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https://issues.apache.org/jira/browse/PIG-3367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13872480#comment-13872480
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Daniel Dai commented on PIG-3367:
---------------------------------
Seems the syntax:
{code}
assert a by a0 > 0, 'a cant be negative for reasons';
{code}
does not work, Grunt parser will complain. We will need to use the following
syntax:
{code}
b = assert a by a0 > 0, 'a cant be negative for reasons';
{code}
Is that expected?
> 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
> Fix For: 0.12.0
>
> Attachments: PIG-3367-2.patch, PIG-3367.patch
>
>
> 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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