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EXPLAIN FORMAT=JSON: Support "range checked for each record"

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Sergei Petrunia
2014-12-06 02:23:37 +03:00
parent 9cac7649ea
commit a80a797686
5 changed files with 82 additions and 15 deletions
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26
mysql-test/r/explain_json.result
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@ -691,5 +691,31 @@ EXPLAIN
}
}
}
# 'Range checked for each record'
set optimizer_switch=@tmp;
explain format=json
select * from t1 tbl1, t1 tbl2 where tbl2.a < tbl1.b;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "tbl1",
"access_type": "ALL",
"rows": 100,
"filtered": 100
},
"range-checked-for-each-record": {
"keys": ["a"],
"table": {
"table_name": "tbl2",
"access_type": "ALL",
"possible_keys": ["a"],
"rows": 100,
"filtered": 100
}
}
}
}
drop table t1;
drop table t0;