From 731db6389bc473333b95dd427a626c0a3ea41f1f Mon Sep 17 00:00:00 2001
From: laughingman7743 <laughingman7743@gmail.com>
Date: Sun, 18 May 2025 18:57:38 +0900
Subject: [PATCH] Fix incompatible dtype conversions in dataframe. (fix #532)

---
 pyathena/pandas/result_set.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pyathena/pandas/result_set.py b/pyathena/pandas/result_set.py
index 6c586e34..8856051a 100644
--- a/pyathena/pandas/result_set.py
+++ b/pyathena/pandas/result_set.py
@@ -206,7 +206,9 @@ def _trunc_date(self, df: "DataFrame") -> "DataFrame":
         description = self.description if self.description else []
         times = [d[0] for d in description if d[1] in ("time", "time with time zone")]
         if times:
-            df.loc[:, times] = df.loc[:, times].apply(lambda r: r.dt.time)
+            truncated = df.loc[:, times].apply(lambda r: r.dt.time)
+            for time in times:
+                df.isetitem(df.columns.get_loc(time), truncated[time])
         return df
 
     def fetchone(