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mariadb/mysql-test/main/having_cond_pushdown.result
Galina Shalygina a765b19e5c MDEV-19245: Impossible WHERE should be noticed earlier after HAVING pushdown 
The bug appears because not all conditions are found to be knowingly
true or false in WHERE after HAVING pushdown optimization.
Impossible WHERE can be found much earlier compared with how it is done now.

To fix it and_new_conditions_to_optimized_cond() is changed.
2019-04-22 16:19:55 +03:00

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CREATE TABLE t1(a INT, b INT, c INT);
CREATE TABLE t2(x INT, y INT);
INSERT INTO t1 VALUES (1,14,3), (2,13,2), (1,22,1), (3,13,4), (3,14,2);
INSERT INTO t2 VALUES (2,13),(5,22),(3,14),(1,22);
CREATE VIEW v1
AS SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a;
CREATE FUNCTION f1() RETURNS INT RETURN 3;
# conjunctive subformula
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>2);
a MAX(t1.b)
3 14
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>2);
a MAX(t1.b)
3 14
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a>2)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 2"
}
}
}
}
}
# conjunctive subformula : using equality
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2);
a MAX(t1.b)
2 13
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2);
a MAX(t1.b)
2 13
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a=2)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2"
}
}
}
# extracted AND formula
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.a<4);
a MAX(t1.b)
2 13
3 14
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.a<4);
a MAX(t1.b)
2 13
3 14
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.a<4);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.a<4);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.a < 4"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a>1) AND (t1.a<4)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.a < 4"
}
}
}
}
}
# extracted OR formula
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) OR (a IN (SELECT 3));
a MAX(t1.b)
2 13
3 14
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) OR (a IN (SELECT 3));
a MAX(t1.b)
2 13
3 14
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) OR (a IN (SELECT 3));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
Warnings:
Note 1249 Select 2 was reduced during optimization
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) OR (a IN (SELECT 3));
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 or t1.a = 3"
}
}
}
}
}
Warnings:
Note 1249 Select 2 was reduced during optimization
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a>1) OR (a IN (SELECT 3))
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 or t1.a = 3"
}
}
}
}
}
Warnings:
Note 1249 Select 3 was reduced during optimization
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING ((t1.a>2) AND (MAX(t1.b)>13)) OR ((t1.a<3) AND (MIN(t1.c)>1));
a MAX(t1.b) MIN(t1.c)
2 13 2
3 14 2
SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING ((t1.a>2) AND (MAX(t1.b)>13)) OR ((t1.a<3) AND (MIN(t1.c)>1));
a MAX(t1.b) MIN(t1.c)
2 13 2
3 14 2
explain SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING ((t1.a>2) AND (MAX(t1.b)>13)) OR ((t1.a<3) AND (MIN(t1.c)>1));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING ((t1.a>2) AND (MAX(t1.b)>13)) OR ((t1.a<3) AND (MIN(t1.c)>1));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a > 2 and max(t1.b) > 13 or t1.a < 3 and min(t1.c) > 1",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 2 or t1.a < 3"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a>2) OR (t1.a<3)
GROUP BY t1.a
HAVING ((t1.a>2) AND (MAX(t1.b)>13)) OR ((t1.a<3) AND (MIN(t1.c)>1));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a > 2 and max(t1.b) > 13 or t1.a < 3 and min(t1.c) > 1",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 2 or t1.a < 3"
}
}
}
}
}
# conjunctive subformula : no aggregation formula pushdown
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.a)<3);
a MAX(t1.b)
2 13
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.a)<3);
a MAX(t1.b)
2 13
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.a)<3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.a)<3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.a) < 3",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a>1)
GROUP BY t1.a
HAVING (MAX(t1.a)<3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.a) < 3",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)>13);
a MAX(t1.b)
3 14
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)>13);
a MAX(t1.b)
3 14
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)>13);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)>13);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) > 13",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a>1)
GROUP BY t1.a
HAVING (MAX(t1.b)>13);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) > 13",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=3) AND (MAX(t1.a)=3);
a MAX(t1.b)
3 14
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=3) AND (MAX(t1.a)=3);
a MAX(t1.b)
3 14
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=3) AND (MAX(t1.a)=3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=3) AND (MAX(t1.a)=3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.a) = 3",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a=3)
GROUP BY t1.a
HAVING (MAX(t1.a)=3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.a) = 3",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)>12);
a MAX(t1.b)
2 13
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)>12);
a MAX(t1.b)
2 13
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)>12);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)>12);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) > 12",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a=2)
GROUP BY t1.a
HAVING (MAX(t1.b)>12);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) > 12",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)=13);
a MAX(t1.b)
2 13
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)=13);
a MAX(t1.b)
2 13
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)=13);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MAX(t1.b)=13);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) = 13",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a>1)
GROUP BY t1.a
HAVING (MAX(t1.b)=13);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) = 13",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MIN(t1.c)<3);
a MIN(t1.c)
2 2
3 2
SELECT t1.a,MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MIN(t1.c)<3);
a MIN(t1.c)
2 2
3 2
explain SELECT t1.a,MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MIN(t1.c)<3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (MIN(t1.c)<3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "min(t1.c) < 3",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MIN(t1.c)
