mirror of
https://github.com/ClickHouse/ClickHouse.git
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68 lines
2.7 KiB
SQL
68 lines
2.7 KiB
SQL
DROP TABLE IF EXISTS nullable_key;
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DROP TABLE IF EXISTS nullable_key_without_final_mark;
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DROP TABLE IF EXISTS nullable_minmax_index;
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SET max_threads = 1;
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CREATE TABLE nullable_key (k Nullable(int), v int) ENGINE MergeTree ORDER BY k SETTINGS allow_nullable_key = 1, index_granularity = 1;
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INSERT INTO nullable_key SELECT number * 2, number * 3 FROM numbers(10);
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INSERT INTO nullable_key SELECT NULL, -number FROM numbers(3);
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SELECT * FROM nullable_key ORDER BY k;
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SET force_primary_key = 1;
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SET max_rows_to_read = 3;
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SELECT * FROM nullable_key WHERE k IS NULL;
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SET max_rows_to_read = 10;
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SELECT * FROM nullable_key WHERE k IS NOT NULL;
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SET max_rows_to_read = 5;
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SELECT * FROM nullable_key WHERE k > 10;
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SELECT * FROM nullable_key WHERE k < 10;
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OPTIMIZE TABLE nullable_key FINAL;
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SET max_rows_to_read = 4; -- one additional left mark needs to be read
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SELECT * FROM nullable_key WHERE k IS NULL;
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SET max_rows_to_read = 10;
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SELECT * FROM nullable_key WHERE k IS NOT NULL;
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-- Nullable in set and with transform_null_in = 1
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SET max_rows_to_read = 3;
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SELECT * FROM nullable_key WHERE k IN (10, 20) SETTINGS transform_null_in = 1;
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SET max_rows_to_read = 5;
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SELECT * FROM nullable_key WHERE k IN (3, NULL) SETTINGS transform_null_in = 1;
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CREATE TABLE nullable_key_without_final_mark (s Nullable(String)) ENGINE MergeTree ORDER BY s SETTINGS allow_nullable_key = 1, write_final_mark = 0;
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INSERT INTO nullable_key_without_final_mark VALUES ('123'), (NULL);
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SET max_rows_to_read = 0;
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SELECT * FROM nullable_key_without_final_mark WHERE s IS NULL;
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SELECT * FROM nullable_key_without_final_mark WHERE s IS NOT NULL;
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CREATE TABLE nullable_minmax_index (k int, v Nullable(int), INDEX v_minmax v TYPE minmax GRANULARITY 4) ENGINE MergeTree ORDER BY k SETTINGS index_granularity = 1;
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INSERT INTO nullable_minmax_index VALUES (1, 3), (2, 7), (3, 4), (2, NULL); -- [3, +Inf]
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INSERT INTO nullable_minmax_index VALUES (1, 1), (2, 2), (3, 2), (2, 1); -- [1, 2]
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INSERT INTO nullable_minmax_index VALUES (2, NULL), (3, NULL); -- [+Inf, +Inf]
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SET force_primary_key = 0;
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SELECT * FROM nullable_minmax_index ORDER BY k;
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SET max_rows_to_read = 6;
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SELECT * FROM nullable_minmax_index WHERE v IS NULL;
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SET max_rows_to_read = 8;
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SELECT * FROM nullable_minmax_index WHERE v IS NOT NULL;
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SET max_rows_to_read = 6;
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SELECT * FROM nullable_minmax_index WHERE v > 2;
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SET max_rows_to_read = 4;
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SELECT * FROM nullable_minmax_index WHERE v <= 2;
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DROP TABLE nullable_key;
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DROP TABLE nullable_key_without_final_mark;
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DROP TABLE nullable_minmax_index;
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DROP TABLE IF EXISTS xxxx_null;
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CREATE TABLE xxxx_null (`ts` Nullable(DateTime)) ENGINE = MergeTree ORDER BY toStartOfHour(ts) SETTINGS allow_nullable_key = 1;
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INSERT INTO xxxx_null SELECT '2021-11-11 00:00:00';
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SELECT * FROM xxxx_null WHERE ts > '2021-10-11 00:00:00';
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DROP TABLE xxxx_null;
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