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https://issues.apache.org/jira/browse/DRILL-4120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16382240#comment-16382240
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ASF GitHub Bot commented on DRILL-4120:
---------------------------------------
Github user paul-rogers commented on the issue:
https://github.com/apache/drill/pull/1138
As @arina-ielchiieva points out, this change backs out plan-time knowledge
of schema. This may not affect run-time accuracy. However, it does mean that
queries can be planned, based on not knowing types, that fail at runtime when
types are learned. This seems more like a bug that a feature. In general, we
should use all information available. It is not helpful to ignore information
if doing so results in poorer user experience.
> dir0 does not work when the directory structure contains Avro files
> -------------------------------------------------------------------
>
> Key: DRILL-4120
> URL: https://issues.apache.org/jira/browse/DRILL-4120
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.3.0
> Reporter: Stefán Baxter
> Assignee: Volodymyr Vysotskyi
> Priority: Major
> Fix For: 1.13.0
>
> Attachments:
> 0001-DRILL-4120-Support-reading-directories-having-avro-f.patch
>
>
> Any select statment containing dirN fails if the target directory structure
> contains Avro files.
> Steps to test:
> 1. create a simple directory structure
> 2. copy an avro file into each directory
> 3. execute a query containing dir0
> outcome:
> Error: VALIDATION ERROR: From line 1, column 117 to line 1, column 120:
> Column 'dir0' not found in any table
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