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mariadb/mysql-test/main/having_cond_pushdown.result
Igor Babaev 1c97cd339e MDEV-21184 Assertion `used_tables_cache == 0' failed in Item_func::fix_fields 
with condition_pushdown_from_having

This bug could manifest itself for queries with GROUP BY and HAVING clauses
when the HAVING clause was a conjunctive condition that depended
exclusively on grouping fields and at least one conjunct contained an
equality of the form fld=sq where fld is a grouping field and sq is a
constant subquery.
In this case the optimizer tries to perform a pushdown of the HAVING
condition into WHERE. To construct the pushable condition the optimizer
first transforms all multiple equalities in HAVING into simple equalities.
This has to be done for a proper processing of the pushed conditions
in WHERE. The multiple equalities at all AND/OR levels must be converted
to simple equalities because any multiple equality may refer to a multiple
equality at the upper level.
Before this patch the conversion was performed like this:
  multiple_equality(x,f1,...,fn) => x=f1 and ... and x=fn.
When an equality item for x=fi was constructed both the items for x and fi
were cloned. If x happened to be a constant subquery that could not be
cloned the conversion failed. If the conversions of multiple equalities
previously performed had succeeded then the whole condition became in an
inconsistent state that could cause different failures.
The solution provided by the patch is:
1. to use a different conversion rule if x is a constant
  multiple_equality(x,f1,...,fn) => f1=x and f2=f1 and ... and fn=f1
2. not to clone x if it's a constant.
Such conversions cannot fail and besides the result of the conversion
preserves the equivalence of f1,...,fn that can be used for other
optimizations.
This patch also made sure that expensive predicates are not pushed from
HAVING to WHERE.
2020-01-15 12:57:19 -08:00

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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;
#
# MDEV-21184: Constant subquery in condition movable to WHERE
#
CREATE TABLE t1(a int, b int);
INSERT INTO t1 VALUES
(1,10), (2,20), (1,11), (1,15), (2,20), (1,10), (2,21);
CREATE TABLE t2 (c INT);
INSERT INTO t2 VALUES (2),(3);
EXPLAIN FORMAT=JSON SELECT a FROM t1 GROUP BY a HAVING a = 8 OR a = ( SELECT MIN(c) FROM t2 );
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 7,
"filtered": 100,
"attached_condition": "t1.a = 8 or t1.a = (subquery#2)"
},
"subqueries": [
{
"query_block": {
"select_id": 2,
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 2,
"filtered": 100
}
}
}
]
}
}
}
}
SELECT a FROM t1 GROUP BY a HAVING a = 8 OR a = ( SELECT MIN(c) FROM t2 );
a
2
EXPLAIN FORMAT=JSON SELECT a FROM t1 GROUP BY a,b
HAVING ( a = 8 OR a = ( SELECT MIN(c) FROM t2 ) ) and b < 20;
EXPLAIN
{
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "t1.a, t1.b",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 7,
"filtered": 100,
"attached_condition": "(t1.a = 8 or t1.a = (subquery#2)) and t1.b < 20"
},
"subqueries": [
{
"query_block": {
"select_id": 2,
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 2,
"filtered": 100
}
}
}
]
}
}
}
}
SELECT a FROM t1 GROUP BY a,b
HAVING ( a = 8 OR a = ( SELECT MIN(c) FROM t2 ) ) and b < 20;
a
EXPLAIN FORMAT=JSON SELECT a FROM t1 GROUP BY a
HAVING ( a = 8 OR a = ( SELECT MIN(c) FROM t2 ) ) and SUM(b) > 20;
EXPLAIN
{
"query_block": {
"select_id": 1,
"having_condition": "sum(t1.b) > 20",
"filesort": {
"sort_key": "t1.a",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 7,
"filtered": 100,
"attached_condition": "t1.a = 8 or t1.a = (subquery#2)"
},
"subqueries": [
{
"query_block": {
"select_id": 2,
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 2,
"filtered": 100
}
}
}
]
}
}
}
}
SELECT a FROM t1 GROUP BY a
HAVING ( a = 8 OR a = ( SELECT MIN(c) FROM t2 ) ) and SUM(b) > 20;
a
2
EXPLAIN FORMAT=JSON SELECT a FROM t1 GROUP BY a HAVING a = ( SELECT MIN(c) FROM t2 );
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 7,
"filtered": 100,
"attached_condition": "t1.a = (subquery#2)"
},
"subqueries": [
{
"query_block": {
"select_id": 2,
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 2,
"filtered": 100
}
}
}
]
}
}
SELECT a FROM t1 GROUP BY a HAVING a = ( SELECT MIN(c) FROM t2 );
a
2
DROP TABLE t1,t2;
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