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https://issues.apache.org/jira/browse/PIG-442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12633026#action_12633026
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Olga Natkovich commented on PIG-442:
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Santhosh, do we have unit tests for both 442 and 436?
> Disambiguated alias after a foreach flatten is not accessible a couple of
> statements after the foreach
> ------------------------------------------------------------------------------------------------------
>
> Key: PIG-442
> URL: https://issues.apache.org/jira/browse/PIG-442
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Santhosh Srinivasan
> Assignee: Santhosh Srinivasan
> Fix For: types_branch
>
> Attachments: PIG-442.patch
>
>
> In statements following a foreach which flattens its cogrouped inputs,
> unambiguous column names are not accessible via the :: specifier. A
> reproducible case is given below:
> {code}
> grunt> a = load 'one' as (name, age, gpa);
> grunt> b = load 'two' as (name, age, height);
> grunt> c = cogroup a by name, b by name;
> grunt> d = foreach c generate flatten(a), flatten(b);
> grunt> e = group d by height;
> grunt> f = foreach e generate group, COUNT(d.a::height);
> 114501 [main] ERROR org.apache.pig.tools.grunt.GruntParser -
> java.io.IOException: Invalid alias: a::height in {a::name: bytearray,a::age:
> bytearray,gpa: bytearray,b::name: bytearray,b::age: bytearray,height:
> bytearray}
> at org.apache.pig.PigServer.parseQuery(PigServer.java:293)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:258)
> at
> org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:432)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:242)
> {code}
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