JDBC connection with query options

Set connection query options by using JDBC.

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For detailed documentation that includes this code sample, see the following:

Code sample

Java

To learn how to install and use the client library for Cloud Spanner, see Cloud Spanner client libraries.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

class ConnectionWithQueryOptionsExample {

  static void connectionWithQueryOptions() throws SQLException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "my-project";
    String instanceId = "my-instance";
    String databaseId = "my-database";
    connectionWithQueryOptions(projectId, instanceId, databaseId);
  }

  static void connectionWithQueryOptions(String projectId, String instanceId, String databaseId)
      throws SQLException {
    String optimizerVersion = "1";
    String connectionUrl =
        String.format(
            "jdbc:cloudspanner:/projects/%s/instances/%s/databases/%s?optimizerVersion=%s",
            projectId, instanceId, databaseId, optimizerVersion);
    try (Connection connection = DriverManager.getConnection(connectionUrl);
        Statement statement = connection.createStatement()) {
      // Execute a query using the optimizer version '1'.
      try (ResultSet rs =
          statement.executeQuery(
              "SELECT SingerId, FirstName, LastName FROM Singers ORDER BY LastName")) {
        while (rs.next()) {
          System.out.printf("%d %s %s%n", rs.getLong(1), rs.getString(2), rs.getString(3));
        }
      }
      try (ResultSet rs = statement.executeQuery("SHOW VARIABLE OPTIMIZER_VERSION")) {
        while (rs.next()) {
          System.out.printf("Optimizer version: %s%n", rs.getString(1));
        }
      }
    }
  }
}

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