LOAD 'pg_hint_plan';
-SET pg_hint_plan.enable TO on;
+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, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
QUERY PLAN
------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
+ Nested Loop
-> Merge Join
- Merge Cond: (t1.c1 = t4.c1)
+ 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
- -> Index Scan using t4_i1 on t4
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t1.c1)
(12 rows)
----
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(14 rows)
-- No. L-1-1-2
QUERY PLAN
----------------------------------------------------
- Merge Join
- Merge Cond: (t_1.c1 = t_2.c1)
+ Nested Loop
-> Merge Join
- Merge Cond: (t_1.c1 = t_4.c1)
+ Merge Cond: (t_1.c1 = t_2.c1)
-> Merge Join
Merge Cond: (t_1.c1 = t_3.c1)
-> Index Scan using t1_i1 on t1 t_1
-> Index Scan using t3_i1 on t3 t_3
- -> Index Scan using t4_i1 on t4 t_4
- -> Sort
- Sort Key: t_2.c1
- -> Seq Scan on t2 t_2
+ -> Sort
+ Sort Key: t_2.c1
+ -> Seq Scan on t2 t_2
+ -> Index Scan using t4_i1 on t4 t_4
+ Index Cond: (c1 = t_1.c1)
(12 rows)
-- No. L-1-1-3
duplication hint:
error hint:
- QUERY PLAN
---------------------------------------------------------
+ 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
- -> Hash Join
- Hash Cond: (t_3.c1 = t_2.c1)
- -> Seq Scan on t3 t_3
- -> Hash
- -> Hash Join
- Hash Cond: (t_4.c1 = t_2.c1)
- -> Seq Scan on t4 t_4
- -> Hash
- -> Seq Scan on t2 t_2
+ -> Nested Loop
+ Join Filter: (t_2.c1 = t_3.c1)
+ -> Hash Join
+ Hash Cond: (t_4.c1 = t_2.c1)
+ -> Seq Scan on t4 t_4
+ -> Hash
+ -> Seq Scan on t2 t_2
+ -> Index Scan using t3_i1 on t3 t_3
+ Index Cond: (c1 = t_4.c1)
(14 rows)
----
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(14 rows)
-- No. L-1-2-2
QUERY PLAN
------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
+ Nested Loop
-> Merge Join
- Merge Cond: (t1.c1 = t4.c1)
+ 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
- -> Index Scan using t4_i1 on t4
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t1.c1)
(12 rows)
----
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(14 rows)
--- No. L-1-3-1
+-- No. L-1-3-2
/*+Leading(t5 t2 t3 t1)*/
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;
LOG: pg_hint_plan:
used hint:
-Leading(t5 t2 t3 t1)
not used hint:
+Leading(t5 t2 t3 t1)
duplication hint:
error hint:
Nested Loop
-> Merge Join
Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
+ -> 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
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Seq Scan on t2
+ -> Seq Scan on t2
-> Index Scan using t4_i1 on t4
Index Cond: (c1 = t1.c1)
-(13 rows)
+(12 rows)
----
---- No. L-1-4 conflict table name
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(14 rows)
-- No. L-1-4-2
QUERY PLAN
------------------------------------------------
Merge Join
- Merge Cond: (s1.t1.c1 = s2.t1.c1)
+ Merge Cond: (t1.c1 = t1_1.c1)
-> Merge Join
- Merge Cond: (s1.t1.c1 = t2.c1)
+ Merge Cond: (t1.c1 = t2.c1)
-> Merge Join
- Merge Cond: (s1.t1.c1 = t3.c1)
+ Merge Cond: (t1.c1 = t3.c1)
-> Index Scan using t1_i1 on t1
-> Index Scan using t3_i1 on t3
- -> Index Scan using t2_i1 on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
-> Sort
- Sort Key: s2.t1.c1
- -> Seq Scan on t1
-(12 rows)
+ Sort Key: t1_1.c1
+ -> Seq Scan on t1 t1_1
+(14 rows)
/*+Leading(t1 t2 t3 t1)*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, s2.t1 WHERE s1.t1.c1 = t2.c1 AND s1.t1.c1 = t3.c1 AND s1.t1.c1 = s2.t1.c1;
-INFO: hint syntax error at or near "Leading(t1 t2 t3 t1)"
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t1 t2 t3 t1)"
DETAIL: Relation name "t1" is ambiguous.
LOG: pg_hint_plan:
used hint:
not used hint:
-Leading(t1 t2 t3 t1)
duplication hint:
error hint:
+Leading(t1 t2 t3 t1)
QUERY PLAN
------------------------------------------------
Merge Join
- Merge Cond: (s1.t1.c1 = s2.t1.c1)
+ Merge Cond: (t1.c1 = t1_1.c1)
-> Merge Join
- Merge Cond: (s1.t1.c1 = t2.c1)
+ Merge Cond: (t1.c1 = t2.c1)
-> Merge Join
- Merge Cond: (s1.t1.c1 = t3.c1)
+ Merge Cond: (t1.c1 = t3.c1)
-> Index Scan using t1_i1 on t1
-> Index Scan using t3_i1 on t3
- -> Index Scan using t2_i1 on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
-> Sort
- Sort Key: s2.t1.c1
- -> Seq Scan on t1
-(12 rows)
+ Sort Key: t1_1.c1
+ -> Seq Scan on t1 t1_1
+(14 rows)
/*+Leading(s1.t1 t2 t3 s2.t1)*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, s2.t1 WHERE s1.t1.c1 = t2.c1 AND s1.t1.c1 = t3.c1 AND s1.t1.c1 = s2.t1.c1;
LOG: pg_hint_plan:
used hint:
-Leading(s1.t1 t2 t3 s2.t1)
not used hint:
+Leading(s1.t1 t2 t3 s2.t1)
duplication hint:
error hint:
QUERY PLAN
------------------------------------------------
- Nested Loop
- -> Nested Loop
+ Merge Join
+ Merge Cond: (t1.c1 = t1_1.c1)
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
-> Merge Join
- Merge Cond: (t3.c1 = t2.c1)
+ 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 t1_pkey on t1
- Index Cond: (c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- Index Cond: (c1 = t2.c1)
-(12 rows)
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Sort
+ Sort Key: t1_1.c1
+ -> Seq Scan on t1 t1_1
+(14 rows)
EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, s2.t1 s2t1 WHERE s1.t1.c1 = t2.c1 AND s1.t1.c1 = t3.c1 AND s1.t1.c1 = s2t1.c1;
QUERY PLAN
Merge Cond: (t1.c1 = t3.c1)
-> Index Scan using t1_i1 on t1
-> Index Scan using t3_i1 on t3
- -> Index Scan using t2_i1 on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
-> Sort
Sort Key: s2t1.c1
-> Seq Scan on t1 s2t1
-(12 rows)
+(14 rows)
/*+Leading(s2t1 t1 t3 t2)*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, s2.t1 s2t1 WHERE s1.t1.c1 = t2.c1 AND s1.t1.c1 = t3.c1 AND s1.t1.c1 = s2t1.c1;
duplication hint:
error hint:
- QUERY PLAN
--------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
- -> Merge Join
- Merge Cond: (t1.c1 = t3.c1)
+ -> Nested Loop
-> Merge Join
Merge Cond: (t1.c1 = s2t1.c1)
-> Index Scan using t1_i1 on t1
- -> Index Scan using t1_pkey on t1 s2t1
+ -> Sort
+ Sort Key: s2t1.c1
+ -> Seq Scan on t1 s2t1
-> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
-> Sort
Sort Key: t2.c1
-> Seq Scan on t2
-(12 rows)
+(14 rows)
-- No. L-1-4-3
EXPLAIN (COSTS false) SELECT *, (SELECT max(t1.c1) FROM s1.t1, s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1) FROM s1.t1, s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
- QUERY PLAN
----------------------------------------------------------------
- Merge Join
- Merge Cond: (s1.t1.c1 = s1.t2.c1)
- InitPlan 1 (returns $0)
+ QUERY PLAN
+------------------------------------------------------------------------
+ Nested Loop
+ InitPlan 1 (returns $1)
-> Aggregate
- -> Merge Join
- Merge Cond: (s1.t1.c1 = s1.t2.c1)
+ -> Nested Loop
-> Merge Join
- Merge Cond: (s1.t1.c1 = s1.t4.c1)
+ Merge Cond: (t1_1.c1 = t2_1.c1)
-> Merge Join
- Merge Cond: (s1.t1.c1 = s1.t3.c1)
- -> Index Scan using t1_i1 on t1
- -> Index Scan using t3_i1 on t3
- -> Index Scan using t4_i1 on t4
- -> Sort
- Sort Key: s1.t2.c1
- -> Seq Scan on t2
+ Merge Cond: (t1_1.c1 = t3_1.c1)
+ -> Index Only Scan using t1_i1 on t1 t1_1
+ -> Index Only Scan using t3_i1 on t3 t3_1
+ -> Sort
+ Sort Key: t2_1.c1
+ -> Seq Scan on t2 t2_1
+ -> Index Only Scan using t4_i1 on t4 t4_1
+ Index Cond: (c1 = t1_1.c1)
-> Merge Join
- Merge Cond: (s1.t1.c1 = s1.t4.c1)
+ Merge Cond: (t1.c1 = t2.c1)
-> Merge Join
- Merge Cond: (s1.t1.c1 = s1.t3.c1)
+ Merge Cond: (t1.c1 = t3.c1)
-> Index Scan using t1_i1 on t1
-> Index Scan using t3_i1 on t3
- -> Index Scan using t4_i1 on t4
- -> Sort
- Sort Key: s1.t2.c1
- -> Seq Scan on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t1.c1)
(26 rows)
/*+Leading(t4 t2 t3 t1)*/
duplication hint:
error hint:
- QUERY PLAN
---------------------------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------------------------------
Merge Join
- Merge Cond: (s1.t1.c1 = s1.t2.c1)
- InitPlan 1 (returns $0)
+ Merge Cond: (t1.c1 = t2.c1)
+ InitPlan 1 (returns $1)
-> Aggregate
-> Merge Join
- Merge Cond: (s1.t1.c1 = s1.t2.c1)
- -> Index Scan using t1_i1 on t1
+ Merge Cond: (t1_1.c1 = t2_1.c1)
+ -> Index Only Scan using t1_i1 on t1 t1_1
-> Sort
- Sort Key: s1.t2.c1
- -> Hash Join
- Hash Cond: (s1.t3.c1 = s1.t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (s1.t4.c1 = s1.t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ Sort Key: t2_1.c1
+ -> Nested Loop
+ Join Filter: (t2_1.c1 = t3_1.c1)
+ -> Hash Join
+ Hash Cond: (t4_1.c1 = t2_1.c1)
+ -> Seq Scan on t4 t4_1
+ -> Hash
+ -> Seq Scan on t2 t2_1
+ -> Index Only Scan using t3_i1 on t3 t3_1
+ Index Cond: (c1 = t4_1.c1)
-> Index Scan using t1_i1 on t1
-> Sort
- Sort Key: s1.t2.c1
- -> Hash Join
- Hash Cond: (s1.t3.c1 = s1.t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (s1.t4.c1 = s1.t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ Sort Key: t2.c1
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(30 rows)
-/*+Leading(st1 st2 st3 st4 t4 t2 t3 t1)*/
+/*+Leading(st1 st2 st3 st4)Leading(t4 t2 t3 t1)*/
EXPLAIN (COSTS false) SELECT *, (SELECT max(st1.c1) FROM s1.t1 st1, s1.t2 st2, s1.t3 st3, s1.t4 st4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1) FROM s1.t1, s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
LOG: pg_hint_plan:
used hint:
-Leading(st1 st2 st3 st4 t4 t2 t3 t1)
+Leading(st1 st2 st3 st4)
+Leading(t4 t2 t3 t1)
not used hint:
duplication hint:
error hint:
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
SubPlan 1
-> Aggregate
-> Result
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(14 rows)
-- No. L-1-5-2
/*+Leading(t4 t2 t3 t1 t4)*/
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 "Leading(t4 t2 t3 t1 t4)"
+DETAIL: Relation name "t4" is duplicated.
