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https://issues.apache.org/jira/browse/PIG-778?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Olga Natkovich resolved PIG-778.
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Resolution: Won't Fix
This becomes irrelevant after Pig 0.7.0
> ReversibleLoadStore Semantics
> -----------------------------
>
> Key: PIG-778
> URL: https://issues.apache.org/jira/browse/PIG-778
> Project: Pig
> Issue Type: Improvement
> Reporter: Gunther Hagleitner
>
> The question about how to use the ReversibleLoadStore function came up in 2
> scenarios recently:
> a) Can we generate a load operator from a store by simply taking the same
> store function string, if the store function is a ReversibleLoadStore
> function? I would like to use that to remove unnecessary compiler generated
> stores, if we can change the depending load operators to load from a
> different store.
> b) Is it sufficient to check whether a pair of store and load operations on
> the same location is reversible to know whether we can eliminate it without
> changing the data? This is done in the pig server for logical plans right now.
> If I go by PigStorage then, the answer to (a) is yes. The answer to (b) is
> no, but we also need to check that both load and store use the same parameter
> to the reversible function.
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