liyunzhang_intel created PIG-4595:
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Summary: Fix unit test failures about TestFRJoinNullValue in spark
mode
Key: PIG-4595
URL: https://issues.apache.org/jira/browse/PIG-4595
Project: Pig
Issue Type: Sub-task
Reporter: liyunzhang_intel
Assignee: liyunzhang_intel
based on f9a50f3, using following command to test TestFRJoinNullValue：
ant -Dtestcase=TestFRJoinNullValue -Dexectype=spark -Dhadoopversion=23 test
following ut fail:
• org.apache.pig.test.TestFRJoinNullValue.testTupleLeftNullMatch
• org.apache.pig.test.TestFRJoinNullValue.testLeftNullMatch
• org.apache.pig.test.TestFRJoinNullValue.testTupleNullMatch
• org.apache.pig.test.TestFRJoinNullValue.testNullMatch
The reason why these unit test fail is because null value from table a and
table b are considered same when table a fr join table b.
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