CREATE TABLE t1 (a INT, b INT, c INT, d INT);
CREATE TABLE t2 (e INT, f INT, g INT);
CREATE TABLE t3 (x INT, y INT);
INSERT INTO t1 VALUES
(1,1,18,1), (2,1,25,1), (1,3,40,1), (2,3,40,4),
(4,2,24,4), (3,2,23,1), (1,2,40,2), (3,4,17,2),
(5,5,65,1), (2,3,70,3), (1,4,35,3), (2,3,25,3),
(2,2,40,4), (1,4,55,1), (5,3,72,4), (1,2,70,5);
INSERT INTO t2 VALUES
(1,2,38), (2,3,15), (1,3,40), (1,4,35),
(2,2,70), (3,4,23), (5,5,12), (5,4,17),
(3,3,17), (4,2,24), (2,5,25), (5,1,65);
INSERT INTO t3 VALUES
(1,25), (1,18), (2,15), (4,24),
(1,35), (3,23), (3,17), (2,15);
CREATE VIEW v1 AS
(
SELECT t3.x AS v1_x, t3.y AS v1_y FROM t3 WHERE t3.x<=3
);
CREATE VIEW v2 AS
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.e
HAVING max_g>25
);
# conjunctive subformula : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.c<25AND
(t1.a,t1.c) IN (SELECT t2.e,MAX(t2.g) FROM t2 WHERE t2.e<5 GROUP BY t2.e);
a b c d 42244 32231
SELECT * FROM t1
WHERE t1.c<25AND
(t1.a,t1.c) IN (SELECT t2.e,MAX(t2.g) FROM t2 WHERE t2.e<5 GROUP BY t2.e);
a b c d 42244 32231
EXPLAIN SELECT * FROM t1
WHERE t1.c<25AND
(t1.a,t1.c) IN (SELECT t2.e,MAX(t2.g) FROM t2 WHERE t2.e<5 GROUP BY t2.e);
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.c<25AND
(t1.a,t1.c) IN (SELECT t2.e,MAX(t2.g) FROM t2 WHERE t2.e<5 GROUP BY t2.e);
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c < 25 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` < 25", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# extracted AND formula : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.c>55AND t1.b<4AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
SELECT * FROM t1
WHERE t1.c>55AND t1.b<4AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
EXPLAIN SELECT * FROM t1
WHERE t1.c>55AND t1.b<4AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.c>55AND t1.b<4AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c > 55 and t1.b < 4 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` > 55 and t2.f < 4", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# extracted OR formula : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.c>60OR t1.c<25) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 23703
SELECT * FROM t1
WHERE (t1.c>60OR t1.c<25) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 23703
EXPLAIN SELECT * FROM t1
WHERE (t1.c>60OR t1.c<25) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.c>60OR t1.c<25) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.c > 60 or t1.c < 25) and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` > 60 or `MAX(t2.g)` < 25", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# extracted AND-OR formula : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE ((t1.c>60OR t1.c<25) AND t1.b>2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
SELECT * FROM t1
WHERE ((t1.c>60OR t1.c<25) AND t1.b>2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
EXPLAIN SELECT * FROM t1
WHERE ((t1.c>60OR t1.c<25) AND t1.b>2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE ((t1.c>60OR t1.c<25) AND t1.b>2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.c > 60 or t1.c < 25) and t1.b > 2 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "(`MAX(t2.g)` > 60 or `MAX(t2.g)` < 25) and t2.f > 2", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE ((t1.a<2OR t1.d>3) AND t1.b>1) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 12402
SELECT * FROM t1
WHERE ((t1.a<2OR t1.d>3) AND t1.b>1) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 12402
EXPLAIN SELECT * FROM t1
WHERE ((t1.a<2OR t1.d>3) AND t1.b>1) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE ((t1.a<2OR t1.d>3) AND t1.b>1) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.a < 2 or t1.d > 3) and t1.b > 1 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "t2.f > 1", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# using view IN subquery defINition : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.c>20AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
a b c d 32231
SELECT * FROM t1
WHERE t1.c>20AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
a b c d 32231
EXPLAIN SELECT * FROM t1
WHERE t1.c>20AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t3 ALL NULL NULL NULL NULL 8 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.c>20AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c > 20 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["v1_x", "MAX(v1_y)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(v1_y)` > 20", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t3", "access_type": "ALL", "loops": 1, "rows": 8, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t3.x > 1 and t3.x <= 3"
}
}
]
}
}
}
}
}
}
]
}
}
# using equality : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1,v1
WHERE t1.c>20AND t1.c=v1_y AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d v1_x v1_y 32231323
SELECT * FROM t1,v1
WHERE t1.c>20AND t1.c=v1_y AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d v1_x v1_y 32231323
EXPLAIN SELECT * FROM t1,v1
WHERE t1.c>20AND t1.c=v1_y AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where; Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t3.y 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1,v1
WHERE t1.c>20AND t1.c=v1_y AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t3", "access_type": "ALL", "loops": 1, "rows": 8, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t3.y > 20 and t3.x <= 3 and t3.y is not null"
