 (6 rows) -- No. J-1-1-3 /*+HashJoin(t_1 t_2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1 t_1, s1.t2 t_2 WHERE t_1.c1 = t_2.c1; LOG: pg_hint_plan: used hint: HashJoin(t_1 t_2) not used hint: duplication hint: error hint: QUERY PLAN -------------------------------- Hash Join Hash Cond: (t_1.c1 = t_2.c1) -> Seq Scan on t1 t_1 -> Hash -> Seq Scan on t2 t_2 (5 rows) ---- ---- No. J-1-2 specified schema name in the hint option ---- -- No. J-1-2-1 /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) -- No. J-1-2-2 /*+HashJoin(s1.t1 s1.t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: not used hint: HashJoin(s1.t1 s1.t2) duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) ---- ---- No. J-1-3 table doesn't exist in the hint option ---- -- No. J-1-3-1 /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) -- No. J-1-3-2 /*+HashJoin(t3 t4)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: not used hint: HashJoin(t3 t4) duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) ---- ---- No. J-1-4 conflict table name ---- -- No. J-1-4-1 /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) -- No. J-1-4-2 EXPLAIN (COSTS false) SELECT * FROM s1.t1, s2.t1 WHERE s1.t1.c1 = s2.t1.c1; QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t1_1.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t1_1.c1 -> Seq Scan on t1 t1_1 (6 rows) /*+HashJoin(t1 t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s2.t1 WHERE s1.t1.c1 = s2.t1.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t1)" DETAIL: Relation name "t1" is ambiguous. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: HashJoin(t1 t1) QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t1_1.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t1_1.c1 -> Seq Scan on t1 t1_1 (6 rows) /*+HashJoin(s1.t1 s2.t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s2.t1 WHERE s1.t1.c1 = s2.t1.c1; LOG: pg_hint_plan: used hint: not used hint: HashJoin(s1.t1 s2.t1) duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t1_1.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t1_1.c1 -> Seq Scan on t1 t1_1 (6 rows) EXPLAIN (COSTS false) SELECT * FROM s1.t1, s2.t1 s2t1 WHERE s1.t1.c1 = s2t1.c1; QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = s2t1.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: s2t1.c1 -> Seq Scan on t1 s2t1 (6 rows) /*+HashJoin(t1 s2t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s2.t1 s2t1 WHERE s1.t1.c1 = s2t1.c1; LOG: pg_hint_plan: used hint: HashJoin(s2t1 t1) not used hint: duplication hint: error hint: QUERY PLAN --------------------------------- Hash Join Hash Cond: (t1.c1 = s2t1.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t1 s2t1 (5 rows) -- No. J-1-4-3 EXPLAIN (COSTS false) SELECT *, (SELECT max(t1.c1) FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1) FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) InitPlan 1 (returns $0) -> Aggregate -> Merge Join Merge Cond: (t1_1.c1 = t2_1.c1) -> Index Only Scan using t1_i1 on t1 t1_1 -> Sort Sort Key: t2_1.c1 -> Seq Scan on t2 t2_1 -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (14 rows) /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT *, (SELECT max(t1.c1) FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1) FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) InitPlan 1 (returns $0) -> Aggregate -> Hash Join Hash Cond: (t1_1.c1 = t2_1.c1) -> Seq Scan on t1 t1_1 -> Hash -> Seq Scan on t2 t2_1 -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (12 rows) /*+NestLoop(st1 st2)HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT *, (SELECT max(st1.c1) FROM s1.t1 st1, s1.t2 st2 WHERE st1.c1 = st2.c1) FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(st1 st2) HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------- Hash Join Hash Cond: (t1.c1 = t2.c1) InitPlan 1 (returns $1) -> Aggregate -> Nested Loop -> Seq Scan on t2 st2 -> Index Only Scan using t1_i1 on t1 st1 Index Cond: (c1 = st2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (11 rows) ---- ---- No. J-1-5 conflict table name ---- -- No. J-1-5-1 /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) -- No. J-1-5-2 /*+HashJoin(t1 t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t1)" DETAIL: Relation name "t1" is duplicated. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: HashJoin(t1 t1) QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) -- No. J-1-5-3 /*+HashJoin(t1 t1)HashJoin(t2 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t1)HashJoin(t2 t2)" DETAIL: Relation name "t1" is duplicated. INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t2 t2)" DETAIL: Relation name "t2" is duplicated. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: HashJoin(t1 t1) HashJoin(t2 t2) QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1; QUERY PLAN ------------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Merge Join Merge Cond: (t1.c1 = t3.c1) -> Index Scan using t1_i1 on t1 -> Index Scan using t3_i1 on t3 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (9 rows) /*+HashJoin(t1 t2 t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t2 t1 t2)" DETAIL: Relation name "t1" is duplicated. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: HashJoin(t1 t1 t2 t2) QUERY PLAN ------------------------------------------------ Nested Loop -> Merge Join Merge Cond: (t1.c1 = t2.c1) -> Merge Join Merge Cond: (t1.c1 = t3.c1) -> Index Scan using t1_i1 on t1 -> Index Scan using t3_i1 on t3 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 -> Index Scan using t4_i1 on t4 Index Cond: (c1 = t1.c1) (12 rows) ---- ---- No. J-1-6 object type for the hint ---- -- No. J-1-6-1 /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) -- No. J-1-6-2 EXPLAIN (COSTS false) SELECT * FROM s1.p1 t1, s1.p1 t2 WHERE t1.c1 = t2.c1; QUERY PLAN ----------------------------------------- Hash Join Hash Cond: (t1.c1 = t2.c1) -> Append -> Seq Scan on p1 t1 -> Seq Scan on p1c1 t1_1 -> Seq Scan on p1c2 t1_2 -> Seq Scan on p1c3 t1_3 -> Hash -> Append -> Seq Scan on p1 t2 -> Seq Scan on p1c1 t2_1 -> Seq Scan on p1c2 t2_2 -> Seq Scan on p1c3 t2_3 (13 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.p1 t1, s1.p1 t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN -------------------------------------------------- Nested Loop -> Append -> Seq Scan on p1 t1 -> Seq Scan on p1c1 t1_1 -> Seq Scan on p1c2 t1_2 -> Seq Scan on p1c3 t1_3 -> Append -> Seq Scan on p1 t2 Filter: (t1.c1 = c1) -> Index Scan using p1c1_i on p1c1 t2_1 Index Cond: (c1 = t1.c1) -> Index Scan using p1c2_i on p1c2 t2_2 Index Cond: (c1 = t1.c1) -> Index Scan using p1c3_i on p1c3 t2_3 Index Cond: (c1 = t1.c1) (15 rows) -- No. J-1-6-3 EXPLAIN (COSTS false) SELECT * FROM s1.ul1 t1, s1.ul1 t2 WHERE t1.c1 = t2.c1; QUERY PLAN -------------------------------- Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on ul1 t1 -> Hash -> Seq Scan on ul1 t2 (5 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.ul1 t1, s1.ul1 t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------- Nested Loop -> Seq Scan on ul1 t1 -> Index Scan using ul1_pkey on ul1 t2 Index Cond: (c1 = t1.c1) (4 rows) -- No. J-1-6-4 CREATE TEMP TABLE tm1 (LIKE s1.t1 INCLUDING ALL); EXPLAIN (COSTS false) SELECT * FROM tm1 t1, tm1 t2 WHERE t1.c1 = t2.c1; QUERY PLAN -------------------------------- Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on tm1 t1 -> Hash -> Seq Scan on tm1 t2 (5 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM tm1 t1, tm1 t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------- Nested Loop -> Seq Scan on tm1 t1 -> Index Scan using tm1_pkey on tm1 t2 Index Cond: (c1 = t1.c1) (4 rows) -- No. J-1-6-5 EXPLAIN (COSTS false) SELECT * FROM pg_catalog.pg_class t1, pg_catalog.pg_class t2 WHERE t1.oid = t2.oid; QUERY PLAN ------------------------------------- Hash Join Hash Cond: (t1.oid = t2.oid) -> Seq Scan on pg_class t1 -> Hash -> Seq Scan on pg_class t2 (5 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM pg_catalog.pg_class t1, pg_catalog.pg_class t2 WHERE t1.oid = t2.oid; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ---------------------------------------------------------- Nested Loop -> Seq Scan on pg_class t1 -> Index Scan using pg_class_oid_index on pg_class t2 Index Cond: (oid = t1.oid) (4 rows) -- No. J-1-6-6 -- refer ut-fdw.sql -- No. J-1-6-7 EXPLAIN (COSTS false) SELECT * FROM s1.f1() t1, s1.f1() t2 WHERE t1.c1 = t2.c1; QUERY PLAN -------------------------------- Nested Loop Join Filter: (t1.c1 = t2.c1) -> Function Scan on f1 t1 -> Function Scan on f1 t2 (4 rows) /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.f1() t1, s1.f1() t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Function Scan on f1 t1 -> Hash -> Function Scan on f1 t2 (5 rows) -- No. J-1-6-8 EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3')) AS t1 (c1, c2, c3, c4), s1.t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------------- Hash Join Hash Cond: (t2.c1 = "*VALUES*".column1) -> Seq Scan on t2 -> Hash -> Values Scan on "*VALUES*" (5 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3')) AS t1 (c1, c2, c3, c4), s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: not used hint: NestLoop(t1 t2) duplication hint: error hint: QUERY PLAN ------------------------------------------- Hash Join Hash Cond: (t2.c1 = "*VALUES*".column1) -> Seq Scan on t2 -> Hash -> Values Scan on "*VALUES*" (5 rows) /*+NestLoop(*VALUES* t2)*/ EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3')) AS t1 (c1, c2, c3, c4), s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(*VALUES* t2) not used hint: duplication hint: error hint: QUERY PLAN --------------------------------------------- Nested Loop Join Filter: ("*VALUES*".column1 = t2.c1) -> Seq Scan on t2 -> Materialize -> Values Scan on "*VALUES*" (5 rows) -- No. J-1-6-9 EXPLAIN (COSTS false) WITH c1(c1) AS (SELECT max(t1.c1) FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1) SELECT * FROM s1.t1, c1 WHERE t1.c1 = c1.c1; QUERY PLAN ---------------------------------------------------------- Nested Loop -> Aggregate -> Merge Join Merge Cond: (t1_1.c1 = t2.c1) -> Index Only Scan using t1_i1 on t1 t1_1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = (max(t1_1.c1))) (10 rows) /*+NestLoop(t1 t2)HashJoin(t1 c1)*/ EXPLAIN (COSTS false) WITH c1(c1) AS (SELECT max(t1.c1) FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1) SELECT * FROM s1.t1, c1 WHERE t1.c1 = c1.c1; LOG: pg_hint_plan: used hint: HashJoin(c1 t1) NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ---------------------------------------------------------------- Hash Join Hash Cond: (t1.c1 = (max(t1_1.c1))) -> Seq Scan on t1 -> Hash -> Aggregate -> Nested Loop -> Seq Scan on t2 -> Index Only Scan using t1_i1 on t1 t1_1 Index Cond: (c1 = t2.c1) (9 rows) -- No. J-1-6-10 EXPLAIN (COSTS false) SELECT * FROM s1.v1 t1, s1.v1 t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------ Hash Join Hash Cond: (v1t1.c1 = v1t1_1.c1) -> Seq Scan on t1 v1t1 -> Hash -> Seq Scan on t1 v1t1_1 (5 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.v1 t1, s1.v1 t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: not used hint: NestLoop(t1 t2) duplication hint: error hint: QUERY PLAN ------------------------------------ Hash Join Hash Cond: (v1t1.c1 = v1t1_1.c1) -> Seq Scan on t1 v1t1 -> Hash -> Seq Scan on t1 v1t1_1 (5 rows) /*+NestLoop(v1t1 v1t1_)*/ EXPLAIN (COSTS false) SELECT * FROM s1.v1 t1, s1.v1_ t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(v1t1 v1t1_) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------ Nested Loop -> Seq Scan on t1 v1t1 -> Index Scan using t1_i1 on t1 v1t1_ Index Cond: (c1 = v1t1.c1) (4 rows) -- No. J-1-6-11 EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1 AND t1.c1 = (SELECT max(st1.c1) FROM s1.t1 st1, s1.t2 st2 WHERE st1.c1 = st2.c1); QUERY PLAN ----------------------------------------------------------- Nested Loop InitPlan 1 (returns $0) -> Aggregate -> Merge Join Merge Cond: (st1.c1 = st2.c1) -> Index Only Scan using t1_i1 on t1 st1 -> Sort Sort Key: st2.c1 -> Seq Scan on t2 st2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = $0) -> Seq Scan on t2 Filter: (c1 = $0) (13 rows) \o results/ut-J.tmpout /*+MergeJoin(t1 t2)NestLoop(st1 st2)*/ EXPLAIN (COSTS true) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1 AND t1.c1 = (SELECT max(st1.c1) FROM s1.t1 st1, s1.t2 st2 WHERE st1.c1 = st2.c1); LOG: pg_hint_plan: used hint: NestLoop(st1 st2) MergeJoin(t1 t2) not used hint: duplication hint: error hint: \o \! sql/maskout.sh results/ut-J.tmpout QUERY PLAN --------------------------------------------------------------------------------------------- Nested Loop (cost={inf}..{inf} rows=1 width=xxx) InitPlan 1 (returns $1) -> Aggregate (cost=xxx..xxx rows=1 width=xxx) -> Nested Loop (cost=xxx..xxx rows=100 width=xxx) -> Seq Scan on t2 st2 (cost=xxx..xxx rows=100 width=xxx) -> Index Only Scan using t1_i1 on t1 st1 (cost=xxx..xxx rows=1 width=xxx) Index Cond: (c1 = st2.c1) -> Index Scan using t1_i1 on t1 (cost=xxx..xxx rows=1 width=xxx) Index Cond: (c1 = $1) -> Seq Scan on t2 (cost=xxx..xxx rows=1 width=xxx) Filter: (c1 = $1) -- -- There are cases where difference in the measured value and predicted value -- depending upon the version of PostgreSQL -- EXPLAIN (COSTS false) SELECT * FROM s1.t1, (SELECT t2.c1 FROM s1.t2) st2 WHERE t1.c1 = st2.c1; QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) /*+HashJoin(t1 st2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, (SELECT t2.c1 FROM s1.t2) st2 WHERE t1.c1 = st2.c1; LOG: pg_hint_plan: used hint: not used hint: HashJoin(st2 t1) duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, (SELECT t2.c1 FROM s1.t2) st2 WHERE t1.c1 = st2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) ---- ---- No. J-2-1 some complexity query blocks ---- -- No. J-2-1-1 EXPLAIN (COSTS false) SELECT max(bmt1.c1), ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' ; QUERY PLAN ------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (47 rows) /*+ Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) MergeJoin(bmt1 bmt2)HashJoin(bmt1 bmt2 bmt3)NestLoop(bmt1 bmt2 bmt3 bmt4) MergeJoin(b1t2 b1t3)HashJoin(b1t2 b1t3 b1t4)NestLoop(b1t2 b1t3 b1t4 b1t1) MergeJoin(b2t3 b2t4)HashJoin(b2t3 b2t4 b2t1)NestLoop(b2t3 b2t4 b2t1 b2t2) */ EXPLAIN (COSTS false) SELECT max(bmt1.c1), ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' ; LOG: pg_hint_plan: used hint: MergeJoin(b1t2 b1t3) MergeJoin(b2t3 b2t4) MergeJoin(bmt1 bmt2) HashJoin(b1t2 b1t3 b1t4) HashJoin(b2t1 b2t3 b2t4) HashJoin(bmt1 bmt2 bmt3) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b2t1 b2t2 b2t3 b2t4) NestLoop(bmt1 bmt2 bmt3 bmt4) Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t2.c1 = b1t1.c1) -> Hash Join Hash Cond: (b1t4.c1 = b1t2.c1) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t2.c1 = b1t3.c1) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Hash Join Hash Cond: (b2t1.c1 = b2t3.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t3.c1 = b2t4.c1) -> Sort Sort Key: b2t3.c1 -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t4.c1 -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Hash Join Hash Cond: (bmt3.c1 = bmt1.c1) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt1.c1 = bmt2.c1) -> Sort Sort Key: bmt1.c1 -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt2.c1 -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (62 rows) -- No. J-2-1-2 EXPLAIN (COSTS false) SELECT max(bmt1.c1), ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ), ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' ; QUERY PLAN ------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) InitPlan 3 (returns $2) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t4.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t2.c1) -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (63 rows) /*+ Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) Leading(b3t4 b3t1 b3t2 b3t3) MergeJoin(bmt1 bmt2)HashJoin(bmt1 bmt2 bmt3)NestLoop(bmt1 bmt2 bmt3 bmt4) MergeJoin(b1t2 b1t3)HashJoin(b1t2 b1t3 b1t4)NestLoop(b1t2 b1t3 b1t4 b1t1) MergeJoin(b2t3 b2t4)HashJoin(b2t3 b2t4 b2t1)NestLoop(b2t3 b2t4 b2t1 b2t2) MergeJoin(b3t4 b3t1)HashJoin(b3t4 b3t1 b3t2)NestLoop(b3t1 b3t2 b3t3 b3t4) */ EXPLAIN (COSTS false) SELECT max(bmt1.c1), ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ), ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' ; LOG: pg_hint_plan: used hint: MergeJoin(b1t2 b1t3) MergeJoin(b2t3 b2t4) MergeJoin(b3t1 b3t4) MergeJoin(bmt1 bmt2) HashJoin(b1t2 b1t3 b1t4) HashJoin(b2t1 b2t3 b2t4) HashJoin(b3t1 b3t2 b3t4) HashJoin(bmt1 bmt2 bmt3) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b2t1 b2t2 b2t3 b2t4) NestLoop(b3t1 b3t2 b3t3 b3t4) NestLoop(bmt1 bmt2 bmt3 bmt4) Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) Leading(b3t4 b3t1 b3t2 b3t3) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t2.c1 = b1t1.c1) -> Hash Join Hash Cond: (b1t4.c1 = b1t2.c1) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t2.c1 = b1t3.c1) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Hash Join Hash Cond: (b2t1.c1 = b2t3.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t3.c1 = b2t4.c1) -> Sort Sort Key: b2t3.c1 -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t4.c1 -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) InitPlan 3 (returns $2) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Hash Join Hash Cond: (b3t2.c1 = b3t1.c1) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b3t1.c1 = b3t4.c1) -> Sort Sort Key: b3t1.c1 -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b3t4.c1 -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Hash Join Hash Cond: (bmt3.c1 = bmt1.c1) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt1.c1 = bmt2.c1) -> Sort Sort Key: bmt1.c1 -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt2.c1 -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (83 rows) -- No. J-2-1-3 EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, (SELECT ctid, * FROM s1.t3 bmt3) sbmt3, (SELECT ctid, * FROM s1.t4 bmt4) sbmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = sbmt3.c1 AND sbmt3.ctid = '(1,1)' AND bmt1.c1 = sbmt4.c1 AND sbmt4.ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (15 rows) /*+ Leading(bmt4 bmt3 bmt2 bmt1) MergeJoin(bmt4 bmt3)HashJoin(bmt4 bmt3 bmt2)NestLoop(bmt1 bmt2 bmt3 bmt4) */ EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, (SELECT ctid, * FROM s1.t3 bmt3) sbmt3, (SELECT ctid, * FROM s1.t4 bmt4) sbmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = sbmt3.c1 AND sbmt3.ctid = '(1,1)' AND bmt1.c1 = sbmt4.c1 AND sbmt4.ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(bmt3 bmt4) HashJoin(bmt2 bmt3 bmt4) NestLoop(bmt1 bmt2 bmt3 bmt4) Leading(bmt4 bmt3 bmt2 bmt1) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (bmt2.c1 = bmt1.c1) -> Hash Join Hash Cond: (bmt2.c1 = bmt3.c1) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt3.c1 = bmt4.c1) -> Sort Sort Key: bmt3.c1 -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt4.c1 -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) (20 rows) -- No. J-2-1-4 EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, (SELECT ctid, * FROM s1.t2 bmt2) sbmt2, (SELECT ctid, * FROM s1.t3 bmt3) sbmt3, (SELECT ctid, * FROM s1.t4 bmt4) sbmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = sbmt2.c1 AND sbmt2.ctid = '(1,1)' AND bmt1.c1 = sbmt3.c1 AND sbmt3.ctid = '(1,1)' AND bmt1.c1 = sbmt4.c1 AND sbmt4.ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (15 rows) /*+ Leading(bmt4 bmt3 bmt2 bmt1) MergeJoin(bmt4 bmt3)HashJoin(bmt4 bmt3 bmt2)NestLoop(bmt1 bmt2 bmt3 bmt4) */ EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, (SELECT ctid, * FROM s1.t2 bmt2) sbmt2, (SELECT ctid, * FROM s1.t3 bmt3) sbmt3, (SELECT ctid, * FROM s1.t4 bmt4) sbmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = sbmt2.c1 AND sbmt2.ctid = '(1,1)' AND bmt1.c1 = sbmt3.c1 AND sbmt3.ctid = '(1,1)' AND bmt1.c1 = sbmt4.c1 AND sbmt4.ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(bmt3 bmt4) HashJoin(bmt2 bmt3 bmt4) NestLoop(bmt1 bmt2 bmt3 bmt4) Leading(bmt4 bmt3 bmt2 bmt1) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (bmt2.c1 = bmt1.c1) -> Hash Join Hash Cond: (bmt2.c1 = bmt3.c1) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt3.c1 = bmt4.c1) -> Sort Sort Key: bmt3.c1 -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt4.c1 -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) (20 rows) -- No. J-2-1-5 EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 <> ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) AND bmt1.c1 <> ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) ; QUERY PLAN ------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 <> $0) AND (c1 <> $1)) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (48 rows) /*+ Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) MergeJoin(bmt1 bmt2)HashJoin(bmt1 bmt2 bmt3)NestLoop(bmt1 bmt2 bmt3 bmt4) MergeJoin(b1t2 b1t3)HashJoin(b1t2 b1t3 b1t4)NestLoop(b1t2 b1t3 b1t4 b1t1) MergeJoin(b2t3 b2t4)HashJoin(b2t3 b2t4 b2t1)NestLoop(b2t3 b2t4 b2t1 b2t2) */ EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 <> ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) AND bmt1.c1 <> ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) ; LOG: pg_hint_plan: used hint: MergeJoin(b1t2 b1t3) MergeJoin(b2t3 b2t4) MergeJoin(bmt1 bmt2) HashJoin(b1t2 b1t3 b1t4) HashJoin(b2t1 b2t3 b2t4) HashJoin(bmt1 bmt2 bmt3) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b2t1 b2t2 b2t3 b2t4) NestLoop(bmt1 bmt2 bmt3 bmt4) Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t2.c1 = b1t1.c1) -> Hash Join Hash Cond: (b1t4.c1 = b1t2.c1) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t2.c1 = b1t3.c1) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Hash Join Hash Cond: (b2t1.c1 = b2t3.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t3.c1 = b2t4.c1) -> Sort Sort Key: b2t3.c1 -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t4.c1 -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Hash Join Hash Cond: (bmt3.c1 = bmt1.c1) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt1.c1 = bmt2.c1) -> Sort Sort Key: bmt1.c1 -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 <> $0) AND (c1 <> $1)) -> Sort Sort Key: bmt2.c1 -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (63 rows) -- No. J-2-1-6 EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 <> ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) AND bmt1.c1 <> ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) ; QUERY PLAN ------------------------------------------------------------------------------ Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) InitPlan 3 (returns $2) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t4.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t2.c1) -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 <> $0) AND (c1 <> $1) AND (c1 <> $2)) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (64 rows) /*+ Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) Leading(b3t4 b3t1 b3t2 b3t3) MergeJoin(bmt1 bmt2)HashJoin(bmt1 bmt2 bmt3)NestLoop(bmt1 bmt2 bmt3 bmt4) MergeJoin(b1t2 b1t3)HashJoin(b1t2 b1t3 b1t4)NestLoop(b1t2 b1t3 b1t4 b1t1) MergeJoin(b2t3 b2t4)HashJoin(b2t3 b2t4 b2t1)NestLoop(b2t3 b2t4 b2t1 b2t2) MergeJoin(b3t4 b3t1)HashJoin(b3t4 b3t1 b3t2)NestLoop(b3t1 b3t2 b3t3 b3t4) */ EXPLAIN (COSTS false) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 <> ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) AND bmt1.c1 <> ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) ; LOG: pg_hint_plan: used hint: MergeJoin(b1t2 b1t3) MergeJoin(b2t3 b2t4) MergeJoin(b3t1 b3t4) MergeJoin(bmt1 bmt2) HashJoin(b1t2 b1t3 b1t4) HashJoin(b2t1 b2t3 b2t4) HashJoin(b3t1 b3t2 b3t4) HashJoin(bmt1 bmt2 bmt3) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b2t1 b2t2 b2t3 b2t4) NestLoop(b3t1 b3t2 b3t3 b3t4) NestLoop(bmt1 bmt2 bmt3 bmt4) Leading(bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) Leading(b3t4 b3t1 b3t2 b3t3) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------------------------------------------------------ Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b1t2.c1 = b1t1.c1) -> Hash Join Hash Cond: (b1t4.c1 = b1t2.c1) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t2.c1 = b1t3.c1) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Hash Join Hash Cond: (b2t1.c1 = b2t3.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t3.c1 = b2t4.c1) -> Sort Sort Key: b2t3.c1 -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t4.c1 -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) InitPlan 3 (returns $2) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Hash Join Hash Cond: (b3t2.c1 = b3t1.c1) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b3t1.c1 = b3t4.c1) -> Sort Sort Key: b3t1.c1 -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b3t4.c1 -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Hash Join Hash Cond: (bmt3.c1 = bmt1.c1) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt1.c1 = bmt2.c1) -> Sort Sort Key: bmt1.c1 -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 <> $0) AND (c1 <> $1) AND (c1 <> $2)) -> Sort Sort Key: bmt2.c1 -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (84 rows) -- No. J-2-1-7 EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) , c2 (c1) AS ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 , c1, c2 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 = c2.c1 ; QUERY PLAN ----------------------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (bmt1.c1 = (max(b2t1.c1))) -> Nested Loop Join Filter: (bmt1.c1 = (max(b1t1.c1))) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) (49 rows) /*+ Leading(c2 c1 bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) MergeJoin(c2 c1)HashJoin(c2 c1 bmt1)NestLoop(c2 c1 bmt1 bmt2)MergeJoin(c2 c1 bmt1 bmt2 bmt3)HashJoin(c2 c1 bmt1 bmt2 bmt3 bmt4) MergeJoin(b1t2 b1t3)HashJoin(b1t2 b1t3 b1t4)NestLoop(b1t2 b1t3 b1t4 b1t1) MergeJoin(b2t3 b2t4)HashJoin(b2t3 b2t4 b2t1)NestLoop(b2t3 b2t4 b2t1 b2t2) */ EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) , c2 (c1) AS ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 , c1, c2 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 = c2.c1 ; LOG: pg_hint_plan: used hint: MergeJoin(b1t2 b1t3) MergeJoin(b2t3 b2t4) MergeJoin(c1 c2) HashJoin(b1t2 b1t3 b1t4) HashJoin(b2t1 b2t3 b2t4) HashJoin(bmt1 c1 c2) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b2t1 b2t2 b2t3 b2t4) NestLoop(bmt1 bmt2 c1 c2) MergeJoin(bmt1 bmt2 bmt3 c1 c2) HashJoin(bmt1 bmt2 bmt3 bmt4 c1 c2) Leading(c2 c1 bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------------------------------------------------------------- Aggregate -> Hash Join Hash Cond: (bmt4.c1 = bmt1.c1) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt1.c1 = bmt3.c1) -> Sort Sort Key: bmt1.c1 -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Hash Join Hash Cond: (bmt1.c1 = (max(b1t1.c1))) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: ((max(b1t1.c1)) = (max(b2t1.c1))) -> Sort Sort Key: (max(b1t1.c1)) -> Aggregate -> Nested Loop Join Filter: (b1t2.c1 = b1t1.c1) -> Hash Join Hash Cond: (b1t4.c1 = b1t2.c1) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t2.c1 = b1t3.c1) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: (max(b2t1.c1)) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Hash Join Hash Cond: (b2t1.c1 = b2t3.