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https://issues.apache.org/jira/browse/HBASE-487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12587757#action_12587757
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Chris K Wensel commented on HBASE-487:
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Quick thoughts...
Groovy seems polished as a shell and as a base scripting language. Re
scripting, the 'builder' functionality strikes me as a big plus.
Re javascript. I've used it (Rhino/E4X) extensively for scripting. Managing
script 'includes' from shared scripts was very clumsy. E4X was a major plus,
but it is analogous to Groovy 'builder' functionality (but only for XML).
Further, javascript has a rocky roadmap (E4X not avail in jdk, and might be
dropped in JS2, not that it's needed here).
> Replace hql w/ a hbase-friendly jirb or jython shell
> ----------------------------------------------------
>
> Key: HBASE-487
> URL: https://issues.apache.org/jira/browse/HBASE-487
> Project: Hadoop HBase
> Issue Type: Wish
> Reporter: stack
> Assignee: stack
> Priority: Minor
> Attachments: groovy.patch
>
>
> The hbase shell is a useful admin and debugging tool but it has a couple of
> downsides. To extend, a fragile parser definition needs tinkering-with and
> new java classes must be added. The current test suite for hql is lacking
> coverage and the current code could do with a rewrite having evolved
> piecemeal. Another downside is that the presence of an HQL interpreter gives
> the mis-impression that hbase is like a SQL database.
> This 'wish' issue suggests that we jettison HQL and instead offer users a
> jirb or jython command line. We'd ship with some scripts and jruby/jython
> classes that we'd source on startup to do things like import base client
> classes -- so folks wouldn't have to remember all the packages stuff sat in
> -- and added a pretty-print for scanners and getters outputting text, xhtml
> or binary. They would also make it easy to do HQL-things in jruby/python
> script.
> Advantages: Already-written parser with no need of extension probing deeper
> into hbase: i.e. better for debugging than HQL could ever be. Easy extension
> adding scripts/modules rather than java code. Less likely hbase could be
> confused for a SQL db.
> Downsides: Probably more verbose. Requires ruby or python knowledge
> ("Everyone knows some sql"). Big? (jruby lib is 24M).
> I was going to write security as downside but HQL suffers this at the moment
> too -- though it has been possible to sort the updates from the selects in
> the UI to prevent modification of the db from the UI, something that would be
> hard to do in a jruby/jython parser.
> What do others think?
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