Implementation of Sample should use LessThanExpression instead of
LessThanEqualExpression
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Key: PIG-2136
URL: https://issues.apache.org/jira/browse/PIG-2136
Project: Pig
Issue Type: Bug
Reporter: Gianmarco De Francisci Morales
Assignee: Gianmarco De Francisci Morales
Priority: Minor
Currently LogicalPlanBuilder uses a filter with 'Math.random() <= const' to
implement Sample.
Actually it should use 'Math.random() < const' to be correct, because
Math.random() generates a number 0 <= x < 1
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