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https://issues.apache.org/jira/browse/PIG-2067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13033151#comment-13033151
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Richard Ding commented on PIG-2067:
-----------------------------------
+1
> FilterLogicExpressionSimplifier removed some branches in some cases
> -------------------------------------------------------------------
>
> Key: PIG-2067
> URL: https://issues.apache.org/jira/browse/PIG-2067
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.8.1, 0.9.0
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Fix For: 0.8.1, 0.9.0
>
> Attachments: PIG-2067-1-0.8.patch, PIG-2067-1.patch
>
>
> The following script produce wrong result:
> {code}
> A = load 'a.dat' as (cookie);
> B = load 'b.dat' as (cookie);
> C = cogroup A by cookie, B by cookie;
> E = filter C by COUNT(B)>0 AND COUNT(A)>0;
> explain E;
> {code}
> a.dat:
> 1 1
> 2 2
> 3 3
> 4 4
> 5 5
> 6 6
> 7 7
> b.dat:
> 3 3
> 4 4
> 5 5
> 6 6
> 7 7
> 8 8
> Expected output:
> (3,{(3)},{(3)})
> (4,{(4)},{(4)})
> (5,{(5)},{(5)})
> (6,{(6)},{(6)})
> (7,{(7)},{(7)})
> We get:
> (3,{(3)},{(3)})
> (4,{(4)},{(4)})
> (5,{(5)},{(5)})
> (6,{(6)},{(6)})
> (7,{(7)},{(7)})
> (8,{},{(8)})
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