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

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This commit is contained in:
Alexey Milovidov 2017-12-19 04:13:20 +03:00
parent d9732198ac
commit 4e8a70a29f
1 changed files with 6 additions and 5 deletions
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11
dbms/src/Functions/FunctionsConditional.h
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@ -586,11 +586,12 @@ private:
executeImpl(temporary_block, {0, 1, 2}, 3);
MutableColumnPtr result_column = temporary_block.getByPosition(3).column->mutate();
if (ColumnNullable * result_nullable = typeid_cast<ColumnNullable *>(result_column.get()))
const ColumnPtr & result_column = temporary_block.getByPosition(3).column;
if (checkColumn<ColumnNullable>(result_column.get()))
{
result_nullable->applyNullMap(static_cast<const ColumnNullable &>(*arg_cond.column));
block.getByPosition(result).column = std::move(result_column);
MutableColumnPtr mutable_result_column = result_column->mutate();
static_cast<ColumnNullable &>(*mutable_result_column).applyNullMap(static_cast<const ColumnNullable &>(*arg_cond.column));
block.getByPosition(result).column = std::move(mutable_result_column);
return true;
}
else if (result_column->onlyNull())
@ -601,7 +602,7 @@ private:
else
{
block.getByPosition(result).column = ColumnNullable::create(
materializeColumnIfConst(std::move(result_column)), static_cast<const ColumnNullable &>(*arg_cond.column).getNullMapColumnPtr());
materializeColumnIfConst(result_column), static_cast<const ColumnNullable &>(*arg_cond.column).getNullMapColumnPtr());
return true;
}
}