Provide a way to pin LogicalOperator Options
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Key: PIG-990
URL: https://issues.apache.org/jira/browse/PIG-990
Project: Pig
Issue Type: Bug
Components: impl
Reporter: Dmitriy V. Ryaboy
Priority: Minor
Fix For: 0.6.0
This is a proactive patch, setting up the groundwork for adding an optimizer.
Some of the LogicalOperators have options. For example, LOJoin has a variety of
join types (regular, fr, skewed, merge), which can be set by the user or chosen
by a hypothetical optimizer. If a user selects a join type, pig philoophy
guides us to always respect the user's choice and not explore alternatives.
Therefore, we need a way to "pin" options.
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