LOG: pg_hint_plan:
used hint:
-Leading(t4 t2 t3 t1 t4)
not used hint:
duplication hint:
error hint:
+Leading(t4 t2 t3 t1 t4)
- QUERY PLAN
-------------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
-(14 rows)
+ 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)
/*+Leading(t4 t2 t3 t4)*/
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: hint syntax error at or near "Leading(t4 t2 t3 t4)"
-DETAIL: Relation name "t4" is duplicate.
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t4 t2 t3 t4)"
+DETAIL: Relation name "t4" is duplicated.
LOG: pg_hint_plan:
used hint:
not used hint:
QUERY PLAN
------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
+ Nested Loop
-> Merge Join
- Merge Cond: (t1.c1 = t4.c1)
+ 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
- -> Index Scan using t4_i1 on t4
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t1.c1)
(12 rows)
-- No. L-1-5-3
/*+Leading(t4 t2 t3 t1 t4 t2 t3 t1)*/
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 "Leading(t4 t2 t3 t1 t4 t2 t3 t1)"
+DETAIL: Relation name "t4" is duplicated.
LOG: pg_hint_plan:
used hint:
-Leading(t4 t2 t3 t1 t4 t2 t3 t1)
not used hint:
duplication hint:
error hint:
+Leading(t4 t2 t3 t1 t4 t2 t3 t1)
- QUERY PLAN
-------------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
-(14 rows)
+ 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)
/*+Leading(t4 t2 t2 t4)*/
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: hint syntax error at or near "Leading(t4 t2 t2 t4)"
-DETAIL: Relation name "t2" is duplicate.
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t4 t2 t2 t4)"
+DETAIL: Relation name "t2" is duplicated.
LOG: pg_hint_plan:
used hint:
not used hint:
QUERY PLAN
------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
+ Nested Loop
-> Merge Join
- Merge Cond: (t1.c1 = t4.c1)
+ 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
- -> Index Scan using t4_i1 on t4
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t1.c1)
(12 rows)
----
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(14 rows)
-- No. L-1-6-2
EXPLAIN (COSTS false) SELECT * FROM s1.p1 t1, s1.p1 t2, s1.p1 t3, s1.p1 t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
- QUERY PLAN
----------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------
Hash Join
Hash Cond: (t1.c1 = t4.c1)
-> Hash Join
Hash Cond: (t1.c1 = t2.c1)
-> Append
-> Seq Scan on p1 t1
- -> Seq Scan on p1c1 t1
- -> Seq Scan on p1c2 t1
- -> Seq Scan on p1c3 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
- -> Seq Scan on p1c2 t2
- -> Seq Scan on p1c3 t2
+ -> Seq Scan on p1c1 t2_1
+ -> Seq Scan on p1c2 t2_2
+ -> Seq Scan on p1c3 t2_3
-> Hash
-> Append
-> Seq Scan on p1 t3
- -> Seq Scan on p1c1 t3
- -> Seq Scan on p1c2 t3
- -> Seq Scan on p1c3 t3
+ -> Seq Scan on p1c1 t3_1
+ -> Seq Scan on p1c2 t3_2
+ -> Seq Scan on p1c3 t3_3
-> Hash
-> Append
-> Seq Scan on p1 t4
- -> Seq Scan on p1c1 t4
- -> Seq Scan on p1c2 t4
- -> Seq Scan on p1c3 t4
+ -> Seq Scan on p1c1 t4_1
+ -> Seq Scan on p1c2 t4_2
+ -> Seq Scan on p1c3 t4_3
(29 rows)
/*+Leading(t4 t3 t2 t1)*/
duplication hint:
error hint:
- QUERY PLAN
----------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------
Hash Join
Hash Cond: (t2.c1 = t1.c1)
-> Hash Join
Hash Cond: (t3.c1 = t4.c1)
-> Append
-> Seq Scan on p1 t3
- -> Seq Scan on p1c1 t3
- -> Seq Scan on p1c2 t3
- -> Seq Scan on p1c3 t3
+ -> Seq Scan on p1c1 t3_1
+ -> Seq Scan on p1c2 t3_2
+ -> Seq Scan on p1c3 t3_3
-> Hash
-> Append
-> Seq Scan on p1 t4
- -> Seq Scan on p1c1 t4
- -> Seq Scan on p1c2 t4
- -> Seq Scan on p1c3 t4
+ -> Seq Scan on p1c1 t4_1
+ -> Seq Scan on p1c2 t4_2
+ -> Seq Scan on p1c3 t4_3
-> Hash
-> Append
-> Seq Scan on p1 t2
- -> Seq Scan on p1c1 t2
- -> Seq Scan on p1c2 t2
- -> Seq Scan on p1c3 t2
+ -> Seq Scan on p1c1 t2_1
+ -> Seq Scan on p1c2 t2_2
+ -> Seq Scan on p1c3 t2_3
-> Hash
-> Append
-> Seq Scan on p1 t1
- -> Seq Scan on p1c1 t1
- -> Seq Scan on p1c2 t1
- -> Seq Scan on p1c3 t1
+ -> Seq Scan on p1c1 t1_1
+ -> Seq Scan on p1c2 t1_2
+ -> Seq Scan on p1c3 t1_3
(29 rows)
-- No. L-1-6-3
-- No. L-1-6-4
CREATE TEMP TABLE tm1 (LIKE s1.t1 INCLUDING ALL);
-NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "tm1_pkey" for table "tm1"
EXPLAIN (COSTS false) SELECT * FROM tm1 t1, tm1 t2, tm1 t3, tm1 t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
QUERY PLAN
--------------------------------------------
(13 rows)
-- No. L-1-6-6
--- refer fdw.sql
+-- refer ut-fdw.sql
-- No. L-1-6-7
EXPLAIN (COSTS false) SELECT * FROM s1.f1() t1, s1.f1() t2, s1.f1() t3, s1.f1() t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
QUERY PLAN
(10 rows)
-- No. L-1-6-8
-EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1')) AS t1 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t2 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3')) AS t3 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3'), (4,4,4,'4')) AS t4 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
- QUERY PLAN
---------------------------------------------------------------------------
+EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t1 (c1, c2, c3, c4), s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
+ QUERY PLAN
+-------------------------------------------------------
Nested Loop
- Join Filter: ("*VALUES*".column1 = "*VALUES*".column1)
- -> Hash Join
- Hash Cond: ("*VALUES*".column1 = "*VALUES*".column1)
- -> Values Scan on "*VALUES*"
- -> Hash
- -> Hash Join
- Hash Cond: ("*VALUES*".column1 = "*VALUES*".column1)
+ Join Filter: ("*VALUES*".column1 = t4.c1)
+ -> Nested Loop
+ Join Filter: ("*VALUES*".column1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t2.c1 = "*VALUES*".column1)
+ -> Seq Scan on t2
+ -> Hash
-> Values Scan on "*VALUES*"
- -> Hash
- -> Values Scan on "*VALUES*"
- -> Values Scan on "*VALUES*"
-(12 rows)
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t2.c1)
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t3.c1)
+(13 rows)
/*+Leading(t4 t3 t2 t1)*/
-EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1')) AS t1 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t2 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3')) AS t3 (c1, c2, c3, c4), (VALUES(1,1,1,'1'), (2,2,2,'2'), (3,3,3,'3'), (4,4,4,'4')) AS t4 (c1, c2, c3, c4) WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
+EXPLAIN (COSTS false) SELECT * FROM (VALUES(1,1,1,'1'), (2,2,2,'2')) AS t1 (c1, c2, c3, c4), s1.t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
LOG: pg_hint_plan:
used hint:
not used hint:
duplication hint:
error hint:
- QUERY PLAN
---------------------------------------------------------------------------
+ QUERY PLAN
+-------------------------------------------------------
Nested Loop
- Join Filter: ("*VALUES*".column1 = "*VALUES*".column1)
- -> Hash Join
- Hash Cond: ("*VALUES*".column1 = "*VALUES*".column1)
- -> Values Scan on "*VALUES*"
- -> Hash
- -> Hash Join
- Hash Cond: ("*VALUES*".column1 = "*VALUES*".column1)
+ Join Filter: ("*VALUES*".column1 = t4.c1)
+ -> Nested Loop
+ Join Filter: ("*VALUES*".column1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t2.c1 = "*VALUES*".column1)
