diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala index b49b1d327289f0660179de532ffc5c4cf428ed1c..d3efa83380d04ed0757357451d435d98171dbb9c 100644 --- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala +++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala @@ -716,6 +716,18 @@ class Column(protected[sql] val expr: Expression) extends Logging { */ def endsWith(literal: String): Column = this.endsWith(lit(literal)) + /** + * Gives the column an alias. Same as `as`. + * {{{ + * // Renames colA to colB in select output. + * df.select($"colA".alias("colB")) + * }}} + * + * @group expr_ops + * @since 1.4.0 + */ + def alias(alias: String): Column = as(alias) + /** * Gives the column an alias. * {{{ diff --git a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala index d006b83fc075abb52eea24b8596b68d4d8e97069..b8bb1bff9ea7227ecd6bad8ee786888c9c927384 100644 --- a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala +++ b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala @@ -27,6 +27,12 @@ import org.apache.spark.sql.types._ class ColumnExpressionSuite extends QueryTest { import org.apache.spark.sql.TestData._ + test("alias") { + val df = Seq((1, Seq(1, 2, 3))).toDF("a", "intList") + assert(df.select(df("a").as("b")).columns.head === "b") + assert(df.select(df("a").alias("b")).columns.head === "b") + } + test("single explode") { val df = Seq((1, Seq(1, 2, 3))).toDF("a", "intList") checkAnswer(