Make COUNT and AVG deal with nulls accordingly with SQL standar
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Key: PIG-892
URL: https://issues.apache.org/jira/browse/PIG-892
Project: Pig
Issue Type: Improvement
Affects Versions: 0.3.0
Reporter: Olga Natkovich
Assignee: Olga Natkovich
Fix For: 0.4.0
both COUNT and AVG need to ignore nulls. Also add COUNT_STAR to match COUNT(*)
in SQL
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