SNOW-1655751: register overwritten functions under snowflake namesp…

…ace (#532)

* SNOW-1655751: register overwritten functions under `snowflake` namespace

DESCRIPTION.md

@@ -9,6 +9,9 @@ Source code is also available at:
 
 # Release Notes
 
+- 1.6.2
+  - Fixed SAWarning when registering functions with existing name in default namespace
+
 - v1.6.1(July 9, 2024)
 
   - Update internal project workflow with pypi publishing
@@ -24,7 +27,7 @@ Source code is also available at:
 
 - v1.5.3(April 16, 2024)
 
-    - Limit SQLAlchemy to < 2.0.0 before releasing version compatible with 2.0
+  - Limit SQLAlchemy to < 2.0.0 before releasing version compatible with 2.0
 
 - v1.5.2(April 11, 2024)
 
@@ -33,7 +36,7 @@ Source code is also available at:
 
 - v1.5.1(November 03, 2023)
 
-  - Fixed a compatibility issue with Snowflake Behavioral Change 1057 on outer lateral join, for more details check https://docs.snowflake.com/en/release-notes/bcr-bundles/2023_04/bcr-1057.
+  - Fixed a compatibility issue with Snowflake Behavioral Change 1057 on outer lateral join, for more details check <https://docs.snowflake.com/en/release-notes/bcr-bundles/2023_04/bcr-1057>.
   - Fixed credentials with `externalbrowser` authentication not caching due to incorrect parsing of boolean query parameters.
     - This fixes other boolean parameter passing to driver as well.
 

src/snowflake/sqlalchemy/base.py

@@ -184,7 +184,6 @@ def _join_determine_implicit_left_side(self, raw_columns, left, right, onclause)
                     [element._from_objects for element in statement._where_criteria]
                 ),
             ):
-
                 potential[from_clause] = ()
 
             all_clauses = list(potential.keys())
@@ -1065,4 +1064,4 @@ def visit_GEOMETRY(self, type_, **kw):
 
 construct_arguments = [(Table, {"clusterby": None})]
 
-functions.register_function("flatten", flatten)
+functions.register_function("flatten", flatten, "snowflake")