Support comma separated file/directory names in load statements
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Key: PIG-1071
URL: https://issues.apache.org/jira/browse/PIG-1071
Project: Pig
Issue Type: New Feature
Reporter: Richard Ding
Currently Pig Latin support following LOAD syntax:
{code}
LOAD 'data' [USING loader function] [AS schema];
{code}
where data is the name of the file or directory, including files specified with
Hadoop-supported globing syntax. This name is passed to the loader function.
This feature is to support loaders that can load multiple files from different
directories and allows users to pass in the file names in a comma separated
string.
For example, these will be valid load statements:
{code}
LOAD '/usr/pig/test1/a,/usr/pig/test2/b' USING someloader()';
{code}
and
{code}
LOAD '/usr/pig/test1/{a,c},/usr/pig/test2/b' USING someloader();
{code}
This comma separated string is passed to the loader.
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