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Posted to issues@spark.apache.org by "Dongjoon Hyun (JIRA)" <ji...@apache.org> on 2018/08/17 12:27:00 UTC

[jira] [Created] (SPARK-25143) Support custom map for data sources

Dongjoon Hyun created SPARK-25143:
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             Summary: Support custom map for data sources
                 Key: SPARK-25143
                 URL: https://issues.apache.org/jira/browse/SPARK-25143
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Dongjoon Hyun


Currently, for better UX, Apache Spark provides data source backward compatibility by using the pre-defined built-in `backwardCompatibilityMap`.

 * [https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala#L564]

Although this mapping table is maintained carefully, but it's not flexible when we have multiple implementations like Avro/CSV/ORC. (For the detail, please see SPARK-24924 for the discussion.)

This issue aims to extend Spark backward-compatibility-mapping capability by allowing users provide a custom mapping in a general manner as configuration. If a user faces some issue with the provided mapping, he/she can override it by configuration.



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