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121 lines
4.1 KiB
Plaintext
121 lines
4.1 KiB
Plaintext
-- { echoOn }
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SELECT value FROM (SELECT tupleElement(value, 'a') AS value FROM test_table);
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0
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EXPLAIN QUERY TREE SELECT value FROM (
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SELECT tupleElement(value, 'a') AS value FROM test_table
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);
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QUERY id: 0
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 1, nodes: 1
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COLUMN id: 2, column_name: value, result_type: UInt64, source_id: 3
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JOIN TREE
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QUERY id: 3, is_subquery: 1
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 4, nodes: 1
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FUNCTION id: 5, function_name: tupleElement, function_type: ordinary, result_type: UInt64
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ARGUMENTS
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LIST id: 6, nodes: 2
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COLUMN id: 7, column_name: value, result_type: Tuple(a UInt64), source_id: 8
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CONSTANT id: 9, constant_value: \'a\', constant_value_type: String
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JOIN TREE
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TABLE id: 8, table_name: default.test_table
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SELECT '--';
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--
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EXPLAIN QUERY TREE SELECT value FROM (
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SELECT tupleElement(value, 'a') AS value FROM test_table
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) SETTINGS optimize_functions_to_subcolumns = 1;
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QUERY id: 0
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 1, nodes: 1
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COLUMN id: 2, column_name: value, result_type: UInt64, source_id: 3
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JOIN TREE
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QUERY id: 3, is_subquery: 1
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 4, nodes: 1
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COLUMN id: 5, column_name: value.a, result_type: UInt64, source_id: 6
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JOIN TREE
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TABLE id: 6, table_name: default.test_table
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SETTINGS optimize_functions_to_subcolumns=1
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SELECT '--';
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--
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EXPLAIN QUERY TREE SELECT value FROM (
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SELECT tupleElement(value, 'a') AS value FROM test_table SETTINGS optimize_functions_to_subcolumns = 0
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) SETTINGS optimize_functions_to_subcolumns = 1;
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QUERY id: 0
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 1, nodes: 1
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COLUMN id: 2, column_name: value, result_type: UInt64, source_id: 3
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JOIN TREE
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QUERY id: 3, is_subquery: 1
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 4, nodes: 1
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FUNCTION id: 5, function_name: tupleElement, function_type: ordinary, result_type: UInt64
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ARGUMENTS
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LIST id: 6, nodes: 2
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COLUMN id: 7, column_name: value, result_type: Tuple(a UInt64), source_id: 8
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CONSTANT id: 9, constant_value: \'a\', constant_value_type: String
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JOIN TREE
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TABLE id: 8, table_name: default.test_table
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SETTINGS optimize_functions_to_subcolumns=0
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SETTINGS optimize_functions_to_subcolumns=1
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SELECT '--';
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--
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EXPLAIN QUERY TREE SELECT value FROM (
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SELECT tupleElement(value, 'a') AS value FROM test_table
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) SETTINGS optimize_functions_to_subcolumns = 0;
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QUERY id: 0
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 1, nodes: 1
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COLUMN id: 2, column_name: value, result_type: UInt64, source_id: 3
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JOIN TREE
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QUERY id: 3, is_subquery: 1
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 4, nodes: 1
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FUNCTION id: 5, function_name: tupleElement, function_type: ordinary, result_type: UInt64
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ARGUMENTS
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LIST id: 6, nodes: 2
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COLUMN id: 7, column_name: value, result_type: Tuple(a UInt64), source_id: 8
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CONSTANT id: 9, constant_value: \'a\', constant_value_type: String
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JOIN TREE
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TABLE id: 8, table_name: default.test_table
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SETTINGS optimize_functions_to_subcolumns=0
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SELECT '--';
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--
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EXPLAIN QUERY TREE SELECT value FROM (
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SELECT tupleElement(value, 'a') AS value FROM test_table SETTINGS optimize_functions_to_subcolumns = 1
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) SETTINGS optimize_functions_to_subcolumns = 0;
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QUERY id: 0
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 1, nodes: 1
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COLUMN id: 2, column_name: value, result_type: UInt64, source_id: 3
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JOIN TREE
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QUERY id: 3, is_subquery: 1
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PROJECTION COLUMNS
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value UInt64
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PROJECTION
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LIST id: 4, nodes: 1
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COLUMN id: 5, column_name: value.a, result_type: UInt64, source_id: 6
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JOIN TREE
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TABLE id: 6, table_name: default.test_table
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SETTINGS optimize_functions_to_subcolumns=1
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SETTINGS optimize_functions_to_subcolumns=0
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