How to use

sendSync

method

in

org.postgresql.core.v3.QueryExecutorImpl

sendSync();
processResults(resultHandler, flags);
estimatedReceiveBufferBytes = 0;

sendOneQuery(beginTransactionQuery, SimpleQuery.NO_PARAMETERS, 0, 0,
  QueryExecutor.QUERY_NO_METADATA);
sendSync();
processResults(handler, 0);
estimatedReceiveBufferBytes = 0;

if (disallowBatching || queryCount >= MAX_BUFFERED_QUERIES)
  sendSync();
  processResults(trackingHandler, flags);
  if (disallowBatching || queryCount >= MAX_BUFFERED_QUERIES)
    sendSync();
    processResults(trackingHandler, flags);

pgStream.sendChar(0);
pgStream.flush();
sendSync(); // send sync message

 sendSync();
sendSync();
processResults(handler, flags);
estimatedReceiveBufferBytes = 0;

sendSync();
processResults(handler, 0);

sendSync();

public synchronized void fetch(ResultCursor cursor, ResultHandler handler, int fetchSize)
  throws SQLException {
 waitOnLock();
 final Portal portal = (Portal) cursor;
 // Insert a ResultHandler that turns bare command statuses into empty datasets
 // (if the fetch returns no rows, we see just a CommandStatus..)
 final ResultHandler delegateHandler = handler;
 handler = new ResultHandlerDelegate(delegateHandler) {
  public void handleCommandStatus(String status, int updateCount, long insertOID) {
   handleResultRows(portal.getQuery(), null, new ArrayList<byte[][]>(), null);
  }
 };
 // Now actually run it.
 try {
  processDeadParsedQueries();
  processDeadPortals();
  sendExecute(portal.getQuery(), portal, fetchSize);
  sendSync();
  processResults(handler, 0);
  estimatedReceiveBufferBytes = 0;
 } catch (IOException e) {
  abort();
  handler.handleError(
    new PSQLException(GT.tr("An I/O error occurred while sending to the backend."),
      PSQLState.CONNECTION_FAILURE, e));
 }
 handler.handleCompletion();
}

queryCount = 0;
sendQuery((V3Query)query, (V3ParameterList)parameters, maxRows, fetchSize, flags, trackingHandler);
sendSync();
processResults(handler, flags);
sendSync();
processResults(handler, flags);
handler.handleError(new PSQLException(GT.tr("Unable to bind parameter values for statement."), PSQLState.INVALID_PARAMETER_VALUE, se.getIOException()));

pgStream.SendChar(0);
pgStream.flush();
sendSync();     // send sync message

sendSync();

sendSync();
processResults(handler, flags);

if (queryCount >= MAX_BUFFERED_QUERIES)
  sendSync();
  processResults(trackingHandler, flags);
  if (queryCount >= MAX_BUFFERED_QUERIES)
    sendSync();
    processResults(trackingHandler, flags);

if (disallowBatching || queryCount >= MAX_BUFFERED_QUERIES)
  sendSync();
  processResults(trackingHandler, flags);
  if (disallowBatching || queryCount >= MAX_BUFFERED_QUERIES)
    sendSync();
    processResults(trackingHandler, flags);

sendSync();
processResults(handler, 0);

sendSync();
processResults(handler, 0);

sendSync();

sendSync();

sendSync();
processResults(handler, flags);

sendSync();
processResults(handler, flags);