From cf72c91bf327becb121e8f8c8c94b9636a6edabc Mon Sep 17 00:00:00 2001
From: Jin Shang <shangjin1997@gmail.com>
Date: Tue, 19 Dec 2023 09:26:42 +0800
Subject: [PATCH] fix

---
 cpp/src/arrow/compute/kernels/scalar_string_ascii.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cpp/src/arrow/compute/kernels/scalar_string_ascii.cc b/cpp/src/arrow/compute/kernels/scalar_string_ascii.cc
index 8555474ea6da5..4d4b77abed508 100644
--- a/cpp/src/arrow/compute/kernels/scalar_string_ascii.cc
+++ b/cpp/src/arrow/compute/kernels/scalar_string_ascii.cc
@@ -2596,10 +2596,12 @@ struct SliceBytesTransform : StringSliceTransformBase {
     }
 
     if (step < 0) {
-      return std::max(static_cast<int64_t>(0), (stop - start + step + 1) / step);
+      return static_cast<int32_t>(
+          std::max(static_cast<int64_t>(0), (stop - start + step + 1) / step));
     }
 
-    return std::max(static_cast<int64_t>(0), (stop - start + step - 1) / step);
+    return static_cast<int32_t>(
+        std::max(static_cast<int64_t>(0), (stop - start + step - 1) / step));
   }
 };