[SPARK-7294] ADD BETWEEN

Author: 云峤

python/pyspark/sql/dataframe.py

@@ -1290,15 +1290,14 @@ def cast(self, dataType):
         return Column(jc)
 
     @ignore_unicode_prefix
-    def between(self, col1, col2):
+    def between(self, lowerBound, upperBound):
         """ 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()
+        >>> df[df.col1.between(lowerBound, upperBound)].collect()
         [Row(col1=5, col2=6, col3=8)]
         """
-        #sc = SparkContext._active_spark_context
-        jc = self > col1 & self < col2
+        jc = (self >= lowerBound) & (self <= upperBound)
         return Column(jc)
 
     def __repr__(self):

python/pyspark/sql/tests.py

@@ -427,8 +427,8 @@ def test_rand_functions(self):
             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 = self.sqlCtx.parallelize([Row(a=1, b=2, c=3), Row(a=2, b=1, c=3), Row(a=4, b=1, c=4)]).toDF()
+        self.assertEqual([False, True, True],
                      df.select(df.a.between(df.b, df.c)).collect())
 
 

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

@@ -296,18 +296,23 @@ class Column(protected[sql] val expr: Expression) extends Logging {
   def eqNullSafe(other: Any): Column = this <=> other
 
   /**
-   * Between col1 and col2.
+   * True if the current column is between the lower bound and upper bound, inclusive.
    *
    * @group java_expr_ops
    */
-  def between(col1: String, col2: String): Column = between(Column(col1), Column(col2))
+  def between(lowerBound: String, upperBound: String): Column = {
+    between(Column(lowerBound), Column(upperBound))
+  }
 
   /**
-   * Between col1 and col2.
+   * True if the current column is between the lower bound and upper bound, inclusive.
    *
    * @group java_expr_ops
    */
-  def between(col1: Column, col2: Column): Column = And(GreaterThan(this.expr, col1.expr), LessThan(this.expr, col2.expr))
+  def between(lowerBound: Column, upperBound: Column): Column = {
+    And(GreaterThanOrEqual(this.expr, lowerBound.expr),
+      LessThanOrEqual(this.expr, upperBound.expr))
+  }
 
   /**
    * True if the current expression is null.

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

@@ -211,7 +211,7 @@ class ColumnExpressionSuite extends QueryTest {
   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)))
+      testData4.collect().toSeq.filter(r => r.getInt(0) >= r.getInt(1) && r.getInt(0) <= r.getInt(2)))
   }
 
   val booleanData = TestSQLContext.createDataFrame(TestSQLContext.sparkContext.parallelize(