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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-704) Interactive mode doesn't list defined aliases
Date Tue, 10 Mar 2009 21:53:50 GMT

    [ https://issues.apache.org/jira/browse/PIG-704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680635#action_12680635

Alan Gates commented on PIG-704:

A comment on the general approach.  I'm wondering if it would be better to tie this into the
auto-complete functionality in grunt so that it could auto-complete alias.

If that isn't feasible, I'm fine with having an aliases keyword to show current aliases. 
I don't like using '_' to mean something.  Shortcuts should have mnemonic value; underscore
doesn't mean last alias to me.

> Interactive mode doesn't list defined aliases
> ---------------------------------------------
>                 Key: PIG-704
>                 URL: https://issues.apache.org/jira/browse/PIG-704
>             Project: Pig
>          Issue Type: Improvement
>          Components: grunt
>            Reporter: Eric Gaudet
>            Priority: Trivial
>         Attachments: aliases_last.patch
> I'm using the interactive mode to test my scripts, and I'm struggling to keep track of
2 things:
> 1) the aliases. A typical test script has 10 aliases or more. As the test goes on, different
versions are created, or aliases are created with typos. There's no command in grunt to get
the list of defined aliases. Proposed solution: add a new command "aliases" that prints the
list of aliases.
> 2) I prefer to give meaningful (long) names to my aliases. But as I try different things,
I find it hard to predict what the schema will look like, so I use DESCRIBE a lot. It's a
pain to type these long names all the time, especially since most of the time I only want
to describe the last alias created. A shortcut to the describe command describing the last
alias will be very useful. Proposed solution: use the special name "_" as a shortcut to the
last created alias: DECRIBE _.

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