feat(datasource):add oceanbase support (#1622)

Co-authored-by: csunny <cfqsunny@163.com>
Co-authored-by: aries_ckt <916701291@qq.com>

dbgpt/datasource/rdbms/conn_oceanbase.py

@@ -0,0 +1,37 @@
+"""Ocean base connect."""
+
+import logging
+
+from dbgpt.datasource.rdbms.base import RDBMSConnector
+
+logger = logging.getLogger(__name__)
+
+
+class OceanBaseConnect(RDBMSConnector):
+    """Connect Oceanbase Database fetch MetaData.
+
+    Args:
+    Usage:
+    """
+
+    db_type: str = "oceanbase"
+    db_dialect: str = "mysql"
+    driver: str = "mysql+ob"
+
+    default_db = ["information_schema", "performance_schema", "sys", "mysql"]
+
+    def get_users(self):
+        """Get_users."""
+        return []
+
+    def get_grants(self):
+        """Get_grants."""
+        return []
+
+    def get_collation(self):
+        """Get collation."""
+        return "UTF-8"
+
+    def get_charset(self):
+        """Get_charset."""
+        return "UTF-8"