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## What changes were proposed in this pull request? This PR implements Spark's own GetFunctionsOperation which mitigates the differences between Spark SQL and Hive UDFs. But our implementation is different from Hive's implementation: - Our implementation always returns results. Hive only returns results when [(null == catalogName || "".equals(catalogName)) && (null == schemaName || "".equals(schemaName))](https://github.com/apache/hive/blob/rel/release-3.1.1/service/src/java/org/apache/hive/service/cli/operation/GetFunctionsOperation.java#L101-L119). - Our implementation pads the `REMARKS` field with the function usage - Hive returns an empty string. - Our implementation does not support `FUNCTION_TYPE`, but Hive does. ## How was this patch tested? unit tests Closes #25252 from wangyum/SPARK-28510. Authored-by: Yuming Wang <yumwang@ebay.com> Signed-off-by: gatorsmile <gatorsmile@gmail.com> |
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