Re-add Support for SQLAlchemy <1.4

Support for SQLAlchemy 1.3 was removed in version 0.0.203 by change langchain-ai#6086. Re-adding support.

langchain/vectorstores/analyticdb.py

@@ -7,7 +7,6 @@
 
 from sqlalchemy import REAL, Column, String, Table, create_engine, insert, text
 from sqlalchemy.dialects.postgresql import ARRAY, JSON, TEXT
-from sqlalchemy.engine import Row
 
 try:
     from sqlalchemy.orm import declarative_base
@@ -59,6 +58,14 @@ def __init__(
         self.logger = logger or logging.getLogger(__name__)
         self.__post_init__()
 
+        try:
+            from sqlalchemy.engine import Row
+        except ImportError:
+            raise ImportError(
+                "Could not import Row from sqlalchemy.engine. "
+                "Please 'pip install sqlalchemy>=1.4'."
+            )
+
     def __post_init__(
         self,
     ) -> None: