Github user aokolnychyi commented on the issue: https://github.com/apache/spark/pull/19252 @gatorsmile thanks for the feedback. I also covered ``TruncateTableCommand`` with additional tests. However, I see a bit strange behavior while creating a test for ``AlterTableAddPartitionCommand ``. ``` sql(s"CREATE TABLE t1 (col1 int, col2 int) USING PARQUET") sql(s"INSERT INTO TABLE t1 SELECT 1, 2") sql(s"INSERT INTO TABLE t1 SELECT 2, 4") sql("SELECT * FROM t1").show() +----+----+ |col1|col2| +----+----+ | 1| 2| | 2| 4| +----+----+ sql(s"CREATE TABLE t2 (col1 int, col2 int) USING PARQUET PARTITIONED BY (col1)") sql(s"INSERT INTO TABLE t2 SELECT 1, 2") sql(s"INSERT INTO TABLE t2 SELECT 2, 4") sql("SELECT * FROM t2").show() +----+----+ |col2|col1| +----+----+ | 2| 4| | 1| 2| +----+----+ ``` Why are the results different? Is it a bug?
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