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t3.c1 = b2t4.c1) -> Sort Sort Key: b2t3.c1 -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t4.c1 -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt3.c1 -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) (69 rows) -- No. J-2-1-8 EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) , c2 (c1) AS ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) , c3 (c1) AS ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 , c1, c2, c3 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 = c2.c1 AND bmt1.c1 = c3.c1 ; QUERY PLAN ----------------------------------------------------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (bmt1.c1 = (max(b3t1.c1))) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Nested Loop Join Filter: ((max(b1t1.c1)) = bmt1.c1) -> Merge Join Merge Cond: ((max(b1t1.c1)) = (max(b2t1.c1))) -> Sort Sort Key: (max(b1t1.c1)) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: (max(b2t1.c1)) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t4.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t2.c1) -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) (70 rows) /*+ Leading(c3 c2 c1 bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) Leading(b3t4 b3t1 b3t2 b3t3) MergeJoin(c3 c2)HashJoin(c3 c2 c1)NestLoop(c3 c2 c1 bmt1)MergeJoin(c3 c2 c1 bmt1 bmt2)HashJoin(c3 c2 c1 bmt1 bmt2 bmt3)NestLoop(c3 c2 c1 bmt1 bmt2 bmt3 bmt4) MergeJoin(b1t2 b1t3)HashJoin(b1t2 b1t3 b1t4)NestLoop(b1t2 b1t3 b1t4 b1t1) MergeJoin(b2t3 b2t4)HashJoin(b2t3 b2t4 b2t1)NestLoop(b2t3 b2t4 b2t1 b2t2) MergeJoin(b3t4 b3t1)HashJoin(b3t4 b3t1 b3t2)NestLoop(b3t1 b3t2 b3t3 b3t4) */ EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) , c2 (c1) AS ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) , c3 (c1) AS ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) SELECT max(bmt1.c1) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4 , c1, c2, c3 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 = c2.c1 AND bmt1.c1 = c3.c1 ; LOG: pg_hint_plan: used hint: MergeJoin(b1t2 b1t3) MergeJoin(b2t3 b2t4) MergeJoin(b3t1 b3t4) MergeJoin(c2 c3) HashJoin(b1t2 b1t3 b1t4) HashJoin(b2t1 b2t3 b2t4) HashJoin(b3t1 b3t2 b3t4) HashJoin(c1 c2 c3) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b2t1 b2t2 b2t3 b2t4) NestLoop(b3t1 b3t2 b3t3 b3t4) NestLoop(bmt1 c1 c2 c3) MergeJoin(bmt1 bmt2 c1 c2 c3) HashJoin(bmt1 bmt2 bmt3 c1 c2 c3) NestLoop(bmt1 bmt2 bmt3 bmt4 c1 c2 c3) Leading(c3 c2 c1 bmt1 bmt2 bmt3 bmt4) Leading(b1t2 b1t3 b1t4 b1t1) Leading(b2t3 b2t4 b2t1 b2t2) Leading(b3t4 b3t1 b3t2 b3t3) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Hash Join Hash Cond: (bmt3.c1 = bmt1.c1) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt1.c1 = bmt2.c1) -> Sort Sort Key: bmt1.c1 -> Nested Loop Join Filter: ((max(b1t1.c1)) = bmt1.c1) -> Hash Join Hash Cond: ((max(b2t1.c1)) = (max(b1t1.c1))) -> Merge Join Merge Cond: ((max(b2t1.c1)) = (max(b3t1.c1))) -> Sort Sort Key: (max(b2t1.c1)) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Hash Join Hash Cond: (b2t1.c1 = b2t3.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t3.c1 = b2t4.c1) -> Sort Sort Key: b2t3.c1 -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t4.c1 -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: (max(b3t1.c1)) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Hash Join Hash Cond: (b3t2.c1 = b3t1.c1) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b3t1.c1 = b3t4.c1) -> Sort Sort Key: b3t1.c1 -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b3t4.c1 -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Aggregate -> Nested Loop Join Filter: (b1t2.c1 = b1t1.c1) -> Hash Join Hash Cond: (b1t4.c1 = b1t2.c1) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t2.c1 = b1t3.c1) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt2.c1 -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) (91 rows) ---- ---- No. J-2-2 the number of the tables per quiry block ---- -- No. J-2-2-1 EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = 1 ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = 1 ) FROM s1.t1 bmt1, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = 1 AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = 1 ) ; QUERY PLAN --------------------------------------------------------------------- Aggregate InitPlan 2 (returns $1) -> Result InitPlan 1 (returns $0) -> Limit -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) InitPlan 4 (returns $3) -> Result InitPlan 3 (returns $2) -> Limit -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) -> Nested Loop -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 <> $3) AND (c1 = 1)) -> Result One-Time Filter: ($4 = 1) InitPlan 5 (returns $4) -> Limit -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) (26 rows) /*+ Leading(c1 bmt1) HashJoin(bmt1 c1) HashJoin(b1t1 c1) HashJoin(b2t1 c1) HashJoin(b3t1 c1) */ EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = 1 ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = 1 ) FROM s1.t1 bmt1, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = 1 AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = 1 ) ; LOG: pg_hint_plan: used hint: HashJoin(bmt1 c1) Leading(c1 bmt1) not used hint: HashJoin(b1t1 c1) HashJoin(b2t1 c1) HashJoin(b3t1 c1) duplication hint: error hint: QUERY PLAN --------------------------------------------------------------------- Aggregate InitPlan 2 (returns $1) -> Result InitPlan 1 (returns $0) -> Limit -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) InitPlan 4 (returns $3) -> Result InitPlan 3 (returns $2) -> Limit -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) -> Nested Loop -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 <> $3) AND (c1 = 1)) -> Result One-Time Filter: ($4 = 1) InitPlan 5 (returns $4) -> Limit -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) (26 rows) -- No. J-2-2-2 EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' ) ; QUERY PLAN ----------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t2.c1) -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = (max(b1t1.c1))) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 <> $1) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) (33 rows) /*+ Leading(c1 bmt2 bmt1) Leading(b1t2 b1t1) Leading(b2t2 b2t1) Leading(b3t2 b3t1) MergeJoin(c1 bmt2) HashJoin(c1 bmt1 bmt2) MergeJoin(b1t1 b1t2) MergeJoin(b2t1 b2t2) MergeJoin(b3t1 b3t2) */ EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' ) ; LOG: pg_hint_plan: used hint: MergeJoin(b1t1 b1t2) MergeJoin(b2t1 b2t2) MergeJoin(b3t1 b3t2) MergeJoin(bmt2 c1) HashJoin(bmt1 bmt2 c1) Leading(c1 bmt2 bmt1) Leading(b1t2 b1t1) Leading(b2t2 b2t1) Leading(b3t2 b3t1) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Merge Join Merge Cond: (b2t1.c1 = b2t2.c1) -> Sort Sort Key: b2t1.c1 -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t2.c1 -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Merge Join Merge Cond: (b3t1.c1 = b3t2.c1) -> Sort Sort Key: b3t1.c1 -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b3t2.c1 -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Hash Join Hash Cond: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 <> $1) -> Hash -> Merge Join Merge Cond: (bmt2.c1 = (max(b1t1.c1))) -> Sort Sort Key: bmt2.c1 -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: (max(b1t1.c1)) -> Aggregate -> Merge Join Merge Cond: (b1t1.c1 = b1t2.c1) -> Sort Sort Key: b1t1.c1 -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) (50 rows) -- No. J-2-2-3 EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) ; QUERY PLAN ----------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t4.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t2.c1) -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = (max(b1t1.c1))) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 <> $1) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) (65 rows) /*+ Leading(c1 bmt4 bmt3 bmt2 bmt1) Leading(b1t4 b1t3 b1t2 b1t1) Leading(b2t4 b2t3 b2t2 b2t1) Leading(b3t4 b3t3 b3t2 b3t1) MergeJoin(c1 bmt4) HashJoin(c1 bmt4 bmt3) NestLoop(c1 bmt4 bmt3 bmt2) MergeJoin(c1 bmt4 bmt3 bmt2 bmt1) HashJoin(b1t4 b1t3) NestLoop(b1t4 b1t3 b1t2) MergeJoin(b1t4 b1t3 b1t2 b1t1) HashJoin(b2t4 b2t3) NestLoop(b2t4 b2t3 b2t2) MergeJoin(b2t4 b2t3 b2t2 b2t1) HashJoin(b3t4 b3t3) NestLoop(b3t4 b3t3 b3t2) MergeJoin(b3t4 b3t3 b3t2 b3t1) */ EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1, s1.t2 b2t2, s1.t3 b2t3, s1.t4 b2t4 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = b2t2.c1 AND b2t2.ctid = '(1,1)' AND b2t1.c1 = b2t3.c1 AND b2t3.ctid = '(1,1)' AND b2t1.c1 = b2t4.c1 AND b2t4.ctid = '(1,1)' ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1, s1.t2 b3t2, s1.t3 b3t3, s1.t4 b3t4 WHERE b3t1.ctid = '(1,1)' AND b3t1.c1 = b3t2.c1 AND b3t2.ctid = '(1,1)' AND b3t1.c1 = b3t3.c1 AND b3t3.ctid = '(1,1)' AND b3t1.c1 = b3t4.c1 AND b3t4.ctid = '(1,1)' ) ; LOG: pg_hint_plan: used hint: HashJoin(b1t3 b1t4) HashJoin(b2t3 b2t4) HashJoin(b3t3 b3t4) MergeJoin(bmt4 c1) NestLoop(b1t2 b1t3 b1t4) NestLoop(b2t2 b2t3 