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https://issues.apache.org/jira/browse/DRILL-5851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16334789#comment-16334789
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ASF GitHub Bot commented on DRILL-5851:
---------------------------------------
Github user Ben-Zvi commented on a diff in the pull request:
https://github.com/apache/drill/pull/1059#discussion_r163045737
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinProbeTemplate.java
---
@@ -136,7 +136,9 @@ public void executeProbePhase() throws
SchemaChangeException {
case OK_NEW_SCHEMA:
if (probeBatch.getSchema().equals(probeSchema)) {
doSetup(outgoingJoinBatch.getContext(), buildBatch,
probeBatch, outgoingJoinBatch);
- hashTable.updateBatches();
+ if (hashTable != null) {
+ hashTable.updateBatches();
+ }
--- End diff --
Fine.
> 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
> 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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