Examples with DatabaseReaderConnection org.knime.core.node.port.database.DatabaseReaderConnection used on opensource projects

Example 1 with DatabaseReaderConnection

use of org.knime.core.node.port.database.DatabaseReaderConnection in project knime-core by knime.

the class DBGroupByNodeModel method createOutSpec.

/**
 * @param inSpec Spec of the input table
 * @param checkRetrieveMetadata
 * @return Spec of the output table
 * @throws InvalidSettingsException if settings do not match the input specification
 */
private DataTableSpec createOutSpec(final DataTableSpec inSpec, final DatabaseConnectionSettings settings, final String query, final boolean ignoreExceptions) throws InvalidSettingsException {
    // Try get spec from database
    try {
        DatabaseQueryConnectionSettings querySettings = new DatabaseQueryConnectionSettings(settings, query);
        DatabaseReaderConnection conn = new DatabaseReaderConnection(querySettings);
        return conn.getDataTableSpec(getCredentialsProvider());
    } catch (SQLException e) {
        NodeLogger.getLogger(getClass()).info("Could not determine table spec from database, trying to guess now", e);
        if (!ignoreExceptions) {
            throw new InvalidSettingsException("Error in automatically build sql statement: " + e.getMessage());
        }
    // Otherwise guess spec
    }
    List<DataColumnSpec> colSpecs = new ArrayList<>();
    // Add all group by columns
    for (String col : m_groupByCols.getIncludeList()) {
        colSpecs.add(inSpec.getColumnSpec(col));
    }
    // Add aggregated columns
    for (int i = 0; i < m_aggregatedColumns.length; i++) {
        String col = m_aggregatedColumns[i];
        String method = m_aggregationMethods[i];
        if (inSpec.getColumnSpec(col) == null) {
            throw new InvalidSettingsException("Column '" + col + "' in aggregation " + method + " does not exist");
        }
        final DatabaseUtility databaseUtility = settings.getUtility();
        final DBAggregationFunction function = databaseUtility.getAggregationFunction(method);
        // Get type of column after aggregation
        DataType type = function.getType(inSpec.getColumnSpec(col).getType());
        colSpecs.add(new DataColumnSpecCreator(generateColumnName(col, method), type).createSpec());
    }
    return new DataTableSpec(colSpecs.toArray(new DataColumnSpec[colSpecs.size()]));
}

Example 2 with DatabaseReaderConnection

use of org.knime.core.node.port.database.DatabaseReaderConnection in project knime-core by knime.

the class DBSamplingNodeModel method createDbOutSpec.

/**
 * @param inSpec Spec of the input database object
 * @param exec The {@link ExecutionMonitor}
 * @param checkRetrieveMetadata true if the retrieveMetadataInConfigure settings should be respected,
 *            <code>false</code> if the metadata should be retrieved in any case (for execute)
 * @return Spec of the output database object
 * @throws InvalidSettingsException if the current settings are invalid
 * @throws CanceledExecutionException if execution is canceled
 */
private DatabasePortObjectSpec createDbOutSpec(final DatabasePortObjectSpec inSpec, final ExecutionMonitor exec, final boolean checkRetrieveMetadata) throws InvalidSettingsException, CanceledExecutionException {
    final DatabaseQueryConnectionSettings connectionSettings = inSpec.getConnectionSettings(getCredentialsProvider());
    final StatementManipulator statementManipulator = connectionSettings.getUtility().getStatementManipulator();
    try {
        // Connection connection = connectionSettings.createConnection(getCredentialsProvider());
        final String newQuery = connectionSettings.execute(getCredentialsProvider(), conn -> {
            return createQuery(conn, connectionSettings.getQuery(), statementManipulator, inSpec.getDataTableSpec(), exec);
        });
        DatabaseQueryConnectionSettings resultSettings = createDBQueryConnection(inSpec, newQuery);
        DatabaseQueryConnectionSettings querySettings = new DatabaseQueryConnectionSettings(resultSettings, newQuery);
        DatabaseReaderConnection conn = new DatabaseReaderConnection(querySettings);
        DataTableSpec tableSpec;
        exec.setMessage("Retrieving result specification.");
        tableSpec = conn.getDataTableSpec(getCredentialsProvider());
        return new DatabasePortObjectSpec(tableSpec, resultSettings.createConnectionModel());
    } catch (SQLException e1) {
        throw new InvalidSettingsException("Failure during query generation. Error: " + e1.getMessage(), e1);
    }
}

Example 3 with DatabaseReaderConnection

use of org.knime.core.node.port.database.DatabaseReaderConnection in project knime-core by knime.

the class DBAutoBinnerNodeModel method createDatabasePortObject.

private DatabasePortObject createDatabasePortObject(final DatabasePortObjectSpec inSpec, DatabaseQueryConnectionSettings connectionSettings, final PMMLPortObject pmmlPortObject) throws InvalidSettingsException {
    final StatementManipulator statementManipulator = connectionSettings.getUtility().getStatementManipulator();
    String newQuery = createQuery(connectionSettings.getQuery(), statementManipulator, inSpec.getDataTableSpec(), pmmlPortObject);
    connectionSettings = createDBQueryConnection(inSpec, newQuery);
    DatabaseQueryConnectionSettings querySettings = new DatabaseQueryConnectionSettings(connectionSettings, newQuery);
    DatabaseReaderConnection conn = new DatabaseReaderConnection(querySettings);
    DatabasePortObjectSpec databasePortObjectSpec = null;
    try {
        databasePortObjectSpec = new DatabasePortObjectSpec(conn.getDataTableSpec(getCredentialsProvider()), connectionSettings.createConnectionModel());
    } catch (SQLException e) {
        throw new InvalidSettingsException("Failure during query generation. Error: " + e.getMessage());
    }
    DatabasePortObject databasePortObject = new DatabasePortObject(databasePortObjectSpec);
    return databasePortObject;
}