from langchain.indexes import VectorstoreIndexCreator  report errors ""
Labels: name: area: doc loader, name: area: vector store, name: auto:bug

### System Info

python version: 3.11
I'm trying to run the sampe code "LangChain: Q&A over Documents", but when I run the below cell, it reports below error 
```
pip install --upgrade langchain
from llm_commons.langchain.btp_llm import ChatBTPOpenAI
from llm_commons.langchain.btp_llm import BTPOpenAIEmbeddings
from langchain.chains import RetrievalQA
from langchain.document_loaders import CSVLoader
from langchain.vectorstores import DocArrayInMemorySearch
from IPython.display import display, Markdown
file = 'OutdoorClothingCatalog_1000.csv'
loader = CSVLoader(file_path=file, encoding='utf-8')

from langchain.indexes import VectorstoreIndexCreator

```
ImportError                               Traceback (most recent call last)
Cell In[4], line 1
----> 1 from langchain.indexes import VectorstoreIndexCreator

File /opt/conda/lib/python3.11/site-packages/langchain/indexes/__init__.py:17
      1 """Code to support various indexing workflows.
      2 
      3 Provides code to:
   (...)
     14 documents that were derived from parent documents by chunking.)
     15 """
     16 from langchain.indexes._api import IndexingResult, aindex, index
---> 17 from langchain.indexes._sql_record_manager import SQLRecordManager
     18 from langchain.indexes.graph import GraphIndexCreator
     19 from langchain.indexes.vectorstore import VectorstoreIndexCreator
File /opt/conda/lib/python3.11/site-packages/langchain/indexes/_sql_record_manager.py:21
     18 import uuid
     19 from typing import Any, AsyncGenerator, Dict, Generator, List, Optional, Sequence, Union
---> 21 from sqlalchemy import (
     22     URL,
     23     Column,
     24     Engine,
     25     Float,
     26     Index,
     27     String,
     28     UniqueConstraint,
     29     and_,
     30     create_engine,
     31     delete,
     32     select,
     33     text,
     34 )
     35 from sqlalchemy.ext.asyncio import (
     36     AsyncEngine,
     37     AsyncSession,
     38     async_sessionmaker,
     39     create_async_engine,
     40 )
     41 from sqlalchemy.ext.declarative import declarative_base

ImportError: cannot import name 'URL' from 'sqlalchemy' (/opt/conda/lib/python3.11/site-packages/sqlalchemy/__init__.py)


### Who can help?

_No response_

### Information

- [ ] The official example notebooks/scripts
- [ ] My own modified scripts

### Related Components

- [ ] LLMs/Chat Models
- [ ] Embedding Models
- [ ] Prompts / Prompt Templates / Prompt Selectors
- [ ] Output Parsers
- [ ] Document Loaders
- [ ] Vector Stores / Retrievers
- [ ] Memory
- [ ] Agents / Agent Executors
- [ ] Tools / Toolkits
- [X] Chains
- [ ] Callbacks/Tracing
- [ ] Async

### Reproduction

python version: 3.11
I'm trying to run the sampe code "LangChain: Q&A over Documents", but when I run the below cell, it reports below error 
```
pip install --upgrade langchain
from llm_commons.langchain.btp_llm import ChatBTPOpenAI
from llm_commons.langchain.btp_llm import BTPOpenAIEmbeddings
from langchain.chains import RetrievalQA
from langchain.document_loaders import CSVLoader
from langchain.vectorstores import DocArrayInMemorySearch
from IPython.display import display, Markdown
file = 'OutdoorClothingCatalog_1000.csv'
loader = CSVLoader(file_path=file, encoding='utf-8')

from langchain.indexes import VectorstoreIndexCreator

```
ImportError                               Traceback (most recent call last)
Cell In[4], line 1
----> 1 from langchain.indexes import VectorstoreIndexCreator

File /opt/conda/lib/python3.11/site-packages/langchain/indexes/__init__.py:17
      1 """Code to support various indexing workflows.
      2 
      3 Provides code to:
   (...)
     14 documents that were derived from parent documents by chunking.)
     15 """
     16 from langchain.indexes._api import IndexingResult, aindex, index
---> 17 from langchain.indexes._sql_record_manager import SQLRecordManager
     18 from langchain.indexes.graph import GraphIndexCreator
     19 from langchain.indexes.vectorstore import VectorstoreIndexCreator
File /opt/conda/lib/python3.11/site-packages/langchain/indexes/_sql_record_manager.py:21
     18 import uuid
     19 from typing import Any, AsyncGenerator, Dict, Generator, List, Optional, Sequence, Union
---> 21 from sqlalchemy import (
     22     URL,
     23     Column,
     24     Engine,
     25     Float,
     26     Index,
     27     String,
     28     UniqueConstraint,
     29     and_,
     30     create_engine,
     31     delete,
     32     select,
     33     text,
     34 )
     35 from sqlalchemy.ext.asyncio import (
     36     AsyncEngine,
     37     AsyncSession,
     38     async_sessionmaker,
     39     create_async_engine,
     40 )
     41 from sqlalchemy.ext.declarative import declarative_base

ImportError: cannot import name 'URL' from 'sqlalchemy' (/opt/conda/lib/python3.11/site-packages/sqlalchemy/__init__.py)


### Expected behavior

the import should work as expected
![image](https://github.com/langchain-ai/langchain/assets/6148167/6b027323-2598-4577-af80-65e2f90cfcf6)