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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