mirror of
https://github.com/ClickHouse/ClickHouse.git
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47 lines
1.9 KiB
Plaintext
47 lines
1.9 KiB
Plaintext
-- { echoOn }
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EXPLAIN header = 1, optimize = 0 SELECT avgWeighted(x, y) FROM (SELECT NULL, 255 AS x, 1 AS y UNION ALL SELECT y, NULL AS x, 1 AS y);
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Expression (Project names)
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Header: avgWeighted(x, y) Nullable(Float64)
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Expression (Projection)
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Header: avgWeighted(__table1.x, __table1.y) Nullable(Float64)
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Aggregating
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Header: avgWeighted(__table1.x, __table1.y) Nullable(Float64)
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Expression (Before GROUP BY)
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Header: __table1.x Nullable(UInt8)
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__table1.y UInt8
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Expression (Change column names to column identifiers)
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Header: __table1.x Nullable(UInt8)
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__table1.y UInt8
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Union
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Header: x Nullable(UInt8)
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y UInt8
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Expression (Conversion before UNION)
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Header: x Nullable(UInt8)
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y UInt8
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Expression (Project names)
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Header: x UInt8
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y UInt8
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Expression (Projection)
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Header: 255_UInt8 UInt8
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1_UInt8 UInt8
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Expression (Change column names to column identifiers)
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Header: __table3.dummy UInt8
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ReadFromStorage (SystemOne)
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Header: dummy UInt8
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Expression (Conversion before UNION)
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Header: x Nullable(UInt8)
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y UInt8
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Expression (Project names)
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Header: x Nullable(Nothing)
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y UInt8
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Expression (Projection)
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Header: _CAST(NULL_Nullable(Nothing), \'Nullable(Nothing)\'_String) Nullable(Nothing)
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1_UInt8 UInt8
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Expression (Change column names to column identifiers)
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Header: __table5.dummy UInt8
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ReadFromStorage (SystemOne)
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Header: dummy UInt8
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SELECT avgWeighted(x, y) FROM (SELECT NULL, 255 AS x, 1 AS y UNION ALL SELECT y, NULL AS x, 1 AS y);
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255
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