**Describe what's wrong**

Query with rollup using same selected field name as the name of underlying column reports structure mismatch

**Does it reproduce on recent release?**

yes

**How to reproduce**

`21.9.2.17`

```sql
CREATE TABLE test
(
    `d` DateTime,
    `a` LowCardinality(String),
    `b` UInt64
)
ENGINE = MergeTree
PARTITION BY toDate(d)
ORDER BY d;

SELECT *
FROM (
    SELECT
        a,
        max((d, b)).2 AS value
    FROM test
    GROUP BY rollup(a)
)
WHERE a <> '';
```

**Expected behavior**

This used to return an ok result on v21.8

**Error message and/or stacktrace**

> Code: 352. DB::Exception: Block structure mismatch in (columns with identical name must have identical structure) stream: different columns:
> notEquals(a, '') LowCardinality(UInt8) ColumnLowCardinality(size = 0, UInt8(size = 0), ColumnUnique(size = 1, UInt8(size = 1)))
> notEquals(a, '') LowCardinality(UInt8) Const(size = 0, ColumnLowCardinality(size = 1, UInt8(size = 1), ColumnUnique(size = 2, UInt8(size = 2)))). (AMBIGUOUS_COLUMN_NAME) (version 21.9.2.17 (official build))



}
        if (const_filter_description.always_false)
        {
            if (totals_mode == TotalsMode::BEFORE_HAVING)
                addToTotals(chunk, nullptr);
            chunk.clear();
            return;
        }
        FilterDescription filter_description(*filter_column_ptr);
        
        if (totals_mode == TotalsMode::BEFORE_HAVING)
            addToTotals(chunk, nullptr);
        else
            addToTotals(chunk, filter_description.data);
        
        for (auto & column : columns)
        {
            column = column->filter(*filter_description.data, -1);
            if (column->empty())
            {
                chunk.clear();
                return;
            }
        }
        num_rows = columns.front()->size();
        chunk.setColumns(std::move(columns), num_rows);
    }
    passed_keys += chunk.getNumRows();
}
void TotalsHavingTransform::addToTotals(const Chunk & chunk, const IColumn::Filter * filter)