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https://issues.apache.org/jira/browse/PIG-3782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13931818#comment-13931818
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Koji Noguchi commented on PIG-3782:
-----------------------------------
bq. The uid field of mUserDefinedSchema is considered dummy. The reason I
upload a different patch is I am not sure if there is any side effect for
caching uid in mUserDefinedSchema.
Thanks [~daijy] for the explanation. I'm +1 on your patch. (unit&e2e tests
were fine.)
But can you add some comment in LOGenerate.java so that it's clear
mUserDefinedSchema shouldn't store any UIDs and the reasons behind it?
> PushDownForEachFlatten + ColumnMapKeyPrune with user defined schema failing
> due to incorrect UID assignment
> -----------------------------------------------------------------------------------------------------------
>
> Key: PIG-3782
> URL: https://issues.apache.org/jira/browse/PIG-3782
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.10.1, 0.12.0, 0.11.1
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Attachments: PIG-3782-2.patch, pig-3782-v01.patch
>
>
> {noformat}
> a = load '1.txt' as (a0:int, a1, a2:bag{});
> b = load '2.txt' as (b0:int, b1);
> c = foreach a generate a0, flatten(a2) as (q1, q2);
> d = join c by a0, b by b0;
> e = foreach d generate a0, q1, q2;
> f = foreach e generate a0, (int)q1, (int)q2;
> store f into 'output';
> {noformat}
> This pig script fails with
> 2014-02-27 11:49:45,657 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 2229: Couldn't find matching uid -1 for project (Name: Project Type:
> bytearray Uid: 13 Input: 0 Column: 1)
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