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642aa4366d
tell the optimizer that every TokuDB "clustering" index is the "covering" index in the MariaDB optimizer sense.
20 lines
583 B
Text
20 lines
583 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 blob)engine=tokudb;
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insert into foo values (1,"one");
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insert into foo values (3,"three");
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insert into foo values (5,"five");
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insert into foo values (2,"two");
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insert into foo values (4,"four");
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alter table foo add key a(a) clustering=yes;
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explain select * From foo where a > 0;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE foo index a a 5 NULL NULL; Using where; Using index
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select * From foo where a > 0;
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a b
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1 one
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2 two
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3 three
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4 four
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5 five
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DROP TABLE foo;
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