+ -> Seq Scan on t2
+ -> Hash
-> Values Scan on "*VALUES*"
- -> Hash
- -> Values Scan on "*VALUES*"
- -> Values Scan on "*VALUES*"
-(12 rows)
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t2.c1)
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t3.c1)
+(13 rows)
-- No. L-1-6-9
EXPLAIN (COSTS false) WITH c1(c1) AS (SELECT st1.c1 FROM s1.t1 st1, s1.t1 st2, s1.t1 st3, s1.t1 st4 WHERE st1.c1 = st2.c1 AND st1.c1 = st3.c1 AND st1.c1 = st4.c1) SELECT * FROM c1 ct1, c1 ct2, c1 ct3, c1 ct4 WHERE ct1.c1 = ct2.c1 AND ct1.c1 = ct3.c1 AND ct1.c1 = ct4.c1;
-> CTE Scan on c1 ct4
(33 rows)
-/*+Leading(ct4 ct3 ct2 ct1 st4 st3 st2 st1)*/
+/*+Leading(ct4 ct3 ct2 ct1)Leading(st4 st3 st2 st1)*/
EXPLAIN (COSTS false) WITH c1(c1) AS (SELECT st1.c1 FROM s1.t1 st1, s1.t1 st2, s1.t1 st3, s1.t1 st4 WHERE st1.c1 = st2.c1 AND st1.c1 = st3.c1 AND st1.c1 = st4.c1) SELECT * FROM c1 ct1, c1 ct2, c1 ct3, c1 ct4 WHERE ct1.c1 = ct2.c1 AND ct1.c1 = ct3.c1 AND ct1.c1 = ct4.c1;
LOG: pg_hint_plan:
used hint:
-Leading(ct4 ct3 ct2 ct1 st4 st3 st2 st1)
+Leading(ct4 ct3 ct2 ct1)
+Leading(st4 st3 st2 st1)
not used hint:
duplication hint:
error hint:
-- No. L-1-6-10
EXPLAIN (COSTS false) SELECT * FROM s1.v1 t1, s1.v1 t2, s1.v1 t3, s1.v1 t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
- QUERY PLAN
-----------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Hash Join
- Hash Cond: (v1t1.c1 = v1t1.c1)
+ Hash Cond: (v1t1.c1 = v1t1_3.c1)
-> Hash Join
- Hash Cond: (v1t1.c1 = v1t1.c1)
+ Hash Cond: (v1t1.c1 = v1t1_2.c1)
-> Hash Join
- Hash Cond: (v1t1.c1 = v1t1.c1)
+ Hash Cond: (v1t1.c1 = v1t1_1.c1)
-> Seq Scan on t1 v1t1
-> Hash
- -> Seq Scan on t1 v1t1
+ -> Seq Scan on t1 v1t1_1
-> Hash
- -> Seq Scan on t1 v1t1
+ -> Seq Scan on t1 v1t1_2
-> Hash
- -> Seq Scan on t1 v1t1
+ -> Seq Scan on t1 v1t1_3
(13 rows)
/*+Leading(t4 t3 t2 t1)*/
duplication hint:
error hint:
- QUERY PLAN
-----------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Hash Join
- Hash Cond: (v1t1.c1 = v1t1.c1)
+ Hash Cond: (v1t1.c1 = v1t1_3.c1)
-> Hash Join
- Hash Cond: (v1t1.c1 = v1t1.c1)
+ Hash Cond: (v1t1.c1 = v1t1_2.c1)
-> Hash Join
- Hash Cond: (v1t1.c1 = v1t1.c1)
+ Hash Cond: (v1t1.c1 = v1t1_1.c1)
-> Seq Scan on t1 v1t1
-> Hash
- -> Seq Scan on t1 v1t1
+ -> Seq Scan on t1 v1t1_1
-> Hash
- -> Seq Scan on t1 v1t1
+ -> Seq Scan on t1 v1t1_2
-> Hash
- -> Seq Scan on t1 v1t1
+ -> Seq Scan on t1 v1t1_3
(13 rows)
EXPLAIN (COSTS false) SELECT * FROM s1.v1 t1, s1.v1_ t2, s1.t3, s1.t4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = t4.c1;
EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, (SELECT t4.c1 FROM s1.t4) st4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = st4.c1;
QUERY PLAN
------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
+ Nested Loop
-> Merge Join
- Merge Cond: (t1.c1 = t4.c1)
+ 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
- -> Index Scan using t4_i1 on t4
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Only Scan using t4_i1 on t4
+ Index Cond: (c1 = t1.c1)
(12 rows)
/*+Leading(st4 t2 t3 t1)*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, (SELECT t4.c1 FROM s1.t4) st4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = st4.c1;
LOG: pg_hint_plan:
used hint:
-Leading(st4 t2 t3 t1)
not used hint:
+Leading(st4 t2 t3 t1)
duplication hint:
error hint:
Nested Loop
-> Merge Join
Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
+ -> 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
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Seq Scan on t2
- -> Index Scan using t4_i1 on t4
+ -> Seq Scan on t2
+ -> Index Only Scan using t4_i1 on t4
Index Cond: (c1 = t1.c1)
-(13 rows)
+(12 rows)
/*+Leading(t4 t2 t3 t1)*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, s1.t3, (SELECT t4.c1 FROM s1.t4) st4 WHERE t1.c1 = t2.c1 AND t1.c1 = t3.c1 AND t1.c1 = st4.c1;
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------------
+ QUERY PLAN
+------------------------------------------------
Merge Join
Merge Cond: (t1.c1 = t2.c1)
-> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Hash Join
- Hash Cond: (t4.c1 = t2.c1)
- -> Seq Scan on t4
- -> Hash
- -> Seq Scan on t2
+ -> Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t4.c1)
(14 rows)
----
----- No. L-2-1 complexity query block
+---- No. L-2-1 some complexity query blocks
----
-- No. L-2-1-1
EXPLAIN (COSTS false)
(47 rows)
/*+
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2)
+Leading(bmt1 bmt2 bmt3 bmt4)
+Leading(b1t2 b1t3 b1t4 b1t1)
+Leading(b2t3 b2t4 b2t1 b2t2)
*/
EXPLAIN (COSTS false)
SELECT max(bmt1.c1), (
;
LOG: pg_hint_plan:
used hint:
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2)
+Leading(bmt1 bmt2 bmt3 bmt4)
+Leading(b1t2 b1t3 b1t4 b1t1)
+Leading(b2t3 b2t4 b2t1 b2t2)
not used hint:
duplication hint:
error hint:
(63 rows)
/*+
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2 b3t4 b3t1 b3t2 b3t3)
+Leading(bmt1 bmt2 bmt3 bmt4)
+Leading(b1t2 b1t3 b1t4 b1t1)
+Leading(b2t3 b2t4 b2t1 b2t2)
+Leading(b3t4 b3t1 b3t2 b3t3)
*/
EXPLAIN (COSTS false)
SELECT max(bmt1.c1), (
;
LOG: pg_hint_plan:
used hint:
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2 b3t4 b3t1 b3t2 b3t3)
+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:
-> Nested Loop
Join Filter: (bmt1.c1 = bmt4.c1)
-> Nested Loop
- Join Filter: (bmt1.c1 = bmt2.c1)
+ Join Filter: (bmt1.c1 = bmt3.c1)
-> Nested Loop
- Join Filter: (bmt1.c1 = bmt3.c1)
+ Join Filter: (bmt1.c1 = bmt2.c1)
-> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
Filter: ((c1 <> $0) AND (c1 <> $1))
- -> Tid Scan on t3 bmt3
- TID Cond: (ctid = '(1,1)'::tid)
- -> Seq Scan on t2 bmt2
- Filter: (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)
(48 rows)
/*+
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2)
+Leading(bmt1 bmt2 bmt3 bmt4)
+Leading(b1t2 b1t3 b1t4 b1t1)
+Leading(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)'
;
LOG: pg_hint_plan:
used hint:
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2)
+Leading(bmt1 bmt2 bmt3 bmt4)
+Leading(b1t2 b1t3 b1t4 b1t1)
+Leading(b2t3 b2t4 b2t1 b2t2)
not used hint:
duplication hint:
error hint:
(64 rows)
/*+
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2 b3t4 b3t1 b3t2 b3t3)
+Leading(bmt1 bmt2 bmt3 bmt4)
+Leading(b1t2 b1t3 b1t4 b1t1)
+Leading(b2t3 b2t4 b2t1 b2t2)
+Leading(b3t4 b3t1 b3t2 b3t3)
*/
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)'
;
LOG: pg_hint_plan:
used hint:
-Leading(bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2 b3t4 b3t1 b3t2 b3t3)
+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:
AND bmt1.c1 = c1.c1
AND bmt1.c1 = c2.c1
;
- QUERY PLAN
------------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------
Aggregate
- CTE 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)
- CTE c2
- -> 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 = c2.c1)
+ Join Filter: (bmt1.c1 = (max(b2t1.c1)))
-> Nested Loop
- Join Filter: (bmt1.c1 = c1.c1)
+ Join Filter: (bmt1.c1 = (max(b1t1.c1)))
-> Nested Loop
Join Filter: (bmt1.c1 = bmt4.c1)
-> Nested Loop
TID Cond: (ctid = '(1,1)'::tid)
-> Tid Scan on t4 bmt4
