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From "Olga Natkovich (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PIG-242) Incremental operation
Date Wed, 05 Oct 2011 00:01:37 GMT

     [ https://issues.apache.org/jira/browse/PIG-242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Olga Natkovich updated PIG-242:
-------------------------------

    Fix Version/s:     (was: 0.10)
    
> Incremental operation
> ---------------------
>
>                 Key: PIG-242
>                 URL: https://issues.apache.org/jira/browse/PIG-242
>             Project: Pig
>          Issue Type: New Feature
>          Components: impl
>            Reporter: John DeTreville
>
> Some Pig programs repeatedly perform operations on different versions of tables, where
these versions differ only slightly. For example, a program may compute f(T) at one point
and f(T + delta T) at a later point. In many such cases, having already computed f(T) can
allow us to speed up the computation of f(T + delta T). For example, if f is a map operation,
then f(T + delta T) is f(T) + f(delta T), which can be computed relatively rapidly if delta
T is small and f(T) is already known.
> It is already possible but often tedious for Pig programers to perform incremental operations.
It would possibly help if Pig provided syntax for incremental operation.

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