FROM t1
WHERE (t1.a>1)
GROUP BY t1.a
HAVING (MIN(t1.c)<3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "min(t1.c) < 3",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)=13) AND (MIN(t1.c)=2);
a MAX(t1.b) MIN(t1.c)
2 13 2
SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)=13) AND (MIN(t1.c)=2);
a MAX(t1.b) MIN(t1.c)
2 13 2
explain SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)=13) AND (MIN(t1.c)=2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),MIN(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a=2) AND (MAX(t1.b)=13) AND (MIN(t1.c)=2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) = 13 and min(t1.c) = 2",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MIN(t1.c)
FROM t1
WHERE (t1.a=2)
GROUP BY t1.a
HAVING (MAX(t1.b)=13) AND (MIN(t1.c)=2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) = 13 and min(t1.c) = 2",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2"
}
}
}
# conjunctive subformula : no stored function pushdown
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (a=test.f1());
a MAX(t1.b)
3 14
SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (a=test.f1());
a MAX(t1.b)
3 14
explain SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (a=test.f1());
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
GROUP BY t1.a
HAVING (t1.a>1) AND (a=test.f1());
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a = test.f1()",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a>1)
GROUP BY t1.a
HAVING (a=test.f1());
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a = test.f1()",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
# conjunctive subformula : pushdown into derived table WHERE clause
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT v1.a
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.a
HAVING (v1.a>1);
a
2
3
SELECT v1.a
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.a
HAVING (v1.a>1);
a
2
3
explain SELECT v1.a
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.a
HAVING (v1.a>1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where; Using temporary; Using filesort
1 PRIMARY <derived2> ref key0 key0 5 test.t2.x 2
2 DERIVED t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT v1.a
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.a
HAVING (v1.a>1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "v1.a",
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.x > 1 and t2.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.t2.x"],
"rows": 2,
"filtered": 100,
"materialized": {
"query_block": {
"select_id": 2,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT v1.a
FROM t2,v1
WHERE (t2.x=v1.a) AND (v1.a>1)
GROUP BY v1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "v1.a",
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.x > 1 and t2.x is not null"
},
"table": {
"table_name": "<derived3>",
"access_type": "ref",
"possible_keys": ["key0"],
"key": "key0",
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t2.x"],
"rows": 2,
"filtered": 100,
"materialized": {
"query_block": {
"select_id": 3,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
}
}
}
}
}
# conjunctive subformula : pushdown into derived table HAVING clause
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT v1.a,v1.c
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.c
HAVING (v1.c>2);
a c
1 3
3 4
SELECT v1.a,v1.c
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.c
HAVING (v1.c>2);
a c
1 3
3 4
explain SELECT v1.a,v1.c
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.c
HAVING (v1.c>2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where; Using temporary; Using filesort
1 PRIMARY <derived2> ref key0 key0 5 test.t2.x 2 Using where
2 DERIVED t1 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
explain format=json SELECT v1.a,v1.c
FROM t2,v1
WHERE (t2.x=v1.a)
GROUP BY v1.c
HAVING (v1.c>2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "v1.c",
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.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.t2.x"],
"rows": 2,
"filtered": 100,
"attached_condition": "v1.c > 2",
"materialized": {
"query_block": {
"select_id": 2,
"having_condition": "t1.c > 2",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100
}
}
}
}
}
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT v1.a,v1.c
FROM t2,v1
WHERE (t2.x=v1.a) AND (v1.c>2)
GROUP BY v1.c;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "v1.c",
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.x is not null"
},
"table": {
"table_name": "<derived3>",
"access_type": "ref",
"possible_keys": ["key0"],
"key": "key0",
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t2.x"],
"rows": 2,
"filtered": 100,
"attached_condition": "v1.c > 2",
"materialized": {
"query_block": {
"select_id": 3,
"having_condition": "t1.c > 2",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100
}
}
}
}
}
}
}
}
}
}
# conjunctive subformula : pushdown into materialized IN subquery
# WHERE clause
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.a
HAVING (t1.a>1);
a b c
2 13 2
3 14 2
SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.a
HAVING (t1.a>1);
a b c
2 13 2
3 14 2
explain SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.a
HAVING (t1.a>1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.b 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where; Using temporary
explain format=json SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.a
HAVING (t1.a>1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.a is not null and t1.b is not null"
},
"table": {
"table_name": "<subquery2>",
"access_type": "eq_ref",
"possible_keys": ["distinct_key"],
"key": "distinct_key",
"key_length": "8",
"used_key_parts": ["x", "MAX(t2.y)"],
"ref": ["test.t1.a", "test.t1.b"],
"rows": 1,
"filtered": 100,
"materialized": {
"unique": 1,
"query_block": {
"select_id": 2,
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.x < 5 and t2.x > 1"
}
}
}
}
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT * FROM t1
WHERE
(t1.a>1) AND
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.a is not null and t1.b is not null"
},
"table": {
"table_name": "<subquery3>",
"access_type": "eq_ref",
"possible_keys": ["distinct_key"],
"key": "distinct_key",
"key_length": "8",
"used_key_parts": ["x", "MAX(t2.y)"],
"ref": ["test.t1.a", "test.t1.b"],
"rows": 1,
"filtered": 100,
"materialized": {
"unique": 1,
"query_block": {
"select_id": 3,
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.x < 5 and t2.x > 1"
}
}
}
}
}
}
}
}
}
# conjunctive subformula : pushdown into materialized IN subquery
# HAVING clause
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.b
HAVING (t1.b<14);
a b c
2 13 2
SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.b
HAVING (t1.b<14);
a b c
2 13 2
explain SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.b
HAVING (t1.b<14);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.b 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where; Using temporary
explain format=json SELECT * FROM t1
WHERE
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.b
HAVING (t1.b<14);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b < 14 and t1.a is not null and t1.b is not null"
},
"table": {
"table_name": "<subquery2>",
"access_type": "eq_ref",
"possible_keys": ["distinct_key"],
"key": "distinct_key",
"key_length": "8",
"used_key_parts": ["x", "MAX(t2.y)"],
"ref": ["test.t1.a", "test.t1.b"],
"rows": 1,
"filtered": 100,
"materialized": {
"unique": 1,
"query_block": {
"select_id": 2,
"having_condition": "`MAX(t2.y)` < 14",
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.x < 5"
}
}
}
}
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT * FROM t1
WHERE
(t1.b<14) AND
(t1.a,t1.b) IN (SELECT t2.x,MAX(t2.y) FROM t2 WHERE t2.x<5 GROUP BY t2.x)
GROUP BY t1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b < 14 and t1.a is not null and t1.b is not null"
},
"table": {
"table_name": "<subquery3>",
"access_type": "eq_ref",
"possible_keys": ["distinct_key"],
"key": "distinct_key",
"key_length": "8",
"used_key_parts": ["x", "MAX(t2.y)"],
"ref": ["test.t1.a", "test.t1.b"],
"rows": 1,
"filtered": 100,
"materialized": {
"unique": 1,
"query_block": {
"select_id": 3,
"having_condition": "`MAX(t2.y)` < 14",
"temporary_table": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t2.x < 5"
}
}
}
}
}
}
}
}
}
# non-standard allowed queries
# conjunctive subformula
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.c=2) AND (t1.a>1);
a MAX(t1.b) c
2 13 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.c=2) AND (t1.a>1);
a MAX(t1.b) c
2 13 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.c=2) AND (t1.a>1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.c=2) AND (t1.a>1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c = 2",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c FROM t1
WHERE (t1.a>1)
GROUP BY t1.a
HAVING (t1.c=2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c = 2",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT MAX(t1.a),t1.a,t1.b,t1.c
FROM t1
GROUP BY t1.b
HAVING (t1.a=2) AND (t1.b=13) AND (t1.c=2);
MAX(t1.a) a b c
3 2 13 2
SELECT MAX(t1.a),t1.a,t1.b,t1.c
FROM t1
GROUP BY t1.b
HAVING (t1.a=2) AND (t1.b=13) AND (t1.c=2);
MAX(t1.a) a b c
3 2 13 2
explain SELECT MAX(t1.a),t1.a,t1.b,t1.c
FROM t1
GROUP BY t1.b
HAVING (t1.a=2) AND (t1.b=13) AND (t1.c=2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT MAX(t1.a),t1.a,t1.b,t1.c
FROM t1
GROUP BY t1.b
HAVING (t1.a=2) AND (t1.b=13) AND (t1.c=2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a = 2 and t1.c = 2",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 13"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT MAX(t1.a),t1.a,t1.b,t1.c
FROM t1
WHERE (t1.b=13)
GROUP BY t1.b
HAVING (t1.a=2) AND (t1.c=2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a = 2 and t1.c = 2",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 13"
}
}
}
# extracted AND formula : using equalities
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c>1);
a MAX(t1.b) c
2 13 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c>1);
a MAX(t1.b) c
2 13 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c>1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c>1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b) FROM t1
WHERE (t1.a=t1.c) AND (t1.a>1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c=2);
a MAX(t1.b) c
2 13 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c=2);
a MAX(t1.b) c
2 13 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c=2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a=t1.c) AND (t1.c=2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2 and t1.c = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c) AND (t1.a=2)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2 and t1.c = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING ((t1.a=t1.c) AND (t1.a>1)) OR ((t1.a<3) AND (t1.c>3));
a MAX(t1.b) c
2 13 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING ((t1.a=t1.c) AND (t1.a>1)) OR ((t1.a<3) AND (t1.c>3));
a MAX(t1.b) c
2 13 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING ((t1.a=t1.c) AND (t1.a>1)) OR ((t1.a<3) AND (t1.c>3));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING ((t1.a=t1.c) AND (t1.a>1)) OR ((t1.a<3) AND (t1.c>3));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c = t1.a and t1.a > 1 or t1.a < 3 and t1.c > 3",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a > 1 or t1.a < 3"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a=t1.c) AND (t1.a>1)) OR (t1.a<3)
GROUP BY t1.a
HAVING ((t1.a=t1.c) AND (t1.a>1)) OR ((t1.a<3) AND (t1.c>3));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c = t1.a and t1.a > 1 or t1.a < 3 and t1.c > 3",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a > 1 or t1.a < 3"
}
}
}
}
}
# conjuctive subformula : pushdown using WHERE multiple equalities
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.c<3);
a MAX(t1.b) c
1 22 1
2 13 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.c<3);
a MAX(t1.b) c
1 22 1
2 13 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.c<3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.c<3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a < 3"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c) AND (t1.c<3)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a < 3"
}
}
}
}
}
# extracted AND-formula : pushdown using WHERE multiple equalities
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.c<3);
a MAX(t1.b) c
2 13 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.c<3);
a MAX(t1.b) c
2 13 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.c<3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (t1.a>1) AND (t1.c<3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a > 1 and t1.a < 3"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c) AND (t1.a>1) AND (t1.c<3)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and t1.a > 1 and t1.a < 3"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4)) AND (t1.a<2);
a MAX(t1.b) c
1 22 1
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4)) AND (t1.a<2);
a MAX(t1.b) c
1 22 1
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4)) AND (t1.a<2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING (((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4)) AND (t1.a<2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a > 1 and max(t1.c) < 3 or t1.c < 4",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and (t1.a > 1 or t1.a < 4) and t1.a < 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c) AND (((t1.a>1) OR (t1.c<4)) AND (t1.a<2))
