huaxingao opened a new pull request #26303: [SPARK-29643][SQL] ALTER TABLE (DROP PARTITION) should look up catalog/table like v2 commands URL: https://github.com/apache/spark/pull/26303 ###What changes were proposed in this pull request? Add AlterTableDropPartitionStatement and make ALTER TABLE ... DROP PARTITION go through the same catalog/table resolution framework of v2 commands. ### Why are the changes needed? It's important to make all the commands have the same table resolution behavior, to avoid confusing end-users. e.g. ``` USE my_catalog DESC t // success and describe the table t from my_catalog ALTER TABLE t DROP PARTITION (id=1) // report table not found as there is no table t in the session catalog ``` ### Does this PR introduce any user-facing change? Yes. When running ALTER TABLE ... DROP PARTITION, Spark fails the command if the current catalog is set to a v2 catalog, or the table name specified a v2 catalog. ### How was this patch tested? Unit tests.
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