From f421119f9d3b9c132fa2b89939acf2357e12cac9 Mon Sep 17 00:00:00 2001
From: Arik Fraimovich <arik@arikfr.com>
Date: Tue, 19 Feb 2019 16:04:00 +0200
Subject: [PATCH] Remove options NullPool does not support (#3460)

---
 redash/models/base.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/redash/models/base.py b/redash/models/base.py
index 461aa21a3d..529fff6329 100644
--- a/redash/models/base.py
+++ b/redash/models/base.py
@@ -18,6 +18,8 @@ def apply_pool_defaults(self, app, options):
         super(RedashSQLAlchemy, self).apply_pool_defaults(app, options)
         if settings.SQLALCHEMY_DISABLE_POOL:
             options['poolclass'] = NullPool
+            # Remove options NullPool does not support:
+            options.pop('max_overflow')
 
 
 db = RedashSQLAlchemy(session_options={