b2t4) NestLoop(b3t2 b3t3 b3t4) HashJoin(bmt3 bmt4 c1) MergeJoin(b1t1 b1t2 b1t3 b1t4) MergeJoin(b2t1 b2t2 b2t3 b2t4) MergeJoin(b3t1 b3t2 b3t3 b3t4) NestLoop(bmt2 bmt3 bmt4 c1) MergeJoin(bmt1 bmt2 bmt3 bmt4 c1) Leading(c1 bmt4 bmt3 bmt2 bmt1) Leading(b1t4 b1t3 b1t2 b1t1) Leading(b2t4 b2t3 b2t2 b2t1) Leading(b3t4 b3t3 b3t2 b3t1) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------------------------------------------------- Aggregate InitPlan 1 (returns $0) -> Aggregate -> Merge Join Merge Cond: (b2t2.c1 = b2t1.c1) -> Sort Sort Key: b2t2.c1 -> Nested Loop Join Filter: (b2t3.c1 = b2t2.c1) -> Hash Join Hash Cond: (b2t3.c1 = b2t4.c1) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t1.c1 -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) InitPlan 2 (returns $1) -> Aggregate -> Merge Join Merge Cond: (b3t2.c1 = b3t1.c1) -> Sort Sort Key: b3t2.c1 -> Nested Loop Join Filter: (b3t3.c1 = b3t2.c1) -> Hash Join Hash Cond: (b3t3.c1 = b3t4.c1) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b3t1.c1 -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Merge Join Merge Cond: (bmt2.c1 = bmt1.c1) -> Sort Sort Key: bmt2.c1 -> Nested Loop Join Filter: (bmt3.c1 = bmt2.c1) -> Hash Join Hash Cond: (bmt3.c1 = bmt4.c1) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt4.c1 = (max(b1t1.c1))) -> Sort Sort Key: bmt4.c1 -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: (max(b1t1.c1)) -> Aggregate -> Merge Join Merge Cond: (b1t2.c1 = b1t1.c1) -> Sort Sort Key: b1t2.c1 -> Nested Loop Join Filter: (b1t3.c1 = b1t2.c1) -> Hash Join Hash Cond: (b1t3.c1 = b1t4.c1) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t1.c1 -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt1.c1 -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 <> $1) (89 rows) -- No. J-2-2-4 EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = 1 ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1 WHERE b3t1.ctid = '(1,1)' ) ; QUERY PLAN ----------------------------------------------------------------------- Aggregate InitPlan 2 (returns $1) -> Result InitPlan 1 (returns $0) -> Limit -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) InitPlan 3 (returns $3) -> Aggregate -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Nested Loop Join Filter: (bmt1.c1 = (max(b1t1.c1))) -> Nested Loop Join Filter: (bmt1.c1 = bmt4.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt3.c1) -> Nested Loop Join Filter: (bmt1.c1 = bmt2.c1) -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 <> $3) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) (44 rows) /*+ Leading(c1 bmt4 bmt3 bmt2 bmt1) Leading(b1t4 b1t3 b1t2 b1t1) MergeJoin(c1 bmt4) HashJoin(c1 bmt4 bmt3) NestLoop(c1 bmt4 bmt3 bmt2) MergeJoin(c1 bmt4 bmt3 bmt2 bmt1) MergeJoin(b1t4 b1t3) HashJoin(b1t4 b1t3 b1t2) NestLoop(b1t4 b1t3 b1t2 b1t1) */ EXPLAIN (COSTS false) WITH c1 (c1) AS ( SELECT max(b1t1.c1) FROM s1.t1 b1t1, s1.t2 b1t2, s1.t3 b1t3, s1.t4 b1t4 WHERE b1t1.ctid = '(1,1)' AND b1t1.c1 = b1t2.c1 AND b1t2.ctid = '(1,1)' AND b1t1.c1 = b1t3.c1 AND b1t3.ctid = '(1,1)' AND b1t1.c1 = b1t4.c1 AND b1t4.ctid = '(1,1)' ) SELECT max(bmt1.c1), ( SELECT max(b2t1.c1) FROM s1.t1 b2t1 WHERE b2t1.ctid = '(1,1)' AND b2t1.c1 = 1 ) FROM s1.t1 bmt1, s1.t2 bmt2, s1.t3 bmt3, s1.t4 bmt4, c1 WHERE bmt1.ctid = '(1,1)' AND bmt1.c1 = bmt2.c1 AND bmt2.ctid = '(1,1)' AND bmt1.c1 = bmt3.c1 AND bmt3.ctid = '(1,1)' AND bmt1.c1 = bmt4.c1 AND bmt4.ctid = '(1,1)' AND bmt1.c1 = c1.c1 AND bmt1.c1 <> ( SELECT max(b3t1.c1) FROM s1.t1 b3t1 WHERE b3t1.ctid = '(1,1)' ) ; LOG: pg_hint_plan: used hint: MergeJoin(b1t3 b1t4) MergeJoin(bmt4 c1) HashJoin(b1t2 b1t3 b1t4) HashJoin(bmt3 bmt4 c1) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(bmt2 bmt3 bmt4 c1) MergeJoin(bmt1 bmt2 bmt3 bmt4 c1) Leading(c1 bmt4 bmt3 bmt2 bmt1) Leading(b1t4 b1t3 b1t2 b1t1) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------------------------------------------------- Aggregate InitPlan 2 (returns $1) -> Result InitPlan 1 (returns $0) -> Limit -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) Filter: ((c1 IS NOT NULL) AND (c1 = 1)) InitPlan 3 (returns $3) -> Aggregate -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Merge Join Merge Cond: (bmt2.c1 = bmt1.c1) -> Sort Sort Key: bmt2.c1 -> Nested Loop Join Filter: (bmt3.c1 = bmt2.c1) -> Hash Join Hash Cond: (bmt3.c1 = bmt4.c1) -> Tid Scan on t3 bmt3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (bmt4.c1 = (max(b1t1.c1))) -> Sort Sort Key: bmt4.c1 -> Tid Scan on t4 bmt4 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: (max(b1t1.c1)) -> Aggregate -> Nested Loop Join Filter: (b1t2.c1 = b1t1.c1) -> Hash Join Hash Cond: (b1t2.c1 = b1t3.c1) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t3.c1 = b1t4.c1) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t4.c1 -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 bmt2 Filter: (ctid = '(1,1)'::tid) -> Sort Sort Key: bmt1.c1 -> Tid Scan on t1 bmt1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 <> $3) (58 rows) ---- ---- No. J-2-3 RULE or VIEW ---- -- No. J-2-3-1 EXPLAIN (COSTS false) UPDATE s1.r1 SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (t1.c1 = t4.c1) -> Nested Loop Join Filter: (t1.c1 = t3.c1) -> Nested Loop Join Filter: (t1.c1 = t2.c1) -> Nested Loop -> Tid Scan on r1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) (19 rows) /*+ Leading(t4 t3 t2 t1 r1) MergeJoin(t4 t3 t2 t1 r1) HashJoin(t4 t3 t2 t1) NestLoop(t4 t3 t2) MergeJoin(t4 t3) */ EXPLAIN (COSTS false) UPDATE s1.r1 SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(t3 t4) NestLoop(t2 t3 t4) HashJoin(t1 t2 t3 t4) MergeJoin(r1 t1 t2 t3 t4) Leading(t4 t3 t2 t1 r1) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------- Aggregate -> Nested Loop -> Hash Join Hash Cond: (t1.c1 = t2.c1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Nested Loop Join Filter: (t3.c1 = t2.c1) -> Merge Join Merge Cond: (t3.c1 = t4.c1) -> Sort Sort Key: t3.c1 -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: t4.c1 -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on r1 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) (24 rows) EXPLAIN (COSTS false) UPDATE s1.r1_ SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Nested Loop -> Tid Scan on r1_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) (19 rows) /*+ Leading(b1t4 b1t3 b1t2 b1t1 r1_) MergeJoin(b1t4 b1t3 b1t2 b1t1 r1_) HashJoin(b1t4 b1t3 b1t2 b1t1) NestLoop(b1t4 b1t3 b1t2) MergeJoin(b1t4 b1t3) */ EXPLAIN (COSTS false) UPDATE s1.r1_ SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(b1t3 b1t4) NestLoop(b1t2 b1t3 b1t4) HashJoin(b1t1 b1t2 b1t3 b1t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r1_) Leading(b1t4 b1t3 b1t2 b1t1 r1_) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------- Aggregate -> Nested Loop -> Hash Join Hash Cond: (b1t1.c1 = b1t2.c1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Nested Loop Join Filter: (b1t3.c1 = b1t2.c1) -> Merge Join Merge Cond: (b1t3.c1 = b1t4.c1) -> Sort Sort Key: b1t3.c1 -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t4.c1 -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on r1_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) (24 rows) -- No. J-2-3-2 EXPLAIN (COSTS false) UPDATE s1.r2 SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (t1.c1 = t4.c1) -> Nested Loop Join Filter: (t1.c1 = t3.c1) -> Nested Loop Join Filter: (t1.c1 = t2.c1) -> Nested Loop -> Tid Scan on r2 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) Aggregate -> Nested Loop Join Filter: (t1.c1 = t4.c1) -> Nested Loop Join Filter: (t1.c1 = t3.c1) -> Nested Loop Join Filter: (t1.c1 = t2.c1) -> Nested Loop -> Tid Scan on r2 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) (39 rows) /*+ Leading(t4 t3 t2 t1 r2) MergeJoin(t4 t3 t2 t1 r2) HashJoin(t4 t3 t2 t1) NestLoop(t4 t3 t2) MergeJoin(t4 t3) */ EXPLAIN (COSTS false) UPDATE s1.r2 SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(t3 t4) NestLoop(t2 t3 t4) HashJoin(t1 t2 t3 t4) MergeJoin(r2 t1 t2 t3 t4) Leading(t4 t3 t2 t1 r2) not used hint: duplication hint: error hint: LOG: pg_hint_plan: used hint: MergeJoin(t3 t4) NestLoop(t2 t3 t4) HashJoin(t1 t2 t3 t4) MergeJoin(r2 t1 t2 t3 t4) Leading(t4 t3 t2 t1 r2) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------- Aggregate -> Nested Loop -> Hash Join Hash Cond: (t1.c1 = t2.c1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Nested Loop Join Filter: (t3.c1 = t2.c1) -> Merge Join Merge Cond: (t3.c1 = t4.c1) -> Sort Sort Key: t3.c1 -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: t4.c1 -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on r2 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) Aggregate -> Nested Loop -> Hash Join Hash Cond: (t1.c1 = t2.c1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Nested Loop Join Filter: (t3.c1 = t2.c1) -> Merge Join Merge Cond: (t3.c1 = t4.c1) -> Sort Sort Key: t3.c1 -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: t4.c1 -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on r2 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) (49 rows) EXPLAIN (COSTS false) UPDATE s1.r2_ SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Nested Loop -> Tid Scan on r2_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Nested Loop -> Tid Scan on r2_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) (39 rows) /*+ Leading(b1t1 b1t2 b1t3 b1t4 r2_) Leading(b2t1 b2t2 b2t3 b2t4 r2_) MergeJoin(b1t1 b1t2) HashJoin(b1t1 b1t2 b1t3) NestLoop(b1t1 b1t2 b1t3 b1t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r2_) MergeJoin(b2t1 b2t2) HashJoin(b2t1 b2t2 b2t3) NestLoop(b2t1 b2t2 b2t3 b2t4) MergeJoin(b2t1 b2t2 b2t3 b2t4 r2_) */ EXPLAIN (COSTS false) UPDATE s1.r2_ SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(b1t1 b1t2) HashJoin(b1t1 b1t2 b1t3) NestLoop(b1t1 b1t2 b1t3 b1t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r2_) Leading(b1t1 b1t2 b1t3 b1t4 r2_) not used hint: MergeJoin(b2t1 b2t2) HashJoin(b2t1 b2t2 b2t3) NestLoop(b2t1 b2t2 b2t3 b2t4) MergeJoin(b2t1 b2t2 b2t3 b2t4 r2_) Leading(b2t1 b2t2 b2t3 b2t4 r2_) duplication hint: error hint: LOG: pg_hint_plan: used hint: MergeJoin(b2t1 b2t2) HashJoin(b2t1 b2t2 b2t3) NestLoop(b2t1 b2t2 b2t3 b2t4) MergeJoin(b2t1 b2t2 b2t3 b2t4 r2_) Leading(b2t1 b2t2 b2t3 b2t4 r2_) not used hint: MergeJoin(b1t1 b1t2) HashJoin(b1t1 b1t2 b1t3) NestLoop(b1t1 b1t2 b1t3 b1t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r2_) Leading(b1t1 b1t2 b1t3 b1t4 r2_) duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------- Aggregate -> Nested Loop -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Hash Join Hash Cond: (b1t3.c1 = b1t1.c1) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t1.c1 = b1t2.c1) -> Sort Sort Key: b1t1.c1 -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on r2_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) Aggregate -> Nested Loop -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Hash Join Hash Cond: (b2t3.c1 = b2t1.c1) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t1.c1 = b2t2.c1) -> Sort Sort Key: b2t1.c1 -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t2.c1 -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on r2_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) (49 rows) -- No. J-2-3-3 EXPLAIN (COSTS false) UPDATE s1.r3 SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (t1.c1 = t4.c1) -> Nested Loop Join Filter: (t1.c1 = t3.c1) -> Nested Loop Join Filter: (t1.c1 = t2.c1) -> Nested Loop -> Tid Scan on r3 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) Aggregate -> Nested Loop Join Filter: (t1.c1 = t4.c1) -> Nested Loop Join Filter: (t1.c1 = t3.c1) -> Nested Loop Join Filter: (t1.c1 = t2.c1) -> Nested Loop -> Tid Scan on r3 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) Aggregate -> Nested Loop Join Filter: (t1.c1 = t4.c1) -> Nested Loop Join Filter: (t1.c1 = t3.c1) -> Nested Loop Join Filter: (t1.c1 = t2.c1) -> Nested Loop -> Tid Scan on r3 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) (59 rows) /*+ Leading(t4 t3 t2 t1 r3) MergeJoin(t4 t3 t2 t1 r3) HashJoin(t4 t3 t2 t1) NestLoop(t4 t3 t2) MergeJoin(t4 t3) */ EXPLAIN (COSTS false) UPDATE s1.r3 SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(t3 t4) NestLoop(t2 t3 t4) HashJoin(t1 t2 t3 t4) MergeJoin(r3 t1 t2 t3 t4) Leading(t4 t3 t2 t1 r3) not used hint: duplication hint: error hint: LOG: pg_hint_plan: used hint: MergeJoin(t3 t4) NestLoop(t2 t3 t4) HashJoin(t1 t2 t3 t4) MergeJoin(r3 t1 t2 t3 t4) Leading(t4 t3 t2 t1 r3) not used hint: duplication hint: error hint: LOG: pg_hint_plan: used hint: MergeJoin(t3 t4) NestLoop(t2 t3 t4) HashJoin(t1 t2 t3 t4) MergeJoin(r3 t1 t2 t3 t4) Leading(t4 t3 t2 t1 r3) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------- Aggregate -> Nested Loop -> Hash Join Hash Cond: (t1.c1 = t2.c1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Nested Loop Join Filter: (t3.c1 = t2.c1) -> Merge Join Merge Cond: (t3.c1 = t4.c1) -> Sort Sort Key: t3.c1 -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: t4.c1 -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on r3 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) Aggregate -> Nested Loop -> Hash Join Hash Cond: (t1.c1 = t2.c1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Nested Loop Join Filter: (t3.c1 = t2.c1) -> Merge Join Merge Cond: (t3.c1 = t4.c1) -> Sort Sort Key: t3.c1 -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: t4.c1 -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on r3 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) Aggregate -> Nested Loop -> Hash Join Hash Cond: (t1.c1 = t2.c1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Nested Loop Join Filter: (t3.c1 = t2.c1) -> Merge Join Merge Cond: (t3.c1 = t4.c1) -> Sort Sort Key: t3.c1 -> Tid Scan on t3 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: t4.c1 -> Tid Scan on t4 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on r3 TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) (74 rows) EXPLAIN (COSTS false) UPDATE s1.r3_ SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; QUERY PLAN ----------------------------------------------------------------- Aggregate -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t3.c1) -> Nested Loop Join Filter: (b1t1.c1 = b1t2.c1) -> Nested Loop -> Tid Scan on r3_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) Aggregate -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t3.c1) -> Nested Loop Join Filter: (b2t1.c1 = b2t2.c1) -> Nested Loop -> Tid Scan on r3_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) Aggregate -> Nested Loop Join Filter: (b3t1.c1 = b3t4.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t3.c1) -> Nested Loop Join Filter: (b3t1.c1 = b3t2.c1) -> Nested Loop -> Tid Scan on r3_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) (59 rows) /*+ Leading(b1t1 b1t2 b1t3 b1t4 r3_) Leading(b2t1 b2t2 b2t3 b2t4 r3_) Leading(b3t1 b3t2 b3t3 b3t4 r3_) MergeJoin(b1t1 b1t2) HashJoin(b1t1 b1t2 b1t3) NestLoop(b1t1 b1t2 b1t3 b1t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r3_) MergeJoin(b2t1 b2t2) HashJoin(b2t1 b2t2 b2t3) NestLoop(b2t1 b2t2 b2t3 b2t4) MergeJoin(b2t1 b2t2 b2t3 b2t4 r3_) MergeJoin(b3t1 b3t2) HashJoin(b3t1 b3t2 b3t3) NestLoop(b3t1 b3t2 b3t3 b3t4) MergeJoin(b3t1 b3t2 b3t3 b3t4 r3_) */ EXPLAIN (COSTS false) UPDATE s1.r3_ SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)'; LOG: pg_hint_plan: used hint: MergeJoin(b1t1 b1t2) HashJoin(b1t1 b1t2 b1t3) NestLoop(b1t1 b1t2 b1t3 b1t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r3_) Leading(b1t1 b1t2 b1t3 b1t4 r3_) not used hint: MergeJoin(b2t1 b2t2) MergeJoin(b3t1 b3t2) HashJoin(b2t1 b2t2 b2t3) HashJoin(b3t1 b3t2 b3t3) NestLoop(b2t1 b2t2 b2t3 b2t4) NestLoop(b3t1 b3t2 b3t3 b3t4) MergeJoin(b2t1 b2t2 b2t3 b2t4 r3_) MergeJoin(b3t1 b3t2 b3t3 b3t4 r3_) Leading(b2t1 b2t2 b2t3 b2t4 r3_) Leading(b3t1 b3t2 b3t3 b3t4 r3_) duplication hint: error hint: LOG: pg_hint_plan: used hint: MergeJoin(b2t1 b2t2) HashJoin(b2t1 b2t2 b2t3) NestLoop(b2t1 b2t2 b2t3 b2t4) MergeJoin(b2t1 b2t2 b2t3 b2t4 r3_) Leading(b2t1 b2t2 b2t3 b2t4 r3_) not used hint: MergeJoin(b1t1 b1t2) MergeJoin(b3t1 b3t2) HashJoin(b1t1 b1t2 b1t3) HashJoin(b3t1 b3t2 b3t3) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b3t1 b3t2 b3t3 b3t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r3_) MergeJoin(b3t1 b3t2 b3t3 b3t4 r3_) Leading(b1t1 b1t2 b1t3 b1t4 r3_) Leading(b3t1 b3t2 b3t3 b3t4 r3_) duplication hint: error hint: LOG: pg_hint_plan: used hint: MergeJoin(b3t1 b3t2) HashJoin(b3t1 b3t2 b3t3) NestLoop(b3t1 b3t2 b3t3 b3t4) MergeJoin(b3t1 b3t2 b3t3 b3t4 r3_) Leading(b3t1 b3t2 b3t3 b3t4 r3_) not used hint: MergeJoin(b1t1 b1t2) MergeJoin(b2t1 b2t2) HashJoin(b1t1 b1t2 b1t3) HashJoin(b2t1 b2t2 b2t3) NestLoop(b1t1 b1t2 b1t3 b1t4) NestLoop(b2t1 b2t2 b2t3 b2t4) MergeJoin(b1t1 b1t2 b1t3 b1t4 r3_) MergeJoin(b2t1 b2t2 b2t3 b2t4 r3_) Leading(b1t1 b1t2 b1t3 b1t4 r3_) Leading(b2t1 b2t2 b2t3 b2t4 r3_) duplication hint: error hint: QUERY PLAN ----------------------------------------------------------------------------- Aggregate -> Nested Loop -> Nested Loop Join Filter: (b1t1.c1 = b1t4.c1) -> Hash Join Hash Cond: (b1t3.c1 = b1t1.c1) -> Tid Scan on t3 b1t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b1t1.c1 = b1t2.c1) -> Sort Sort Key: b1t1.c1 -> Tid Scan on t1 b1t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b1t2.c1 -> Seq Scan on t2 b1t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b1t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on r3_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) Aggregate -> Nested Loop -> Nested Loop Join Filter: (b2t1.c1 = b2t4.c1) -> Hash Join Hash Cond: (b2t3.c1 = b2t1.c1) -> Tid Scan on t3 b2t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b2t1.c1 = b2t2.c1) -> Sort Sort Key: b2t1.c1 -> Tid Scan on t1 b2t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b2t2.c1 -> Seq Scan on t2 b2t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b2t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on r3_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) Aggregate -> Nested Loop -> Nested Loop Join Filter: (b3t1.c1 = b3t4.c1) -> Hash Join Hash Cond: (b3t3.c1 = b3t1.c1) -> Tid Scan on t3 b3t3 TID Cond: (ctid = '(1,1)'::tid) -> Hash -> Merge Join Merge Cond: (b3t1.c1 = b3t2.c1) -> Sort Sort Key: b3t1.c1 -> Tid Scan on t1 b3t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: b3t2.c1 -> Seq Scan on t2 b3t2 Filter: (ctid = '(1,1)'::tid) -> Tid Scan on t4 b3t4 TID Cond: (ctid = '(1,1)'::tid) -> Tid Scan on r3_ TID Cond: (ctid = '(1,1)'::tid) Filter: (c1 = 1) (74 rows) -- No. J-2-3-4 EXPLAIN (COSTS false) SELECT * FROM s1.v1 v1, s1.v1 v2 WHERE v1.c1 = v2.c1; QUERY PLAN ------------------------------------ Hash Join Hash Cond: (v1t1.c1 = v1t1_1.c1) -> Seq Scan on t1 v1t1 -> Hash -> Seq Scan on t1 v1t1_1 (5 rows) /*+HashJoin(v1t1 v1t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.v1 v1, s1.v1 v2 WHERE v1.c1 = v2.