Implement ClickHouse Support #3342
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| --- | ||
| sidebar_class_name: node-only | ||
| --- | ||
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| import CodeBlock from "@theme/CodeBlock"; | ||
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| # ClickHouse | ||
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| :::tip Compatibility | ||
| Only available on Node.js. | ||
| ::: | ||
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| [ClickHouse](https://clickhouse.com/) is a robust and open-source columnar database that is used for handling analytical queries and efficient storage, ClickHouse is designed to provide a powerful combination of vector search and analytics. | ||
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| ## Setup | ||
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| 1. Launch a ClickHouse cluster. Refer to the [ClickHouse Installation Guide](https://clickhouse.com/docs/en/getting-started/install/) for details. | ||
| 2. After launching a ClickHouse cluster, retrieve the `Connection Details` from the cluster's `Actions` menu. You will need the host, port, username, and password. | ||
| 3. Install the required Node.js peer dependency for ClickHouse in your workspace. | ||
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| ```bash npm2yarn | ||
| npm install -S @clickhouse/client | ||
| ``` | ||
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| ## Index and Query Docs | ||
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| import InsertExample from "@examples/indexes/vector_stores/clickhouse_fromTexts.ts"; | ||
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| <CodeBlock language="typescript">{InsertExample}</CodeBlock> | ||
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| ## Query Docs From an Existing Collection | ||
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| import SearchExample from "@examples/indexes/vector_stores/clickhouse_search.ts"; | ||
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| <CodeBlock language="typescript">{SearchExample}</CodeBlock> |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,34 @@ | ||
| import { ClickHouseStore } from "langchain/vectorstores/clickhouse"; | ||
| import { OpenAIEmbeddings } from "langchain/embeddings/openai"; | ||
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| // Initialize ClickHouse store from texts | ||
| const vectorStore = await ClickHouseStore.fromTexts( | ||
| ["Hello world", "Bye bye", "hello nice world"], | ||
| [ | ||
| { id: 2, name: "2" }, | ||
| { id: 1, name: "1" }, | ||
| { id: 3, name: "3" }, | ||
| ], | ||
| new OpenAIEmbeddings(), | ||
| { | ||
| host: process.env.CLICKHOUSE_HOST || "localhost", | ||
| port: process.env.CLICKHOUSE_PORT || 8443, | ||
| username: process.env.CLICKHOUSE_USER || "username", | ||
| password: process.env.CLICKHOUSE_PASSWORD || "password", | ||
| database: process.env.CLICKHOUSE_DATABASE || "default", | ||
| table: process.env.CLICKHOUSE_TABLE || "vector_table", | ||
| } | ||
| ); | ||
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| // Sleep 1 second to ensure that the search occurs after the successful insertion of data. | ||
| await new Promise((resolve) => setTimeout(resolve, 1000)); | ||
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| // Perform similarity search without filtering | ||
| const results = await vectorStore.similaritySearch("hello world", 1); | ||
| console.log(results); | ||
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| // Perform similarity search with filtering | ||
| const filteredResults = await vectorStore.similaritySearch("hello world", 1, { | ||
| whereStr: "metadata.name = '1'", | ||
| }); | ||
| console.log(filteredResults); | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,28 @@ | ||
| import { ClickHouseStore } from "langchain/vectorstores/clickhouse"; | ||
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There was a problem hiding this comment. This comment is flagging the addition of code that accesses environment variables via |
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| import { OpenAIEmbeddings } from "langchain/embeddings/openai"; | ||
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| // Initialize ClickHouse store | ||
| const vectorStore = await ClickHouseStore.fromExistingIndex( | ||
| new OpenAIEmbeddings(), | ||
| { | ||
| host: process.env.CLICKHOUSE_HOST || "localhost", | ||
| port: process.env.CLICKHOUSE_PORT || 8443, | ||
| username: process.env.CLICKHOUSE_USER || "username", | ||
| password: process.env.CLICKHOUSE_PASSWORD || "password", | ||
| database: process.env.CLICKHOUSE_DATABASE || "default", | ||
| table: process.env.CLICKHOUSE_TABLE || "vector_table", | ||
| } | ||
| ); | ||
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| // Sleep 1 second to ensure that the search occurs after the successful insertion of data. | ||
| await new Promise((resolve) => setTimeout(resolve, 1000)); | ||
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| // Perform similarity search without filtering | ||
| const results = await vectorStore.similaritySearch("hello world", 1); | ||
| console.log(results); | ||
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| // Perform similarity search with filtering | ||
| const filteredResults = await vectorStore.similaritySearch("hello world", 1, { | ||
| whereStr: "metadata.name = '1'", | ||
| }); | ||
| console.log(filteredResults); | ||
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This comment is flagging the addition of code that explicitly accesses environment variables via
process.envin the diff. Maintainers should review this change to ensure proper handling of environment variables.