Abstract
In this short article, we'll test the ability of SingleStoreDB to store and query the OpenAI Wikipedia Vector Database dataset. We'll see that SingleStoreDB can manage this dataset with ease. SingleStoreDB has supported a range of vector functions for some time, and these functions are ideally suited for modern applications using GPT technology.
The notebook file used in this article is available on GitHub.
Introduction
In several previous articles, we have used some of the vector capabilities built into SingleStoreDB:
- Quick tip: SingleStoreDB's EUCLIDEAN_DISTANCE and JSON_ARRAY_PACK functions
- Using SingleStore, Spark and Alternating Least Squares (ALS) to build a Movie Recommender System
In this short article, we'll test the JSON_ARRAY_PACK and DOT_PRODUCT vector functions with the OpenAI Wikipedia Vector Database dataset.
There is an OpenAI notebook available on GitHub under an MIT License that tests several Vector Database systems. The tests can be run using local clients or in the cloud. In this article, we'll use a local installation of SingleStoreDB.
Install SingleStoreDB
In this article, we'll install SingleStoreDB in a Virtual Machine (VM) environment. It takes just a few minutes. A previous article described the steps. Alternatively, we could use a Docker image.
For this article, we'll only need two tarball files for a VM installation:
Assuming a two-node cluster was correctly deployed and using the same variable names from the previous article, we can connect to our cluster from a MySQL CLI Client as follows:
mysql -u root -h ubuntu -P 3306 --default-auth=mysql_native_password -p
Once connected to our cluster, we'll create a new database, as follows:
CREATE DATABASE IF NOT EXISTS openai_demo;
Install Jupyter
From the command line, we'll install the classic Jupyter Notebook, as follows:
pip install notebook
OpenAI API Key
Before launching Jupyter, we must create an account on the OpenAI website. This provides some free credits. Since we will use embeddings, the cost will be minimal. We'll also need to create an OpenAI API Key. This can be created from USER > API keys in our OpenAI account.
From the command line, we'll export the OPENAI_API_KEY variable in our environment, as follows:
export OPENAI_API_KEY=<OpenAI API Key>
Replace <OpenAI API Key> with your key.
Next, we'll launch Jupyter, as follows:
jupyter notebook
Fill out the Notebook
Let's now create a new notebook. We'll adhere to the flow and structure of the OpenAI notebook and use some small code sections directly from the notebook, where required.
Setup
First, some libraries:
!pip install matplotlib
!pip install openai
!pip install plotly.express
!pip install scikit-learn
!pip install singlestoredb
!pip install tabulate
!pip install wget
Next, some imports:
import openai
import pandas as pd
import os
import wget
from ast import literal_eval
and then the embedding model:
EMBEDDING_MODEL = "text-embedding-ada-002"
Load Data
We'll now obtain the Wikipedia dataset:
embeddings_url = 'https://cdn.openai.com/API/examples/data/vector_database_wikipedia_articles_embedded.zip'
# The file is ~700 MB so this will take some time
wget.download(embeddings_url)
and unpack it:
import zipfile
with zipfile.ZipFile("vector_database_wikipedia_articles_embedded.zip", "r") as zip_ref:
zip_ref.extractall("data")
Next, we'll load the file into a Pandas Dataframe:
article_df = pd.read_csv(
"data/vector_database_wikipedia_articles_embedded.csv"
)
and we'll take a look at the first few lines, as follows:
article_df.head()
The next operation from the OpenAI notebook can take a while:
# Read vectors from strings back into a list
article_df['title_vector'] = article_df.title_vector.apply(literal_eval)
article_df['content_vector'] = article_df.content_vector.apply(literal_eval)
# Set vector_id to be a string
article_df['vector_id'] = article_df['vector_id'].apply(str)
and then next, we'll look at the Dataframe info:
article_df.info(show_counts=True)
The result should be as follows:
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 25000 entries, 0 to 24999
Data columns (total 7 columns):
# Column Non-Null Count Dtype
--- ------ -------------- -----
0 id 25000 non-null int64
1 url 25000 non-null object
2 title 25000 non-null object
3 text 25000 non-null object
4 title_vector 25000 non-null object
5 content_vector 25000 non-null object
6 vector_id 25000 non-null object
dtypes: int64(1), object(6)
Create Table
Let's now create a connection to our local installation of SingleStoreDB:
import singlestoredb as s2
conn = s2.connect("root:<password>@<host>:3306/openai_demo")
cur = conn.cursor()
We'll replace the values for <password> and <host> with the values that we used earlier at installation time.
