dont error on sql import (#4647)

this makes it so we dont throw errors when importing langchain when
sqlalchemy==1.3.1

we dont really want to support 1.3.1 (seems like unneccessary maintance
cost) BUT we would like it to not terribly error should someone decide
to run on it

langchain/memory/chat_message_histories/sql.py

@@ -3,7 +3,8 @@
 from typing import List
 
 from sqlalchemy import Column, Integer, Text, create_engine
-from sqlalchemy.orm import declarative_base, sessionmaker
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
 
 from langchain.schema import (
     AIMessage,

langchain/sql_database.py

@@ -13,7 +13,7 @@
     select,
     text,
 )
-from sqlalchemy.engine import CursorResult, Engine
+from sqlalchemy.engine import Engine
 from sqlalchemy.exc import ProgrammingError, SQLAlchemyError
 from sqlalchemy.schema import CreateTable
 
@@ -196,7 +196,7 @@ def _get_sample_rows(self, table: Table) -> str:
         try:
             # get the sample rows
             with self._engine.connect() as connection:
-                sample_rows_result: CursorResult = connection.execute(command)
+                sample_rows_result = connection.execute(command)  # type: ignore
                 # shorten values in the sample rows
                 sample_rows = list(
                     map(lambda ls: [str(i)[:100] for i in ls], sample_rows_result)

langchain/vectorstores/analyticdb.py

@@ -8,7 +8,8 @@
 import sqlalchemy
 from sqlalchemy import REAL, Index
 from sqlalchemy.dialects.postgresql import ARRAY, JSON, UUID
-from sqlalchemy.orm import Session, declarative_base, relationship
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import Session, relationship
 from sqlalchemy.sql.expression import func
 
 from langchain.docstore.document import Document