gengliangwang commented on issue #23714: [SPARK-26744][SQL]Support schema validation in FileDataSourceV2 framework URL: https://github.com/apache/spark/pull/23714#issuecomment-463489842 @rdblue For example, when Spark try writing data contains Array type column to CSV source: 1. without the validation: there will be exceptions on execution tasks. 2. with the validation: there will be exception before launching tasks. Also, the error message is more user-friendly.
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