Examples with Connection com.google.cloud.bigquery.Connection used on opensource projects

Example 6 with Connection

use of com.google.cloud.bigquery.Connection in project java-bigquery by googleapis.

the class ITBigQueryTest method testBQResultSetPagination.

@Test
public void testBQResultSetPagination() throws SQLException {
    String query = "SELECT date, county, state_name, confirmed_cases, deaths FROM " + TABLE_ID_LARGE.getTable() + " where date is not null and county is not null and state_name is not null order by date limit 300000";
    ConnectionSettings connectionSettings = ConnectionSettings.newBuilder().setDefaultDataset(DatasetId.of(DATASET)).setNumBufferedRows(// page size
    10000).build();
    Connection connection = bigquery.createConnection(connectionSettings);
    BigQueryResult bigQueryResult = connection.executeSelect(query);
    ResultSet rs = bigQueryResult.getResultSet();
    int cnt = 0;
    while (rs.next()) {
        // pagination starts after approx 120,000 records
        assertNotNull(rs.getDate(0));
        assertNotNull(rs.getString(1));
        assertNotNull(rs.getString(2));
        assertTrue(rs.getInt(3) >= 0);
        assertTrue(rs.getInt(4) >= 0);
        ++cnt;
    }
    // total 300000 rows should be read
    assertEquals(300000, cnt);
}

Example 7 with Connection

use of com.google.cloud.bigquery.Connection in project java-bigquery by googleapis.

the class ITBigQueryTest method testBQResultSetMultiThreadedOrder.

@Test
public // to the multithreaded BigQueryResult implementation
void testBQResultSetMultiThreadedOrder() throws SQLException {
    String query = "SELECT date FROM " + TABLE_ID_LARGE.getTable() + " where date is not null order by date asc limit 300000";
    ConnectionSettings connectionSettings = ConnectionSettings.newBuilder().setDefaultDataset(DatasetId.of(DATASET)).setNumBufferedRows(// page size
    10000).build();
    Connection connection = bigquery.createConnection(connectionSettings);
    BigQueryResult bigQueryResult = connection.executeSelect(query);
    ResultSet rs = bigQueryResult.getResultSet();
    int cnt = 0;
    assertTrue(rs.next());
    ++cnt;
    java.sql.Date lastDate = rs.getDate(0);
    while (rs.next()) {
        assertNotNull(rs.getDate(0));
        // sorted order is maintained
        assertTrue(rs.getDate(0).getTime() >= lastDate.getTime());
        lastDate = rs.getDate(0);
        ++cnt;
    }
    // total 300000 rows should be read
    assertEquals(300000, cnt);
}

Example 8 with Connection

use of com.google.cloud.bigquery.Connection in project java-bigquery by googleapis.

the class ITBigQueryTest method testCreateDefaultConnection.

// Ref: https://github.com/googleapis/java-bigquery/issues/2070. Adding a pre-submit test to see
// if bigquery.createConnection() returns null
@Test
public void testCreateDefaultConnection() throws BigQuerySQLException {
    Connection connection = bigquery.createConnection();
    assertNotNull("bigquery.createConnection() returned null", connection);
    assertTrue(connection.close());
}

Example 9 with Connection

use of com.google.cloud.bigquery.Connection in project java-bigquery by googleapis.

the class ITBigQueryTest method testExecuteSelectDefaultConnectionSettings.

@Test
public void testExecuteSelectDefaultConnectionSettings() throws SQLException {
    // Use the default connection settings
    Connection connection = bigquery.createConnection();
    String query = "SELECT corpus FROM `bigquery-public-data.samples.shakespeare` GROUP BY corpus;";
    BigQueryResult bigQueryResult = connection.executeSelect(query);
    assertEquals(42, bigQueryResult.getTotalRows());
}

Example 10 with Connection

use of com.google.cloud.bigquery.Connection in project java-bigquery by googleapis.

the class ITBigQueryTest method testBQResultSetPaginationSlowQuery.

@Test
public void testBQResultSetPaginationSlowQuery() throws SQLException {
    String query = "SELECT date, county, state_name, confirmed_cases, deaths FROM " + TABLE_ID_LARGE.getTable() + " where date is not null and county is not null and state_name is not null order by date limit 300000";
    ConnectionSettings connectionSettings = ConnectionSettings.newBuilder().setDefaultDataset(DatasetId.of(DATASET)).setNumBufferedRows(// page size
    10000).setJobTimeoutMs(// So that ConnectionImpl.isFastQuerySupported returns false, and the slow
    15000L).build();
    Connection connection = bigquery.createConnection(connectionSettings);
    BigQueryResult bigQueryResult = connection.executeSelect(query);
    ResultSet rs = bigQueryResult.getResultSet();
    int cnt = 0;
    while (rs.next()) {
        // pagination starts after approx 120,000 records
        assertNotNull(rs.getDate(0));
        assertNotNull(rs.getString(1));
        assertNotNull(rs.getString(2));
        assertTrue(rs.getInt(3) >= 0);
        assertTrue(rs.getInt(4) >= 0);
        ++cnt;
    }
    // total 300000 rows should be read
    assertEquals(300000, cnt);
}