```
SELECT version()
─version()─┐
│ 21.8.5.7  │
└───────────┘
```
We have a request, as a result of which we get an array.
When getting an item using a computed value, there is no value
```
SELECT
    arrayMap(x -> x, [[1], [2], [3]]) AS x,
    toTypeName(x),
    x[3 - 2] AS y,
    x[toInt64(1)] AS yy,
    x[toUInt8(1)] AS yyy

┌─x─────────────┬─toTypeName(arrayMap(lambda(tuple(x), x), [[1], [2], [3]]))─┬─y──┬─yy─┬─yyy─┐
│ [[1],[2],[3]] │ Array(Array(UInt8))                                        │ [] │ [] │ [1] │
└───────────────┴────────────────────────────────────────────────────────────┴────┴────┴─────┘
```
However, when the array is explicitly specified, the value is present.
The types are the same.
```
SELECT
    [[1], [2], [3]] AS x,
    toTypeName(x),
    x[3 - 2] AS y,
    x[toInt64(1)] AS yy,
    x[toInt8(1)] AS yyy

┌─x─────────────┬─toTypeName([[1], [2], [3]])─┬─y───┬─yy──┬─yyy─┐
│ [[1],[2],[3]] │ Array(Array(UInt8))         │ [1] │ [1] │ [1] │
└───────────────┴─────────────────────────────┴─────┴─────┴─────┘
```


{
        auto data_ref = data.getDataAt(row_data);
        return index.size() == data_ref.size && memcmp(index.data(), data_ref.data, data_ref.size) == 0;
    }
};
template <typename DataType, typename IndexType>
struct MatcherNumber
{
    const PaddedPODArray<DataType> & data;
    const PaddedPODArray<IndexType> & index;
    bool match(size_t row_data, size_t row_index) const
    {
        return data[row_data] == static_cast<DataType>(index[row_index]);
    }
};
template <typename DataType>
struct MatcherNumberConst
{
    const PaddedPODArray<DataType> & data;
    DataType index;
    bool match(size_t row_data, size_t ) const