```
/4/ :) SELECT arrayJoin([1, 2])  GROUP BY 1 WITH TOTALS FORMAT JSON

{
	"meta":
	[
		{
			"name": "arrayJoin([1, 2])",
			"type": "UInt8"
		}
	],

	"data":
	[
		{
			"arrayJoin([1, 2])": 1
		},
		{
			"arrayJoin([1, 2])": 2
		}← Progress: 0.00 rows, 0.00 B (0.00 rows/s., 0.00 B/s.) Logical error: 'Got 2 in totals chunk, expected 1'.
clickhouse-client: /home/akuzm/ch4/ch/src/Common/Exception.cpp:45: DB::Exception::Exception(const std::string &, int): Assertion `false' failed.
Aborted (core dumped)
```


{
    if (finished_transform)
        prepareTotals();
    else
        ISimpleTransform::work();
}
void TotalsHavingTransform::transform(Chunk & chunk)
{
    
    if (overflow_row)
    {
        const auto & info = chunk.getChunkInfo();
        if (!info)
            throw Exception("Chunk info was not set for chunk in TotalsHavingTransform.", ErrorCodes::LOGICAL_ERROR);
        const auto * agg_info = typeid_cast<const AggregatedChunkInfo *>(info.get());
        if (!agg_info)
            throw Exception("Chunk should have AggregatedChunkInfo in TotalsHavingTransform.", ErrorCodes::LOGICAL_ERROR);
        if (agg_info->is_overflows)
        {