From 38057f0d2e13288f42f289ad2347989486d513bb Mon Sep 17 00:00:00 2001
From: Hao Chen <haoch@users.noreply.github.com>
Date: Sun, 18 Jun 2023 17:34:53 -0700
Subject: [PATCH] Fix latest clickhouse vector schema change  (#6385)

<!--
Thank you for contributing to LangChain! Your PR will appear in our
release under the title you set. Please make sure it highlights your
valuable contribution.

Replace this with a description of the change, the issue it fixes (if
applicable), and relevant context. List any dependencies required for
this change.

After you're done, someone will review your PR. They may suggest
improvements. If no one reviews your PR within a few days, feel free to
@-mention the same people again, as notifications can get lost.

Finally, we'd love to show appreciation for your contribution - if you'd
like us to shout you out on Twitter, please also include your handle!
-->

Fixes https://github.com/hwchase17/langchain/issues/6208

<!-- Remove if not applicable -->

Fixes # (issue)

#### Before submitting

<!-- If you're adding a new integration, please include:

1. a test for the integration - favor unit tests that does not rely on
network access.
2. an example notebook showing its use


See contribution guidelines for more information on how to write tests,
lint
etc:


https://github.com/hwchase17/langchain/blob/master/.github/CONTRIBUTING.md
-->

#### Who can review?

Tag maintainers/contributors who might be interested:

<!-- For a quicker response, figure out the right person to tag with @

  @hwchase17 - project lead

  Tracing / Callbacks
  - @agola11

  Async
  - @agola11

  DataLoaders
  - @eyurtsev

  Models
  - @hwchase17
  - @agola11

  Agents / Tools / Toolkits
  - @hwchase17

  VectorStores / Retrievers / Memory
  - @dev2049

 -->

 VectorStores / Retrievers / Memory
  - @dev2049
---
 langchain/vectorstores/clickhouse.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/langchain/vectorstores/clickhouse.py b/langchain/vectorstores/clickhouse.py
index ed179c8b00..62c3a94328 100644
--- a/langchain/vectorstores/clickhouse.py
+++ b/langchain/vectorstores/clickhouse.py
@@ -68,7 +68,7 @@ class ClickhouseSettings(BaseSettings):
 
     index_type: str = "annoy"
     # Annoy supports L2Distance and cosineDistance.
-    index_param: Optional[Union[List, Dict]] = [100, "'L2Distance'"]
+    index_param: Optional[Union[List, Dict]] = ["'L2Distance'", 100]
     index_query_params: Dict[str, str] = {}
 
     column_map: Dict[str, str] = {