refactor: Refactor datasource module (#1309)

dbgpt/rag/operators/datasource.py

@@ -3,14 +3,14 @@
 from typing import Any
 
 from dbgpt.core.interface.operators.retriever import RetrieverOperator
-from dbgpt.datasource.rdbms.base import RDBMSDatabase
+from dbgpt.datasource.rdbms.base import RDBMSConnector
 from dbgpt.rag.summary.rdbms_db_summary import _parse_db_summary
 
 
 class DatasourceRetrieverOperator(RetrieverOperator[Any, Any]):
     """The Datasource Retriever Operator."""
 
-    def __init__(self, connection: RDBMSDatabase, **kwargs):
+    def __init__(self, connection: RDBMSConnector, **kwargs):
         """Create a new DatasourceRetrieverOperator."""
         super().__init__(**kwargs)
         self._connection = connection