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42 lines
1.6 KiB
SQL
42 lines
1.6 KiB
SQL
DROP TABLE IF EXISTS t_func_to_subcolumns;
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SET optimize_functions_to_subcolumns = 1;
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CREATE TABLE t_func_to_subcolumns (id UInt64, arr Array(UInt64), n Nullable(String), m Map(String, UInt64))
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ENGINE = MergeTree ORDER BY tuple();
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INSERT INTO t_func_to_subcolumns VALUES (1, [1, 2, 3], 'abc', map('foo', 1, 'bar', 2)) (2, [], NULL, map());
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SELECT id IS NULL, n IS NULL, n IS NOT NULL FROM t_func_to_subcolumns;
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EXPLAIN SYNTAX SELECT id IS NULL, n IS NULL, n IS NOT NULL FROM t_func_to_subcolumns;
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SELECT length(arr), empty(arr), notEmpty(arr), empty(n) FROM t_func_to_subcolumns;
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EXPLAIN SYNTAX SELECT length(arr), empty(arr), notEmpty(arr), empty(n) FROM t_func_to_subcolumns;
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SELECT mapKeys(m), mapValues(m) FROM t_func_to_subcolumns;
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EXPLAIN SYNTAX SELECT mapKeys(m), mapValues(m) FROM t_func_to_subcolumns;
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SELECT count(n) FROM t_func_to_subcolumns;
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EXPLAIN SYNTAX SELECT count(n) FROM t_func_to_subcolumns;
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SELECT count(id) FROM t_func_to_subcolumns;
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EXPLAIN SYNTAX SELECT count(id) FROM t_func_to_subcolumns;
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SELECT id, left.n IS NULL, right.n IS NULL FROM t_func_to_subcolumns AS left
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FULL JOIN (SELECT 1 AS id, 'qqq' AS n UNION ALL SELECT 3 AS id, 'www') AS right USING(id);
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EXPLAIN SYNTAX SELECT id, left.n IS NULL, right.n IS NULL FROM t_func_to_subcolumns AS left
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FULL JOIN (SELECT 1 AS id, 'qqq' AS n UNION ALL SELECT 3 AS id, 'www') AS right USING(id);
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DROP TABLE t_func_to_subcolumns;
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DROP TABLE IF EXISTS t_tuple_null;
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CREATE TABLE t_tuple_null (t Tuple(null UInt32)) ENGINE = MergeTree ORDER BY tuple();
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INSERT INTO t_tuple_null VALUES ((10)), ((20));
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SELECT t IS NULL, t.null FROM t_tuple_null;
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DROP TABLE t_tuple_null;
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