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https://issues.apache.org/jira/browse/SQOOP-495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13291560#comment-13291560
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Vasanth kumar RJ commented on SQOOP-495:
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Hi Bilung Lee,
Thanks for reply. Parameter substitution is going implement on sqoop shell.
I asked like whether can use "set" command itself for setting parameter 
Example:
Sqoop-shell>>set webapp="sqoop-server"

"set" command is already implemented for server and connection properties.
Sqoop-shell>>set server --host hostname 

So I suggested the new "export" command for parameter substitution
Sqoop-shell>>export webapp="sqoop-server"

Kindly suggest if I am wrong.
                
> Support for parameter substitution in the client shell.
> -------------------------------------------------------
>
>                 Key: SQOOP-495
>                 URL: https://issues.apache.org/jira/browse/SQOOP-495
>             Project: Sqoop
>          Issue Type: Task
>            Reporter: Arvind Prabhakar
>            Assignee: Vasanth kumar RJ
>             Fix For: 2.0.0
>
>
> For instance the user could specify set foo = bar, following which every 
> reference to $foo will be replaced with bar.

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