pgvector examples for Raku
Follow the instructions for your database library:
Enable the extension
$dbh.execute('CREATE EXTENSION IF NOT EXISTS vector');Create a table
$dbh.execute('CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3))');Insert vectors
my $embedding1 = '[1,1,1]';
my $embedding2 = '[2,2,2]';
my $embedding3 = '[1,1,2]';
$dbh.execute('INSERT INTO items (embedding) VALUES (?), (?), (?)', $embedding1, $embedding2, $embedding3);Get the nearest neighbors
my $embedding = '[1,1,1]';
.say for $dbh.execute('SELECT * FROM items ORDER BY embedding <-> ? LIMIT 5', $embedding).allrows();Add an approximate index
$dbh.execute('CREATE INDEX ON items USING hnsw (embedding vector_l2_ops)');
# or
$dbh.execute('CREATE INDEX ON items USING ivfflat (embedding vector_l2_ops) WITH (lists = 100)');Use vector_ip_ops for inner product and vector_cosine_ops for cosine distance
See a full example
Enable the extension
$pg.query('CREATE EXTENSION IF NOT EXISTS vector');Create a table
$pg.query('CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3))');Insert vectors
my $embedding1 = '[1,1,1]';
my $embedding2 = '[2,2,2]';
my $embedding3 = '[1,1,2]';
$pg.query('INSERT INTO items (embedding) VALUES ($1), ($2), ($3)', $embedding1, $embedding2, $embedding3);Get the nearest neighbors
my $embedding = '[1,1,1]';
.say for $pg.query('SELECT * FROM items ORDER BY embedding <-> $1 LIMIT 5', $embedding).arrays;Add an approximate index
$pg.query('CREATE INDEX ON items USING hnsw (embedding vector_l2_ops)');
# or
$pg.query('CREATE INDEX ON items USING ivfflat (embedding vector_l2_ops) WITH (lists = 100)');Use vector_ip_ops for inner product and vector_cosine_ops for cosine distance
See a full example
Everyone is encouraged to help improve this project. Here are a few ways you can help:
- Report bugs
- Fix bugs and submit pull requests
- Write, clarify, or fix documentation
- Suggest or add new features
To get started with development:
git clone https://github.com/pgvector/pgvector-raku.git
cd pgvector-raku
createdb pgvector_raku_test
zef install DBIish DB::Pg
raku dbiish.raku
raku dbpg.raku