}
},
{ "block-nl-join": { "table": { "table_name": "t1", "access_type": "ALL", "loops": 8, "rows": 16, "cost": "COST_REPLACED", "filtered": 100
}, "buffer_type": "flat", "buffer_size": "119", "join_type": "BNL", "attached_condition": "t1.c = t3.y and t1.a is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t3.y"], "loops": 128, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` > 20", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a<2AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 12402
SELECT * FROM t1
WHERE t1.a<2AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 12402
EXPLAIN SELECT * FROM t1
WHERE t1.a<2AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a<2AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a < 2 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e < 2"
}
}
]
}
}
}
}
}
}
]
}
}
# extracted AND formula : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a>2AND t1.a<5AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 32231
SELECT * FROM t1
WHERE t1.a>2AND t1.a<5AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 32231
EXPLAIN SELECT * FROM t1
WHERE t1.a>2AND t1.a<5AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a>2AND t1.a<5AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 2 and t1.a < 5 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e > 2 and t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# extracted OR formula : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.a<2OR t1.a>=4) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 42244 12402
SELECT * FROM t1
WHERE (t1.a<2OR t1.a>=4) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 42244 12402
EXPLAIN SELECT * FROM t1
WHERE (t1.a<2OR t1.a>=4) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a<2OR t1.a>=4) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.a < 2 or t1.a >= 4) and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and (t2.e < 2 or t2.e >= 4)"
}
}
]
}
}
}
}
}
}
]
}
}
# extracted AND-OR formula : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 14353
SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 14353
EXPLAIN SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.a < 2 or t1.a = 5) and t1.b > 3 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and (t2.e < 2 or t2.e = 5) and t2.f > 3"
}
}
]
}
}
}
}
}
}
]
}
}
# extracted AND-OR formula : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 14353
SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 14353
EXPLAIN SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE ((t1.a<2OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.a < 2 or t1.a = 5) and t1.b > 3 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and (t2.e < 2 or t2.e = 5) and t2.f > 3"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE ((t1.b<3OR t1.d>2) AND t1.a<2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 12402
SELECT * FROM t1
WHERE ((t1.b<3OR t1.d>2) AND t1.a<2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 12402
EXPLAIN SELECT * FROM t1
WHERE ((t1.b<3OR t1.d>2) AND t1.a<2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE ((t1.b<3OR t1.d>2) AND t1.a<2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.b < 3 or t1.d > 2) and t1.a < 2 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e < 2"
}
}
]
}
}
}
}
}
}
]
}
}
# using equalities : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.d=1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401
SELECT * FROM t1
WHERE t1.d=1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401
EXPLAIN SELECT * FROM t1
WHERE t1.d=1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 const,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.d=1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a = 1 and t1.d = 1 and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["const", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e = 1"
}
}
]
}
}
}
}
}
]
}
}
# using equality : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.d>1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244
SELECT * FROM t1
WHERE t1.d>1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244
EXPLAIN SELECT * FROM t1
WHERE t1.d>1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.d>1AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.d = t1.a and t1.a > 1 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e > 1"
}
}
]
}
}
}
}
}
}
]
}
}
# using view IN subquery definition : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a<3AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
a b c d
SELECT * FROM t1
WHERE t1.a<3AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
a b c d
EXPLAIN SELECT * FROM t1
WHERE t1.a<3AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t3 ALL NULL NULL NULL NULL 8 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a<3AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a < 3 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["v1_x", "MAX(v1_y)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t3", "access_type": "ALL", "loops": 1, "rows": 8, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t3.x > 1 and t3.x <= 3 and t3.x < 3"
}
}
]
}
}
}
}
}
}
]
}
}
# using equality : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1,v1
WHERE t1.a=v1_x AND v1_x<2AND v1_y>30AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d v1_x v1_y 13401135 12402135
SELECT * FROM t1,v1
