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27 lines
1020 B
SQL
27 lines
1020 B
SQL
DROP TABLE IF EXISTS lwd_merge;
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CREATE TABLE lwd_merge (id UInt64 CODEC(NONE))
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ENGINE = MergeTree ORDER BY id
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SETTINGS max_bytes_to_merge_at_max_space_in_pool = 80000, exclude_deleted_rows_for_part_size_in_merge = 0;
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INSERT INTO lwd_merge SELECT number FROM numbers(10000);
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INSERT INTO lwd_merge SELECT number FROM numbers(10000, 10000);
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OPTIMIZE TABLE lwd_merge;
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SELECT count() FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_merge' AND active = 1;
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DELETE FROM lwd_merge WHERE id % 10 > 0;
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OPTIMIZE TABLE lwd_merge;
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SELECT count() FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_merge' AND active = 1;
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ALTER TABLE lwd_merge MODIFY SETTING exclude_deleted_rows_for_part_size_in_merge = 1;
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-- delete again because deleted rows will be counted in mutation
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DELETE FROM lwd_merge WHERE id % 100 == 0;
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OPTIMIZE TABLE lwd_merge;
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SELECT count() FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_merge' AND active = 1;
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DROP TABLE IF EXISTS lwd_merge;
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