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(v1t1 v1t1)" DETAIL: Relation name "v1t1" is ambiguous. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: HashJoin(v1t1 v1t1) QUERY PLAN ------------------------------------ Hash Join Hash Cond: (v1t1.c1 = v1t1_1.c1) -> Seq Scan on t1 v1t1 -> Hash -> Seq Scan on t1 v1t1_1 (5 rows) -- No. J-2-3-5 EXPLAIN (COSTS false) SELECT * FROM s1.v1 v1, s1.v1_ v2 WHERE v1.c1 = v2.c1; QUERY PLAN ----------------------------------- Hash Join Hash Cond: (v1t1.c1 = v1t1_.c1) -> Seq Scan on t1 v1t1 -> Hash -> Seq Scan on t1 v1t1_ (5 rows) /*+NestLoop(v1t1 v1t1_)*/ EXPLAIN (COSTS false) SELECT * FROM s1.v1 v1, s1.v1_ v2 WHERE v1.c1 = v2.c1; LOG: pg_hint_plan: used hint: NestLoop(v1t1 v1t1_) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------ Nested Loop -> Seq Scan on t1 v1t1 -> Index Scan using t1_i1 on t1 v1t1_ Index Cond: (c1 = v1t1.c1) (4 rows) -- No. J-2-3-6 EXPLAIN (COSTS false) SELECT * FROM s1.r4 t1, s1.r4 t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------ Hash Join Hash Cond: (r4t1.c1 = r4t1_1.c1) -> Seq Scan on t1 r4t1 -> Hash -> Seq Scan on t1 r4t1_1 (5 rows) /*+HashJoin(r4t1 r4t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.r4 t1, s1.r4 t2 WHERE t1.c1 = t2.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(r4t1 r4t1)" DETAIL: Relation name "r4t1" is ambiguous. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: HashJoin(r4t1 r4t1) QUERY PLAN ------------------------------------ Hash Join Hash Cond: (r4t1.c1 = r4t1_1.c1) -> Seq Scan on t1 r4t1 -> Hash -> Seq Scan on t1 r4t1_1 (5 rows) -- No. J-2-3-7 EXPLAIN (COSTS false) SELECT * FROM s1.r4 t1, s1.r5 t2 WHERE t1.c1 = t2.c1; QUERY PLAN ---------------------------------- Hash Join Hash Cond: (r4t1.c1 = r5t1.c1) -> Seq Scan on t1 r4t1 -> Hash -> Seq Scan on t1 r5t1 (5 rows) /*+NestLoop(r4t1 r5t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.r4 t1, s1.r5 t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(r4t1 r5t1) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------- Nested Loop -> Seq Scan on t1 r4t1 -> Index Scan using t1_i1 on t1 r5t1 Index Cond: (c1 = r4t1.c1) (4 rows) ---- ---- No. J-2-4 VALUES clause ---- -- No. J-2-4-1 EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1')) AS t3 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1; QUERY PLAN ------------------------------------ Nested Loop -> Index Scan using t1_i1 on t1 Index Cond: (c1 = 1) -> Seq Scan on t2 Filter: (c1 = 1) (5 rows) /*+ Leading(t3 t1 t2) HashJoin(t3 t1)NestLoop(t3 t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1')) AS t3 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1; LOG: pg_hint_plan: used hint: not used hint: HashJoin(t1 t3) NestLoop(t1 t2 t3) Leading(t3 t1 t2) duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Index Scan using t1_i1 on t1 Index Cond: (c1 = 1) -> Seq Scan on t2 Filter: (c1 = 1) (5 rows) /*+ Leading(*VALUES* t1 t2) HashJoin(*VALUES* t1)NestLoop(*VALUES* t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t3 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1; LOG: pg_hint_plan: used hint: HashJoin(*VALUES* t1) NestLoop(*VALUES* t1 t2) Leading(*VALUES* t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------------------- Nested Loop -> Hash Join Hash Cond: (t1.c1 = "*VALUES*".column1) -> Seq Scan on t1 -> Hash -> Values Scan on "*VALUES*" -> Index Scan using t2_i1 on t2 Index Cond: (c1 = t1.c1) (8 rows) -- No. J-2-4-2 EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t3 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t4 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1; QUERY PLAN ------------------------------------------------------- Nested Loop -> Nested Loop Join Filter: (t2.c1 = "*VALUES*_1".column1) -> Hash Join Hash Cond: (t2.c1 = "*VALUES*".column1) -> Seq Scan on t2 -> Hash -> Values Scan on "*VALUES*" -> Materialize -> Values Scan on "*VALUES*_1" -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (12 rows) /*+ Leading(t4 t3 t2 t1) NestLoop(t4 t3)HashJoin(t4 t3 t2)MergeJoin(t4 t3 t2 t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t3 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t4 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1; LOG: pg_hint_plan: used hint: not used hint: NestLoop(t3 t4) HashJoin(t2 t3 t4) MergeJoin(t1 t2 t3 t4) Leading(t4 t3 t2 t1) duplication hint: error hint: QUERY PLAN ------------------------------------------------------- Nested Loop -> Nested Loop Join Filter: (t2.c1 = "*VALUES*_1".column1) -> Hash Join Hash Cond: (t2.c1 = "*VALUES*".column1) -> Seq Scan on t2 -> Hash -> Values Scan on "*VALUES*" -> Materialize -> Values Scan on "*VALUES*_1" -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (12 rows) /*+ Leading(*VALUES* t3 t2 t1) NestLoop(t4 t3)HashJoin(*VALUES* t3 t2)MergeJoin(*VALUES* t3 t2 t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t3 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t4 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(*VALUES* t3 t2)MergeJoin(*VALUES* t3 t2 t1)" DETAIL: Relation name "*VALUES*" is ambiguous. INFO: pg_hint_plan: hint syntax error at or near "MergeJoin(*VALUES* t3 t2 t1)" DETAIL: Relation name "*VALUES*" is ambiguous. INFO: pg_hint_plan: hint syntax error at or near "Leading(*VALUES* t3 t2 t1) NestLoop(t4 t3)HashJoin(*VALUES* t3 t2)MergeJoin(*VALUES* t3 t2 t1)" DETAIL: Relation name "*VALUES*" is ambiguous. LOG: pg_hint_plan: used hint: not used hint: NestLoop(t3 t4) duplication hint: error hint: HashJoin(*VALUES* t2 t3) MergeJoin(*VALUES* t1 t2 t3) Leading(*VALUES* t3 t2 t1) QUERY PLAN ------------------------------------------------------- Nested Loop -> Nested Loop Join Filter: (t2.c1 = "*VALUES*_1".column1) -> Hash Join Hash Cond: (t2.c1 = "*VALUES*".column1) -> Seq Scan on t2 -> Hash -> Values Scan on "*VALUES*" -> Materialize -> Values Scan on "*VALUES*_1" -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (12 rows) ---- ---- No. J-3-1 join method hint ---- -- No. J-3-1-1~6 SET enable_nestloop TO on; SET enable_mergejoin TO off; SET enable_hashjoin TO off; EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) /*+MergeJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: MergeJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) SET enable_mergejoin TO on; EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1 AND t1.ctid = '(1,1)';; QUERY PLAN ----------------------------------------- Nested Loop Join Filter: (t1.c1 = t2.c1) -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Seq Scan on t2 (5 rows) /*+NoNestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1 AND t1.ctid = '(1,1)';; LOG: pg_hint_plan: used hint: NoNestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ----------------------------------------------- Merge Join Merge Cond: (t1.c1 = t2.c1) -> Sort Sort Key: t1.c1 -> Tid Scan on t1 TID Cond: (ctid = '(1,1)'::tid) -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (9 rows) SET enable_mergejoin TO off; /*+NoHashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoHashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) /*+NoMergeJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoMergeJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) -- No. J-3-1-7~12 SET enable_nestloop TO off; SET enable_mergejoin TO off; SET enable_hashjoin TO on; EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) /*+MergeJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: MergeJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) /*+NoNestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoNestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) /*+NoHashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoHashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) /*+NoMergeJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoMergeJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) -- No. J-3-1-13~18 SET enable_nestloop TO off; SET enable_mergejoin TO on; SET enable_hashjoin TO off; EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) /*+HashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------ Hash Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) /*+MergeJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: MergeJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) /*+NoNestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoNestLoop(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) /*+NoHashJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoHashJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) /*+NoMergeJoin(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; LOG: