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28 lines
1.0 KiB
MySQL
28 lines
1.0 KiB
MySQL
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-- { echo }
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DROP TABLE IF EXISTS in_memory;
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CREATE TABLE in_memory (a UInt32) ENGINE = MergeTree ORDER BY a SETTINGS min_rows_for_compact_part = 1000, min_bytes_for_wide_part = 10485760;
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INSERT INTO in_memory VALUES (1);
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INSERT INTO in_memory VALUES (2);
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SELECT name, active, part_type FROM system.parts WHERE database = currentDatabase() AND table = 'in_memory';
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SELECT * FROM in_memory ORDER BY a;
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-- no WAL remove since parts are still in use
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DETACH TABLE in_memory;
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ATTACH TABLE in_memory;
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SELECT name, active, part_type FROM system.parts WHERE database = currentDatabase() AND table = 'in_memory';
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SELECT * FROM in_memory ORDER BY a;
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-- WAL should be removed, since on disk part covers all parts in WAL
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OPTIMIZE TABLE in_memory;
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DETACH TABLE in_memory;
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ATTACH TABLE in_memory;
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SELECT name, active, part_type FROM system.parts WHERE database = currentDatabase() AND table = 'in_memory';
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-- check that the WAL will be reinitialized after remove
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INSERT INTO in_memory VALUES (3);
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DETACH TABLE in_memory;
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ATTACH TABLE in_memory;
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SELECT * FROM in_memory ORDER BY a;
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