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642aa4366d
tell the optimizer that every TokuDB "clustering" index is the "covering" index in the MariaDB optimizer sense.
13 lines
454 B
Text
13 lines
454 B
Text
SET DEFAULT_STORAGE_ENGINE = 'tokudb';
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DROP TABLE IF EXISTS foo;
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create table foo (a int, b int, c int, key (a) clustering=yes)engine=tokudb;
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insert into foo values (1,1,1),(1,2,2),(1,3,3),(2,1,4),(2,2,5),(2,3,6),(3,1,7),(3,2,8);
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explain select * From foo where a = 2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE foo ref a a 5 const NULL; Using index
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select * From foo where a = 2;
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a b c
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2 1 4
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2 2 5
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2 3 6
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DROP TABLE foo;
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