GROUP BY t1.a
HAVING ((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a > 1 and max(t1.c) < 3 or t1.c < 4",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and (t1.a > 1 or t1.a < 4) and t1.a < 2"
}
}
}
}
}
# extracted OR-formula : pushdown using WHERE multiple equalities
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING ((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4);
a MAX(t1.b) c
1 22 1
2 13 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING ((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4);
a MAX(t1.b) c
1 22 1
2 13 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING ((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c)
GROUP BY t1.a
HAVING ((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a > 1 and max(t1.c) < 3 or t1.c < 4",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and (t1.a > 1 or t1.a < 4)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a=t1.c) AND ((t1.a>1) OR (t1.c<4))
GROUP BY t1.a
HAVING ((t1.a>1) AND (MAX(t1.c)<3)) OR (t1.c<4);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a > 1 and max(t1.c) < 3 or t1.c < 4",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = t1.a and (t1.a > 1 or t1.a < 4)"
}
}
}
}
}
DROP TABLE t1,t2;
DROP VIEW v1;
DROP FUNCTION f1;
#
# MDEV-18668: pushdown from HAVING into impossible WHERE
#
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES (1,1),(2,2);
SELECT a FROM t1 WHERE b = 1 AND b = 2 GROUP BY a HAVING a <= 3;
a
EXPLAIN
SELECT a FROM t1 WHERE b = 1 AND b = 2 GROUP BY a HAVING a <= 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
DROP TABLE t1;
#
# MDEV-18769: unfixed OR condition pushed from HAVING into WHERE
#
CREATE TABLE t1(a INT, b INT, c INT);
CREATE TABLE t3(a INT, b INT, c INT, d INT);
INSERT INTO t1 VALUES (1,14,3), (2,13,2), (1,22,1), (3,13,4), (3,14,2);
INSERT INTO t3 VALUES (1,2,16,1), (1,3,11,2), (2,3,10,2);
# nothing to push
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING t1.b = 13 AND MAX(t1.c) > 2;
a b MAX(t1.c)
3 13 4
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING t1.b = 13 AND MAX(t1.c) > 2;
a b MAX(t1.c)
3 13 4
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING t1.b = 13 AND MAX(t1.c) > 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING t1.b = 13 AND MAX(t1.c) > 2;
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.b = 13 and max(t1.c) > 2",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING t1.b = 13 AND MAX(t1.c) > 2;
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.b = 13 and max(t1.c) > 2",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100
}
}
}
}
}
# extracted AND formula
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14);
a b MAX(t1.c)
2 13 2
3 13 4
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14);
a b MAX(t1.c)
2 13 2
3 13 4
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.b > 10) and t1.b < 14"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a = 1 OR t1.b > 10) AND (t1.b < 14)
GROUP BY t1.a,t1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.b > 10) and t1.b < 14"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR t1.b > 15);
a b MAX(t1.c)
1 22 1
2 13 2
3 13 4
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR t1.b > 15);
a b MAX(t1.c)
1 22 1
2 13 2
3 13 4
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR t1.b > 15);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR t1.b > 15);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.b > 10) and (t1.b < 14 or t1.b > 15)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR t1.b > 15)
GROUP BY t1.a,t1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.b > 10) and (t1.b < 14 or t1.b > 15)"
}
}
}
}
}
# extracted AND formula : equality in the inner AND formula
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR (t1.b > 15 AND t1.a = 2));
a b MAX(t1.c)
2 13 2
3 13 4
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR (t1.b > 15 AND t1.a = 2));
a b MAX(t1.c)
2 13 2
3 13 4
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR (t1.b > 15 AND t1.a = 2));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR (t1.b > 15 AND t1.a = 2));
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.b > 10) and (t1.b < 14 or t1.a = 2 and t1.b > 15)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a = 1 OR t1.b > 10) AND (t1.b < 14 OR (t1.b > 15 AND t1.a = 2))
GROUP BY t1.a,t1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.b > 10) and (t1.b < 14 or t1.a = 2 and t1.b > 15)"
}
}
}
}
}
# extracted OR formula
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2) OR (t1.b = 13 AND t1.a > 2);
a b MAX(t1.c)
1 14 3
1 22 1
3 13 4
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2) OR (t1.b = 13 AND t1.a > 2);
a b MAX(t1.c)
1 14 3
1 22 1
3 13 4
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2) OR (t1.b = 13 AND t1.a > 2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2) OR (t1.b = 13 AND t1.a > 2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a < 2 or t1.b = 13 and t1.a > 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a < 2) OR (t1.b = 13 AND t1.a > 2)
GROUP BY t1.a,t1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a < 2 or t1.b = 13 and t1.a > 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND t1.b = 13);
a b MAX(t1.c)
1 14 3
3 13 4
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND t1.b = 13);
a b MAX(t1.c)
1 14 3
3 13 4
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND t1.b = 13);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND t1.b = 13);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 14 and t1.a < 2 or t1.b = 13 and t1.a > 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND t1.b = 13)
GROUP BY t1.a,t1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 14 and t1.a < 2 or t1.b = 13 and t1.a > 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND (t1.b = 13 OR t1.b = 14));
a b MAX(t1.c)
1 14 3
3 13 4
3 14 2
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND (t1.b = 13 OR t1.b = 14));
a b MAX(t1.c)
1 14 3
3 13 4
3 14 2
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND (t1.b = 13 OR t1.b = 14));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.b
HAVING (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND (t1.b = 13 OR t1.b = 14));
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 14 and t1.a < 2 or t1.a > 2 and (t1.b = 13 or t1.b = 14)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a < 2 AND t1.b = 14) OR (t1.a > 2 AND (t1.b = 13 OR t1.b = 14))
GROUP BY t1.a,t1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 14 and t1.a < 2 or t1.a > 2 and (t1.b = 13 or t1.b = 14)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a < 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
a b MAX(t1.c)
1 14 3
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a < 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