WHERE t1.a=v1_x AND v1_x<2AND v1_y>30AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d v1_x v1_y 13401135 12402135
EXPLAIN SELECT * FROM t1,v1
WHERE t1.a=v1_x AND v1_x<2AND v1_y>30AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where; Using join buffer (flat, BNL join) 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t3.x,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1,v1
WHERE t1.a=v1_x AND v1_x<2AND v1_y>30AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t3", "access_type": "ALL", "loops": 1, "rows": 8, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t3.x < 2 and t3.y > 30 and t3.x <= 3 and t3.x is not null"
}
},
{ "block-nl-join": { "table": { "table_name": "t1", "access_type": "ALL", "loops": 8, "rows": 16, "cost": "COST_REPLACED", "filtered": 100
}, "buffer_type": "flat", "buffer_size": "119", "join_type": "BNL", "attached_condition": "t1.a = t3.x and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t3.x", "test.t1.c"], "loops": 128, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e <= 3"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE
# extracted OR formula : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE ((t1.b<3OR t1.b=4) AND t1.a<3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 12402
SELECT * FROM t1
WHERE ((t1.b<3OR t1.b=4) AND t1.a<3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 12402
EXPLAIN SELECT * FROM t1
WHERE ((t1.b<3OR t1.b=4) AND t1.a<3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE ((t1.b<3OR t1.b=4) AND t1.a<3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "(t1.b < 3 or t1.b = 4) and t1.a < 3 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "t2.f < 3 or t2.f = 4", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e < 3"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using addition : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.a+t1.c>41) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
SELECT * FROM t1
WHERE (t1.a+t1.c>41) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
EXPLAIN SELECT * FROM t1
WHERE (t1.a+t1.c>41) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a+t1.c>41) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a + t1.c > 41 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "t2.e + `MAX(t2.g)` > 41", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using substitution : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.c-t1.a<35) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 32231
SELECT * FROM t1
WHERE (t1.c-t1.a<35) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 42244 32231
EXPLAIN SELECT * FROM t1
WHERE (t1.c-t1.a<35) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.c-t1.a<35) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c - t1.a < 35 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` - t2.e < 35", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using multiplication : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.c*t1.a>100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
SELECT * FROM t1
WHERE (t1.c*t1.a>100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
EXPLAIN SELECT * FROM t1
WHERE (t1.c*t1.a>100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.c*t1.a>100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c * t1.a > 100 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` * t2.e > 100", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using division : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.c/t1.a>30) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 12402 23703
SELECT * FROM t1
WHERE (t1.c/t1.a>30) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 12402 23703
EXPLAIN SELECT * FROM t1
WHERE (t1.c/t1.a>30) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.c/t1.a>30) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c / t1.a > 30 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` / t2.e > 30", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using BETWEEN : pushing into HAVING SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.c BETWEEN 50AND100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
SELECT * FROM t1
WHERE (t1.c BETWEEN 50AND100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 23703
EXPLAIN SELECT * FROM t1
WHERE (t1.c BETWEEN 50AND100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.c BETWEEN 50AND100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c between 50 and 100 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "`MAX(t2.g)` between 50 and 100", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using addition : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.a+t1.b > 5) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 42244
SELECT * FROM t1
WHERE (t1.a+t1.b > 5) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 42244
EXPLAIN SELECT * FROM t1
WHERE (t1.a+t1.b > 5) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a+t1.b > 5) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a + t1.b > 5 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e + t2.f > 5"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using substitution : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.a-t1.b > 0) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 42244
SELECT * FROM t1
WHERE (t1.a-t1.b > 0) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 42244
EXPLAIN SELECT * FROM t1