pg_hint_plan: used hint: NoMergeJoin(t1 t2) not used hint: duplication hint: error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) SET enable_nestloop TO on; SET enable_mergejoin TO on; SET enable_hashjoin TO on; ---- ---- No. J-3-2 join inherit tables ---- EXPLAIN (COSTS false) SELECT * FROM s1.p1, s1.p2 WHERE p1.c1 = p2.c1; QUERY PLAN ------------------------------------ Hash Join Hash Cond: (p2.c1 = p1.c1) -> Append -> Seq Scan on p2 -> Seq Scan on p2c1 -> Seq Scan on p2c2 -> Seq Scan on p2c3 -> Seq Scan on p2c1c1 -> Seq Scan on p2c1c2 -> Seq Scan on p2c2c1 -> Seq Scan on p2c2c2 -> Seq Scan on p2c3c1 -> Seq Scan on p2c3c2 -> Hash -> Append -> Seq Scan on p1 -> Seq Scan on p1c1 -> Seq Scan on p1c2 -> Seq Scan on p1c3 (19 rows) -- No. J-3-2-1 /*+MergeJoin(p1 p2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.p1, s1.p2 WHERE p1.c1 = p2.c1; LOG: pg_hint_plan: used hint: MergeJoin(p1 p2) not used hint: duplication hint: error hint: QUERY PLAN -------------------------------------- Merge Join Merge Cond: (p1.c1 = p2.c1) -> Sort Sort Key: p1.c1 -> Append -> Seq Scan on p1 -> Seq Scan on p1c1 -> Seq Scan on p1c2 -> Seq Scan on p1c3 -> Sort Sort Key: p2.c1 -> Append -> Seq Scan on p2 -> Seq Scan on p2c1 -> Seq Scan on p2c2 -> Seq Scan on p2c3 -> Seq Scan on p2c1c1 -> Seq Scan on p2c1c2 -> Seq Scan on p2c2c1 -> Seq Scan on p2c2c2 -> Seq Scan on p2c3c1 -> Seq Scan on p2c3c2 (22 rows) -- No. J-3-2-2 /*+MergeJoin(p1c1 p2c1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.p1, s1.p2 WHERE p1.c1 = p2.c1; LOG: pg_hint_plan: used hint: not used hint: MergeJoin(p1c1 p2c1) duplication hint: error hint: QUERY PLAN ------------------------------------ Hash Join Hash Cond: (p2.c1 = p1.c1) -> Append -> Seq Scan on p2 -> Seq Scan on p2c1 -> Seq Scan on p2c2 -> Seq Scan on p2c3 -> Seq Scan on p2c1c1 -> Seq Scan on p2c1c2 -> Seq Scan on p2c2c1 -> Seq Scan on p2c2c2 -> Seq Scan on p2c3c1 -> Seq Scan on p2c3c2 -> Hash -> Append -> Seq Scan on p1 -> Seq Scan on p1c1 -> Seq Scan on p1c2 -> Seq Scan on p1c3 (19 rows) ---- ---- No. J-3-2-2 join partitioned tables ---- EXPLAIN (COSTS false) SELECT * FROM s1.pt1, s1.p2 WHERE pt1.c1 = p2.c1; QUERY PLAN -------------------------------------- Hash Join Hash Cond: (p2.c1 = pt1_c1.c1) -> Append -> Seq Scan on p2 -> Seq Scan on p2c1 -> Seq Scan on p2c2 -> Seq Scan on p2c3 -> Seq Scan on p2c1c1 -> Seq Scan on p2c1c2 -> Seq Scan on p2c2c1 -> Seq Scan on p2c2c2 -> Seq Scan on p2c3c1 -> Seq Scan on p2c3c2 -> Hash -> Append -> Seq Scan on pt1_c1 -> Seq Scan on pt1_c2 -> Seq Scan on pt1_c3 (18 rows) /*+MergeJoin(pt1 p2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.pt1, s1.p2 WHERE pt1.c1 = p2.c1; LOG: pg_hint_plan: used hint: MergeJoin(p2 pt1) not used hint: duplication hint: error hint: QUERY PLAN -------------------------------------- Merge Join Merge Cond: (pt1_c1.c1 = p2.c1) -> Sort Sort Key: pt1_c1.c1 -> Append -> Seq Scan on pt1_c1 -> Seq Scan on pt1_c2 -> Seq Scan on pt1_c3 -> Sort Sort Key: p2.c1 -> Append -> Seq Scan on p2 -> Seq Scan on p2c1 -> Seq Scan on p2c2 -> Seq Scan on p2c3 -> Seq Scan on p2c1c1 -> Seq Scan on p2c1c2 -> Seq Scan on p2c2c1 -> Seq Scan on p2c2c2 -> Seq Scan on p2c3c1 -> Seq Scan on p2c3c2 (21 rows) /*+MergeJoin(pt1_c1 p2c1)*/ /* will ignored */ EXPLAIN (COSTS false) SELECT * FROM s1.pt1, s1.p2 WHERE pt1.c1 = p2.c1; LOG: pg_hint_plan: used hint: not used hint: MergeJoin(p2c1 pt1_c1) duplication hint: error hint: QUERY PLAN -------------------------------------- Hash Join Hash Cond: (p2.c1 = pt1_c1.c1) -> Append -> Seq Scan on p2 -> Seq Scan on p2c1 -> Seq Scan on p2c2 -> Seq Scan on p2c3 -> Seq Scan on p2c1c1 -> Seq Scan on p2c1c2 -> Seq Scan on p2c2c1 -> Seq Scan on p2c2c2 -> Seq Scan on p2c3c1 -> Seq Scan on p2c3c2 -> Hash -> Append -> Seq Scan on pt1_c1 -> Seq Scan on pt1_c2 -> Seq Scan on pt1_c3 (18 rows) ---- ---- No. J-3-3 conflict join method hint ---- EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; QUERY PLAN ------------------------------------ Merge Join Merge Cond: (t1.c1 = t2.c1) -> Index Scan using t1_i1 on t1 -> Sort Sort Key: t2.c1 -> Seq Scan on t2 (6 rows) -- No. J-3-3-1 /*+HashJoin(t1 t2)NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t2)NestLoop(t1 t2)" DETAIL: Conflict join method hint. LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: HashJoin(t1 t2) error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) -- No. J-3-3-2 /*+MergeJoin(t1 t2)HashJoin(t1 t2)NestLoop(t1 t2)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; INFO: pg_hint_plan: hint syntax error at or near "MergeJoin(t1 t2)HashJoin(t1 t2)NestLoop(t1 t2)" DETAIL: Conflict join method hint. INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t2)NestLoop(t1 t2)" DETAIL: Conflict join method hint. LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: MergeJoin(t1 t2) HashJoin(t1 t2) error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) -- No. J-3-3-3 /*+HashJoin(t1 t2)NestLoop(t2 t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t2)NestLoop(t2 t1)" DETAIL: Conflict join method hint. LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: HashJoin(t1 t2) error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) -- No. J-3-3-4 /*+MergeJoin(t2 t1)HashJoin(t1 t2)NestLoop(t2 t1)*/ EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2 WHERE t1.c1 = t2.c1; INFO: pg_hint_plan: hint syntax error at or near "MergeJoin(t2 t1)HashJoin(t1 t2)NestLoop(t2 t1)" DETAIL: Conflict join method hint. INFO: pg_hint_plan: hint syntax error at or near "HashJoin(t1 t2)NestLoop(t2 t1)" DETAIL: Conflict join method hint. LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: MergeJoin(t1 t2) HashJoin(t1 t2) error hint: QUERY PLAN ------------------------------------ Nested Loop -> Seq Scan on t2 -> Index Scan using t1_i1 on t1 Index Cond: (c1 = t2.c1) (4 rows) ---- ---- No. J-3-4 hint state output ---- -- No. J-3-4-1 /*+NestLoop(t1 t2)*/ SELECT * FROM s1.t1, s1.t2 WHERE false; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+---- (0 rows) -- No. J-3-4-2 /*+HashJoin(t1 t2)*/ SELECT * FROM s1.t1, s1.t2 WHERE false; LOG: pg_hint_plan: used hint: HashJoin(t1 t2) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+---- (0 rows) -- No. J-3-4-3 /*+MergeJoin(t1 t2)*/ SELECT * FROM s1.t1, s1.t2 WHERE false; LOG: pg_hint_plan: used hint: MergeJoin(t1 t2) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+---- (0 rows) -- No. J-3-4-4 /*+NoNestLoop(t1 t2)*/ SELECT * FROM s1.t1, s1.t2 WHERE false; LOG: pg_hint_plan: used hint: NoNestLoop(t1 t2) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+---- (0 rows) -- No. J-3-4-5 /*+NoHashJoin(t1 t2)*/ SELECT * FROM s1.t1, s1.t2 WHERE false; LOG: pg_hint_plan: used hint: NoHashJoin(t1 t2) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+---- (0 rows) -- No. J-3-4-6 /*+NoMergeJoin(t1 t2)*/ SELECT * FROM s1.t1, s1.t2 WHERE false; LOG: pg_hint_plan: used hint: NoMergeJoin(t1 t2) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+---- (0 rows) -- No. J-3-4-7 /*+NestLoop()*/ SELECT * FROM s1.t1 WHERE false; INFO: pg_hint_plan: hint syntax error at or near "" DETAIL: NestLoop hint requires at least two relations. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: NestLoop() c1 | c2 | c3 | c4 ----+----+----+---- (0 rows) -- No. J-3-4-8 /*+NestLoop(t1)*/ SELECT * FROM s1.t1 WHERE false; INFO: pg_hint_plan: hint syntax error at or near "" DETAIL: NestLoop hint requires at least two relations. LOG: pg_hint_plan: used hint: not used hint: duplication hint: error hint: NestLoop(t1) c1 | c2 | c3 | c4 ----+----+----+---- (0 rows) -- No. J-3-4-9 /*+NestLoop(t1 t2)*/ SELECT * FROM s1.t1, s1.t2 WHERE false; LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+---- (0 rows) -- No. J-3-4-10 /*+NestLoop(t1 t2 t3)*/ SELECT * FROM s1.t1, s1.t2, s1.t3 WHERE false; LOG: pg_hint_plan: used hint: NestLoop(t1 t2 t3) not used hint: duplication hint: error hint: c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 | c1 | c2 | c3 | c4 ----+----+----+----+----+----+----+----+----+----+----+---- (0 rows) ---- ---- No. J-3-5 not used hint ---- -- No. J-3-5-1 EXPLAIN (COSTS false) SELECT * FROM s1.t1 FULL OUTER JOIN s1.t2 ON (t1.c1 = t2.c1); QUERY PLAN ------------------------------ Hash Full Join Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 -> Hash -> Seq Scan on t2 (5 rows) \o results/ut-J.tmpout /*+NestLoop(t1 t2)*/ EXPLAIN (COSTS true) SELECT * FROM s1.t1 FULL OUTER JOIN s1.t2 ON (t1.c1 = t2.c1); LOG: pg_hint_plan: used hint: NestLoop(t1 t2) not used hint: duplication hint: error hint: \o \! sql/maskout.sh results/ut-J.tmpout QUERY PLAN -------------------------------------------------------------------------- Hash Full Join (cost={inf}..{inf} rows=1000 width=xxx) Hash Cond: (t1.c1 = t2.c1) -> Seq Scan on t1 (cost=xxx..xxx rows=1000 width=xxx) -> Hash (cost=xxx..xxx rows=100 width=xxx) -> Seq Scan on t2 (cost=xxx..xxx rows=100 width=xxx) \! rm results/ut-J.tmpout