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https://issues.apache.org/jira/browse/DRILL-4659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15276627#comment-15276627
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Jason Altekruse commented on DRILL-4659:
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This feature was added last fall, I think we may want to duplicate this
information in the section about "Querying Data" to make it easier to find, but
the feature is documented here.
https://drill.apache.org/docs/plugin-configuration-basics/#using-the-formats-attributes-as-table-function-parameters
If you would like to see more examples of usage or information about the
features development this was the JIRA for the feature:
https://issues.apache.org/jira/browse/DRILL-4047
> Specify, as part of the query, table information: data format (CSV, parquet,
> JSON. etc.), field delimiter, etc.
> ---------------------------------------------------------------------------------------------------------------
>
> Key: DRILL-4659
> URL: https://issues.apache.org/jira/browse/DRILL-4659
> Project: Apache Drill
> Issue Type: Improvement
> Components: Query Planning & Optimization, SQL Parser
> Reporter: Roger Dielrton
> Priority: Minor
>
> I have a file, that I would like to use in a query, and it can have one or
> more of the following properties:
> * Has not extension ==> Drill is unable to handle it.
> * I know it contains data in CSV format, but the field separator is a non
> standard character ==> Drill is unable to parse it (without modify the
> storage plugin configuration).
> * Is located in an Amazon S3 bucket ==> I can't rename it.
> * Has a big size ==> It would be expensive to make a copy of it.
> It would be nice if you can specify, as part of the "select" query, as
> metadata, relevant table information as:
> * Data format (CSV, parquet, JSON. etc.)
> * Field delimiter.
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