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https://issues.apache.org/jira/browse/HIVE-132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660848#action_12660848
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Raghotham Murthy commented on HIVE-132:
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The table Information is actually another row with the same schema: column-name
= "Table Information", column-type = <the extended information>,
column-description = null. Without this, its not possible to use the FetchTask
to get to the extended data. I also added an additional empty row (all columns
are null). I could hack it such that that a ':' is printed after "Table
Information" and write out the actual information in another row. But I cant
get rid of the extra tab since I have to print all rows using the same schema.
I think its better to figure out a schema for the extended information rather
than hacking this more to make it look better in unstructured form.
DDLSemanticAnalyzer: when i set the null string to empty string '\N' was being
displayed. So, I set it to space instead. I was not sure what to change to make
empty string work.
> Show table and describe results should be read via FetchTask
> ------------------------------------------------------------
>
> Key: HIVE-132
> URL: https://issues.apache.org/jira/browse/HIVE-132
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Affects Versions: 0.2.0
> Reporter: Raghotham Murthy
> Assignee: Raghotham Murthy
> Priority: Minor
> Fix For: 0.2.0
>
> Attachments: hive-132.1.patch, hive-132.2.patch
>
>
> Right now there is a different code path in the Driver for show
> tables/describe etc. By adding the FetchTask the code paths will be merged.
> In addition, the results of these statements will be readable via JDBC.
> Going forward, we should provide SQL access to our metastore similar to
> access provided by Oracle or mysql to their catalog tables. In this jira, I
> will just add schema information to show tables and describe queries.
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