TID Cond: (ctid = '(1,1)'::tid)
- -> CTE Scan on c1
- -> CTE Scan on c2
-(53 rows)
-
-/*+
-Leading(c2 c1 bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 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)'
+ -> 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)
+*/
+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
;
LOG: pg_hint_plan:
used hint:
-Leading(c2 c1 bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2)
+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
--------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------
Aggregate
- CTE c1
- -> Aggregate
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t1.c1)
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t4.c1)
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t3.c1)
- -> 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)
- -> Tid Scan on t1 b1t1
- TID Cond: (ctid = '(1,1)'::tid)
- CTE c2
- -> Aggregate
- -> Nested Loop
- Join Filter: (b2t1.c1 = b2t2.c1)
- -> Nested Loop
- Join Filter: (b2t3.c1 = b2t1.c1)
- -> Nested Loop
- Join Filter: (b2t3.c1 = b2t4.c1)
- -> 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 b2t1
- TID Cond: (ctid = '(1,1)'::tid)
- -> Seq Scan on t2 b2t2
- Filter: (ctid = '(1,1)'::tid)
-> Nested Loop
Join Filter: (bmt1.c1 = bmt4.c1)
-> Nested Loop
-> Nested Loop
Join Filter: (bmt1.c1 = bmt2.c1)
-> Nested Loop
- Join Filter: (c1.c1 = bmt1.c1)
- -> Nested Loop
- Join Filter: (c1.c1 = c2.c1)
- -> CTE Scan on c1
- -> CTE Scan on c2
+ 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: (b1t2.c1 = b1t1.c1)
+ -> Nested Loop
+ Join Filter: (b1t2.c1 = b1t4.c1)
+ -> Nested Loop
+ Join Filter: (b1t2.c1 = b1t3.c1)
+ -> 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)
+ -> 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)
+ -> Nested Loop
+ Join Filter: (b2t3.c1 = b2t1.c1)
+ -> Nested Loop
+ Join Filter: (b2t3.c1 = b2t4.c1)
+ -> 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 b2t1
+ TID Cond: (ctid = '(1,1)'::tid)
+ -> Seq Scan on t2 b2t2
+ Filter: (ctid = '(1,1)'::tid)
-> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
-> Seq Scan on t2 bmt2
AND bmt1.c1 = c2.c1
AND bmt1.c1 = c3.c1
;
- QUERY PLAN
------------------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------
Aggregate
- CTE 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)
- CTE c2
- -> 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)
- CTE c3
- -> 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 = c3.c1)
+ Join Filter: (bmt1.c1 = (max(b3t1.c1)))
-> Nested Loop
- Join Filter: (bmt1.c1 = c2.c1)
+ Join Filter: (bmt1.c1 = bmt4.c1)
-> Nested Loop
- Join Filter: (bmt1.c1 = c1.c1)
+ Join Filter: (bmt1.c1 = bmt3.c1)
-> Nested Loop
- Join Filter: (bmt1.c1 = bmt4.c1)
+ Join Filter: (bmt1.c1 = bmt2.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
+ 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)
- -> Tid Scan on t4 bmt4
+ -> 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)
- -> CTE Scan on c1
- -> CTE Scan on c2
- -> CTE Scan on c3
-(72 rows)
+ -> Tid Scan on t4 b3t4
+ TID Cond: (ctid = '(1,1)'::tid)
+(70 rows)
/*+
-Leading(c3 c2 c1 bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2 b3t4 b3t1 b3t2 b3t3)
+Leading(c3 c2 c1 bmt1 bmt2 bmt3 bmt4)
+Leading(b1t2 b1t3 b1t4 b1t1)
+Leading(b2t3 b2t4 b2t1 b2t2)
+Leading(b3t4 b3t1 b3t2 b3t3)
*/
EXPLAIN (COSTS false)
WITH c1 (c1) AS (
;
LOG: pg_hint_plan:
used hint:
-Leading(c3 c2 c1 bmt1 bmt2 bmt3 bmt4 b1t2 b1t3 b1t4 b1t1 b2t3 b2t4 b2t1 b2t2 b3t4 b3t1 b3t2 b3t3)
+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
---------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------
Aggregate
- CTE c1
- -> Aggregate
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t1.c1)
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t4.c1)
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t3.c1)
- -> 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)
- -> Tid Scan on t1 b1t1
- TID Cond: (ctid = '(1,1)'::tid)
- CTE c2
- -> Aggregate
- -> Nested Loop
- Join Filter: (b2t1.c1 = b2t2.c1)
- -> Nested Loop
- Join Filter: (b2t3.c1 = b2t1.c1)
- -> Nested Loop
- Join Filter: (b2t3.c1 = b2t4.c1)
- -> 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 b2t1
- TID Cond: (ctid = '(1,1)'::tid)
- -> Seq Scan on t2 b2t2
- Filter: (ctid = '(1,1)'::tid)
- CTE c3
- -> Aggregate
- -> Nested Loop
- Join Filter: (b3t1.c1 = b3t3.c1)
- -> Nested Loop
- Join Filter: (b3t1.c1 = b3t2.c1)
- -> Nested Loop
- Join Filter: (b3t1.c1 = b3t4.c1)
- -> Tid Scan on t1 b3t1
- TID Cond: (ctid = '(1,1)'::tid)
- -> Tid Scan on t4 b3t4
- 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)
-> Nested Loop
Join Filter: (bmt1.c1 = bmt4.c1)
-> Nested Loop
-> Nested Loop
Join Filter: (bmt1.c1 = bmt2.c1)
-> Nested Loop
- Join Filter: (c1.c1 = bmt1.c1)
+ Join Filter: ((max(b1t1.c1)) = bmt1.c1)
-> Nested Loop
- Join Filter: (c2.c1 = c1.c1)
- -> Nested Loop
- Join Filter: (c2.c1 = c3.c1)
- -> CTE Scan on c2
- -> CTE Scan on c3
- -> CTE Scan on c1
+ Join Filter: ((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)
+ -> Nested Loop
+ Join Filter: (b2t3.c1 = b2t1.c1)
+ -> Nested Loop
+ Join Filter: (b2t3.c1 = b2t4.c1)
+ -> 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 b2t1
+ 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)
+ -> Nested Loop
+ Join Filter: (b3t1.c1 = b3t2.c1)
+ -> Nested Loop
+ Join Filter: (b3t1.c1 = b3t4.c1)
+ -> Tid Scan on t1 b3t1
+ TID Cond: (ctid = '(1,1)'::tid)
+ -> Tid Scan on t4 b3t4
+ 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)
+ -> Aggregate
+ -> Nested Loop
+ Join Filter: (b1t2.c1 = b1t1.c1)
+ -> Nested Loop
+ Join Filter: (b1t2.c1 = b1t4.c1)
+ -> Nested Loop
+ Join Filter: (b1t2.c1 = b1t3.c1)
+ -> 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)
+ -> Tid Scan on t1 b1t1
+ TID Cond: (ctid = '(1,1)'::tid)
-> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
-> Seq Scan on t2 bmt2
TID Cond: (ctid = '(1,1)'::tid)
-> Tid Scan on t4 bmt4
TID Cond: (ctid = '(1,1)'::tid)
-(72 rows)
+(70 rows)
----
---- No. L-2-2 the number of the tables per quiry block
QUERY PLAN
-----------------------------------------------------------------
Aggregate
- CTE c1
+ InitPlan 2 (returns $1)
-> Result
InitPlan 1 (returns $0)
-> Limit
- -> Tid Scan on t1 b1t1
+ -> 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 b2t1
- TID Cond: (ctid = '(1,1)'::tid)
- Filter: ((c1 IS NOT NULL) AND (c1 = 1))
- InitPlan 6 (returns $5)
- -> Result
- InitPlan 5 (returns $4)
- -> 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 <> $5) AND (c1 = 1))
- -> CTE Scan on c1
-(27 rows)
+ Filter: ((c1 <> $3) AND (c1 = 1))
+ -> Result
+(20 rows)
/*+
-Leading(c1 bmt1 b1t1 b2t1 b3t1)
+Leading(c1 bmt1)
*/
EXPLAIN (COSTS false)
WITH c1 (c1) AS (
;
LOG: pg_hint_plan:
used hint:
-Leading(c1 bmt1 b1t1 b2t1 b3t1)
+Leading(c1 bmt1)
not used hint:
duplication hint:
error hint:
QUERY PLAN
-----------------------------------------------------------------
Aggregate
- CTE c1
+ InitPlan 2 (returns $1)
-> Result
InitPlan 1 (returns $0)
-> Limit
- -> Tid Scan on t1 b1t1
+ -> 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 b2t1
