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

Example 1 with DBReader

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

the class DatabasePortObject method getDataTable.

/**
 * @return underlying data
 */
private DataTable getDataTable(final int cacheNoRows) {
    try {
        DatabaseQueryConnectionSettings connSettings = getConnectionSettings(m_credentials);
        DBReader load = connSettings.getUtility().getReader(connSettings);
        return load.getTable(new ExecutionMonitor(), m_credentials, false, cacheNoRows);
    } catch (Throwable t) {
        LOGGER.error("Could not fetch data from database, reason: " + t.getMessage(), t);
        return null;
    }
}

Example 2 with DBReader

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

the class DBPivotNodeModel method createDbOutSpec.

/**
 * @param inSpec Spec of the input database object
 * @param exec The {@link ExecutionMonitor}
 * @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) throws InvalidSettingsException, CanceledExecutionException {
    DatabaseQueryConnectionSettings connectionSettings = inSpec.getConnectionSettings(getCredentialsProvider());
    final StatementManipulator statementManipulator = connectionSettings.getUtility().getStatementManipulator();
    try {
        // Connection connection = connectionSettings.createConnection(getCredentialsProvider());
        String newQuery = createQuery(connectionSettings, inSpec.getDataTableSpec(), exec);
        connectionSettings = createDBQueryConnection(inSpec, newQuery);
        DatabaseQueryConnectionSettings querySettings = new DatabaseQueryConnectionSettings(connectionSettings, newQuery);
        DBReader reader = querySettings.getUtility().getReader(querySettings);
        DataTableSpec tableSpec;
        exec.setMessage("Retrieving result specification.");
        tableSpec = reader.getDataTableSpec(getCredentialsProvider());
        return new DatabasePortObjectSpec(tableSpec, connectionSettings.createConnectionModel());
    } catch (SQLException e1) {
        throw new InvalidSettingsException("Failure during query generation. Error: " + e1.getMessage(), e1);
    }
}

Example 3 with DBReader

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

the class SQLInjectNodeModel method execute.

/**
 * {@inheritDoc}
 */
@Override
protected PortObject[] execute(final PortObject[] inData, final ExecutionContext exec) throws Exception {
    exec.setMessage("Retrieving metadata from database");
    final String varName = m_flowVariableName.getStringValue();
    if (varName == null) {
        throw new InvalidSettingsException("No flow variable for the SQL statement selected");
    }
    final String sql = peekFlowVariableString(varName);
    if (sql == null) {
        throw new InvalidSettingsException("The selected flow variable is not assigned");
    }
    DatabaseConnectionPortObject dbIn = (DatabaseConnectionPortObject) inData[0];
    DatabaseConnectionSettings inSettings = dbIn.getConnectionSettings(getCredentialsProvider());
    // Attach the SQL query
    DatabaseQueryConnectionSettings outSettings = new DatabaseQueryConnectionSettings(inSettings, sql);
    // Probe the database to see how the result table looks like
    DBReader load = outSettings.getUtility().getReader(outSettings);
    DataTableSpec tableSpec = load.getDataTableSpec(getCredentialsProvider());
    DatabasePortObjectSpec outSpec = new DatabasePortObjectSpec(tableSpec, outSettings.createConnectionModel());
    return new PortObject[] { new DatabasePortObject(outSpec) };
}

Example 4 with DBReader

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

the class DBNumericBinnerNodeModel method createDatabasePortObjectSpec.

private DatabasePortObjectSpec createDatabasePortObjectSpec(DatabaseQueryConnectionSettings connectionSettings, final DatabasePortObjectSpec inDatabasePortObjectSpec, final DBBinnerMaps binnerMaps) throws InvalidSettingsException, SQLException, BadPaddingException, IllegalBlockSizeException, InvalidKeyException, IOException {
    final StatementManipulator statementManipulator = connectionSettings.getUtility().getStatementManipulator();
    final String newQuery = createQuery(connectionSettings.getQuery(), statementManipulator, inDatabasePortObjectSpec.getDataTableSpec(), binnerMaps);
    connectionSettings = createDBQueryConnection(inDatabasePortObjectSpec, newQuery);
    final DatabaseQueryConnectionSettings querySettings = new DatabaseQueryConnectionSettings(connectionSettings, newQuery);
    DBReader reader = querySettings.getUtility().getReader(querySettings);
    DataTableSpec outDataTableSpec = reader.getDataTableSpec(getCredentialsProvider());
    DatabasePortObjectSpec outDatabasePortObjectSpec = new DatabasePortObjectSpec(outDataTableSpec, connectionSettings.createConnectionModel());
    return outDatabasePortObjectSpec;
}

Example 5 with DBReader

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

the class DBTableSelectorNodeModel method configure.

/**
 * {@inheritDoc}
 */
@Override
protected PortObjectSpec[] configure(final PortObjectSpec[] inSpecs) throws InvalidSettingsException {
    if ((m_settings.getQuery() == null) || m_settings.getQuery().isEmpty()) {
        throw new InvalidSettingsException("No query configured");
    }
    DatabaseConnectionPortObjectSpec incomingConnection = (DatabaseConnectionPortObjectSpec) inSpecs[0];
    DatabaseConnectionSettings connSettings = incomingConnection.getConnectionSettings(getCredentialsProvider());
    String sql = FlowVariableResolver.parse(m_settings.getQuery(), this);
    DatabaseQueryConnectionSettings querySettings = new DatabaseQueryConnectionSettings(connSettings, sql);
    final DBReader conn = connSettings.getUtility().getReader(querySettings);
    if (!connSettings.getRetrieveMetadataInConfigure()) {
        return new PortObjectSpec[1];
    }
    try {
        DataTableSpec tableSpec = conn.getDataTableSpec(getCredentialsProvider());
        return new PortObjectSpec[] { new DatabasePortObjectSpec(tableSpec, querySettings) };
    } catch (SQLException ex) {
        Throwable cause = ExceptionUtils.getRootCause(ex);
        if (cause == null) {
            cause = ex;
        }
        throw new InvalidSettingsException("Error while validating SQL query '" + sql + "' : " + cause.getMessage(), ex);
    }
}