From c9d28fb2e5030f8f07b14379789c698a04573eec Mon Sep 17 00:00:00 2001
From: Lin Nikaido <153617286+Lin-Nikaido@users.noreply.github.com>
Date: Tue, 9 Sep 2025 14:24:11 +0900
Subject: [PATCH] fix

---
 src/google/adk/sessions/database_session_service.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/google/adk/sessions/database_session_service.py b/src/google/adk/sessions/database_session_service.py
index 959524c689..5799ea7936 100644
--- a/src/google/adk/sessions/database_session_service.py
+++ b/src/google/adk/sessions/database_session_service.py
@@ -112,6 +112,8 @@ class DynamicPickleType(TypeDecorator):
   impl = PickleType
 
   def load_dialect_impl(self, dialect):
+    if dialect.name == "mysql":
+      return dialect.type_descriptor(mysql.LONGBLOB)
     if dialect.name == "spanner+spanner":
       from google.cloud.sqlalchemy_spanner.sqlalchemy_spanner import SpannerPickleType