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|
drop table if exists t0,t1,t2,t3;
create table t0 (a int);
INSERT INTO t0 VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
# r_filtered=30%, because 3 rows match: 0,1,2
analyze format=json select * from t0 where a<3;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t0",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 30,
"attached_condition": "(t0.a < 3)"
}
}
}
create table t1 (a int, b int, c int, key(a));
insert into t1 select A.a*10 + B.a, A.a*10 + B.a, A.a*10 + B.a from t0 A, t0 B;
analyze
select * from t0, t1 where t1.a=t0.a and t0.a > 9;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 0.00 Using where
1 SIMPLE t1 ref a a 5 test.t0.a 1 NULL 100.00 NULL
analyze format=json
select * from t0, t1 where t1.a=t0.a and t0.a > 9;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t0",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 0,
"attached_condition": "((t0.a > 9) and (t0.a is not null))"
},
"table": {
"table_name": "t1",
"access_type": "ref",
"possible_keys": ["a"],
"key": "a",
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t0.a"],
"r_loops": 0,
"rows": 1,
"r_rows": null,
"filtered": 100,
"r_filtered": null
}
}
}
analyze
select * from t0, t1 where t1.a=t0.a and t1.b<4;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
1 SIMPLE t1 ref a a 5 test.t0.a 1 1.00 100.00 40.00 Using where
analyze format=json
select * from t0, t1 where t1.a=t0.a and t1.b<4;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t0",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100,
"attached_condition": "(t0.a is not null)"
},
"table": {
"table_name": "t1",
"access_type": "ref",
"possible_keys": ["a"],
"key": "a",
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t0.a"],
"r_loops": 10,
"rows": 1,
"r_rows": 1,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 40,
"attached_condition": "(t1.b < 4)"
}
}
}
analyze
select * from t1 tbl1, t1 tbl2 where tbl1.b<2 and tbl2.b>5;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE tbl1 ALL NULL NULL NULL NULL 100 100.00 100.00 2.00 Using where
1 SIMPLE tbl2 ALL NULL NULL NULL NULL 100 100.00 100.00 94.00 Using where; Using join buffer (flat, BNL join)
analyze format=json
select * from t1 tbl1, t1 tbl2 where tbl1.b<20 and tbl2.b<60;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "tbl1",
"access_type": "ALL",
"r_loops": 1,
"rows": 100,
"r_rows": 100,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 20,
"attached_condition": "(tbl1.b < 20)"
},
"block-nl-join": {
"table": {
"table_name": "tbl2",
"access_type": "ALL",
"r_loops": 1,
"rows": 100,
"r_rows": 100,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 60,
"attached_condition": "(tbl2.b < 60)"
},
"buffer_type": "flat",
"buffer_size": "128Kb",
"join_type": "BNL",
"r_filtered": 100
}
}
}
analyze format=json
select * from t1 tbl1, t1 tbl2 where tbl1.b<20 and tbl2.b<60 and tbl1.c > tbl2.c;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "tbl1",
"access_type": "ALL",
"r_loops": 1,
"rows": 100,
"r_rows": 100,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 20,
"attached_condition": "(tbl1.b < 20)"
},
"block-nl-join": {
"table": {
"table_name": "tbl2",
"access_type": "ALL",
"r_loops": 1,
"rows": 100,
"r_rows": 100,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 60,
"attached_condition": "(tbl2.b < 60)"
},
"buffer_type": "flat",
"buffer_size": "128Kb",
"join_type": "BNL",
"attached_condition": "(tbl1.c > tbl2.c)",
"r_filtered": 15.833
}
}
}
drop table t1;
drop table t0;
#
# MDEV-7674: ANALYZE shows r_rows=0
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, key(a));
insert into t2 values (0),(1);
analyze format=json select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100,
"attached_condition": "(t1.a is not null)"
},
"table": {
"table_name": "t2",
"access_type": "ref",
"possible_keys": ["a"],
"key": "a",
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t1.a"],
"r_loops": 10,
"rows": 2,
"r_rows": 0.2,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100,
"using_index": true
}
}
}
drop table t1,t2;