WHERE (t1.a-t1.b > 0) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a-t1.b > 0) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a - t1.b > 0 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e - t2.f > 0"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using multiplication : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.a*t1.b > 6) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 42244
SELECT * FROM t1
WHERE (t1.a*t1.b > 6) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 42244
EXPLAIN SELECT * FROM t1
WHERE (t1.a*t1.b > 6) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a*t1.b > 6) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a * t1.b > 6 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e * t2.f > 6"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using division : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.b/t1.a > 2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 13401 14353
SELECT * FROM t1
WHERE (t1.b/t1.a > 2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
a b c d 13401 14353
EXPLAIN SELECT * FROM t1
WHERE (t1.b/t1.a > 2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.b/t1.a > 2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.b / t1.a > 2 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.f / t2.e > 2"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula using BETWEEN : pushing into WHERE SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.a BETWEEN 1AND3) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 32231 12402 23703
SELECT * FROM t1
WHERE (t1.a BETWEEN 1AND3) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
a b c d 13401 32231 12402 23703
EXPLAIN SELECT * FROM t1
WHERE (t1.a BETWEEN 1AND3) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a BETWEEN 1AND3) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a between 1 and 3 and t1.a is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["e", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e between 1 and 3"
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into HAVING of the IN subquery
# conjunctive subformula : pushing into WHERE of the view from the IN subquery SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.c>3AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
a b c d 12402 23703
SELECT * FROM t1
WHERE t1.c>3AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
a b c d 12402 23703
EXPLAIN SELECT * FROM t1
WHERE t1.c>3AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using temporary 3 DERIVED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.c>3AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c > 3 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "MAX(v2.f)", "max_g"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "v2.max_g > 3", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "<derived3>", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "v2.e < 5", "materialized": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "max_g > 25", "filesort": { "sort_key": "t2.e", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE of the IN subquery
# conjunctive subformula : pushing into WHERE of the view
# from the IN subquery SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
a b c d 23703
SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
a b c d 23703
EXPLAIN SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using temporary 3 DERIVED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 1 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "MAX(v2.f)", "max_g"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "<derived3>", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "v2.e < 5 and v2.e > 1", "materialized": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "max_g > 25", "filesort": { "sort_key": "t2.e", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e > 1"
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE and HAVING
# of the IN subquery
# conjunctive subformula : pushing into WHERE of the view
# from the IN subquery SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a>1AND t1.c<100AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
a b c d 23703
SELECT * FROM t1
WHERE t1.a>1AND t1.c<100AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
a b c d 23703
EXPLAIN SELECT * FROM t1
WHERE t1.a>1AND t1.c<100AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using temporary 3 DERIVED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a>1AND t1.c<100AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 1 and t1.c < 100 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "MAX(v2.f)", "max_g"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "v2.max_g < 100", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "<derived3>", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "v2.e < 5 and v2.e > 1", "materialized": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "max_g > 25", "filesort": { "sort_key": "t2.e", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.e > 1"
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE of the IN subquery
# extracted AND formula : pushing into HAVING of the derived table
# from the IN subquery SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
a b c d 23404
SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
a b c d 23404