We'll now create a table, as follows:
stmt = """
CREATE TABLE IF NOT EXISTS wikipedia (
id INT PRIMARY KEY,
url VARCHAR(255),
title VARCHAR(100),
text TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,
title_vector BLOB,
content_vector BLOB,
vector_id INT
)
"""
cur.execute(stmt)
Populate Table
We can populate our database table, as follows:
# Prepare the statement
stmt = """
INSERT INTO wikipedia (
id,
url,
title,
text,
title_vector,
content_vector,
vector_id
)
VALUES (
%s,
%s,
%s,
%s,
JSON_ARRAY_PACK_F64(%s),
JSON_ARRAY_PACK_F64(%s),
%s
)
"""
# Convert the DataFrame to a NumPy record array
record_arr = article_df.to_records(index=False)
# Set the batch size
batch_size = 1000
# Iterate over the rows of the record array in batches
for i in range(0, len(record_arr), batch_size):
batch = record_arr[i:i+batch_size]
values = [(
row[0],
row[1],
row[2],
row[3],
str(row[4]),
str(row[5]),
int(row[6])
) for row in batch]
cur.executemany(stmt, values)
We can also use JSON_ARRAY_PACK_F32 (32-bit, IEEE standard format), instead of JSON_ARRAY_PACK_F64 (64-bit, IEEE standard format).
Loading the data should take a short time. We can use other data loading methods, such as pipelines, for larger datasets.
Search Data
First, we'll import the following:
from openai.embeddings_utils import get_embedding
Next, we'll check that the OPENAI_API_KEY can be read, as follows:
if os.getenv("OPENAI_API_KEY") is not None:
openai.api_key = os.getenv("OPENAI_API_KEY")
print ("OPENAI_API_KEY is ready")
else:
print ("OPENAI_API_KEY environment variable not found")
We'll now define a Python function that will allow us to use either of the two vector columns in the database:
from typing import Tuple, List
def search_wikipedia(
query: str,
column1: str,
column2: str,
num_rows: int = 10
) -> Tuple[List[str], List[float]]:
"""Searches Wikipedia for the given query and returns the top `num_rows` results.
Args:
query: The query to search for.
column1: The name of the column in the Wikipedia database to return for each result.
column2: The name of the column in the Wikipedia database to use as the score for each result.
num_rows: The number of results to return.
Returns:
A list of the top `num_rows` results.
"""
# Get the embedding of the query
embedding = get_embedding(query, EMBEDDING_MODEL)
# Create the SQL statement
stmt = """
SELECT
{column1},
DOT_PRODUCT_F64(JSON_ARRAY_PACK_F64(%s), {column2}) AS score
FROM wikipedia
ORDER BY score DESC
LIMIT %s
""".format(column1=column1, column2=column2)
# Execute the SQL statement
cur.execute(stmt, [str(embedding), num_rows])
# Get the results
results = cur.fetchall()
# Separate the results into two lists
values = [row[0] for row in results]
scores = [row[1] for row in results]
# Return the results
return values, scores
We can test SingleStoreDB using the two examples in the OpenAI notebook. First, we'll use title and title_vector:
values1, scores1 = search_wikipedia(
query = "modern art in Europe",
column1 = "title",
column2 = "title_vector",
num_rows = 5
)
We'll format the results using the following:
from tabulate import tabulate
# Combine the values and scores lists into a list of tuples
# Each tuple contains a value and its corresponding score
table_data1 = list(zip(values1, scores1))
# Add a rank column to the table data
table_data1 = [(i + 1,) + data for i, data in enumerate(table_data1)]
# Create the table
table1 = tabulate(table_data1, headers=["Rank", "Title", "Score"])
# Print the table
print(table1)
The output should be similar to the following:
Rank Title Score
------ -------------------- --------
1 Museum of Modern Art 0.875081
2 Western Europe 0.867523
3 Renaissance art 0.864172
4 Pop art 0.860346
5 Northern Europe 0.854755
Next, we'll use text and content_vector:
values2, scores2 = search_wikipedia(
query = "Famous battles in Scottish history",
column1 = "text",
column2 = "content_vector",
num_rows = 5
)
We'll format the results using the following:
# Combine the values and scores lists into a list of tuples
# Each tuple contains a value and its corresponding score
table_data2 = list(zip([value[:50] for value in values2], scores2))
# Add a rank column to the table data
table_data2 = [(i + 1,) + data for i, data in enumerate(table_data2)]
# Create the table
table2 = tabulate(table_data2, headers=["Rank", "Text", "Score"])
# Print the table
print(table2)
The output should be similar to the following:
Rank Text Score
------ -------------------------------------------------- --------
1 The Battle of Bannockburn, fought on 23 and 24 Jun 0.869338
2 The Wars of Scottish Independence were a series of 0.86148
3 Events 0.852533
January 1 – Charles II crowned King of
4 The First War of Scottish Independence lasted from 0.849642
5 Robert I of Scotland (11 July 1274 – 7 June 1329) 0.846184
Summary
In this short article, we've seen that SingleStoreDB can store vectors with ease and that we can also store other data types in the same table, such as numeric and text. With its powerful SQL and multi-model support, SingleStoreDB provides a one-stop solution for modern applications bringing both technical and business benefits through a single product.
If you are interested in further reading, check out these SingleStore blog posts:
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