From faad5c38d3c6f8199ba97a76b937f5eff5252d8e Mon Sep 17 00:00:00 2001
From: Emanuele Guidotti <emanuele.guidotti@unine.ch>
Date: Sun, 11 Feb 2024 11:05:54 +0100
Subject: [PATCH] Update database.py

---
 bornrule/sql/database.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/bornrule/sql/database.py b/bornrule/sql/database.py
index 6b9090a..10fd16a 100644
--- a/bornrule/sql/database.py
+++ b/bornrule/sql/database.py
@@ -383,6 +383,8 @@ def _sql_transform(self, items, concat, name):
                 1.0 AS {self.w}
             FROM 
                 {table}
+            WHERE
+                {items[2]} IS NOT NULL
             """
         
     def _sql_partial_fit(self, items, sample_weight):