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Better semantic of sharing columns: development [#CLICKHOUSE-2].

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This commit is contained in:
Alexey Milovidov 2017-12-16 09:33:54 +03:00
parent 62f7c25522
commit 5f4a536f75
1 changed files with 3 additions and 4 deletions
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7
dbms/src/DataStreams/ColumnGathererStream.cpp
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@ -88,10 +88,9 @@ Block ColumnGathererStream::readImpl()
if (!source_to_fully_copy && row_sources_buf.eof())
return Block();
MutableColumns output_columns(1);
output_columns[0] = column.column->cloneEmpty();
output_columns[0]->gather(*this);
return output_block.cloneWithColumns(std::move(output_columns));
MutableColumnPtr output_column = column.column->cloneEmpty();
output_column->gather(*this);
return { ColumnWithTypeAndName(std::move(output_column), column.type, column.name) };
}