Vertica: prevent overwriting row data when duplicated column names ex…

…ist (#4201)

* Vertica: prevent overwriting row data when duplicated column names exist

* remove enumeration

redash/query_runner/vertica.py

@@ -126,16 +126,12 @@ def run_query(self, query, user):
             logger.debug("Vertica running query: %s", query)
             cursor.execute(query)
 
-            # TODO - very similar to pg.py
             if cursor.description is not None:
-                columns_data = [(i[0], i[1]) for i in cursor.description]
-
-                # bug -- same name columns will always be assigned single last value
-                # corrected with fetch_columns in pull request https://github.com/getredash/redash/pull/4201
-                rows = [dict(zip((c[0] for c in columns_data), row)) for row in cursor.fetchall()]
-                columns = [{'name': col[0],
-                            'friendly_name': col[0],
-                            'type': types_map.get(col[1], None)} for col in columns_data]
+                columns_data = [(i[0], types_map.get(i[1], None)) for i in cursor.description]
+
+                columns = self.fetch_columns(column_data)
+                rows = [dict(zip(([c['name'] for c in columns]), r))
+                        for r in cursor.fetchall()]
 
                 data = {'columns': columns, 'rows': rows}
                 json_data = json_dumps(data)