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#
# MDEV-30830: ANALYZE FORMAT=JSON: r_unpack_time_ms is empty for the hashed joins
#
#
# First, check a regular BNL-join
#
create table t1 (
a int,
b int
);
insert into t1 select seq, seq/3 from seq_0_to_99;
create table t2 (
a int,
b int
);
insert into t2 select seq, seq/5 from seq_0_to_99;
set @js='$out';
set @out=(select json_extract(@js,'$**.block-nl-join.r_unpack_time_ms'));
select cast(json_extract(@out,'$[0]') as DOUBLE) > 0;
cast(json_extract(@out,'$[0]') as DOUBLE) > 0
1
drop table t1,t2;
#
# Now, check the hashed, BNL-H join
#
create table t1 (
a int,
b int
);
insert into t1 select seq, seq/3 from seq_0_to_499;
create table t2 (
a int,
b int
);
insert into t2 select seq, seq/5 from seq_0_to_499;
set @tmp=@@join_cache_level, join_cache_level=6;
select '$out' as X;
X
{
"query_optimization": {
"r_total_time_ms": "REPLACED"
},
"query_block": {
"select_id": 1,
"cost": "REPLACED",
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"nested_loop": [
{
"table": {
"table_name": "t1",
"access_type": "ALL",
"loops": 1,
"r_loops": 1,
"rows": 500,
"r_rows": 500,
"cost": "REPLACED",
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_total_filtered": 100,
"attached_condition": "t1.a < 700 and t1.b is not null",
"r_filtered": 100
}
},
{
"block-nl-join": {
"table": {
"table_name": "t2",
"access_type": "hash_ALL",
"key": "#hash#$hj",
"key_length": "5",
"used_key_parts": ["b"],
"ref": ["test.t1.b"],
"loops": 500,
"r_loops": 1,
"rows": 500,
"r_rows": 500,
"cost": "REPLACED",
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 10,
"r_total_filtered": 20,
"attached_condition": "t2.a < 100",
"r_filtered": 20
},
"buffer_type": "flat",
"buffer_size": "18Kb",
"join_type": "BNLH",
"attached_condition": "t2.b = t1.b",
"r_loops": 500,
"r_filtered": 100,
"r_unpack_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_effective_rows": 0.594
}
}
]
}
}
set @out=(select json_extract(@js,'$**.block-nl-join.r_unpack_time_ms'));
select cast(json_extract(@out,'$[0]') as DOUBLE) > 0;
cast(json_extract(@out,'$[0]') as DOUBLE) > 0
1
set join_cache_level=@tmp;
drop table t1, t2;
#
# MDEV-30972: ANALYZE FORMAT=JSON: some time is unaccounted-for in BNL-H join
#
create table t1 (
a int,
col1 varchar(100),
col2 varchar(100),
col3 varchar(100)
);
insert into t1 select
seq/100,
concat('col1-', seq),
concat('col1-', seq),
concat('col1-', seq)
from seq_1_to_1000;
create table t2 (
a int,
col1 varchar(100),
col2 varchar(100),
col3 varchar(100)
);
insert into t2 select
seq/100,
concat('col1-', seq),
concat('col1-', seq),
concat('col1-', seq)
from seq_1_to_2000;
set @tmp=@@join_cache_level, join_cache_level=6;
select '$out' as X;
X
{
"query_optimization": {
"r_total_time_ms": "REPLACED"
},
"query_block": {
"select_id": 1,
"cost": "REPLACED",
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"nested_loop": [
{
"table": {
"table_name": "t1",
"access_type": "ALL",
"loops": 1,
"r_loops": 1,
"rows": 1000,
"r_rows": 1000,
"cost": "REPLACED",
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_total_filtered": 100,
"attached_condition": "t1.a is not null",
"r_filtered": 100
}
},
{
"block-nl-join": {
"table": {
"table_name": "t2",
"access_type": "hash_ALL",
"key": "#hash#$hj",
"key_length": "5",
"used_key_parts": ["a"],
"ref": ["test.t1.a"],
"loops": 1000,
"r_loops": 1,
"rows": 2000,
"r_rows": 2000,
"cost": "REPLACED",
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 10,
"r_total_filtered": 100,
"r_filtered": 100
},
"buffer_type": "flat",
"buffer_size": "256Kb",
"join_type": "BNLH",
"attached_condition": "t2.a = t1.a and concat(t1.col1,t1.col2,t1.col3) = concat(t2.col1,t2.col2,t2.col3)",
"r_loops": 1000,
"r_filtered": 1.025630506,
"r_unpack_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_effective_rows": 97.501
}
}
]
}
}
set @out=(select json_extract(@js,'$**.block-nl-join.r_other_time_ms'));
select cast(json_extract(@out,'$[0]') as DOUBLE) > 0;
cast(json_extract(@out,'$[0]') as DOUBLE) > 0
1
set join_cache_level=@tmp;
drop table t1, t2;
|
