fix without cast

Author: sfc-gh-bkogan

src/snowflake/snowpark/_internal/analyzer/datatype_mapper.py

@@ -606,16 +606,9 @@ def numeric_to_sql_without_cast(value: Any, datatype: DataType) -> str:
 
     if not isinstance(datatype, _NumericType):
         # if the value is not numeric or the datatype is not numeric, fallback to the
-        # regular to_sql generation
+        # regular to_sql generation.
         return to_sql(value, datatype)
 
-    # DecFloatType must always use DECFLOAT 'value' syntax to preserve precision
-    if isinstance(datatype, DecFloatType):
-        if isinstance(value, str):
-            return f"DECFLOAT {str_to_sql(value)}"
-        else:
-            return f"DECFLOAT '{value}'"
-
     if isinstance(value, float) and isinstance(datatype, _FractionalType):
         # when the float value is NAN or INF, a cast is still required
         if math.isnan(value) or math.isinf(value):

tests/unit/test_datatype_mapper.py

@@ -700,6 +700,8 @@ def test_numeric_to_sql_without_cast():
     assert numeric_to_sql_without_cast(float("nan"), FloatType()) == "'NAN' :: FLOAT"
     assert numeric_to_sql_without_cast(float("inf"), DoubleType()) == "'INF' :: FLOAT"
 
+    assert numeric_to_sql_without_cast(Decimal(0.5), DecFloatType()) == "0.5"
+
 
 @pytest.mark.parametrize(
     "value, datatype",