Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/20618#discussion_r169086344 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala --- @@ -1313,131 +1313,168 @@ object functions { ////////////////////////////////////////////////////////////////////////////////////////////// /** - * Computes the cosine inverse of the given value; the returned angle is in the range - * 0.0 through pi. + * @return angle in radians whose cosine is `e`, as if computed by [[java.lang.Math#acos]] * * @group math_funcs * @since 1.4.0 */ def acos(e: Column): Column = withExpr { Acos(e.expr) } + // scalastyle:off line.size.limit /** - * Computes the cosine inverse of the given column; the returned angle is in the range - * 0.0 through pi. + * @return angle in radians whose cosine is `columnName` as if computed by [[java.lang.Math#acos]] * * @group math_funcs * @since 1.4.0 */ def acos(columnName: String): Column = acos(Column(columnName)) /** - * Computes the sine inverse of the given value; the returned angle is in the range - * -pi/2 through pi/2. + * @return angle in radians whose sine is `e`, as if computed by [[java.lang.Math#asin]] * * @group math_funcs * @since 1.4.0 */ def asin(e: Column): Column = withExpr { Asin(e.expr) } /** - * Computes the sine inverse of the given column; the returned angle is in the range - * -pi/2 through pi/2. + * @return angle in radians whose sine is `columnName`, as if computed by [[java.lang.Math#asin]] * * @group math_funcs * @since 1.4.0 */ def asin(columnName: String): Column = asin(Column(columnName)) /** - * Computes the tangent inverse of the given column; the returned angle is in the range - * -pi/2 through pi/2 + * @return angle in radians whose tangent is `e`, as if computed by [[java.lang.Math#atan]] * * @group math_funcs * @since 1.4.0 */ def atan(e: Column): Column = withExpr { Atan(e.expr) } + // scalastyle:off line.size.limit /** - * Computes the tangent inverse of the given column; the returned angle is in the range - * -pi/2 through pi/2 + * @return angle in radians whose tangent is `columnName`, as if computed by [[java.lang.Math#atan]] * * @group math_funcs * @since 1.4.0 */ def atan(columnName: String): Column = atan(Column(columnName)) /** - * Returns the angle theta from the conversion of rectangular coordinates (x, y) to - * polar coordinates (r, theta). Units in radians. + * --- End diff -- Tiny nit: remove this first blank line.
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