a b MAX(t1.c)
1 14 3
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a < 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a < 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a < 2 and max(t1.c) = 2 or max(t1.c) > 2 and (t1.a = 1 or t1.a = 2)",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a < 2 or t1.a = 1 or t1.a = 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a < 2) OR (t1.a = 1 OR t1.a = 2)
GROUP BY t1.a
HAVING (t1.a < 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a < 2 and max(t1.c) = 2 or max(t1.c) > 2 and (t1.a = 1 or t1.a = 2)",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a < 2 or t1.a = 1 or t1.a = 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
a b MAX(t1.c)
1 14 3
2 13 2
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
a b MAX(t1.c)
1 14 3
2 13 2
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a = 2 and max(t1.c) = 2 or max(t1.c) > 2 and (t1.a = 1 or t1.a = 2)",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2 or t1.a = 1 or t1.a = 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a = 2) OR (t1.a = 1 OR t1.a = 2)
GROUP BY t1.a
HAVING (t1.a = 2 AND MAX(t1.c) = 2) OR (MAX(t1.c) > 2 AND (t1.a = 1 OR t1.a = 2));
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.a = 2 and max(t1.c) = 2 or max(t1.c) > 2 and (t1.a = 1 or t1.a = 2)",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 2 or t1.a = 1 or t1.a = 2"
}
}
}
}
}
# conjunctive subformula : equality pushdown
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 1) AND (MAX(t1.c) = 3);
a b MAX(t1.c)
1 14 3
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 1) AND (MAX(t1.c) = 3);
a b MAX(t1.c)
1 14 3
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 1) AND (MAX(t1.c) = 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a
HAVING (t1.a = 1) AND (MAX(t1.c) = 3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.c) = 3",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (MAX(t1.c) = 3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.c) = 3",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1"
}
}
}
# conjunctive subformula : equalities pushdown
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 3) AND MAX(t1.b = 14);
a b MAX(t1.c)
1 14 3
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 3) AND MAX(t1.b = 14);
a b MAX(t1.c)
1 14 3
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 3) AND MAX(t1.b = 14);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 3) AND MAX(t1.b = 14);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b = 14)",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a = 1) AND (t1.c = 3)
GROUP BY t1.a,t1.c
HAVING (MAX(t1.b) = 14);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) = 14",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 3"
}
}
}
# conjunctive subformula : multiple equality consists of
two equalities pushdown
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 1) AND MAX(t1.b = 14);
a b MAX(t1.c)
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 1) AND MAX(t1.b = 14);
a b MAX(t1.c)
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 1) AND MAX(t1.b = 14);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
GROUP BY t1.a,t1.c
HAVING (t1.a = 1) AND (t1.c = 1) AND MAX(t1.b = 14);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b = 14)",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.a = 1) AND (t1.c = 1)
GROUP BY t1.a,t1.c
HAVING (MAX(t1.b) = 14);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "max(t1.b) = 14",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 1"
}
}
}
#
# Pushdown from HAVING into non-empty WHERE
#
# inequality : inequality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a < 3);
a b MAX(t1.c)
1 14 3
2 13 2
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a < 3);
a b MAX(t1.c)
1 14 3
2 13 2
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a < 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a < 3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b > 2 and t1.a < 3"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2) AND (t1.a < 3)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b > 2 and t1.a < 3"
}
}
}
}
}
# equality : inequality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a = 3);
a b MAX(t1.c)
3 13 4
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a = 3);
a b MAX(t1.c)
3 13 4
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a = 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2)
GROUP BY t1.a
HAVING (t1.a = 3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 3 and t1.b > 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b > 2) AND (t1.a = 3)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 3 and t1.b > 2"
}
}
}
# inequality : equality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a < 3);
a b MAX(t1.c)
1 14 3
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a < 3);
a b MAX(t1.c)
1 14 3
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a < 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a < 3);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 14 and t1.a < 3"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14) AND (t1.a < 3)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 14 and t1.a < 3"
}
}
}
}
}
# equality : equality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a = 1);
a b MAX(t1.c)
1 14 3
SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a = 1);
a b MAX(t1.c)
1 14 3
explain SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14)
GROUP BY t1.a
HAVING (t1.a = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.b = 14"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,t1.b,MAX(t1.c)
FROM t1
WHERE (t1.b = 14) AND (t1.a = 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.b = 14 and t1.a = 1"
}
}
}
# equality : equality in WHERE, impossible WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.c)
FROM t1
WHERE (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.c)
SELECT t1.a,MAX(t1.c)
FROM t1
WHERE (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.c)
explain SELECT t1.a,MAX(t1.c)
FROM t1
WHERE (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
explain format=json SELECT t1.a,MAX(t1.c)
FROM t1
WHERE (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.c)
FROM t1
WHERE (t1.a = 3) AND (t1.a = 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
# equality : equality in WHERE (equal through constant)
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c = 1)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b) c
1 22 1
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c = 1)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b) c
1 22 1
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c = 1)
GROUP BY t1.a
HAVING (t1.a = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c = 1)
GROUP BY t1.a
