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30 lines
900 B
Text
30 lines
900 B
Text
drop table if exists t1,t2;
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#
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# MDEV-21958: Query having many NOT-IN clauses running forever
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#
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create table t2 (
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pk int primary key,
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key1 int,
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col1 int,
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key (key1, pk)
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);
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insert into t2 (pk, key1) values (1,1),(2,2),(3,3),(4,4),(5,5);
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set @tmp_21958=@@optimizer_trace;
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set optimizer_trace=1;
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explain select * from t2 where key1 in (1,2,3) and pk not in (1,2,3);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL PRIMARY,key1 NULL NULL NULL 5 Using where
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# This should show only ranges in form "(1) <= (key1) <= (1)"
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# ranges over "pk" should not be constructed.
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select json_detailed(JSON_EXTRACT(trace, '$**.ranges'))
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from information_schema.optimizer_trace;
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json_detailed(JSON_EXTRACT(trace, '$**.ranges'))
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[
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[
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"(1) <= (key1) <= (1)",
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"(2) <= (key1) <= (2)",
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"(3) <= (key1) <= (3)"
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]
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]
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set optimizer_trace=@tmp_21958;
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drop table t2;
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