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Bug
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Major
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Resolution:
Fixed
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10.6, 10.7(EOL), 10.8(EOL), 10.9(EOL), 10.10(EOL), 11.0(EOL)
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create table t10 (
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a int,
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b int
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);
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insert into t10 select seq, seq/3 from seq_0_to_999;
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create table t11 (
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a int,
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b int
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);
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insert into t11 select seq, seq/5 from seq_0_to_999;
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set join_cache_level=6;
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analyze format=json
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select * from t10, t11
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where
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t10.a < 700 and
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t11.a < 100
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and t10.b=t11.b;
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will produce
{
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"block-nl-join": {
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"table": {
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"table_name": "t11",
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"access_type": "hash_ALL",
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"key": "#hash#$hj",
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"key_length": "5",
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"used_key_parts": ["b"],
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"ref": ["test.t10.b"],
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"loops": 1000,
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"r_loops": 1,
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"rows": 1000,
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"r_rows": 1000,
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"cost": 9.5143874,
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"r_table_time_ms": 0.117991585,
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"r_other_time_ms": 0.403368737,
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"filtered": 100,
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"r_filtered": 10,
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"attached_condition": "t11.a < 100"
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},
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"buffer_type": "flat",
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"buffer_size": "36Kb",
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"join_type": "BNLH",
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"attached_condition": "t11.b = t10.b",
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"r_filtered": 100,
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"r_unpack_time_ms": 0
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}
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}
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Note the
- relates to
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MDEV-30972
ANALYZE FORMAT=JSON: some time is unaccounted-for in BNL-H joins
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-
Closed
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