[jira] [Created] (FLINK-4205) Implement stratified sampling for DataSet

[Shang Yuanchun (Jira)]

Do Le Quoc created FLINK-4205:
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             Summary: Implement stratified sampling for DataSet
                 Key: FLINK-4205
                 URL: https://issues.apache.org/jira/browse/FLINK-4205
             Project: Flink
          Issue Type: New Feature
            Reporter: Do Le Quoc


Since a Dataset might consist of data from disparate sources. As such, every data source should be considered fairly to have a representative sample. For this, stratified sampling is needed to ensure that data from every source (stratum) is selected and none of the minorities are excluded.



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