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https://issues.apache.org/jira/browse/PIG-3367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13694465#comment-13694465
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Alex Levenson commented on PIG-3367:
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also: adding a keyword means that some scripts will fail (ones that had
relations named assert)
I remember that happening with the "rank" keyword.
What's the big win from having this built into the language opposed to as a
UDF?
The potential to fail fast the entire script instead of letting each task fail
one by one?
Could a UDF (especially a new builtin one like this) have the same ability to
fail fast the whole script?
> Add assert keyword (operator) in pig
> ------------------------------------
>
> Key: PIG-3367
> URL: https://issues.apache.org/jira/browse/PIG-3367
> Project: Pig
> Issue Type: New Feature
> Components: parser
> Reporter: Aniket Mokashi
> Assignee: Aniket Mokashi
>
> Assert operator can be used for data validation. With assert you can write
> script as following-
> {code}
> a = load 'something' as (a0:int, a1:int);
> assert a by a0 > 0, 'a cant be negative for reasons';
> {code}
> This script will fail if assert is violated.
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