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https://issues.apache.org/jira/browse/DRILL-5851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16330326#comment-16330326
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ASF GitHub Bot commented on DRILL-5851:
---------------------------------------
Github user vdiravka commented on a diff in the pull request:
https://github.com/apache/drill/pull/1059#discussion_r162292084
--- Diff:
exec/java-exec/src/test/java/org/apache/drill/exec/physical/impl/join/TestMergeJoinAdvanced.java
---
@@ -38,13 +37,16 @@
import java.util.Random;
@Category(OperatorTest.class)
-public class TestMergeJoinAdvanced extends BaseTestQuery {
+public class TestMergeJoinAdvanced extends JoinTestBase {
private static final String LEFT = "merge-join-left.json";
private static final String RIGHT = "merge-join-right.json";
+ private static String mjpattern = "MergeJoin";
--- End diff --
Make it as a constant --> private static final String MJ_PATTERN =
"MergeJoin";
> Empty table during a join operation with a non empty table produces cast
> exception
> -----------------------------------------------------------------------------------
>
> Key: DRILL-5851
> URL: https://issues.apache.org/jira/browse/DRILL-5851
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Relational Operators
> Affects Versions: 1.11.0
> Reporter: Hanumath Rao Maduri
> Assignee: Hanumath Rao Maduri
> Priority: Major
> Labels: ready-to-commit
> Fix For: 1.13.0
>
>
> Hash Join operation on tables with one table empty and the other non empty
> throws an exception
> {code}
> 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
> {code}
> Here is an example query with which it is reproducible.
> {code}
> select * from cp.`sample-data/nation.parquet` nation left outer join
> dfs.tmp.`2.csv` as two on two.a = nation.`N_COMMENT`;
> {code}
> the contents of 2.csv is empty (i.e not even header info).
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