built in aggregate functions fail on invalid input
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Key: PIG-54
URL: https://issues.apache.org/jira/browse/PIG-54
Project: Pig
Issue Type: Bug
Reporter: Olga Natkovich
This issue is true for all built-in aggregate functions. If they get type
different from what they expect, they through an exception. Instead, they
should treat the value as null. We still need to define what that means in Pig
but if we stick with SQL definition, all but count(*) computations would ignore
them.
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