### table schema
CREATE TABLE `t1` (
`k1` int(11) NULL,
`v1` int(11) NULL
) ENGINE=OLAP
DUPLICATE KEY(`k1`, `v1`)
COMMENT 'OLAP'
DISTRIBUTED BY HASH(`k1`)
BUCKETS 3
PROPERTIES('replication_num'='1')
### query
select k1,count(distinct v1+1) from t1 group by k1;
### error
java.lang.ClassCastException: org.apache.doris.planner.OlapScanNode cannot be cast to org.apache.doris.planner.AggregationNode