- TID Cond: (ctid = '(1,1)'::tid)
- Filter: ((c1 IS NOT NULL) AND (c1 = 1))
- InitPlan 6 (returns $5)
- -> Result
- InitPlan 5 (returns $4)
- -> 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 <> $5) AND (c1 = 1))
- -> CTE Scan on c1
-(27 rows)
+ Filter: ((c1 <> $3) AND (c1 = 1))
+ -> Result
+(20 rows)
-- No. L-2-2-2
EXPLAIN (COSTS false)
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
--------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------
Aggregate
- CTE c1
- -> 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)
- InitPlan 2 (returns $1)
+ InitPlan 1 (returns $0)
-> Aggregate
-> Nested Loop
Join Filter: (b2t1.c1 = b2t2.c1)
TID Cond: (ctid = '(1,1)'::tid)
-> Seq Scan on t2 b2t2
Filter: (ctid = '(1,1)'::tid)
- InitPlan 3 (returns $2)
+ InitPlan 2 (returns $1)
-> Aggregate
-> Nested Loop
Join Filter: (b3t1.c1 = b3t2.c1)
-> Seq Scan on t2 b3t2
Filter: (ctid = '(1,1)'::tid)
-> Nested Loop
- Join Filter: (bmt1.c1 = c1.c1)
+ 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 <> $2)
+ Filter: (c1 <> $1)
-> Seq Scan on t2 bmt2
Filter: (ctid = '(1,1)'::tid)
- -> CTE Scan on c1
-(35 rows)
+ -> 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 b1t2 b2t2 b3t2 bmt1 b1t1 b2t1 b3t1)
+Leading(c1 bmt2 bmt1)
+Leading(b1t2 b1t1)
+Leading(b2t2 b2t1)
+Leading(b3t2 b3t1)
*/
EXPLAIN (COSTS false)
WITH c1 (c1) AS (
;
LOG: pg_hint_plan:
used hint:
-Leading(c1 bmt2 b1t2 b2t2 b3t2 bmt1 b1t1 b2t1 b3t1)
+Leading(c1 bmt2 bmt1)
+Leading(b1t2 b1t1)
+Leading(b2t2 b2t1)
+Leading(b3t2 b3t1)
not used hint:
duplication hint:
error hint:
- QUERY PLAN
--------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------
Aggregate
- CTE c1
- -> 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)
- InitPlan 2 (returns $1)
+ InitPlan 1 (returns $0)
-> Aggregate
-> Nested Loop
Join Filter: (b2t1.c1 = b2t2.c1)
TID Cond: (ctid = '(1,1)'::tid)
-> Seq Scan on t2 b2t2
Filter: (ctid = '(1,1)'::tid)
- InitPlan 3 (returns $2)
+ InitPlan 2 (returns $1)
-> Aggregate
-> Nested Loop
Join Filter: (b3t1.c1 = b3t2.c1)
-> Nested Loop
Join Filter: (bmt2.c1 = bmt1.c1)
-> Nested Loop
- Join Filter: (bmt2.c1 = c1.c1)
+ Join Filter: (bmt2.c1 = (max(b1t1.c1)))
-> Seq Scan on t2 bmt2
Filter: (ctid = '(1,1)'::tid)
- -> CTE Scan on c1
+ -> 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)
-> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
- Filter: (c1 <> $2)
-(35 rows)
+ Filter: (c1 <> $1)
+(33 rows)
-- No. L-2-2-3
EXPLAIN (COSTS false)
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
--------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------
Aggregate
- CTE 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)
- InitPlan 2 (returns $1)
+ InitPlan 1 (returns $0)
-> Aggregate
-> Nested Loop
Join Filter: (b2t1.c1 = b2t4.c1)
TID Cond: (ctid = '(1,1)'::tid)
-> Tid Scan on t4 b2t4
TID Cond: (ctid = '(1,1)'::tid)
- InitPlan 3 (returns $2)
+ InitPlan 2 (returns $1)
-> Aggregate
-> Nested Loop
Join Filter: (b3t1.c1 = b3t4.c1)
-> Tid Scan on t4 b3t4
TID Cond: (ctid = '(1,1)'::tid)
-> Nested Loop
- Join Filter: (bmt1.c1 = c1.c1)
+ Join Filter: (bmt1.c1 = (max(b1t1.c1)))
-> Nested Loop
- Join Filter: (bmt1.c1 = bmt2.c1)
+ Join Filter: (bmt1.c1 = bmt4.c1)
-> Nested Loop
- Join Filter: (bmt3.c1 = bmt1.c1)
+ Join Filter: (bmt1.c1 = bmt3.c1)
-> Nested Loop
- Join Filter: (bmt3.c1 = bmt4.c1)
- -> Tid Scan on t3 bmt3
- TID Cond: (ctid = '(1,1)'::tid)
- -> Tid Scan on t4 bmt4
+ Join Filter: (bmt1.c1 = bmt2.c1)
+ -> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 bmt1
- TID Cond: (ctid = '(1,1)'::tid)
- Filter: (c1 <> $2)
- -> Seq Scan on t2 bmt2
- Filter: (ctid = '(1,1)'::tid)
- -> CTE Scan on c1
-(67 rows)
+ 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 b1t4 b2t4 b3t4 bmt3 b1t3 b2t3 b3t3 bmt2 b1t2 b2t2 b3t2 bmt1 b1t1 b2t1 b3t1)
+Leading(c1 bmt4 bmt3 bmt2 bmt1)
+Leading(b1t4 b1t3 b1t2 b1t1)
+Leading(b2t4 b2t3 b2t2 b2t1)
+Leading(b3t4 b3t3 b3t2 b3t1)
*/
EXPLAIN (COSTS false)
WITH c1 (c1) AS (
;
LOG: pg_hint_plan:
used hint:
-Leading(c1 bmt4 b1t4 b2t4 b3t4 bmt3 b1t3 b2t3 b3t3 bmt2 b1t2 b2t2 b3t2 bmt1 b1t1 b2t1 b3t1)
+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
--------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------------------
Aggregate
- CTE c1
- -> Aggregate
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t1.c1)
- -> Nested Loop
- Join Filter: (b1t3.c1 = b1t2.c1)
- -> Nested Loop
- Join Filter: (b1t3.c1 = b1t4.c1)
- -> Tid Scan on t3 b1t3
- TID Cond: (ctid = '(1,1)'::tid)
- -> Tid Scan on t4 b1t4
- TID Cond: (ctid = '(1,1)'::tid)
- -> Seq Scan on t2 b1t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b1t1
- TID Cond: (ctid = '(1,1)'::tid)
- InitPlan 2 (returns $1)
+ InitPlan 1 (returns $0)
-> Aggregate
-> Nested Loop
Join Filter: (b2t2.c1 = b2t1.c1)
Filter: (ctid = '(1,1)'::tid)
-> Tid Scan on t1 b2t1
TID Cond: (ctid = '(1,1)'::tid)
- InitPlan 3 (returns $2)
+ InitPlan 2 (returns $1)
-> Aggregate
-> Nested Loop
Join Filter: (b3t2.c1 = b3t1.c1)
-> Nested Loop
Join Filter: (bmt4.c1 = bmt3.c1)
-> Nested Loop
- Join Filter: (bmt4.c1 = c1.c1)
+ Join Filter: (bmt4.c1 = (max(b1t1.c1)))
-> Tid Scan on t4 bmt4
TID Cond: (ctid = '(1,1)'::tid)
- -> CTE Scan on c1
+ -> Aggregate
+ -> Nested Loop
+ Join Filter: (b1t2.c1 = b1t1.c1)
+ -> Nested Loop
+ Join Filter: (b1t3.c1 = b1t2.c1)
+ -> Nested Loop
+ Join Filter: (b1t3.c1 = b1t4.c1)
+ -> Tid Scan on t3 b1t3
+ TID Cond: (ctid = '(1,1)'::tid)
+ -> Tid Scan on t4 b1t4
+ TID Cond: (ctid = '(1,1)'::tid)
+ -> Seq Scan on t2 b1t2
+ Filter: (ctid = '(1,1)'::tid)
+ -> Tid Scan on t1 b1t1
+ TID Cond: (ctid = '(1,1)'::tid)
-> Tid Scan on t3 bmt3
TID Cond: (ctid = '(1,1)'::tid)
-> Seq Scan on t2 bmt2
Filter: (ctid = '(1,1)'::tid)
-> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
- Filter: (c1 <> $2)
-(67 rows)
+ Filter: (c1 <> $1)
+(65 rows)
-- No. L-2-2-4
EXPLAIN (COSTS false)
SELECT max(b3t1.c1) FROM s1.t1 b3t1 WHERE b3t1.ctid = '(1,1)'
)
;
- QUERY PLAN
--------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------
Aggregate
- CTE 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)
- InitPlan 3 (returns $2)
+ InitPlan 2 (returns $1)
-> Result
- InitPlan 2 (returns $1)
+ 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)
+ InitPlan 3 (returns $3)
-> Aggregate
-> Tid Scan on t1 b3t1
TID Cond: (ctid = '(1,1)'::tid)
-> Nested Loop
- Join Filter: (bmt1.c1 = c1.c1)
+ Join Filter: (bmt1.c1 = (max(b1t1.c1)))
-> Nested Loop
- Join Filter: (bmt1.c1 = bmt2.c1)
+ Join Filter: (bmt1.c1 = bmt4.c1)
-> Nested Loop
- Join Filter: (bmt3.c1 = bmt1.c1)
+ Join Filter: (bmt1.c1 = bmt3.c1)
-> Nested Loop
- Join Filter: (bmt3.c1 = bmt4.c1)
- -> Tid Scan on t3 bmt3
+ Join Filter: (bmt1.c1 = bmt2.c1)
+ -> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
- -> Tid Scan on t4 bmt4
+ 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 t1 bmt1
+ -> Tid Scan on t4 b1t4
TID Cond: (ctid = '(1,1)'::tid)
- Filter: (c1 <> $3)
- -> Seq Scan on t2 bmt2
- Filter: (ctid = '(1,1)'::tid)
- -> CTE Scan on c1
-(46 rows)
+(44 rows)
/*+
-Leading(c1 bmt4 b1t4 bmt3 b1t3 bmt2 b1t2 bmt1 b1t1 b2t1 b3t1)
+Leading(c1 bmt4 bmt3 bmt2 bmt1)
