drill-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aditya Kishore (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-836) Drill needs to return complex types (e.g., map and array) as a JSON string
Date Fri, 13 Jun 2014 11:05:02 GMT

     [ https://issues.apache.org/jira/browse/DRILL-836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aditya Kishore updated DRILL-836:

    Attachment: DRILL-836-Drill-needs-to-return-complex-types-e.g.-m.patch

> Drill needs to return complex types (e.g., map and array) as a JSON string
> --------------------------------------------------------------------------
>                 Key: DRILL-836
>                 URL: https://issues.apache.org/jira/browse/DRILL-836
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Operators, Execution - RPC
>    Affects Versions: 1.0.0-BETA1
>            Reporter: George Chow
>            Assignee: Aditya Kishore
>            Priority: Blocker
>             Fix For: 1.0.0-BETA1
>         Attachments: DRILL-836-Drill-needs-to-return-complex-types-e.g.-m.patch
> Drill needs to help users understand the available columns in a given HBase table's column-family.
One way to do this is to implement the DESCRIBE command for a column-family. The purpose of
this is to let Drill do the column sampling. The mandatory LIMIT clause specifies the sample
size so as to throttle the number of columns returned.
> ==
> Instead of the above narrow proposal, a general mechanism to return complex types in
a JSON string so as to allow client tools (such as the ODBC driver) to operate on these complex
> Returning a map as JSON would provide transparency into HBase column-families and allow
the ODBC driver to help surface the names of columns within a column-family.
> Returning an array as JSON would provide transparency into CSV files since that conveys
the number of columns to the ODBC driver.

This message was sent by Atlassian JIRA

View raw message