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30 lines
1.3 KiB
SQL
30 lines
1.3 KiB
SQL
DROP TABLE IF EXISTS test.pk;
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CREATE TABLE test.pk (d Date DEFAULT '2000-01-01', x DateTime, y UInt64, z UInt64) ENGINE = MergeTree(d, (toStartOfMinute(x), y, z), 1);
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INSERT INTO test.pk (x, y, z) VALUES (1, 11, 1235), (2, 11, 4395), (3, 22, 3545), (4, 22, 6984), (5, 33, 4596), (61, 11, 4563), (62, 11, 4578), (63, 11, 3572), (64, 22, 5786), (65, 22, 5786), (66, 22, 2791), (67, 22, 2791), (121, 33, 2791), (122, 33, 2791), (123, 33, 1235), (124, 44, 4935), (125, 44, 4578), (126, 55, 5786), (127, 55, 2791), (128, 55, 1235);
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SET min_insert_block_size_rows = 0, min_insert_block_size_bytes = 0;
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SET max_block_size = 1;
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-- Test inferred limit
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SET max_rows_to_read = 5;
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SELECT * FROM test.pk WHERE x BETWEEN toDateTime(0) AND toDateTime(59);
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SET max_rows_to_read = 9;
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SELECT * FROM test.pk WHERE x BETWEEN toDateTime(120) AND toDateTime(240);
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-- Index is coarse, cannot read single row
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SET max_rows_to_read = 5;
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SELECT * FROM test.pk WHERE x = toDateTime(1);
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-- Index works on interval 00:01:00 - 00:01:59
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SET max_rows_to_read = 4;
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SELECT * FROM test.pk WHERE x BETWEEN toDateTime(60) AND toDateTime(119) AND y = 11;
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-- Cannot read less rows as PK is coarser on interval 00:01:00 - 00:02:00
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SET max_rows_to_read = 5;
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SELECT * FROM test.pk WHERE x BETWEEN toDateTime(60) AND toDateTime(120) AND y = 11;
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DROP TABLE test.pk;
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