+Leading(b1t4 b1t3 b1t2 b1t1)
*/
EXPLAIN (COSTS false)
WITH c1 (c1) AS (
;
LOG: pg_hint_plan:
used hint:
-Leading(c1 bmt4 b1t4 bmt3 b1t3 bmt2 b1t2 bmt1 b1t1 b2t1 b3t1)
+Leading(c1 bmt4 bmt3 bmt2 bmt1)
+Leading(b1t4 b1t3 b1t2 b1t1)
not used hint:
duplication hint:
error hint:
- QUERY PLAN
--------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------------------
Aggregate
- CTE c1
- -> Aggregate
- -> Nested Loop
- Join Filter: (b1t2.c1 = b1t1.c1)
- -> Nested Loop
- Join Filter: (b1t3.c1 = b1t2.c1)
- -> Nested Loop
- Join Filter: (b1t3.c1 = b1t4.c1)
- -> Tid Scan on t3 b1t3
- TID Cond: (ctid = '(1,1)'::tid)
- -> Tid Scan on t4 b1t4
- TID Cond: (ctid = '(1,1)'::tid)
- -> Seq Scan on t2 b1t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b1t1
- TID Cond: (ctid = '(1,1)'::tid)
- InitPlan 3 (returns $2)
+ InitPlan 2 (returns $1)
-> Result
- InitPlan 2 (returns $1)
+ 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)
+ InitPlan 3 (returns $3)
-> Aggregate
-> Tid Scan on t1 b3t1
TID Cond: (ctid = '(1,1)'::tid)
-> Nested Loop
Join Filter: (bmt4.c1 = bmt3.c1)
-> Nested Loop
- Join Filter: (bmt4.c1 = c1.c1)
+ Join Filter: (bmt4.c1 = (max(b1t1.c1)))
-> Tid Scan on t4 bmt4
TID Cond: (ctid = '(1,1)'::tid)
- -> CTE Scan on c1
+ -> Aggregate
+ -> Nested Loop
+ Join Filter: (b1t2.c1 = b1t1.c1)
+ -> Nested Loop
+ Join Filter: (b1t3.c1 = b1t2.c1)
+ -> Nested Loop
+ Join Filter: (b1t3.c1 = b1t4.c1)
+ -> Tid Scan on t3 b1t3
+ TID Cond: (ctid = '(1,1)'::tid)
+ -> Tid Scan on t4 b1t4
+ TID Cond: (ctid = '(1,1)'::tid)
+ -> Seq Scan on t2 b1t2
+ Filter: (ctid = '(1,1)'::tid)
+ -> Tid Scan on t1 b1t1
+ TID Cond: (ctid = '(1,1)'::tid)
-> Tid Scan on t3 bmt3
TID Cond: (ctid = '(1,1)'::tid)
-> Seq Scan on t2 bmt2
-> Tid Scan on t1 bmt1
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 <> $3)
-(46 rows)
+(44 rows)
----
----- No. L-2-3 RULE definition table
+---- No. L-2-3 RULE or VIEW
----
-- No. L-2-3-1
EXPLAIN (COSTS false) UPDATE s1.r1 SET c1 = c1 WHERE c1 = 1 AND ctid = '(1,1)';
-> Nested Loop
Join Filter: (t1.c1 = t3.c1)
-> Nested Loop
- Join Filter: (t2.c1 = t1.c1)
+ Join Filter: (t1.c1 = t2.c1)
-> Nested Loop
-> Tid Scan on r1
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (b1t1.c1 = b1t3.c1)
-> Nested Loop
- Join Filter: (b1t2.c1 = b1t1.c1)
+ Join Filter: (b1t1.c1 = b1t2.c1)
-> Nested Loop
-> Tid Scan on r1_
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2 b1t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b1t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (t1.c1 = t3.c1)
-> Nested Loop
- Join Filter: (t2.c1 = t1.c1)
+ Join Filter: (t1.c1 = t2.c1)
-> Nested Loop
-> Tid Scan on r2
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (t1.c1 = t3.c1)
-> Nested Loop
- Join Filter: (t2.c1 = t1.c1)
+ Join Filter: (t1.c1 = t2.c1)
-> Nested Loop
-> Tid Scan on r2
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (b1t1.c1 = b1t3.c1)
-> Nested Loop
- Join Filter: (b1t2.c1 = b1t1.c1)
+ Join Filter: (b1t1.c1 = b1t2.c1)
-> Nested Loop
-> Tid Scan on r2_
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2 b1t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b1t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (b2t1.c1 = b2t3.c1)
-> Nested Loop
- Join Filter: (b2t2.c1 = b2t1.c1)
+ Join Filter: (b2t1.c1 = b2t2.c1)
-> Nested Loop
-> Tid Scan on r2_
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2 b2t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b2t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-b2t1 b2t2 b2t3 b2t4 r2_
-) */
+/*+
+Leading(b1t1 b1t2 b1t3 b1t4 r2_)
+Leading(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:
-Leading(b1t1 b1t2 b1t3 b1t4 b2t1 b2t2 b2t3 b2t4 r2_)
+Leading(b1t1 b1t2 b1t3 b1t4 r2_)
not used hint:
+Leading(b2t1 b2t2 b2t3 b2t4 r2_)
duplication hint:
error hint:
LOG: pg_hint_plan:
used hint:
-Leading(b1t1 b1t2 b1t3 b1t4 b2t1 b2t2 b2t3 b2t4 r2_)
+Leading(b2t1 b2t2 b2t3 b2t4 r2_)
not used hint:
+Leading(b1t1 b1t2 b1t3 b1t4 r2_)
duplication hint:
error hint:
-> Nested Loop
Join Filter: (t1.c1 = t3.c1)
-> Nested Loop
- Join Filter: (t2.c1 = t1.c1)
+ Join Filter: (t1.c1 = t2.c1)
-> Nested Loop
-> Tid Scan on r3
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (t1.c1 = t3.c1)
-> Nested Loop
- Join Filter: (t2.c1 = t1.c1)
+ Join Filter: (t1.c1 = t2.c1)
-> Nested Loop
-> Tid Scan on r3
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (t1.c1 = t3.c1)
-> Nested Loop
- Join Filter: (t2.c1 = t1.c1)
+ Join Filter: (t1.c1 = t2.c1)
-> Nested Loop
-> Tid Scan on r3
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (b1t1.c1 = b1t3.c1)
-> Nested Loop
- Join Filter: (b1t2.c1 = b1t1.c1)
+ Join Filter: (b1t1.c1 = b1t2.c1)
-> Nested Loop
-> Tid Scan on r3_
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2 b1t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b1t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (b2t1.c1 = b2t3.c1)
-> Nested Loop
- Join Filter: (b2t2.c1 = b2t1.c1)
+ Join Filter: (b2t1.c1 = b2t2.c1)
-> Nested Loop
-> Tid Scan on r3_
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2 b2t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b2t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-> Nested Loop
Join Filter: (b3t1.c1 = b3t3.c1)
-> Nested Loop
- Join Filter: (b3t2.c1 = b3t1.c1)
+ Join Filter: (b3t1.c1 = b3t2.c1)
-> Nested Loop
-> Tid Scan on r3_
TID Cond: (ctid = '(1,1)'::tid)
Filter: (c1 = 1)
- -> Seq Scan on t2 b3t2
- Filter: (ctid = '(1,1)'::tid)
- -> Tid Scan on t1 b3t1
- TID Cond: (ctid = '(1,1)'::tid)
+ -> 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
-b2t1 b2t2 b2t3 b2t4
-b3t1 b3t2 b3t3 b3t4 r3_
-) */
+/*+
+Leading(b1t1 b1t2 b1t3 b1t4 r3_)
+Leading(b2t1 b2t2 b2t3 b2t4 r3_)
+Leading(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:
-Leading(b1t1 b1t2 b1t3 b1t4 b2t1 b2t2 b2t3 b2t4 b3t1 b3t2 b3t3 b3t4 r3_)
+Leading(b1t1 b1t2 b1t3 b1t4 r3_)
not used hint:
+Leading(b2t1 b2t2 b2t3 b2t4 r3_)
+Leading(b3t1 b3t2 b3t3 b3t4 r3_)
duplication hint:
error hint:
LOG: pg_hint_plan:
used hint:
-Leading(b1t1 b1t2 b1t3 b1t4 b2t1 b2t2 b2t3 b2t4 b3t1 b3t2 b3t3 b3t4 r3_)
+Leading(b2t1 b2t2 b2t3 b2t4 r3_)
not used hint:
+Leading(b1t1 b1t2 b1t3 b1t4 r3_)
+Leading(b3t1 b3t2 b3t3 b3t4 r3_)
duplication hint:
error hint:
LOG: pg_hint_plan:
used hint:
-Leading(b1t1 b1t2 b1t3 b1t4 b2t1 b2t2 b2t3 b2t4 b3t1 b3t2 b3t3 b3t4 r3_)
+Leading(b3t1 b3t2 b3t3 b3t4 r3_)
not used hint:
+Leading(b1t1 b1t2 b1t3 b1t4 r3_)
+Leading(b2t1 b2t2 b2t3 b2t4 r3_)
duplication hint:
error hint:
Filter: (c1 = 1)
(59 rows)
-----
----- No. L-2-4 VALUES clause
-----
--- No. L-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
--------------------------------------------------------
- Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t2.c1 = "*VALUES*".column1)
- -> Seq Scan on t2
- -> Hash
- -> Values Scan on "*VALUES*"
-(10 rows)
+-- No. L-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)
-/*+ Leading(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;
+/*+Leading(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 "Leading(v1t1 v1t1)"
+DETAIL: Relation name "v1t1" is ambiguous.
