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Posted to issues@drill.apache.org by "Chris Westin (JIRA)" <ji...@apache.org> on 2015/04/01 18:30:55 UTC
[jira] [Updated] (DRILL-873) Add an option to fail queries if a
requested column is not found after some threshold
[ https://issues.apache.org/jira/browse/DRILL-873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Westin updated DRILL-873:
-------------------------------
Issue Type: New Feature (was: Improvement)
> Add an option to fail queries if a requested column is not found after some threshold
> -------------------------------------------------------------------------------------
>
> Key: DRILL-873
> URL: https://issues.apache.org/jira/browse/DRILL-873
> Project: Apache Drill
> Issue Type: New Feature
> Components: Metadata
> Reporter: Steven Phillips
> Assignee: Aditya Kishore
> Priority: Minor
> Fix For: 0.9.0
>
>
> An example where this apply is with json, or hbase when selecting a specific column qualifier. For these table formats, there is no way to know whether a particular column exists unless we scan the entire table. So a requested column that does not exist is simply treated as a column of nulls.
> We should allow an option to fail a query if a requested column is not found after reading a configurable number of rows. This option will help avoid the case where a mistyped column name results in a full table scan with unexpected results.
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