**Describe the issue**
```
SELECT xyz

Query id: 0c7d8017-4686-404c-9991-388d9a693e5f


0 rows in set. Elapsed: 0.003 sec. 

Received exception from server (version 21.2.1):
Code: 47. DB::Exception: Received from localhost:9000. DB::Exception: Missing columns: 'xyz' while processing query: 'SELECT xyz', required columns: 'xyz', maybe you meant: .
```

The fragment `maybe you meant: .` should not be present.
ASTs new_elements;
    new_elements.reserve(elements.size());
    for (const auto & elem : elements)
    {
        String name = elem->getAliasOrColumnName();
        auto it = required_columns_with_duplicate_count.find(name);
        if (required_columns_with_duplicate_count.end() != it && it->second)
        {
            new_elements.push_back(elem);
            --it->second;
        }
        else if (select_query->distinct || hasArrayJoin(elem))
        {
            new_elements.push_back(elem);
        }
        else
        {
            ASTFunction * func = elem->as<ASTFunction>();
            if (func && func->name == "untuple")
                for (const auto & col : required_result_columns)
                    if (col.rfind("_ut_", 0) == 0)
                    {
                        new_elements.push_back(elem);
                        break;
                    }
        }
    }
    elements = std::move(new_elements);
}
void executeScalarSubqueries(ASTPtr & query, const Context & context, size_t subquery_depth, Scalars & scalars, bool only_analyze)