| Screen | |
| Project(EXPR$0=[/(CAST($1):INTEGER, CAST($2):FLOAT)]) | |
| Project(row_key=[$0], ITEM=[ITEM($1, 'age')], ITEM2=[ITEM($2, 'gpa')]) | |
| Scan(groupscan=[HBaseGroupScan [HBaseScanSpec=HBaseScanSpec [tableName=student, startRow=10, stopRow=10\x00, filter=null], columns=[`row_key`, `twocf`.`age`, `threecf`.`gpa`]]]) |