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