**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))



{
            /** For distributed query processing,
              *  if no GROUP, HAVING set,
              *  but there is an ORDER or LIMIT,
              *  then we will perform the preliminary sorting and LIMIT on the remote server.
              */
            if (!expressions.second_stage
                && !expressions.need_aggregate
                && !expressions.hasHaving()
                && !expressions.has_window)
            {
                if (expressions.has_order_by)
                    executeOrder(
                        query_plan,
                        query_info.input_order_info ? query_info.input_order_info
                                                    : (query_info.projection ? query_info.projection->input_order_info : nullptr));
                if (expressions.has_order_by && query.limitLength())
                    executeDistinct(query_plan, false, expressions.selected_columns, true);
                if (expressions.hasLimitBy())
                {
                    executeExpression(query_plan, expressions.before_limit_by, "Before LIMIT BY");
                    executeLimitBy(query_plan);
                }
                if (query.limitLength())
                    executePreLimit(query_plan, true);
            }
        };
        if (intermediate_stage)
        {
            if (expressions.first_stage || expressions.second_stage)