make null level null

moj-analytical-services · Nov 11, 2023 · 6c022a5 · 6c022a5
1 parent 30ad12f
commit 6c022a5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/splink/comparison_level_library.py b/splink/comparison_level_library.py
@@ -21,6 +21,10 @@ def validate_distance_threshold(
 
 
 class NullLevel(ComparisonLevelCreator):
+    def __init__(self, col_name: str):
+        super().__init__(col_name)
+        self.is_null_level = True
+
     def create_sql(self, sql_dialect: SplinkDialect) -> str:
         col = self.input_column(sql_dialect)
         return f"{col.name_l()} IS NULL OR {col.name_r()} IS NULL"