From d70783541626f1cc9fc45eabc8b0b1fc4e47145a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Rivi=C3=A8re?= <fil@rezo.net>
Date: Fri, 11 Oct 2024 12:53:28 +0200
Subject: [PATCH] fix handling of null values in arrow vectors (#2195)

* closes #2194
---
 src/options.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/options.js b/src/options.js
index ac9caca472..144fd3b37b 100644
--- a/src/options.js
+++ b/src/options.js
@@ -68,8 +68,12 @@ function maybeTypedArrowify(vector, type) {
   return vector == null
     ? vector
     : (type === undefined || type === Array) && isArrowDateType(vector.type)
-    ? coerceDates(vector.toArray())
-    : maybeTypedArrayify(vector.toArray(), type);
+    ? coerceDates(vectorToArray(vector))
+    : maybeTypedArrayify(vectorToArray(vector), type);
+}
+
+function vectorToArray(vector) {
+  return vector.nullCount ? vector.toJSON() : vector.toArray();
 }
 
 export const singleton = [null]; // for data-less decoration marks, e.g. frame