load and store function should be file independent
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                 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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