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https://issues.apache.org/jira/browse/HBASE-487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12599390#action_12599390
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Bryan Duxbury commented on HBASE-487:
-------------------------------------
Ok, I finally found 15 minutes in which to write the dsl spec I've been
promising. Here it is!
{code}
--General--
help
Get a list of all possible commands
help [cmd]
Get deeper help on a specific command
--Admin--
list
List all the currently existing tables (and their status?)
create name, colfam_spec [, colfam_spec ...], [table_opts]
Create a table.
drop name
Delete a table
alter name [, colfam_spec ...] [, table_opts]
Change an existing table's options or column families
enable name
Enable a table
disable name
Disable a table
truncate name
Drop and recreate a table, effectively emptying it.
--DML--
get table_name, row_key [, "column_name" ...]
Return data from a row
put table_name, row_key [, timestamp], "column_name" => "new value", ...
Put some data to a row at the specific cells, optionally with a timestamp
scan table_name, start_key, end_key [, timestamp] [, "column_name" ...]
Perform a scan over the table from start_key to end_key optionally with a
timestamp or specified columns.
delete table_name, row_key, [, timestamp], "column_name", ...
Delete the data at the cells provided for a given row
{code}
> 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
> Fix For: 0.2.0
>
> Attachments: groovy-2.patch, groovy.patch, jruby.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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