Haishan Liu created PIG-4646:
--------------------------------
Summary: PushUpFilter should not push before nested projection
with FILTER operators
Key: PIG-4646
URL: https://issues.apache.org/jira/browse/PIG-4646
Project: Pig
Issue Type: Bug
Affects Versions: 0.11.1
Reporter: Haishan Liu
Verified the problem in 0.11.1. In short, filter should not be pushed before a
nested foreach in which another filter operator is present. See the following
minimum example:
{code}
cat data;
(1, {(1000, 'a'), (1001, 'b')})
(2, {(2000, 'a'), (2001, 'b'), (2002, 'c')})
A = load 'data' as (id:int, hits:{(score:int, name:chararray)});
B = foreach A {
filtered = filter hits by score > 2000;
generate id, filtered;
};
dump B;
(1,{})
(2,{(2001,'b'),(2002,'c')})
C = filter B by SIZE(filtered) > 0;
dump C;
(1,{})
(2,{(2001,'b'),(2002,'c')})
{code}
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