Krystal created DRILL-4475:
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Summary: Joins containing join key between varbinary and
non-varbinary fails
Key: DRILL-4475
URL: https://issues.apache.org/jira/browse/DRILL-4475
Project: Apache Drill
Issue Type: Bug
Components: Query Planning & Optimization
Affects Versions: 1.5.0
Reporter: Krystal
Assignee: Sean Hsuan-Yi Chu
Join queries that contain one join key as varbinary and the other join key as a
non-varbinary such as varchar fails. For example:
select s.name, s.age, s.gpa, v.registration from student_csv_v s inner join
voter_csv_v v on (s.name = v.name);
Error: VALIDATION ERROR: From line 1, column 95 to line 1, column 109: Cannot
apply '=' to arguments of type '<VARBINARY(1)> = <CHAR(30)>'. Supported
form(s): '<COMPARABLE_TYPE> = <COMPARABLE_TYPE>'
s.name is a varbinary and v.name is char(30). Drill should implicitly cast the
join keys to varchar at planning time.
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