v.20.8Performance Improvement
Fail Fast on Exceeding max_rows_to_read Limit in Parts Scan
Fail fast ifmax_rows_to_readlimit is exceeded on parts scan. The motivation behind this change is to skip ranges scan for all selected parts if it is clear thatmax_rows_to_readis already exceeded. The change is quite noticeable for queries over big number of parts. #13677 (Roman Khavronenko).