Hi Jingtang, The problem is real, and the fix LGTM.
> Passing the flag there seems to require extending the table scan > interface Actually, no extension is needed: table_beginscan_common() already accepts user_flags, so heapam_index_build_range_scan() can simply call it directly and pass SO_MAINTENANCE. BRIN's summarize_range() also goes through heapam_index_build_range_scan(), so fixing the serial path would switch it over. IMO, that counts as maintenance too. Best regards, Yuhang Qiu
