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24 lines
940 B
SQL
24 lines
940 B
SQL
DROP TABLE IF EXISTS min_max_with_nullable_string;
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SET allow_experimental_data_skipping_indices = 1;
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CREATE TABLE min_max_with_nullable_string (
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t DateTime,
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nullable_str Nullable(String),
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INDEX nullable_str_min_max nullable_str TYPE minmax GRANULARITY 8192
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) ENGINE = MergeTree ORDER BY (t);
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INSERT INTO min_max_with_nullable_string(t) VALUES (now()) (now());
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SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '.';
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INSERT INTO min_max_with_nullable_string(t, nullable_str) VALUES (now(), '.') (now(), '.');
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SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '.';
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INSERT INTO min_max_with_nullable_string(t, nullable_str) VALUES (now(), NULL) (now(), '.') (now(), NULL) (now(), '.') (now(), NULL);
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SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '.';
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SELECT count() FROM min_max_with_nullable_string WHERE nullable_str = '';
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DROP TABLE min_max_with_nullable_string; |