v.20.9Bug Fix
Fix for Virtual Column Query Issues in ClickHouse
Fix some cases of queries, in which only virtual columns are selected. Previously Not found column _nothing in block exception may be thrown. Fixes #12298. #15756 (Anton Popov).Fix some cases of queries, in which only virtual columns are selected. Previously Not found column _nothing in block exception may be thrown. Fixes #12298. #15756 (Anton Popov).