**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))



const ExpressionAnalyzerData & getAnalyzedData() const { return *this; }
    
    const WindowDescriptions & windowDescriptions() const { return window_descriptions; }
    void makeWindowDescriptions(ActionsDAGPtr actions);
    /**
      * Create Set from a subquery or a table expression in the query. The created set is suitable for using the index.
      * The set will not be created if its size hits the limit.
      */
    void tryMakeSetForIndexFromSubquery(const ASTPtr & subquery_or_table_name, const SelectQueryOptions & query_options = {});
    /**
      * Checks if subquery is not a plain StorageSet.
      * Because while making set we will read data from StorageSet which is not allowed.
      * Returns valid SetPtr from StorageSet if the latter is used after IN or nullptr otherwise.
      */
    SetPtr isPlainStorageSetInSubquery(const ASTPtr & subquery_or_table_name);
protected:
    ExpressionAnalyzer(
        const ASTPtr & query_,
        const TreeRewriterResultPtr & syntax_analyzer_result_,
        ContextPtr context_,
        size_t subquery_depth_,
        bool do_global_,
        SubqueriesForSets subqueries_for_sets_,
        PreparedSets prepared_sets_);
    ASTPtr query;
    const ExtractedSettings settings;
    size_t subquery_depth;
    TreeRewriterResultPtr syntax;
    const ConstStoragePtr & storage() const { return syntax->storage; }