mirror of
https://github.com/ClickHouse/ClickHouse.git
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96 lines
4.0 KiB
SQL
96 lines
4.0 KiB
SQL
SET allow_experimental_analyzer = 1;
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DROP TABLE IF EXISTS test_table;
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CREATE TABLE test_table
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(
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id UInt64,
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value String
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) ENGINE=TinyLog;
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INSERT INTO test_table VALUES (0, 'Value');
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SELECT 'Standalone lambdas';
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WITH x -> x + 1 AS lambda SELECT lambda(1);
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WITH x -> toString(x) AS lambda SELECT lambda(1), lambda(NULL), lambda([1,2,3]);
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WITH x -> toString(x) AS lambda_1, lambda_1 AS lambda_2, lambda_2 AS lambda_3 SELECT lambda_1(1), lambda_2(NULL), lambda_3([1,2,3]);
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WITH x -> x + 1 AS lambda SELECT lambda(id) FROM test_table;
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WITH x -> toString(x) AS lambda SELECT lambda(id), lambda(value) FROM test_table;
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SELECT 'Lambda as function parameter';
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SELECT arrayMap(x -> x + 1, [1,2,3]);
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WITH x -> x + 1 AS lambda SELECT arrayMap(lambda, [1,2,3]);
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SELECT arrayMap((x -> toString(x)) as lambda, [1,2,3]), arrayMap(lambda, ['1','2','3']);
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WITH x -> toString(x) AS lambda_1 SELECT arrayMap(lambda_1 AS lambda_2, [1,2,3]), arrayMap(lambda_2, ['1', '2', '3']);
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SELECT arrayMap(x -> id, [1,2,3]) FROM test_table;
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SELECT arrayMap(x -> x + id, [1,2,3]) FROM test_table;
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SELECT arrayMap((x -> concat(concat(toString(x), '_'), toString(id))) as lambda, [1,2,3]) FROM test_table;
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SELECT 'Lambda compound argument';
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DROP TABLE IF EXISTS test_table_tuple;
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CREATE TABLE test_table_tuple
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(
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id UInt64,
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value Tuple(value_0_level_0 String, value_1_level_0 String)
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) ENGINE=TinyLog;
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INSERT INTO test_table_tuple VALUES (0, ('value_0_level_0', 'value_1_level_0'));
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WITH x -> concat(concat(toString(x.id), '_'), x.value) AS lambda SELECT cast((1, 'Value'), 'Tuple (id UInt64, value String)') AS value, lambda(value);
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WITH x -> concat(concat(x.value_0_level_0, '_'), x.value_1_level_0) AS lambda SELECT lambda(value) FROM test_table_tuple;
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SELECT 'Lambda matcher';
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WITH x -> * AS lambda SELECT lambda(1);
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WITH x -> * AS lambda SELECT lambda(1) FROM test_table;
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WITH cast(tuple(1), 'Tuple (value UInt64)') AS compound_value SELECT arrayMap(x -> compound_value.*, [1,2,3]);
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WITH cast(tuple(1, 1), 'Tuple (value_1 UInt64, value_2 UInt64)') AS compound_value SELECT arrayMap(x -> compound_value.*, [1,2,3]); -- { serverError 1 }
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WITH cast(tuple(1, 1), 'Tuple (value_1 UInt64, value_2 UInt64)') AS compound_value SELECT arrayMap(x -> plus(compound_value.*), [1,2,3]);
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WITH cast(tuple(1), 'Tuple (value UInt64)') AS compound_value SELECT id, test_table.* APPLY x -> compound_value.* FROM test_table;
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WITH cast(tuple(1, 1), 'Tuple (value_1 UInt64, value_2 UInt64)') AS compound_value SELECT id, test_table.* APPLY x -> compound_value.* FROM test_table; -- { serverError 1 }
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WITH cast(tuple(1, 1), 'Tuple (value_1 UInt64, value_2 UInt64)') AS compound_value SELECT id, test_table.* APPLY x -> plus(compound_value.*) FROM test_table;
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SELECT 'Lambda untuple';
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WITH x -> untuple(x) AS lambda SELECT cast((1, 'Value'), 'Tuple (id UInt64, value String)') AS value, lambda(value);
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SELECT 'Lambda carrying';
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WITH (functor, x) -> functor(x) AS lambda, x -> x + 1 AS functor_1, x -> toString(x) AS functor_2 SELECT lambda(functor_1, 1), lambda(functor_2, 1);
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WITH (functor, x) -> functor(x) AS lambda, x -> x + 1 AS functor_1, x -> toString(x) AS functor_2 SELECT lambda(functor_1, id), lambda(functor_2, id) FROM test_table;
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SELECT 'Lambda legacy syntax';
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SELECT arrayMap(lambda(tuple(x), x + 1), [1, 2, 3]);
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WITH 222 AS lambda
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SELECT arrayMap(lambda(tuple(x), x + 1), [1, 2, 3]);
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SELECT arrayMap(lambda((x,), x + 1), [1, 2, 3]);
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SELECT arraySort(lambda((x, y), y), ['world', 'hello'], [2, 1]);
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WITH 222 AS lambda
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SELECT arrayMap(lambda((x, ), x + 1), [1, 2, 3]);
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WITH x -> x + 1 AS lambda
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SELECT arrayMap(lambda(tuple(x), x + 1), [1, 2, 3]), lambda(1);
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-- lambda(tuple(x), x + 1) parsed as lambda definion but not as call of lambda defined in WITH
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WITH (x, y) -> y AS lambda
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SELECT arrayMap(lambda(tuple(x), x + 1), [1, 2, 3]), lambda(tuple(x), x + 1), 1 AS x; -- { serverError BAD_ARGUMENTS }
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WITH (x, y) -> y AS lambda2
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SELECT arrayMap(lambda(tuple(x), x + 1), [1, 2, 3]), lambda2(tuple(x), x + 1), 1 AS x;
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DROP TABLE test_table_tuple;
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DROP TABLE test_table;
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