HAVING (t1.a = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c = 1) AND (t1.a = 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c = 1 and t1.a = 1"
}
}
}
# inequality : AND formula in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a > 1);
a MAX(t1.b) c
2 13 2
3 14 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a > 1);
a MAX(t1.b) c
2 13 2
3 14 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c > 0 and t1.c < 3 and t1.a > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3) AND (t1.a > 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.c > 0 and t1.c < 3 and t1.a > 1"
}
}
}
}
}
# equality : AND formula in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b) c
1 22 1
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b) c
1 22 1
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c > 0 and t1.c < 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.c > 0) AND (t1.c < 3) AND (t1.a = 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c > 0 and t1.c < 3"
}
}
}
# equality : AND formula in WHERE, impossible WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b) c
1 22 1
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b) c
1 22 1
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 0) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"const_condition": "1",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c < 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 0) AND (t1.c < 3) AND (t1.a = 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c < 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 0) AND (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b)
SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 0) AND (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
a MAX(t1.b)
explain SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 0) AND (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 0) AND (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 0) AND (t1.a = 3) AND (t1.a = 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.b = 2) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.a = 1);
a b MAX(t3.c) d
1 2 16 1
SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.b = 2) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.a = 1);
a b MAX(t3.c) d
1 2 16 1
explain SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.b = 2) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.a = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where
explain format=json SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.b = 2) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.a = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.b = 2 and t3.d = 1 and t3.a = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.b = 2) AND (t3.d = 1) AND (t3.a = 1)
GROUP BY t3.a,t3.b,t3.d;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.b = 2 and t3.d = 1 and t3.a = 1"
}
}
}
# inequality : OR formula in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 2);
a MAX(t1.b) c
1 22 1
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 2);
a MAX(t1.b) c
1 22 1
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a > 1 or t1.c < 3) and t1.a < 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a > 1) OR (t1.c < 3)) AND (t1.a < 2)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a > 1 or t1.c < 3) and t1.a < 2"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 2);
a MAX(t1.b)
SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 2);
a MAX(t1.b)
explain SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a
HAVING (t1.a = 2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b)
FROM t1
WHERE ((t1.a = 1) OR (t1.a = 3)) AND (t1.a = 2)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
# AND formula : inequality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
a MAX(t1.b) c
2 13 2
3 14 4
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
a MAX(t1.b) c
2 13 2
3 14 4
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.a < 4 and t1.a > 0"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) AND (t1.a < 4) AND (t1.a > 0)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.a < 4 and t1.a > 0"
}
}
}
}
}
# AND formula : equality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
a MAX(t1.b) c
1 22 3
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
a MAX(t1.b) c
1 22 3
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.a > 0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"const_condition": "1 and 1",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a < 4) AND (t1.a > 0)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1"
}
}
}
# OR formula : inequality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
a MAX(t1.b) c
2 13 2
3 14 4
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
a MAX(t1.b) c
2 13 2
3 14 4
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and (t1.a < 4 or t1.a > 0)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) AND ((t1.a < 4) OR (t1.a > 0))
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and (t1.a < 4 or t1.a > 0)"
}
}
}
}
}
# OR formula : equality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
a MAX(t1.b) c
1 22 3
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
a MAX(t1.b) c
1 22 3
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.a < 4) OR (t1.a > 0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"const_condition": "1",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND ((t1.a < 4) OR (t1.a > 0))
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1"
}
}
}
# AND formula : AND formula in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
2 13 2
3 14 2
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
2 13 2
3 14 2
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) AND (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c > 1",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.c < 3 and t1.a < 4"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a > 1) AND (t1.c < 3)) AND
(t1.a < 4)
GROUP BY t1.a
HAVING (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c > 1",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a > 1 and t1.c < 3 and t1.a < 4"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"const_condition": "1",
"filesort": {
"sort_key": "t1.c",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c < 3 and t1.c > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a = 1) AND (t1.c < 3)) AND
((t1.a < 4) AND (t1.c > 1))
GROUP BY t1.a,t1.c;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.c",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c < 3 and t1.c > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
1 14 3
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
1 14 3
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"const_condition": "1 and 1",
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a = 1) AND (t1.c = 3)) AND
