Incorrect behaviors in overwrite table for datasource tables

  test("foo") {
    withTable("test") {
      spark.range(10)
        .selectExpr("id", "id as A", "'x' as B")
        .write.partitionBy("A", "B").mode("overwrite")
        .saveAsTable("test")
      spark.sql("insert overwrite table test select id, id, 'x' from range(1)")
      assert(spark.sql("select * from test").count() == 1)
    }
  }

  test("bar") {
    withTable("test") {
      spark.range(10)
        .selectExpr("id", "id as A", "'x' as B")
        .write.partitionBy("A", "B").mode("overwrite")
        .saveAsTable("test")
      spark.sql("insert overwrite table test partition (a, b) select id, id, 'x' from range(1)")
      assert(spark.sql("select * from test").count() == 1)
    }
  }

  test("baz") {
    withTable("test") {
      spark.range(10)
        .selectExpr("id", "id as A", "'x' as B")
        .write.partitionBy("A", "B").mode("overwrite")
        .saveAsTable("test")
      spark.sql("insert overwrite table test partition (A, B) select id, id, 'x' from range(1)")
      assert(spark.sql("select * from test").count() == 1)
    }
  }

  test("qux") {
    withTable("test") {
      spark.range(10)
        .selectExpr("id", "id as A", "'x' as B")
        .write.partitionBy("A", "B").mode("overwrite")
        .saveAsTable("test")
      spark.sql("insert overwrite table test partition (a=1, b) select id, 'x' from range(1)")
      assert(spark.sql("select * from test").count() == 10)
    }
  }