/// <inheritdoc cref="State{T}.Sum"/>
public override FrequenciesAndNumRows Sum(FrequenciesAndNumRows other)
{
IEnumerable <string> columns = Frequencies.Schema().Fields
.Select(field => field.Name)
.Where(field => field != AnalyzersExt.COUNT_COL);
IEnumerable <Column> projectionAfterMerge = columns
.Select(col =>
Coalesce(Col($"this.{col}"), Col($"other.{col}")).As(col))
.Append(
(AnalyzersExt.ZeroIfNull($"this.{AnalyzersExt.COUNT_COL}") +
AnalyzersExt.ZeroIfNull($"other.{AnalyzersExt.COUNT_COL}")).As(AnalyzersExt.COUNT_COL));
Column joinCondition = columns.Aggregate(NullSafeEq(columns.First()),
(previous, result) => previous.And(NullSafeEq(result)));
DataFrame frequenciesSum = Frequencies
.Alias("this")
.Join(other.Frequencies.Alias("other"), joinCondition, "outer")
.Select(projectionAfterMerge.ToArray());
return(new FrequenciesAndNumRows(frequenciesSum, NumRows + other.NumRows));
}
public void TestAlias()
{
// Arrange
const string alias = "alias1";
var expectedResultDataFrameProxy = new Mock <IDataFrameProxy>().Object;
mockDataFrameProxy.Setup(m => m.Alias(It.IsAny <string>())).Returns(expectedResultDataFrameProxy);
var sc = new SparkContext(null);
// Act
var originalDataFrame = new DataFrame(mockDataFrameProxy.Object, sc);
var actualResultDataFrame = originalDataFrame.Alias(alias);
// Assert
mockDataFrameProxy.Verify(m => m.Alias(alias)); // assert Drop of Proxy was invoked with correct parameters
Assert.AreEqual(expectedResultDataFrameProxy, actualResultDataFrame.DataFrameProxy);
}
public void TestSignaturesV2_3_X()
{
Column col = _df["name"];
col = _df["age"];
DataFrame df = _df.ToDF();
df = df.ToDF("name2", "age2");
StructType schema = _df.Schema();
Assert.NotNull(schema);
_df.PrintSchema();
_df.Explain();
_df.Explain(true);
_df.Explain(false);
Assert.Equal(2, _df.Columns().ToArray().Length);
_df.IsLocal();
_df.IsStreaming();
using (var tempDir = new TemporaryDirectory())
{
// The following is required for *CheckPoint().
_spark.SparkContext.SetCheckpointDir(tempDir.Path);
_df.Checkpoint();
_df.Checkpoint(false);
_df.LocalCheckpoint();
_df.LocalCheckpoint(false);
}
_df.WithWatermark("time", "10 minutes");
_df.Show();
_df.Show(10);
_df.Show(10, 10);
_df.Show(10, 10, true);
_df.Join(_df);
_df.Join(_df, "name");
_df.Join(_df, new[] { "name" });
_df.Join(_df, new[] { "name" }, "outer");
_df.Join(_df, _df["age"] == _df["age"]);
_df.Join(_df, _df["age"] == _df["age"], "outer");
_df.CrossJoin(_df);
_df.SortWithinPartitions("age");
_df.SortWithinPartitions("age", "name");
_df.SortWithinPartitions();
_df.SortWithinPartitions(_df["age"]);
_df.SortWithinPartitions(_df["age"], _df["name"]);
_df.Sort("age");
_df.Sort("age", "name");
_df.Sort();
_df.Sort(_df["age"]);
_df.Sort(_df["age"], _df["name"]);
_df.OrderBy("age");
_df.OrderBy("age", "name");
_df.OrderBy();
_df.OrderBy(_df["age"]);
_df.OrderBy(_df["age"], _df["name"]);
_df.Hint("broadcast");
_df.Hint("broadcast", new[] { "hello", "world" });
_df.Col("age");
_df.ColRegex("age");
_df.As("alias");
_df.Alias("alias");
_df.Select("age");
_df.Select("age", "name");
_df.Select();
_df.Select(_df["age"]);
_df.Select(_df["age"], _df["name"]);
_df.SelectExpr();
_df.SelectExpr("age * 2");
_df.SelectExpr("age * 2", "abs(age)");
_df.Filter(_df["age"] > 21);
_df.Filter("age > 21");
_df.Where(_df["age"] > 21);
_df.Where("age > 21");
_df.GroupBy("age");
_df.GroupBy("age", "name");
_df.GroupBy();
_df.GroupBy(_df["age"]);
_df.GroupBy(_df["age"], _df["name"]);
_df.Rollup("age");
_df.Rollup("age", "name");
_df.Rollup();
_df.Rollup(_df["age"]);
_df.Rollup(_df["age"], _df["name"]);
_df.Cube("age");
_df.Cube("age", "name");
_df.Cube();
_df.Cube(_df["age"]);
_df.Cube(_df["age"], _df["name"]);
_df.Agg(Avg(_df["age"]));
_df.Agg(Avg(_df["age"]), Avg(_df["name"]));
_df.Limit(10);
_df.Union(_df);
_df.UnionByName(_df);
_df.Intersect(_df);
_df.Except(_df);
_df.Sample(0.5);
_df.Sample(0.5, true);
_df.Sample(0.5, false, 12345);
_df.RandomSplit(new[] { 0.2, 0.8 });
_df.RandomSplit(new[] { 0.2, 0.8 }, 12345);
_df.WithColumn("age2", _df["age"]);
_df.WithColumnRenamed("age", "age2");
_df.Drop();
_df.Drop("age");
_df.Drop("age", "name");
_df.Drop(_df["age"]);
_df.DropDuplicates();
_df.DropDuplicates("age");
_df.DropDuplicates("age", "name");
_df.Describe();
_df.Describe("age");
_df.Describe("age", "name");
_df.Summary();
_df.Summary("count");
_df.Summary("count", "mean");
_df.Head(2);
_df.Head();
_df.First();
_df.Take(3).ToArray();
_df.Collect().ToArray();
_df.ToLocalIterator().ToArray();
_df.Count();
_df.Repartition(2);
_df.Repartition(2, _df["age"]);
_df.Repartition(_df["age"]);
_df.Repartition();
_df.RepartitionByRange(2, _df["age"]);
_df.RepartitionByRange(_df["age"]);
_df.Coalesce(1);
_df.Distinct();
_df.Persist();
_df.Cache();
_df.Unpersist();
_df.CreateTempView("view");
_df.CreateOrReplaceTempView("view");
_df.CreateGlobalTempView("global_view");
_df.CreateOrReplaceGlobalTempView("global_view");
}
