JDBC query

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Run a query by using JDBC.

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

Code sample


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

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

public class SingleUseReadOnlyExample {

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

  static void singleUseReadOnly(String projectId, String instanceId, String databaseId)
      throws SQLException {
    String connectionUrl =
            projectId, instanceId, databaseId);
    try (Connection connection = DriverManager.getConnection(connectionUrl);
        Statement statement = connection.createStatement()) {
      // When the connection is in autocommit mode, any query that is executed will automatically
      // be executed using a single-use read-only transaction, even if the connection itself is in
      // read/write mode.
      try (ResultSet rs =
              "SELECT SingerId, FirstName, LastName, Revenues FROM Singers ORDER BY LastName")) {
        while (rs.next()) {
              "%d %s %s %s%n",
              rs.getLong(1), rs.getString(2), rs.getString(3), rs.getBigDecimal(4));

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