perf: Ensure raw_schema in stream mapper is immutable (#1962)

meltano · Sep 15, 2023 · 0da7a56 · 0da7a56
1 parent 97d97de
commit 0da7a56
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/singer_sdk/mapper.py b/singer_sdk/mapper.py
@@ -84,7 +84,7 @@ def __init__(
             flattening_options: Flattening options, or None to skip flattening.
         """
         self.stream_alias = stream_alias
-        self.raw_schema = raw_schema
+        self.raw_schema = copy.deepcopy(raw_schema)
         self.raw_key_properties = key_properties
         self.transformed_schema = raw_schema
         self.transformed_key_properties = key_properties