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## What changes were proposed in this pull request? This refactors the external catalog to be an interface. It can be easier for the future work in the catalog federation. After the refactoring, `ExternalCatalog` is much cleaner without mixing the listener event generation logic. ## How was this patch tested? The existing tests Author: gatorsmile <gatorsmile@gmail.com> Closes #21122 from gatorsmile/refactorExternalCatalog. |
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| compatibility/src/test/scala/org/apache/spark/sql/hive/execution | ||
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| pom.xml | ||