[DRILL-5185] Union all not passing type info when the output contains 0 rows

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.10.0
• Fix Version/s: 1.12.0
• Component/s: Execution - Relational Operators, Query Planning & Optimization
• Assignee: Jinfeng Ni
• Reporter: Rahul Kumar Challapalli
• Created: 09/Jan/17 22:04
• Updated: 05/Sep/17 22:22
• Resolved: 05/Sep/17 22:22

Description

Version : 1.10.0
git.commit.id.abbrev=4d4e0c2

The below query fails without an explicit cast

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)

Issue Links

• is related to: DRILL-5546 Schema change problems caused by empty batch
• relates to: DRILL-5327 Hash aggregate can return empty batch which can cause schema change exception