LOG: pg_hint_plan:
used hint:
-Leading(t3 t1 t2)
not used hint:
duplication hint:
error hint:
+Leading(v1t1 v1t1)
- QUERY PLAN
----------------------------------------------
- Nested Loop
- Join Filter: (t1.c1 = "*VALUES*".column1)
- -> Values Scan on "*VALUES*"
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
-(9 rows)
+ 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)
-/*+ Leading(*VALUES* 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;
+-- No. L-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)
+
+/*+Leading(v1t1 v1t1_)*/
+EXPLAIN (COSTS false) SELECT * FROM s1.v1 v1, s1.v1_ v2 WHERE v1.c1 = v2.c1;
LOG: pg_hint_plan:
used hint:
-Leading(*VALUES* t1 t2)
+Leading(v1t1 v1t1_)
not used hint:
duplication hint:
error hint:
- QUERY PLAN
------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------
Hash Join
- Hash Cond: (t2.c1 = t1.c1)
- -> Seq Scan on t2
+ Hash Cond: (v1t1.c1 = v1t1_.c1)
+ -> Seq Scan on t1 v1t1
-> Hash
- -> Nested Loop
- -> Values Scan on "*VALUES*"
- -> Index Scan using t1_i1 on t1
- Index Cond: (c1 = "*VALUES*".column1)
-(8 rows)
+ -> Seq Scan on t1 v1t1_
+(5 rows)
--- No. L-2-4-2
-EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1')) 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
- Join Filter: (t1.c1 = "*VALUES*".column1)
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t2.c1 = "*VALUES*".column1)
- -> Seq Scan on t2
- -> Hash
- -> Values Scan on "*VALUES*"
- -> Values Scan on "*VALUES*"
-(13 rows)
+-- No. L-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)
-/*+ Leading(t4 t3 t2 t1) */
-EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1')) 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;
+/*+Leading(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 "Leading(r4t1 r4t1)"
+DETAIL: Relation name "r4t1" is ambiguous.
LOG: pg_hint_plan:
used hint:
-Leading(t4 t3 t2 t1)
not used hint:
duplication hint:
error hint:
+Leading(r4t1 r4t1)
- QUERY PLAN
-----------------------------------------------------------------
- Nested Loop
- Join Filter: (t1.c1 = "*VALUES*".column1)
- -> Nested Loop
- Join Filter: ("*VALUES*".column1 = "*VALUES*".column1)
- -> Values Scan on "*VALUES*"
- -> Values Scan on "*VALUES*"
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
-(12 rows)
+ 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)
-/*+ Leading(*VALUES* t3 t2 t1) */
-EXPLAIN (COSTS false) SELECT * FROM s1.t1, s1.t2, (VALUES(1,1,1,'1')) 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: hint syntax error at or near "Leading(*VALUES* t3 t2 t1) "
-DETAIL: Relation name "*VALUES*" is ambiguous.
+-- No. L-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)
+
+/*+Leading(r4t1 r5t1)*/
+EXPLAIN (COSTS false) SELECT * FROM s1.r4 t1, s1.r5 t2 WHERE t1.c1 = t2.c1;
LOG: pg_hint_plan:
used hint:
+Leading(r4t1 r5t1)
not used hint:
-Leading(*VALUES* t3 t2 t1)
duplication hint:
error hint:
- QUERY PLAN
--------------------------------------------------------------
- Nested Loop
- Join Filter: (t1.c1 = "*VALUES*".column1)
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Hash Join
- Hash Cond: (t2.c1 = "*VALUES*".column1)
- -> Seq Scan on t2
- -> Hash
- -> Values Scan on "*VALUES*"
- -> Values Scan on "*VALUES*"
-(13 rows)
+ QUERY PLAN
+----------------------------------
+ Hash Join
+ Hash Cond: (r4t1.c1 = r5t1.c1)
+ -> Seq Scan on t1 r4t1
+ -> Hash
+ -> Seq Scan on t1 r5t1
+(5 rows)
+
+----
+---- No. L-2-4 VALUES clause
+----
+-- No. L-2-4-1
+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;
+ QUERY PLAN
+-------------------------------------------------
+ Nested Loop
+ -> Hash Join
+ Hash Cond: (t2.c1 = "*VALUES*".column1)
+ -> Seq Scan on t2
+ -> Hash
+ -> Values Scan on "*VALUES*"
+ -> Index Scan using t1_i1 on t1
+ Index Cond: (c1 = t2.c1)
+(8 rows)
+
+/*+ Leading(t3 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:
+not used hint:
+Leading(t3 t1 t2)
+duplication hint:
+error hint:
+
+ QUERY PLAN
+-------------------------------------------------
+ Nested Loop
+ -> Hash Join
+ Hash Cond: (t2.c1 = "*VALUES*".column1)
+ -> Seq Scan on t2
+ -> Hash
+ -> Values Scan on "*VALUES*"
+ -> Index Scan using t1_i1 on t1
+ Index Cond: (c1 = t2.c1)
+(8 rows)
+
+/*+ Leading(*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:
+Leading(*VALUES* t1 t2)
+not used hint:
+duplication hint:
+error hint:
+
+ QUERY PLAN
+-----------------------------------------------------
+ Nested Loop
+ -> Nested Loop
+ -> Values Scan on "*VALUES*"
+ -> Index Scan using t1_i1 on t1
+ Index Cond: (c1 = "*VALUES*".column1)
+ -> Index Scan using t2_i1 on t2
+ Index Cond: (c1 = t1.c1)
+(7 rows)
+
+-- No. L-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) */
+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:
+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) */
+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 "Leading(*VALUES* t3 t2 t1) "
+DETAIL: Relation name "*VALUES*" is ambiguous.
+LOG: pg_hint_plan:
+used hint:
+not used hint:
+duplication hint:
+error hint:
+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. L-3-1 leading the order of table joins
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------
- Hash Join
- Hash Cond: (t3.c1 = t1.c1)
- -> Seq Scan on t3
- -> Hash
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
-(10 rows)
+ QUERY PLAN
+------------------------------------------
+ Nested Loop
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
+(9 rows)
----
---- No. L-3-2 GUC parameter to disable hints
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------
- Hash Join
- Hash Cond: (t3.c1 = t1.c1)
- -> Seq Scan on t3
- -> Hash
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
-(10 rows)
+ QUERY PLAN
+------------------------------------------
+ Nested Loop
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
+(9 rows)
Reset geqo_threshold;
-- No. L-3-2-3
EXPLAIN (COSTS false) SELECT * FROM s1.t3
JOIN s1.t2 ON (t3.c1 = t2.c1)
JOIN s1.t1 ON (t1.c1 = t3.c1);
- QUERY PLAN
-------------------------------------------------
- Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
+ QUERY PLAN
+------------------------------------------
+ Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
(10 rows)
/*+Leading(t1 t2 t3)*/
duplication hint:
error hint:
- QUERY PLAN
-------------------------------------------------
- Hash Join
- Hash Cond: (t3.c1 = t2.c1)
- -> Seq Scan on t3
- -> Hash
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
+ QUERY PLAN
+------------------------------------------
+ Nested Loop
+ Join Filter: (t2.c1 = t3.c1)
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
(10 rows)
Reset join_collapse_limit;
duplication hint:
error hint:
- QUERY PLAN
------------------------------------------------
+ QUERY PLAN
+-------------------------------------------------
Hash Join
Hash Cond: (t1.c1 = t3.c1)
-> Hash Join
Hash Cond: (t1.c1 = t2.c1)
-> Append
-> Seq Scan on p2c1 t1
- -> Seq Scan on p2c1c1 t1
- -> Seq Scan on p2c1c2 t1
+ -> Seq Scan on p2c1c1 t1_1
+ -> Seq Scan on p2c1c2 t1_2
-> Hash
-> Append
-> Seq Scan on p2c2 t2
- -> Seq Scan on p2c2c1 t2
- -> Seq Scan on p2c2c2 t2
+ -> Seq Scan on p2c2c1 t2_1
+ -> Seq Scan on p2c2c2 t2_2
-> Hash
-> Append
-> Seq Scan on p2c3 t3
- -> Seq Scan on p2c3c1 t3
- -> Seq Scan on p2c3c2 t3
+ -> Seq Scan on p2c3c1 t3_1
+ -> Seq Scan on p2c3c2 t3_2
(18 rows)
-- No. L-3-3-2
duplication hint:
error hint:
- QUERY PLAN
------------------------------------------------
+ QUERY PLAN
+-------------------------------------------------
Hash Join
Hash Cond: (t1.c1 = t3.c1)
-> Hash Join
Hash Cond: (t1.c1 = t2.c1)
-> Append
-> Seq Scan on p2c1 t1
- -> Seq Scan on p2c1c1 t1
- -> Seq Scan on p2c1c2 t1
+ -> Seq Scan on p2c1c1 t1_1
+ -> Seq Scan on p2c1c2 t1_2
-> Hash
-> Append
-> Seq Scan on p2c2 t2
- -> Seq Scan on p2c2c1 t2
- -> Seq Scan on p2c2c2 t2
+ -> Seq Scan on p2c2c1 t2_1
+ -> Seq Scan on p2c2c2 t2_2
-> Hash
-> Append
-> Seq Scan on p2c3 t3
- -> Seq Scan on p2c3c1 t3
- -> Seq Scan on p2c3c2 t3
+ -> Seq Scan on p2c3c1 t3_1
+ -> Seq Scan on p2c3c2 t3_2
(18 rows)
----
EXPLAIN (COSTS false) SELECT * FROM s1.t1
JOIN s1.t2 ON (t1.c1 = t2.c1)
JOIN s1.t3 ON (t1.c1 = t3.c1);
-INFO: hint syntax error at or near "Leading(t2 t3 t1)Leading(t1 t2 t3)"
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t2 t3 t1)Leading(t1 t2 t3)"
DETAIL: Conflict leading hint.
