**How to reproduce**
Clickhouse version 21.2-21.3

```
SELECT x
FROM
(
    SELECT 1 AS x
    UNION DISTINCT
    SELECT 1
)
LIMIT 1

Query id: b82bbb8d-dea9-4f1c-9a2f-5b0e9b6c2422


0 rows in set. Elapsed: 0.002 sec.

Received exception from server (version 21.2.3):
Code: 49. DB::Exception: Received from localhost:9000. DB::Exception: Bad cast from type DB::ASTSelectWithUnionQuery to DB::ASTSelectQuery.
```


{
    const Settings & settings = context->getSettingsRef();
    auto totals_having_step = std::make_unique<TotalsHavingStep>(
            query_plan.getCurrentDataStream(),
            overflow_row, expression,
            has_having ? getSelectQuery().having()->getColumnName() : "",
            settings.totals_mode, settings.totals_auto_threshold, final);
    query_plan.addStep(std::move(totals_having_step));
}
void InterpreterSelectQuery::executeRollupOrCube(QueryPlan & query_plan, Modificator modificator)
{
    const auto & header_before_transform = query_plan.getCurrentDataStream().header;
    ColumnNumbers keys;
    for (const auto & key : query_analyzer->aggregationKeys())
        keys.push_back(header_before_transform.getPositionByName(key.name));
    const Settings & settings = context->getSettingsRef();
    Aggregator::Params params(header_before_transform, keys, query_analyzer->aggregates(),
                              false, settings.max_rows_to_group_by, settings.group_by_overflow_mode, 0, 0,
                              settings.max_bytes_before_external_group_by, settings.empty_result_for_aggregation_by_empty_set,
                              context->getTemporaryVolume(), settings.max_threads, settings.min_free_disk_space_for_temporary_data);
    auto transform_params = std::make_shared<AggregatingTransformParams>(params, true);
    QueryPlanStepPtr step;
    if (modificator == Modificator::ROLLUP)
        step = std::make_unique<RollupStep>(query_plan.getCurrentDataStream(), std::move(transform_params));
    else
        step = std::make_unique<CubeStep>(query_plan.getCurrentDataStream(), std::move(transform_params));
    query_plan.addStep(std::move(step));
}
void InterpreterSelectQuery::executeExpression(QueryPlan & query_plan, const ActionsDAGPtr & expression, const std::string & description)