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**Describe the bug**

Interval data type is not passed correctly from subquery

**Does it reproduce on recent release?**

Yes, tested on 21.6.5.37.

**How to reproduce**

```sql
SELECT
    toIntervalDay(5) AS interval,
    now() + interval AS res

┌─interval─┬─────────────────res─┐
│        5 │ 2021-07-03 13:11:45 │
└──────────┴─────────────────────┘
```

But if I wrap interval calculation in subquery:

```sql
SELECT
    (SELECT toIntervalDay(5)) AS interval,
    now() + interval AS res

Received exception from server (version 21.6.5):
Code: 70. DB::Exception: Received from localhost:9000. DB::Exception: Conversion from Int8 to IntervalDay is not supported: While processing CAST(5, 'IntervalDay') AS interval, now() + interval AS res.
```

**Expected behavior**

Both queries should work the same way.
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        return ReturnType(true);
    }
};
template <typename FieldType, typename Name>
struct ConvertImpl<DataTypeEnum<FieldType>, DataTypeNumber<FieldType>, Name, ConvertDefaultBehaviorTag>
{
    static ColumnPtr execute(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t )
    {
        return arguments[0].column;
    }
};
static ColumnUInt8::MutablePtr copyNullMap(ColumnPtr col)
{
    ColumnUInt8::MutablePtr null_map = nullptr;
    if (const auto * col_null = checkAndGetColumn<ColumnNullable>(col.get()))
    {
        null_map = ColumnUInt8::create();
        null_map->insertRangeFrom(col_null->getNullMapColumn(), 0, col_null->size());
    }
    return null_map;
}
template <typename FromDataType, typename Name>
requires (!std::is_same_v<FromDataType, DataTypeString>)
struct ConvertImpl<FromDataType, DataTypeString, Name, ConvertDefaultBehaviorTag>
{
    using FromFieldType = typename FromDataType::FieldType;
    using ColVecType = ColumnVectorOrDecimal<FromFieldType>;
    static ColumnPtr execute(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t )