EXPLAIN SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using temporary 3 DERIVED t2 ALL NULL NULL NULL NULL 12 Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 1 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "MAX(d_tab.f)", "max_g"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "<derived3>", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "d_tab.e < 5 and d_tab.e > 1", "materialized": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "max_g > 25 and t2.e < 5 and t2.e > 1", "filesort": { "sort_key": "t2.f", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into HAVING of the derived table
# conjunctive subformula : pushing into WHERE of the IN subquery from
# the derived table
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.b>2;
x y a b max_c 2152370 2152370 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
a b c d 23404
SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
a b c d 23404
EXPLAIN SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using temporary 3 DERIVED t2 ALL NULL NULL NULL NULL 12 Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 1 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "MAX(d_tab.f)", "max_g"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "<derived3>", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "d_tab.e < 5 and d_tab.e > 1", "materialized": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "max_g > 25 and t2.e < 5 and t2.e > 1", "filesort": { "sort_key": "t2.f", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE of the derived table
# extracted AND formula : pushing into WHERE of the IN subquery from
# the derived table
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5;
x y a b max_c 2152370 4244224 2152370 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
a b c d 23404
SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
a b c d 23404
EXPLAIN SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using temporary 3 DERIVED t2 ALL NULL NULL NULL NULL 12 Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 1 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "MAX(d_tab.f)", "max_g"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "<derived3>", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "d_tab.e < 5 and d_tab.e > 1", "materialized": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "max_g > 25 and t2.e < 5 and t2.e > 1", "filesort": { "sort_key": "t2.f", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE and HAVING
# of the derived table
# extracted AND formula : pushing into WHERE of the IN subquery
# from the derived table SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
x y a b max_c 4244224
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
x y a b max_c 4244224
EXPLAIN SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t3.x 1 Using where 2 DERIVED t1 ALL NULL NULL NULL NULL 16 Using where; Using temporary; Using filesort 2 DERIVED <subquery3> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 3 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t3", "access_type": "ALL", "loops": 1, "rows": 8, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t3.x < 5 and t3.x is not null"
}
},
{ "table": { "table_name": "<derived2>", "access_type": "ref", "possible_keys": ["key0"], "key": "key0", "key_length": "5", "used_key_parts": ["a"], "ref": ["test.t3.x"], "loops": 8, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "d_tab.max_c < 70", "materialized": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "max_c < 70", "filesort": { "sort_key": "t1.a", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 1 and t1.a < 5 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery3>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "t2.f < 5", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e > 1 and t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE of the derived table
# conjunctive subformula : pushing into HAVING of the IN subquery from
# the derived table
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE (t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.f<4
GROUP BY t2.f
)
GROUP BY t1.a
HAVING t1.b<5
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5;
x y a b max_c 1251270 1181270 2152340 1351270 2152340 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
x y a b max_c 4244224
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
x y a b max_c 4244224
EXPLAIN SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t3.x 1 Using where 2 DERIVED t1 ALL NULL NULL NULL NULL 16 Using where; Using temporary; Using filesort 2 DERIVED <subquery3> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1 3 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5AND d_tab.max_c<70;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t3", "access_type": "ALL", "loops": 1, "rows": 8, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t3.x < 5 and t3.x is not null"
}
},
{ "table": { "table_name": "<derived2>", "access_type": "ref", "possible_keys": ["key0"], "key": "key0", "key_length": "5", "used_key_parts": ["a"], "ref": ["test.t3.x"], "loops": 8, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "d_tab.max_c < 70", "materialized": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "having_condition": "max_c < 70", "filesort": { "sort_key": "t1.a", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.a > 1 and t1.a < 5 and t1.a is not null and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery3>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": ["e", "f", "MAX(t2.g)"], "ref": ["test.t1.a", "test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 3, "cost": "COST_REPLACED", "having_condition": "t2.f < 5", "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e > 1 and t2.e < 5"
