rdblue commented on issue #23714: [SPARK-26744][SQL]Support schema validation in FileDataSourceV2 framework URL: https://github.com/apache/spark/pull/23714#issuecomment-461875332 @gengliangwang, why are you proposing to add this API that applies only to internal sources? Why not design this to work with all sources? I think you also need to be more clear about what you're trying to commit. What does this do? It sounds like it probably validates that a file format can stores a type. For example, can ORC support DECIMAL(44, 6)? That is generally useful. Why should it be a side API for internal sources? In short: * Please be clear in your description about what this commit does. What exactly does the validation do? * Please give a reason why it should apply only to internal sources given that a goal of the DSv2 API is to avoid special cases for internal sources.
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