From 51173b4eb0336d2bda59538f3efa389b798f4beb Mon Sep 17 00:00:00 2001
From: "Jorge C. Leitao" <jorgecarleitao@gmail.com>
Date: Fri, 10 Jun 2022 03:30:14 +0000
Subject: [PATCH] Fixed divide by zero on empty row group

---
 src/io/parquet/read/deserialize/null.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/io/parquet/read/deserialize/null.rs b/src/io/parquet/read/deserialize/null.rs
index d8e050676be..f1efb87ef65 100644
--- a/src/io/parquet/read/deserialize/null.rs
+++ b/src/io/parquet/read/deserialize/null.rs
@@ -12,6 +12,9 @@ where
     while let Ok(Some(x)) = iter.next() {
         len += x.num_values()
     }
+    if len == 0 {
+        return Box::new(std::iter::empty());
+    }
 
     let complete_chunks = chunk_size / len;
     let remainder = chunk_size % len;