Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/20618#discussion_r169086289
--- 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]]
--- End diff --
It's not a big deal, but this change also makes the way this inverse
function is described inconsistent with how it's described above. I think it's
best to make them the same.
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