LOG: pg_hint_plan:
used hint:
Leading(t2 t3 t1)
error hint:
- QUERY PLAN
-------------------------------------------------
- Hash Join
- Hash Cond: (t3.c1 = t1.c1)
- -> Seq Scan on t3
- -> Hash
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
-(10 rows)
+ QUERY PLAN
+------------------------------------------
+ Nested Loop
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
+(9 rows)
-- No. L-3-4-2
/*+Leading(t3 t1 t2)Leading(t2 t3 t1)Leading(t1 t2 t3)*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1
JOIN s1.t2 ON (t1.c1 = t2.c1)
JOIN s1.t3 ON (t1.c1 = t3.c1);
-INFO: hint syntax error at or near "Leading(t3 t1 t2)Leading(t2 t3 t1)Leading(t1 t2 t3)"
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t3 t1 t2)Leading(t2 t3 t1)Leading(t1 t2 t3)"
DETAIL: Conflict leading hint.
-INFO: hint syntax error at or near "Leading(t2 t3 t1)Leading(t1 t2 t3)"
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t2 t3 t1)Leading(t1 t2 t3)"
DETAIL: Conflict leading hint.
LOG: pg_hint_plan:
used hint:
Leading(t2 t3 t1)
error hint:
- QUERY PLAN
-------------------------------------------------
- Hash Join
- Hash Cond: (t3.c1 = t1.c1)
- -> Seq Scan on t3
- -> Hash
- -> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
- -> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
-(10 rows)
+ QUERY PLAN
+------------------------------------------
+ Nested Loop
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
+(9 rows)
-- No. L-3-4-3
/*+Leading(t2 t3 t1)Leading()*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1
JOIN s1.t2 ON (t1.c1 = t2.c1)
JOIN s1.t3 ON (t1.c1 = t3.c1);
-INFO: hint syntax error at or near "Leading()"
-DETAIL: In Leading hint, specified relation name 2 or more.
-INFO: hint syntax error at or near "Leading(t2 t3 t1)Leading()"
-DETAIL: Conflict leading hint.
+INFO: pg_hint_plan: hint syntax error at or near "Leading()"
+DETAIL: Leading hint requires at least two relations.
LOG: pg_hint_plan:
used hint:
+Leading(t2 t3 t1)
not used hint:
duplication hint:
-Leading(t2 t3 t1)
error hint:
Leading()
------------------------------------------
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
+ -> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Seq Scan on t2
-(9 rows)
+ -> Hash Join
+ Hash Cond: (t3.c1 = t2.c1)
+ -> Seq Scan on t3
+ -> Hash
+ -> Seq Scan on t2
+(10 rows)
-- No. L-3-4-4
/*+Leading(t3 t1 t2)Leading(t2 t3 t1)Leading()*/
EXPLAIN (COSTS false) SELECT * FROM s1.t1
JOIN s1.t2 ON (t1.c1 = t2.c1)
JOIN s1.t3 ON (t1.c1 = t3.c1);
-INFO: hint syntax error at or near "Leading()"
-DETAIL: In Leading hint, specified relation name 2 or more.
-INFO: hint syntax error at or near "Leading(t3 t1 t2)Leading(t2 t3 t1)Leading()"
-DETAIL: Conflict leading hint.
-INFO: hint syntax error at or near "Leading(t2 t3 t1)Leading()"
+INFO: pg_hint_plan: hint syntax error at or near "Leading()"
+DETAIL: Leading hint requires at least two relations.
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t3 t1 t2)Leading(t2 t3 t1)Leading()"
DETAIL: Conflict leading hint.
LOG: pg_hint_plan:
used hint:
+Leading(t2 t3 t1)
not used hint:
duplication hint:
Leading(t3 t1 t2)
-Leading(t2 t3 t1)
error hint:
Leading()
------------------------------------------
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
+ -> Index Scan using t1_i1 on t1
-> Sort
Sort Key: t2.c1
- -> Seq Scan on t2
-(9 rows)
+ -> Hash Join
+ Hash Cond: (t3.c1 = t2.c1)
+ -> Seq Scan on t3
+ -> Hash
+ -> Seq Scan on t2
+(10 rows)
----
---- No. L-3-5 hint state output
EXPLAIN (COSTS false) SELECT * FROM s1.t1
JOIN s1.t2 ON (t1.c1 = t2.c1)
JOIN s1.t3 ON (t1.c1 = t3.c1);
-INFO: hint syntax error at or near "Leading()"
-DETAIL: In Leading hint, specified relation name 2 or more.
+INFO: pg_hint_plan: hint syntax error at or near "Leading()"
+DETAIL: Leading hint requires at least two relations.
LOG: pg_hint_plan:
used hint:
not used hint:
EXPLAIN (COSTS false) SELECT * FROM s1.t1
JOIN s1.t2 ON (t1.c1 = t2.c1)
JOIN s1.t3 ON (t1.c1 = t3.c1);
-INFO: hint syntax error at or near "Leading(t1)"
-DETAIL: In Leading hint, specified relation name 2 or more.
+INFO: pg_hint_plan: hint syntax error at or near "Leading(t1)"
+DETAIL: Leading hint requires at least two relations.
LOG: pg_hint_plan:
used hint:
not used hint:
duplication hint:
error hint:
+ QUERY PLAN
+------------------------------------------
+ Nested Loop
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t1.c1)
+(9 rows)
+
+----
+---- No. L-3-6 specified Inner/Outer side
+----
+-- No. L-3-6-1
+/*+Leading((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 "Leading((t2))"
+DETAIL: Leading hint requires two sets of relations when parentheses nests.
+LOG: pg_hint_plan:
+used hint:
+not used hint:
+duplication hint:
+error hint:
+Leading((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. L-3-6-2
+/*+Leading((t2 t3))*/
+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;
+LOG: pg_hint_plan:
+used hint:
+Leading((t2 t3))
+not used hint:
+duplication hint:
+error hint:
+
QUERY PLAN
------------------------------------------------
+ Nested Loop
+ Join Filter: (t1.c1 = t4.c1)
+ -> Nested Loop
+ Join Filter: (t2.c1 = t1.c1)
+ -> Nested Loop
+ -> Index Scan using t2_i1 on t2
+ -> Index Scan using t3_i1 on t3
+ Index Cond: (c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ Index Cond: (c1 = t3.c1)
+ -> Index Scan using t4_i1 on t4
+ Index Cond: (c1 = t3.c1)
+(12 rows)
+
+-- No. L-3-6-3
+/*+Leading((t2 t3 t4))*/
+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 "Leading((t2 t3 t4))"
+DETAIL: Leading hint requires two sets of relations when parentheses nests.
+LOG: pg_hint_plan:
+used hint:
+not used hint:
+duplication hint:
+error hint:
+Leading((t2 t3 t4))
+
+ 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. L-3-6-4
+/*+Leading(((t1 t2) (t3 t4)))*/
+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;
+LOG: pg_hint_plan:
+used hint:
+Leading(((t1 t2) (t3 t4)))
+not used hint:
+duplication hint:
+error hint:
+
+ QUERY PLAN
+------------------------------------------
Hash Join
- Hash Cond: (t3.c1 = t1.c1)
- -> Seq Scan on t3
+ Hash Cond: (t1.c1 = t3.c1)
+ -> Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Index Scan using t1_i1 on t1
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
-> Hash
+ -> Hash Join
+ Hash Cond: (t3.c1 = t4.c1)
+ -> Seq Scan on t3
+ -> Hash
+ -> Seq Scan on t4
+(14 rows)
+
+-- No. L-3-6-5
+/*+Leading((((t1 t3) t4) 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 ")"
+DETAIL: Unrecognized hint keyword ")".
+LOG: pg_hint_plan:
+used hint:
+Leading((((t1 t3) t4) t2))
+not used hint:
+duplication hint:
+error hint:
+
+ QUERY PLAN
+------------------------------------------------
+ Merge Join
+ Merge Cond: (t1.c1 = t2.c1)
+ -> Merge Join
+ Merge Cond: (t1.c1 = t4.c1)
-> Merge Join
- Merge Cond: (t1.c1 = t2.c1)
+ Merge Cond: (t1.c1 = t3.c1)
-> Index Scan using t1_i1 on t1
- -> Sort
- Sort Key: t2.c1
- -> Seq Scan on t2
-(10 rows)
+ -> Index Scan using t3_i1 on t3
+ -> Index Scan using t4_i1 on t4
+ -> Sort
+ Sort Key: t2.c1
+ -> Seq Scan on t2
+(12 rows)
+
+-- No. L-3-6-6
+/*+Leading((t1 (t3 (t4 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;
+LOG: pg_hint_plan:
+used hint:
+Leading((t1 (t3 (t4 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
+ -> Hash Join
+ Hash Cond: (t3.c1 = t2.c1)
+ -> Seq Scan on t3
+ -> Hash
+ -> Hash Join
+ Hash Cond: (t4.c1 = t2.c1)
+ -> Seq Scan on t4
+ -> Hash
+ -> Seq Scan on t2
+(14 rows)
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