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sumIf(Nullable()) and similar unary functions (unary w/o If combinator) was working incorrectly, since it returns "sum" from the getName() helper, and so distributed query processing fails. The problem is in the optimization in AggregateFunctionIfNullUnary::add() for the unary functions. It pass only one column to write result to, instead of all passed arguments + result columns. While AggregateFunctionIf::add() assumes that it accepts arguments + result columns, and use last column as a result. Introduced-in: #16610 Fixes: #18210
8 lines
706 B
SQL
8 lines
706 B
SQL
SELECT sumIf(dummy, dummy) FROM remote('127.0.0.{1,2}', view(SELECT cast(Null AS Nullable(UInt8)) AS dummy FROM system.one));
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SELECT sumIf(dummy, 1) FROM remote('127.0.0.{1,2}', view(SELECT cast(Null AS Nullable(UInt8)) AS dummy FROM system.one));
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-- Before #16610 it returns 0 while with this patch it will return NULL
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SELECT sumIf(dummy, dummy) FROM remote('127.0.0.{1,2}', view(SELECT cast(dummy AS Nullable(UInt8)) AS dummy FROM system.one));
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SELECT sumIf(dummy, 1) FROM remote('127.0.0.{1,2}', view(SELECT cast(dummy AS Nullable(UInt8)) AS dummy FROM system.one));
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SELECT sumIf(n, 1) FROM remote('127.0.0.{1,2}', view(SELECT cast(* AS Nullable(UInt8)) AS n FROM system.numbers limit 10))
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