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https://issues.apache.org/jira/browse/PIG-5261?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sridhar Sailappan updated PIG-5261:
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Attachment: Patch_Pig_Macro_20170615.txt
> Support for macro based property definitions in Pig
> ---------------------------------------------------
>
> Key: PIG-5261
> URL: https://issues.apache.org/jira/browse/PIG-5261
> Project: Pig
> Issue Type: Improvement
> Components: parser
> Affects Versions: 0.16.0
> Reporter: Sridhar Sailappan
> Attachments: Patch_Pig_Macro_20170615.txt
>
>
> The attached patch provides support for property configurations with macro
> based definitions (relying on variable expansion of Hadoop Configuration).
>
> e.g., Consider the following definition of properties for HDFS.
> 1) The property "fs.defaultFS" is defined to have value "${fs.defaultFS.dev}"
> 2) The custom property "fs.defaultFS.dev" is defined to have value
> "hdfs://dev-sandbox.domain.com:8020"
>
> Now, when referencing the property "fs.defaultFS", the value should be
> resolved to "hdfs://dev-sandbox.domain.com:8020".
>
> This is typical variable expansion that is expected in Hadoop Configuration.
> Refer:
> https://hadoop.apache.org/docs/r2.6.0/api/org/apache/hadoop/conf/Configuration.html
> This functionality of variable expansion is not available with Pig. The
> attached patch (on branch-0.16) addresses this need.
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