}
}
]
}
}
}
}
}
}
]
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE
# using WINDOW FUNCTIONS : using MAX function SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, MAX(t2.g) OVER (PARTITION BY t2.f)
FROM t2
WHERE t2.e<5
) ;
a b c d 13401 23404 14353 12705
SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, MAX(t2.g) OVER (PARTITION BY t2.f)
FROM t2
WHERE t2.e<5
) ;
a b c d 13401 23404 14353 12705
EXPLAIN SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, MAX(t2.g) OVER (PARTITION BY t2.f)
FROM t2
WHERE t2.e<5
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.b,test.t1.c 1 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, MAX(t2.g) OVER (PARTITION BY t2.f)
FROM t2
WHERE t2.e<5
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.b > 1 and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "8", "used_key_parts": ["f", "MAX(t2.g) OVER (PARTITION BY t2.f)"], "ref": ["test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "window_functions_computation": { "sorts": [
{ "filesort": { "sort_key": "t2.f"
}
}
], "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.f > 1"
}
}
]
}
}
}
}
}
}
}
]
}
}
# conjunctive subformula : pushing into WHERE
# using WINDOW FUNCTIONS : using SUM function SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)
FROM t2
WHERE t2.e<5
) ;
a b c d 53724
SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)
FROM t2
WHERE t2.e<5
) ;
a b c d 53724
EXPLAIN SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)
FROM t2
WHERE t2.e<5
) ;
id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 16 Using where 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 12 test.t1.b,test.t1.c 1 Using where 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)
FROM t2
WHERE t2.e<5
) ;
EXPLAIN
{ "query_block": { "select_id": 1, "cost": "COST_REPLACED", "nested_loop": [
{ "table": { "table_name": "t1", "access_type": "ALL", "loops": 1, "rows": 16, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.b > 1 and t1.b is not null and t1.c is not null"
}
},
{ "table": { "table_name": "<subquery2>", "access_type": "eq_ref", "possible_keys": ["distinct_key"], "key": "distinct_key", "key_length": "12", "used_key_parts": [ "f", "CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)"
], "ref": ["test.t1.b", "test.t1.c"], "loops": 16, "rows": 1, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t1.c = `<subquery2>`.`CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)`", "materialized": { "unique": 1, "materialization": { "query_block": { "select_id": 2, "cost": "COST_REPLACED", "window_functions_computation": { "sorts": [
{ "filesort": { "sort_key": "t2.f"
}
}
], "temporary_table": { "nested_loop": [
{ "table": { "table_name": "t2", "access_type": "ALL", "loops": 1, "rows": 12, "cost": "COST_REPLACED", "filtered": 100, "attached_condition": "t2.e < 5 and t2.f > 1"
}
}
]
}
}
}
}
}
}
}
]
}
}
DROP TABLE t1,t2,t3;
DROP VIEW v1,v2;
#
# MDEV-16721: IN-subquery defined with the AUTO-INCREMENT column
# and used with the ZEROFILL column
#
CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY);
CREATE TABLE t2 (b INT ZEROFILL);
INSERT INTO t2 VALUES (2), (3);
SELECT *
FROM t2
WHERE t2.b IN (SELECT MIN(t1.a) from t1);
b
DROP TABLE t1, t2;
#
# MDEV-16730: server fault caused by pushdown into the derived table
# condition that joins IN subquery and parent select
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1), (2), (3);
SELECT *
FROM (SELECT DISTINCT * FROM t1) AS tbl
WHERE tbl.a IN
(
SELECT COUNT(t1.a)
FROM t1
WHERE (t1.a!=1)
);
a 2
DROP TABLE t1;
#
# MDEV-16727: failure assertion caused by the lamely saved list
# of multiple equalities
#
CREATE TABLE t1 (a varchar(1));
INSERT INTO t1 VALUES ('x'), ('y'), ('z');
CREATE TABLE t2 (b varchar(1));
INSERT INTO t2 VALUES ('x');
CREATE TABLE t3 (c varchar(1));
INSERT INTO t3 VALUES ('y');
CREATE TABLE t4 (d varchar(1));
INSERT INTO t4 VALUES ('x'), ('z');
SELECT * FROM t1
JOIN t2 ON (t1.a=t2.b)
LEFT JOIN t3 ON (t1.a=t3.c)
WHERE (t1.a) IN
(
SELECT t4.d
FROM t4
ORDER BY t4.d
);
a b c
x x NULL
DROP TABLE t1,t2,t3,t4;
#
# MDEV-17360: IN subquery predicate with outer reference in the left part
# that refers to a field of a mergeable derived table
#
CREATE TABLE t1 (id1 int) ENGINE=MYISAM;
INSERT INTO t1 VALUES (1814),(0),(NULL),(1);
CREATE TABLE t2 (id2 int) ENGINE=MYISAM;
SELECT 1 AS r FROM t2,t1,(SELECT * FROM t1) dt1
WHERE NOT EXISTS (SELECT id2 FROM t2
WHERE dt1.id1 IN (SELECT t2.id2 FROM t2
HAVING t2.id2 >= 1));
r
DROP TABLE t1,t2;
#
# MDEV-17027: IN subquery predicate with outer reference in the left part
# conjuncted with equality predicate
#
CREATE TABLE t1 (pk int, i1 int, v1 varchar(1));
INSERT INTO t1 VALUES (3,2,'x'), (1,1,'y'), (4,2,'z');
CREATE TABLE t2 (pk int, i1 int, v1 varchar(1));
INSERT INTO t2 VALUES (5,2,'x'), (7,1,'x');
CREATE TABLE t3 (pk int, i1 int, v1 varchar(1));
INSERT INTO t3 VALUES (8,2,'x'), (7,1,'z');
SELECT t3.i1 FROM t3
WHERE EXISTS ( SELECT t2.v1 FROM t1,t2
WHERE t1.v1 = t2.v1 AND
t3.i1 IN (SELECT t.i1 FROM t1 as t
GROUP BY i1 HAVING t.i1 < 3));
i1 2 1
DROP TABLE t1,t2,t3;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.100 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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