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https://issues.apache.org/jira/browse/DRILL-3508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16711710#comment-16711710
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Vitalii Diravka commented on DRILL-3508:
----------------------------------------
It was solved in scope of DRILL-5546 and -DRILL-4185.
{code:java}
0: jdbc:drill:zk=local> use dfs.tmp;
+-------+--------------------------------------+
| ok | summary |
+-------+--------------------------------------+
| true | Default schema changed to [dfs.tmp] |
+-------+--------------------------------------+
1 row selected (0.099 seconds)
0: jdbc:drill:zk=local> select * from `emptyfolder`;
+--+
| |
+--+
+--+
No rows selected (1.75 seconds)
{code}
Starting form Drill 1.13 the empty directory is a Drill schemaless table, see
more:
[https://drill.apache.org/docs/data-sources-and-file-formats-introduction/#schemaless-tables]
> IOOB raised if FROM points at an empty directory
> ------------------------------------------------
>
> Key: DRILL-3508
> URL: https://issues.apache.org/jira/browse/DRILL-3508
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.1.0
> Reporter: Stefán Baxter
> Priority: Major
> Fix For: Future
>
>
> I union select where the right hand side points to an empty directory files
> with the following error code:
> Error: PARSE ERROR: Index: 0, Size: 0
> [Error Id: fed7527a-9d7a-4980-80f5-ff3f0b92d49b on localhost:31010]
> (state=,code=0)
> We use this to merge tenant based information and sometimes there are no
> files on the right hand side of the union. It would be ideal that that
> scenario would return an empty list rather than an error.
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