From 8c408cb111ea4313e006b52583b7a0c7db750ca4 Mon Sep 17 00:00:00 2001
From: Florian Valeye <florian.valeye@gmail.com>
Date: Tue, 13 Apr 2021 21:26:35 +0200
Subject: [PATCH] Change the default Delta timestamp to Nanoseconds for Arrow

---
 rust/src/delta_arrow.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rust/src/delta_arrow.rs b/rust/src/delta_arrow.rs
index 26887f9356..0a68589832 100644
--- a/rust/src/delta_arrow.rs
+++ b/rust/src/delta_arrow.rs
@@ -92,8 +92,8 @@ impl TryFrom<&schema::SchemaDataType> for ArrowDataType {
                         Ok(ArrowDataType::Date32)
                     }
                     "timestamp" => {
-                        // Microsecond precision timestamp without a timezone.
-                        Ok(ArrowDataType::Timestamp(TimeUnit::Microsecond, None))
+                        // Issue: https://github.com/delta-io/delta/issues/643
+                        Ok(ArrowDataType::Timestamp(TimeUnit::Nanosecond, None))
                     }
                     s => Err(ArrowError::SchemaError(format!(
                         "Invalid data type for Arrow: {}",