Fixes to postgres methods

Don't lower-case table names
Put double quotes around table name in copy statement

parsons/databases/postgres/postgres.py

@@ -88,7 +88,7 @@ def copy(
                 self.query_with_connection(sql, connection, commit=False)
                 logger.info(f"{table_name} created.")
 
-            sql = f"""COPY {table_name} ("{'","'.join(tbl.columns)}") FROM STDIN CSV HEADER;"""
+            sql = f"""COPY "{table_name}" ("{'","'.join(tbl.columns)}") FROM STDIN CSV HEADER;"""
 
             with self.cursor(connection) as cursor:
                 cursor.copy_expert(sql, open(tbl.to_csv(), "r"))

parsons/databases/postgres/postgres_core.py

@@ -226,9 +226,9 @@ def table_exists_with_connection(self, table_name, connection, view=True):
         # Extract the table and schema from this. If no schema is detected then
         # will default to the public schema.
         try:
-            schema, table = table_name.lower().split(".", 1)
+            schema, table = table_name.split(".", 1)
         except ValueError:
-            schema, table = "public", table_name.lower()
+            schema, table = "public", table_name
 
         with self.cursor(connection) as cursor:
             # Check in pg tables for the table