((t1.a < 4) AND (t1.c > 1))
GROUP BY t1.a,t1.c;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 3"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b
HAVING (t3.b = 2) AND (t3.d > 0);
a b MAX(t3.c) d
1 2 16 1
SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b
HAVING (t3.b = 2) AND (t3.d > 0);
a b MAX(t3.c) d
1 2 16 1
explain SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b
HAVING (t3.b = 2) AND (t3.d > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where
explain format=json SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b
HAVING (t3.b = 2) AND (t3.d > 0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t3.d > 0",
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.a = 1 and t3.d = 1 and t3.b = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1) AND
(t3.b = 2)
GROUP BY t3.a,t3.b
HAVING (t3.d > 0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t3.d > 0",
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.a = 1 and t3.d = 1 and t3.b = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.b = 2) AND (t3.d > 0);
a b MAX(t3.c) d
1 2 16 1
SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.b = 2) AND (t3.d > 0);
a b MAX(t3.c) d
1 2 16 1
explain SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.b = 2) AND (t3.d > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where
explain format=json SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1)
GROUP BY t3.a,t3.b,t3.d
HAVING (t3.b = 2) AND (t3.d > 0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"const_condition": "1",
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.a = 1 and t3.d = 1 and t3.b = 2"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a = 1) AND (t3.d = 1) AND
(t3.b = 2) AND (t3.d > 0)
GROUP BY t3.a,t3.b,t3.d;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.a = 1 and t3.d = 1 and t3.b = 2"
}
}
}
# AND formula : OR formula in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
2 13 2
3 14 4
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
2 13 2
3 14 4
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a
HAVING (t1.a < 4) AND (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c > 1",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a > 1 or t1.c < 3) and t1.a < 4"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a > 1) OR (t1.c < 3)) AND
(t1.a < 4)
GROUP BY t1.a
HAVING (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "t1.c > 1",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a > 1 or t1.c < 3) and t1.a < 4"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
2 13 2
3 14 2
3 13 4
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
a MAX(t1.b) c
2 13 2
3 14 2
3 13 4
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a > 1) OR (t1.c < 3)
GROUP BY t1.a,t1.c
HAVING (t1.a < 4) AND (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.c",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a > 1 or t1.c < 3) and t1.a < 4 and t1.c > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a > 1) OR (t1.c < 3)) AND
(t1.a < 4) AND (t1.c > 1)
GROUP BY t1.a,t1.c;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.c",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a > 1 or t1.c < 3) and t1.a < 4 and t1.c > 1"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a = 4) OR (t1.c > 1);
a MAX(t1.b) c
1 14 3
3 14 2
3 13 4
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a = 4) OR (t1.c > 1);
a MAX(t1.b) c
1 14 3
3 14 2
3 13 4
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a = 4) OR (t1.c > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) OR (t1.a = 3)
GROUP BY t1.a,t1.c
HAVING (t1.a = 4) OR (t1.c > 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.c",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.a = 3) and (t1.a = 4 or t1.c > 1)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE ((t1.a = 1) OR (t1.a = 3)) AND
((t1.a = 4) OR (t1.c > 1))
GROUP BY t1.a,t1.c;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.c",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "(t1.a = 1 or t1.a = 3) and (t1.a = 4 or t1.c > 1)"
}
}
}
}
}
# equality : pushdown through equality in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1);
a MAX(t1.b) c
1 22 1
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1);
a MAX(t1.b) c
1 22 1
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c) AND (t1.c = 1)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 1"
}
}
}
# OR formula : pushdown through equality
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1) OR (t1.c = 2);
a MAX(t1.b) c
1 22 1
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1) OR (t1.c = 2);
a MAX(t1.b) c
1 22 1
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1) OR (t1.c = 2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 1) OR (t1.c = 2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 1"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c) AND
((t1.c = 1) OR (t1.c = 2))
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 5,
"filtered": 100,
"attached_condition": "t1.a = 1 and t1.c = 1"
}
}
}
# OR formula : pushdown through equality, impossible WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 3) OR (t1.c = 2);
a MAX(t1.b) c
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 3) OR (t1.c = 2);
a MAX(t1.b) c
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 3) OR (t1.c = 2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c)
GROUP BY t1.a
HAVING (t1.c = 3) OR (t1.c = 2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.a = t1.c) AND
((t1.c = 3) OR (t1.c = 2))
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
# AND formula : pushdown through equality, impossible WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a,t1.c
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
a MAX(t1.b) c
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a,t1.c
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
a MAX(t1.b) c
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a,t1.c
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a,t1.c
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c = 3) AND
(t1.a > 2) AND (t1.a = t1.c)
GROUP BY t1.a,t1.c;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
a MAX(t1.b) c
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
a MAX(t1.b) c
explain SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1)
GROUP BY t1.a
HAVING (t1.c = 3) AND (t1.a > 2) AND (t1.a = t1.c);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t1.a,MAX(t1.b),t1.c
FROM t1
WHERE (t1.a = 1) AND (t1.c = 3) AND
(t1.a > 2) AND (t1.a = t1.c)
GROUP BY t1.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"message": "Impossible WHERE"
}
}
}
# AND formula with OR subformula : AND condition in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND ((t3.d = 1) OR (t3.d > 1));
a MAX(t3.b) c d
SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND ((t3.d = 1) OR (t3.d > 1));
a MAX(t3.b) c d
explain SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND ((t3.d = 1) OR (t3.d > 1));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using temporary; Using filesort
explain format=json SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND ((t3.d = 1) OR (t3.d > 1));
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t3.a",
"temporary_table": {
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.d = t3.a and t3.a > 1 and (t3.c = 3 or t3.c < 2) and (t3.a = 1 or t3.a > 1)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t3.a,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2)) AND
(t3.a = t3.d) AND ((t3.d = 1) OR (t3.d > 1))
GROUP BY t3.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t3.a",
"temporary_table": {
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.d = t3.a and t3.a > 1 and (t3.c = 3 or t3.c < 2) and (t3.a = 1 or t3.a > 1)"
}
}
}
}
}
# AND formula with OR subformula : AND condition in WHERE
set statement optimizer_switch='condition_pushdown_from_having=off' for SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND (((t3.d = t3.c) AND (t3.c < 15)) OR (t3.d > 1));
a MAX(t3.b) c d
SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND (((t3.d = t3.c) AND (t3.c < 15)) OR (t3.d > 1));
a MAX(t3.b) c d
explain SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND (((t3.d = t3.c) AND (t3.c < 15)) OR (t3.d > 1));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using temporary; Using filesort
explain format=json SELECT t3.a,MAX(t3.b),t3.c,t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2))
GROUP BY t3.a
HAVING (t3.a = t3.d) AND (((t3.d = t3.c) AND (t3.c < 15)) OR (t3.d > 1));
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t3.a",
"temporary_table": {
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.d = t3.a and t3.a > 1 and (t3.c = 3 or t3.c < 2) and (t3.c = t3.a and t3.c < 15 or t3.a > 1)"
}
}
}
}
}
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT t3.a,t3.b,MAX(t3.c),t3.d
FROM t3
WHERE (t3.a > 1) AND ((t3.c = 3) OR (t3.c < 2)) AND
(t3.a = t3.d) AND (((t3.d = t3.c) AND (t3.c < 15)) OR (t3.d > 1))
GROUP BY t3.a;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t3.a",
"temporary_table": {
"table": {
"table_name": "t3",
"access_type": "ALL",
"rows": 3,
"filtered": 100,
"attached_condition": "t3.d = t3.a and t3.a > 1 and (t3.c = 3 or t3.c < 2) and (t3.c = t3.a and t3.a < 15 or t3.a > 1)"
}
}
}
}
}
# prepare statement
PREPARE stmt1 from "
SELECT t1.a,MAX(t1.b),t1.c
FROM t1
GROUP BY t1.a
HAVING (t1.a = 1)
";
execute stmt1;
a MAX(t1.b) c
1 22 3
execute stmt1;
a MAX(t1.b) c
1 22 3
deallocate prepare stmt1;
DROP TABLE t1,t3;
#
# MDEV-19185: pushdown constant function with subquery
#
CREATE TABLE t1 (pk INT, c1 VARCHAR(64));
INSERT INTO t1 VALUES (1,'bbb'),(2,'aaa'),(3,'ccc');
CREATE VIEW v1 AS SELECT * FROM t1;
SELECT pk
FROM t1
GROUP BY pk
HAVING (1 NOT IN (SELECT COUNT(t1.c1) FROM (v1, t1)));
pk
1
2
3
DROP TABLE t1;
DROP VIEW v1;
#
# MDEV-19186: temporary table defined with view field in HAVING
#
CREATE TABLE t1 (pk INT, x VARCHAR(10));
INSERT INTO t1 VALUES (1,'y'),(2,'s'),(3,'aaa');
CREATE VIEW v1 AS SELECT * FROM t1;
CREATE TABLE t2 (pk INT, x VARCHAR(10));
INSERT INTO t2 VALUES (1,'aa'),(2,'t'),(3,'bb');
CREATE TABLE tmp1
SELECT v1.pk
FROM t2,v1
WHERE v1.x = t2.x
GROUP BY v1.pk
HAVING (v1.pk = 1);
DROP TABLE t1,t2,tmp1;
DROP VIEW v1;
#
# MDEV-19164: pushdown of condition with cached items
#
create table t1 (d1 date);
insert into t1 values (null),('1971-03-06'),('1993-06-05'),('1998-07-08');
select d1 from t1
group by d1
having d1 between (inet_aton('1978-04-27')) and '2018-08-26';
d1
explain extended select d1 from t1
group by d1
having d1 between (inet_aton('1978-04-27')) and '2018-08-26';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 100.00 Using where; Using temporary; Using filesort
Warnings:
Note 1003 select `test`.`t1`.`d1` AS `d1` from `test`.`t1` where `test`.`t1`.`d1` between <cache>(inet_aton('1978-04-27')) and <cache>('2018-08-26') group by `test`.`t1`.`d1` having 1
explain format=json select d1 from t1
group by d1
having d1 between (inet_aton('1978-04-27')) and '2018-08-26';
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.d1",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "t1.d1 between <cache>(inet_aton('1978-04-27')) and <cache>('2018-08-26')"
}
}
}
}
}
delete from t1;
insert into t1 values ('2018-01-15'),('2018-02-20');
select d1 from t1
group by d1
having d1 not between 0 AND exp(0);
d1
2018-01-15
2018-02-20
Warnings:
Warning 1292 Truncated incorrect datetime value: '1'
explain extended select d1 from t1
group by d1
having d1 not between 0 AND exp(0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary; Using filesort
Warnings:
Note 1003 select `test`.`t1`.`d1` AS `d1` from `test`.`t1` where `test`.`t1`.`d1` not between <cache>(0) and <cache>(exp(0)) group by `test`.`t1`.`d1` having 1
explain format=json select d1 from t1
group by d1
having d1 not between 0 AND exp(0);
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.d1",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 2,
"filtered": 100,
"attached_condition": "t1.d1 not between <cache>(0) and <cache>(exp(0))"
}
}
}
}
}
drop table t1;
#
# MDEV-19245: Impossible WHERE should be noticed earlier
# after HAVING pushdown
#
CREATE TABLE t1 (a INT, b INT, c INT);
INSERT INTO t1 VALUES (1,2,1),(3,2,2),(5,6,4),(3,4,1);
EXPLAIN SELECT t1.a,MAX(t1.b) FROM t1
WHERE t1.a > 3 GROUP BY t1.a HAVING t1.a = 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
EXPLAIN SELECT t1.a,MAX(t1.b) FROM t1
WHERE t1.a = 3 GROUP BY t1.a HAVING t1.a > 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
EXPLAIN SELECT t1.a,MAX(t1.b) FROM t1
WHERE t1.a > 3 AND t1.a = 3 GROUP BY t1.a ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
EXPLAIN SELECT t1.a,MAX(t1.b) FROM t1
WHERE (t1.a < 2 OR t1.c > 1) GROUP BY t1.a HAVING t1.a = 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where
EXPLAIN SELECT t1.a,MAX(t1.b) FROM t1
WHERE t1.a = 3 GROUP BY t1.a HAVING (t1.a < 2 OR t1.a > 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
EXPLAIN SELECT t1.a,MAX(t1.b) FROM t1
WHERE t1.a = 3 AND (t1.a < 2 OR t1.a > 3) GROUP BY t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
EXPLAIN SELECT t1.a,MAX(t1.b),t1.c FROM t1
WHERE (t1.a < 2 AND t1.c > 1) GROUP BY t1.a HAVING t1.a = 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
EXPLAIN SELECT t1.a,MAX(t1.b),t1.c FROM t1
WHERE t1.a = 3 GROUP BY t1.a HAVING (t1.a < 2 AND t1.c > 1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
EXPLAIN SELECT t1.a,MAX(t1.b),t1.c FROM t1
WHERE t1.a = 3 AND (t1.a < 2 AND t1.b > 3) GROUP BY t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
DROP TABLE t1;
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