diff --git a/langchain/document_loaders/snowflake_loader.py b/langchain/document_loaders/snowflake_loader.py
index b76a7426..59164124 100644
--- a/langchain/document_loaders/snowflake_loader.py
+++ b/langchain/document_loaders/snowflake_loader.py
@@ -53,13 +53,14 @@ class SnowflakeLoader(BaseLoader):
         self.database = database
         self.schema = schema
         self.parameters = parameters
-        self.page_content_columns = page_content_columns
-        self.metadata_columns = metadata_columns
+        self.page_content_columns = (
+            page_content_columns if page_content_columns is not None else ["*"]
+        )
+        self.metadata_columns = metadata_columns if metadata_columns is not None else []
 
     def _execute_query(self) -> List[Dict[str, Any]]:
         try:
             import snowflake.connector
-            from snowflake.connector import DictCursor
         except ImportError as ex:
             raise ValueError(
                 "Could not import snowflake-connector-python package. "
@@ -77,14 +78,13 @@ class SnowflakeLoader(BaseLoader):
             parameters=self.parameters,
         )
         try:
-            cur = conn.cursor(DictCursor)
+            cur = conn.cursor()
             cur.execute("USE DATABASE " + self.database)
             cur.execute("USE SCHEMA " + self.schema)
             cur.execute(self.query, self.parameters)
             query_result = cur.fetchall()
-            query_result = [
-                {k.lower(): v for k, v in item.items()} for item in query_result
-            ]
+            column_names = [column[0] for column in cur.description]
+            query_result = [dict(zip(column_names, row)) for row in query_result]
         except Exception as e:
             print(f"An error occurred: {e}")
             query_result = []
@@ -111,6 +111,8 @@ class SnowflakeLoader(BaseLoader):
             print(f"An error occurred during the query: {query_result}")
             return []
         page_content_columns, metadata_columns = self._get_columns(query_result)
+        if "*" in page_content_columns:
+            page_content_columns = list(query_result[0].keys())
         for row in query_result:
             page_content = "\n".join(
                 f"{k}: {v}" for k, v in row.items() if k in page_content_columns
@@ -120,4 +122,5 @@ class SnowflakeLoader(BaseLoader):
             yield doc
 
     def load(self) -> List[Document]:
+        """Load data into document objects."""
         return list(self.lazy_load())