[jira] Commented: (PIG-86) load and store function should be file independent

["Pi Song (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-86?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12587184#action_12587184 ] 

Pi Song commented on PIG-86:
----------------------------

There is a demand to be able to read data from databases or external services.
I think we need to modify the load syntax a bit or introduce a new syntax (whatever suitable) instead of passing a dummy file.

> load and store function should be file independent
> --------------------------------------------------
>
>                 Key: PIG-86
>                 URL: https://issues.apache.org/jira/browse/PIG-86
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Stefan Groschupf
>            Priority: Critical
>
> Currently pig is very file system centric for input LoadFunc and output StoreFunc.
> However in many buzz usecases the data are not in the dfs directly but come from a remote service. Also it is common to store the results into a database for a webbased ui.
> There for I suggest to make filepath elements in the gramar optional.
> For example:
> A = load 'mydata' using PigStorage() // " 'myData' " would be optional  
> STORE A into 'output.bz2' USING myStore(); //  " into 'output.bz2' " would be optional.
> Current workaround for implementing Load and Store functions that work without file system access is to create temporary dummy files since pig is checking for this files, even if the load and store functions do not need those file.

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