This is the implementation of the Weaviate for MindsDB.

Weaviate is an open-source vector database. It allows you to store data objects and vector embeddings from your favorite ML-models, and scale seamlessly into billions of data objects.

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Prerequisites

Before proceeding, ensure the following prerequisites are met:

  1. Install MindsDB locally via Docker or use MindsDB Cloud.
  2. To connect Weaviate to MindsDB, install the required dependencies following this instruction.
  3. Install or ensure access to Weaviate.

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Implementation

This handler uses weaviate-client python library connect to a weaviate instance.

The required arguments to establish a connection are:

  • weaviate_url: url of the weaviate database
  • weaviate_api_key: API key to authenticate with weaviate (in case of cloud instance).
  • persistence_directory: directory to be used in case of local storage

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Creating connection

In order to make use of this handler and connect to a Weaviate server in MindsDB, the following syntax can be used:

CREATE DATABASE weaviate_datasource
            WITH ENGINE = "weaviate",
            PARAMETERS = {
                "weaviate_url" : "https://sample.weaviate.network",
                "weaviate_api_key": "api-key"
};

CREATE DATABASE weaviate_datasource
            WITH ENGINE = "weaviate",
            PARAMETERS = {
                "weaviate_url" : "https://localhost:8080",
};

CREATE DATABASE weaviate_datasource
            WITH ENGINE = "weaviate",
            PARAMETERS = {
                "persistence_directory" : "db_path",
};

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Dropping connection

To drop the connection, use this command

DROP DATABASE weaviate_datasource;

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Creating tables

To insert data from a pre-existing table, use CREATE

CREATE TABLE weaviate_datascource.test
(SELECT * FROM sqlitedb.test);

As weaviate currently doesn’t support json field. So, this creates another table for the “metadata” field and a reference is created in the original table which points to its metadata entry.

Weaviate follows GraphQL conventions where classes (which are table schemas) start with a capital letter and properties start with a lowercase letter.

So whenever we create a table, the table’s name gets capitalized.

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Dropping collections

To drop a Weaviate table use this command

DROP TABLE weaviate_datasource.tablename;

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Querying and selecting

To query database using a search vector, you can use search_vector or embeddings in WHERE clause

SELECT * from weaviate_datasource.test
WHERE search_vector = '[3.0, 1.0, 2.0, 4.5]'
LIMIT 10;

Basic query

SELECT * from weaviate_datasource.test

You can use WHERE clause on dynamic fields like normal SQL

SELECT * FROM weaviate_datasource.createtest
WHERE category = "science";

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Deleting records

You can delete entries using DELETE just like in SQL.

DELETE FROM weaviate_datasource.test
WHERE id IN (1, 2, 3);

Update is not supported by mindsdb vector database