From 9784313adf027ce99a17efbd554accc0971733f4 Mon Sep 17 00:00:00 2001
From: Neville Dipale <nevilledips@gmail.com>
Date: Mon, 4 Mar 2019 21:25:50 +0200
Subject: [PATCH] fix doc comment

---
 rust/arrow/src/compute/cast_kernels.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/rust/arrow/src/compute/cast_kernels.rs b/rust/arrow/src/compute/cast_kernels.rs
index 62940b5729b73..ec261bfa2fdff 100644
--- a/rust/arrow/src/compute/cast_kernels.rs
+++ b/rust/arrow/src/compute/cast_kernels.rs
@@ -427,7 +427,8 @@ where
 
 /// Cast Boolean types to numeric
 ///
-/// Any zero value returns `false` while non-zero returns `true`
+/// `false` returns 0 while `true` returns 1. Although this cast supports floats, they are
+/// unsupported in the upstream cast
 fn cast_bool_to_numeric<T>(from: &BooleanArray) -> Result<PrimitiveArray<T>>
 where
     T: ArrowPrimitiveType + ArrowNumericType,