[SPARK-7294] ADD BETWEEN

Author: 云峤

python/pyspark/sql/dataframe.py

@@ -1289,6 +1289,18 @@ def cast(self, dataType):
             raise TypeError("unexpected type: %s" % type(dataType))
         return Column(jc)
 
+    @ignore_unicode_prefix
+    def between(self, col1, col2):
+        """ A boolean expression that is evaluated to true if the value of this
+        expression is between the given columns.
+
+        >>> df[df.col1.between(col2, col3)].collect()
+        [Row(col1=5, col2=6, col3=8)]
+        """
+        #sc = SparkContext._active_spark_context
+        jc = self > col1 & self < col2
+        return Column(jc)
+
     def __repr__(self):
         return 'Column<%s>' % self._jc.toString().encode('utf8')
 

python/pyspark/sql/tests.py

@@ -426,6 +426,12 @@ def test_rand_functions(self):
         for row in rndn:
             assert row[1] >= -4.0 and row[1] <= 4.0, "got: %s" % row[1]
 
+    def test_between_function(self):
+        df = self.sqlCtx.parallelize([Row(a=1, b=2, c=3), Row(a=2, b=1, c=3), Row(a=4, b=1, c=3)]).toDF()
+        self.assertEqual([False, True, False],
+                     df.select(df.a.between(df.b, df.c)).collect())
+
+
     def test_save_and_load(self):
         df = self.df
         tmpPath = tempfile.mkdtemp()

sql/core/src/main/scala/org/apache/spark/sql/Column.scala

@@ -295,6 +295,20 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    */
   def eqNullSafe(other: Any): Column = this <=> other
 
+  /**
+   * Between col1 and col2.
+   *
+   * @group java_expr_ops
+   */
+  def between(col1: String, col2: String): Column = between(Column(col1), Column(col2))
+
+  /**
+   * Between col1 and col2.
+   *
+   * @group java_expr_ops
+   */
+  def between(col1: Column, col2: Column): Column = And(GreaterThan(this.expr, col1.expr), LessThan(this.expr, col2.expr))
+
   /**
    * True if the current expression is null.
    *

sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala

@@ -208,6 +208,12 @@ class ColumnExpressionSuite extends QueryTest {
       testData2.collect().toSeq.filter(r => r.getInt(0) <= r.getInt(1)))
   }
 
+  test("between") {
+    checkAnswer(
+      testData4.filter($"a".between($"b", $"c")),
+      testData4.collect().toSeq.filter(r => r.getInt(0) > r.getInt(1) && r.getInt(0) < r.getInt(2)))
+  }
+
   val booleanData = TestSQLContext.createDataFrame(TestSQLContext.sparkContext.parallelize(
     Row(false, false) ::
       Row(false, true) ::

sql/core/src/test/scala/org/apache/spark/sql/TestData.scala

@@ -57,6 +57,17 @@ object TestData {
       TestData2(3, 2) :: Nil, 2).toDF()
   testData2.registerTempTable("testData2")
 
+  case class TestData4(a: Int, b: Int, c: Int)
+  val testData4 =
+    TestSQLContext.sparkContext.parallelize(
+      TestData4(0, 1, 2) ::
+        TestData4(1, 2, 3) ::
+        TestData4(2, 1, 0) ::
+        TestData4(2, 2, 4) ::
+        TestData4(3, 1, 6) ::
+        TestData4(3, 2, 0) :: Nil, 2).toDF()
+  testData4.registerTempTable("TestData4")
+
   case class DecimalData(a: BigDecimal, b: BigDecimal)
 
   val decimalData =