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https://issues.apache.org/jira/browse/PIG-5350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16581442#comment-16581442
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Igor Yagolnitser commented on PIG-5350:
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[~knoguchi] thanks for following up.
I don't have access to pig-0.17 or trunk.
Here's a more fleshed out version of the script:
(you will need to create start with any dataset of any schema with just one
record in it)
{code:java}
a = FOREACH temp GENERATE 'a' as myField, {(1,1), (2,2)} as
myBag:{myTouple:(myField1:int, myField2:int)};
b = FOREACH temp GENERATE 'b' as myField, {(1,1), (2,2)} as
myBag:{myTouple:(myField1:int, myField2:int)};
c = UNION a,b;
d = FOREACH c {
e = FILTER myBag BY myField1 == 1;
GENERATE myField, FLATTEN(e);
}
{code}
> Union of two sets with the same schema ends up with uid set to -1
> -----------------------------------------------------------------
>
> Key: PIG-5350
> URL: https://issues.apache.org/jira/browse/PIG-5350
> Project: Pig
> Issue Type: Bug
> Environment: Pig 15
> Reporter: Igor Yagolnitser
> Priority: Major
>
> LOAD a ...
> LOAD b ...
> c = UNION a, b;
> d = FOREACH c {
> e = FILTER d ...
> GENERATE filed1, field2, FLATTEN(e.field3);
> }
> I get an error: ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2271: Logical
> plan invalid state: invalid uid -1 in schema :
> field_foo#-1:tuple(field_bar#-1:double,...
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