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85 lines
3.3 KiB
SQL
85 lines
3.3 KiB
SQL
DROP TABLE IF EXISTS lwd_test;
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CREATE TABLE lwd_test (id UInt64 , value String) ENGINE MergeTree() ORDER BY id;
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INSERT INTO lwd_test SELECT number, randomString(10) FROM system.numbers LIMIT 1000000;
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SET mutations_sync = 1;
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SET allow_experimental_lightweight_delete_with_row_exists = 1;
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SET allow_experimental_lightweight_delete = 0;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Delete 100K rows using lightweight DELETE';
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--ALTER TABLE lwd_test UPDATE _row_exists = 0 WHERE id < 3000000;
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DELETE FROM lwd_test WHERE id < 100000;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Force merge to cleanup deleted rows';
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OPTIMIZE TABLE lwd_test FINAL;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Delete 100K more rows using lightweight DELETE';
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DELETE FROM lwd_test WHERE id < 200000;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Do UPDATE mutation';
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ALTER TABLE lwd_test UPDATE value = 'v' WHERE id % 2 == 0;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Force merge to cleanup deleted rows';
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OPTIMIZE TABLE lwd_test FINAL;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Delete 100K more rows using lightweight DELETE';
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DELETE FROM lwd_test WHERE id < 300000;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Do ALTER DELETE mutation that does a "heavyweight" delete';
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ALTER TABLE lwd_test DELETE WHERE id % 3 == 0;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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SELECT 'Delete 100K more rows using lightweight DELETE';
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DELETE FROM lwd_test WHERE id >= 300000 and id < 400000;
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SELECT 'Force merge to cleanup deleted rows';
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OPTIMIZE TABLE lwd_test FINAL;
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SELECT 'Rows in parts', SUM(rows) FROM system.parts WHERE database = currentDatabase() AND table = 'lwd_test' AND active;
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SELECT 'Count', count() FROM lwd_test;
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SELECT 'First row', id, length(value) FROM lwd_test ORDER BY id LIMIT 1;
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DROP TABLE lwd_test;
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