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Jinfeng Ni commented on DRILL-5185: ----------------------------------- The root cause of DRILL-5185 is same as the cause of DRILL-5327, where Union All operator injects Nullable-INT typed columns when both incoming batches contain 0 rows. This also was exposed in a new unit test added in the PR of DRILL-5459, using the extended physical operator test framework. > Union all not passing type info when the output contains 0 rows > --------------------------------------------------------------- > > Key: DRILL-5185 > URL: https://issues.apache.org/jira/browse/DRILL-5185 > Project: Apache Drill > Issue Type: Bug > Components: Execution - Relational Operators, Query Planning & > Optimization > Affects Versions: 1.10.0 > Reporter: Rahul Challapalli > Assignee: Jinfeng Ni > > Version : 1.10.0 > git.commit.id.abbrev=4d4e0c2 > The below query fails without an explicit cast > {code} > 0: jdbc:drill:zk=10.10.100.190:5181> select t1.l_partkey, t2.o_orderdate from > ( > . . . . . . . . . . . . . . . . . .> select l_orderkey, l_partkey, l_comment > from cp.`tpch/lineitem.parquet` where l_quantity is null > . . . . . . . . . . . . . . . . . .> union > . . . . . . . . . . . . . . . . . .> select l_orderkey, l_partkey, l_comment > from cp.`tpch/lineitem.parquet` where l_quantity is null > . . . . . . . . . . . . . . . . . .> ) as t1, > . . . . . . . . . . . . . . . . . .> cp.`tpch/orders.parquet` as t2 > . . . . . . . . . . . . . . . . . .> where t1.l_comment = t2.o_comment; > Error: SYSTEM ERROR: DrillRuntimeException: Join only supports implicit casts > between 1. Numeric data > 2. Varchar, Varbinary data 3. Date, Timestamp data Left type: VARCHAR, Right > type: INT. Add explicit casts to avoid this error > Fragment 0:0 > [Error Id: e09bb8ee-cb1c-48bc-9dce-42ace2d4b80b on qa-node190.qa.lab:31010] > (state=,code=0) > {code} -- This message was sent by Atlassian JIRA (v6.3.15#6346)