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https://issues.apache.org/jira/browse/DRILL-836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14014468#comment-14014468
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George Chow commented on DRILL-836:
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>From the discussion on May 28th, I will revise this JIRA to instead have
>complex types (such as map or array) be returned as a JSON string to allow
>ODBC callers to operate on the aggregate.
> Implement "DESCRIBE hbase.table.column-family LIMIT n"
> ------------------------------------------------------
>
> Key: DRILL-836
> URL: https://issues.apache.org/jira/browse/DRILL-836
> Project: Apache Drill
> Issue Type: Bug
> Reporter: George Chow
>
> 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.
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