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From "Bryan Duxbury (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-487) Replace hql w/ a hbase-friendly jirb or jython shell
Date Thu, 03 Apr 2008 03:22:24 GMT

    [ https://issues.apache.org/jira/browse/HBASE-487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12584969#action_12584969
] 

Bryan Duxbury commented on HBASE-487:
-------------------------------------

The license compatibility issue only prevents us from bundling, right? Certainly it'd be nice
to bundle the needed libraries in, but it would add at most one or two more steps to the install
process. Also, if we decide to make a web admin interface in JRuby on Rails, JRuby would already
be around. 

I think we should avoid making a decision solely for license purposes. 

> 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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