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
#
# MDEV-7679: ANALYZE crashes when printing WHERE when no default db
#
select database();
database()
test
select database();
database()
NULL
analyze format=json select * from test.t1 where t1.a<5;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 50,
"attached_condition": "(test.t1.a < 5)"
}
}
}
drop table t1;
#
# MDEV-7812: ANALYZE FORMAT=JSON UPDATE/DELETE doesnt print
# the r_total_time_ms
#
create table t2(a int);
insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t3(a int);
insert into t3 select A.a + B.a* 10 + C.a * 100 from t2 A, t2 B, t2 C;
create table t1 (pk int primary key);
insert into t1 select a from t3;
alter table t1 add b int;
analyze format=json
update t1 set b=pk;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_total_time_ms": "REPLACED",
"table": {
"update": 1,
"table_name": "t1",
"access_type": "ALL",
"rows": 1000,
"r_rows": 1000,
"r_filtered": 100,
"r_total_time_ms": "REPLACED"
}
}
}
analyze format=json
select * from t1 where pk < 10 and b > 4;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "range",
"possible_keys": ["PRIMARY"],
"key": "PRIMARY",
"key_length": "4",
"used_key_parts": ["pk"],
"r_loops": 1,
"rows": 11,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 50,
"index_condition": "(t1.pk < 10)",
"attached_condition": "(t1.b > 4)"
}
}
}
analyze format=json
delete from t1 where pk < 10 and b > 4;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_total_time_ms": "REPLACED",
"table": {
"delete": 1,
"table_name": "t1",
"access_type": "range",
"possible_keys": ["PRIMARY"],
"key": "PRIMARY",
"key_length": "4",
"used_key_parts": ["pk"],
"rows": 11,
"r_rows": 10,
"r_filtered": 50,
"r_total_time_ms": "REPLACED",
"attached_condition": "((t1.pk < 10) and (t1.b > 4))"
}
}
}
drop table t1, t3, t2;
#
# MDEV-7833:ANALYZE FORMAT=JSON and Range checked for each record
#
create table t3(a int);
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t4(a int);
insert into t4 select A.a + B.a* 10 + C.a * 100 from t3 A, t3 B, t3 C;
create table t1 (lb1 int, rb1 int, lb2 int, rb2 int, c1 int, c2 int);
insert into t1 values (1,2,10,20,15,15);
insert into t1 values (3,5,10,20,15,15);
insert into t1 values (10,20,10,20,15,15);
insert into t1 values (10,20,1,2,15,15);
insert into t1 values (10,20,10,20,1,3);
create table t2 (key1 int, key2 int, key3 int, key4 int, col1 int,
key(key1), key(key2), key(key3), key(key4));
insert into t2 select a,a,a,a,a from t3;
insert into t2 select 15,15,15,15,15 from t4;
analyze format=json
select * from t1, t2 where (t2.key1 between t1.lb1 and t1.rb1) and
(t2.key2 between t1.lb2 and t1.rb2) and
(t2.key3=t1.c1 OR t2.key4=t1.c2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 5,
"r_rows": 5,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
},
"range-checked-for-each-record": {
"keys": ["key1", "key2", "key3", "key4"],
"r_keys": {
"full_scan": 1,
"index_merge": 1,
"range": {
"key1": 2,
"key2": 1,
"key3": 0,
"key4": 0
}
},
"table": {
"table_name": "t2",
"access_type": "ALL",
"possible_keys": ["key1", "key2", "key3", "key4"],
"r_loops": 5,
"rows": 1010,
"r_rows": 203.8,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 98.135
}
}
}
}
drop table t1,t2,t3,t4;
#
# MDEV-7904: ANALYZE FORMAT=JSON SELECT .. UNION SELECT doesn't print r_rows for union output
#
create table t0 (a int);
INSERT INTO t0 VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int);
INSERT INTO t1 select * from t0;
analyze format=json (select * from t1 tbl1 where a<5) union (select * from t1 tbl2 where a in (2,3));
ANALYZE
{
"query_block": {
"union_result": {
"table_name": "<union1,2>",
"access_type": "ALL",
"r_loops": 1,
"r_rows": 5,
"query_specifications": [
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "tbl1",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 50,
"attached_condition": "(tbl1.a < 5)"
}
}
},
{
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "tbl2",
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 20,
"attached_condition": "(tbl2.a in (2,3))"
}
}
}
]
}
}
}
drop table t0, t1;
|
