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19 lines
820 B
19 lines
820 B
create table mysql.engine_cost
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(
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engine_name varchar(64) not null,
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device_type int not null,
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cost_name varchar(64) not null,
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cost_value float null,
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last_update timestamp default CURRENT_TIMESTAMP not null on update CURRENT_TIMESTAMP,
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comment varchar(1024) null,
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default_value float as ((case `cost_name`
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when _utf8mb4'io_block_read_cost' then 1.0
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when _utf8mb4'memory_block_read_cost' then 0.25
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else NULL end)),
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primary key (cost_name, engine_name, device_type)
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)
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charset = utf8mb3
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row_format = DYNAMIC
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stats_persistent = 0;
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