Gengliang Wang created SPARK-24675:
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Summary: Rename table: validate existence of new location
Key: SPARK-24675
URL: https://issues.apache.org/jira/browse/SPARK-24675
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.3.1
Reporter: Gengliang Wang
If table is renamed to a existing new location, data won't show up.
scala> Seq("hello").toDF("a").write.format("parquet").saveAsTable("t")
scala> sql("select * from t").show()
+-----+
| a|
+-----+
|hello|
+-----+
scala> sql("alter table t rename to test")
res2: org.apache.spark.sql.DataFrame = []
scala> sql("select * from test").show()
+---+
| a|
+---+
+—+
In Hive, if the new location exists, the renaming will fail even the location
is empty.
We should have the same validation in catalog, in case of unexpected bugs.
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