R2dbcVectorDemo.java

R2dbcVectorDemo.java

/*
  Copyright (c) 2024, Oracle and/or its affiliates.

  This software is dual-licensed to you under the Universal Permissive License
  (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl or Apache License
  2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
  either license.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

     https://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

package com.oracle.dev.jdbc.r2dbc;

import java.sql.SQLException;

import io.r2dbc.spi.ConnectionFactory;
import oracle.sql.VECTOR;
import reactor.core.publisher.Mono;

public class R2dbcVectorDemo {

  public static void main(String[] args) {
    try {
      R2dbcVectorDemo demo = new R2dbcVectorDemo();
      demo.testConnection();
      demo.insertVector();
      demo.retrieveVector();
    } catch (SQLException e) {
      e.printStackTrace();
    }
    // Gives time for the async ops to complete
    Mono.never().block();
  }

  private void testConnection() {
    Mono.from(connectionFactory.create())
        .flatMapMany(connection -> connection.createStatement("SELECT 1 FROM DUAL").execute())
        .flatMap(result -> result.map((row, metadata) -> row.get(0, Integer.class))).subscribe(System.out::println);
  }

  private void insertVector() throws SQLException {
    float[] embeddingArray = new float[] { 1.0f, 2.0f, 3.0f };
    VECTOR vectorValue = VECTOR.ofFloat32Values(embeddingArray);
    String insertQuery = new StringBuilder("INSERT INTO ").append(DatabaseConfig.getUser()).append(".")
        .append(DatabaseConfig.getDbTableName()).append(" (id, embedding) VALUES (:id, :embedding)").toString();
    Mono.from(connectionFactory.create())
        .flatMap(connection -> Mono
            .from(connection.createStatement(insertQuery).bind("id", 1).bind("embedding", vectorValue).execute())
            .then(Mono.from(connection.commitTransaction())))
        .subscribe();
  }

  private void retrieveVector() {
    String selectQuery = new StringBuilder("SELECT id, embedding FROM ").append(DatabaseConfig.getUser()).append(".")
        .append(DatabaseConfig.getDbTableName()).append(" WHERE id = :id").toString();
    Mono.from(connectionFactory.create())
        .flatMapMany(connection -> connection.createStatement(selectQuery).bind("id", 1).execute())
        .flatMap(result -> result.map((row, metadata) -> {
          Integer id = row.get("id", Integer.class);
          float[] vector = row.get("embedding", float[].class);
          return "ID: " + id + ", Vector: [" + vector[0] + ", " + vector[1] + ", " + vector[2] + "]";
        })).subscribe(System.out::println);
  }

  public R2dbcVectorDemo() {
    this.connectionFactory = DatabaseConfig.getConnectionFactory();
  }

  private ConnectionFactory connectionFactory;

}