correcting the name of the column for issue #182 in both the scala and the python code

Author: souvik-databricks

python/tests/tsdf_tests.py

@@ -156,7 +156,7 @@ def test_describe(self):
         # joined dataframe should equal the expected dataframe
         # self.assertDataFramesEqual(res, dfExpected)
         assert res.count() == 7
-        assert res.filter(F.col("unique_ts_count") != " ").select(F.max(F.col('unique_ts_count'))).collect()[0][
+        assert res.filter(F.col("unique_time_series_count") != " ").select(F.max(F.col('unique_time_series_count'))).collect()[0][
                    0] == "1"
         assert res.filter(F.col("min_ts") != " ").select(F.col('min_ts').cast("string")).collect()[0][
                    0] == '2020-08-01 00:00:10'

scala/tempo/src/main/scala/com/databrickslabs/tempo/TSDF.scala

@@ -453,6 +453,7 @@ private[tempo] sealed class BaseTSDF(val df: DataFrame,
 		val global_smry_rec = desc_stats.limit(1).select(non_summary_cols_blank: _*)
 
 		val full_smry = global_smry_rec.union(desc_stats)
+		val full_smry = full_smry.withColumnRenamed("unique_ts_count","unique_time_series_count")
 
     return(full_smry)
 	}

scala/tempo/src/test/scala/com/databrickslabs/tempo/DescribeTests.scala

@@ -42,7 +42,7 @@ class DescribeTests
 		// joined dataframe should equal the expected dataframe
 		// self.assertDataFramesEqual(res, dfExpected)
 		assert(res.count == 7)
-		assert(res.select(max(col("unique_ts_count"))).collect()(0)(0) == "1")
+		assert(res.select(max(col("unique_time_series_count"))).collect()(0)(0) == "1")
 		assert(res.select(col("min_ts").cast("string")).collect()(0)(0) == "2020-08-01 00:00:10")
 		assert(res.select(col("max_ts").cast("string")).collect()(0)(0) == "2020-09-01 00:19:12")
 	}