How to use

setStatementDescribed

method

in

org.postgresql.core.v3.SimpleQuery

private void sendDescribeStatement(SimpleQuery query, SimpleParameterList params,
  boolean describeOnly) throws IOException {
 // Send Statement Describe
 LOGGER.log(Level.FINEST, " FE=> Describe(statement={0})", query.getStatementName());
 byte[] encodedStatementName = query.getEncodedStatementName();
 // Total size = 4 (size field) + 1 (describe type, 'S') + N + 1 (portal name)
 int encodedSize = 4 + 1 + (encodedStatementName == null ? 0 : encodedStatementName.length) + 1;
 pgStream.sendChar('D'); // Describe
 pgStream.sendInteger4(encodedSize); // Message size
 pgStream.sendChar('S'); // Describe (Statement);
 if (encodedStatementName != null) {
  pgStream.send(encodedStatementName); // Statement name
 }
 pgStream.sendChar(0); // end message
 // Note: statement name can change over time for the same query object
 // Thus we take a snapshot of the query name
 pendingDescribeStatementQueue.add(
   new DescribeRequest(query, params, describeOnly, query.getStatementName()));
 pendingDescribePortalQueue.add(query);
 query.setStatementDescribed(true);
 query.setPortalDescribed(true);
}

private void sendDescribeStatement(SimpleQuery query, SimpleParameterList params, boolean describeOnly) throws IOException {
  // Send Statement Describe
  if (logger.logDebug())
  {
    logger.debug(" FE=> Describe(statement=" + query.getStatementName()+")");
  }
  byte[] encodedStatementName = query.getEncodedStatementName();
  // Total size = 4 (size field) + 1 (describe type, 'S') + N + 1 (portal name)
  int encodedSize = 4 + 1 + (encodedStatementName == null ? 0 : encodedStatementName.length) + 1;
  pgStream.SendChar('D');                     // Describe
  pgStream.SendInteger4(encodedSize);         // Message size
  pgStream.SendChar('S');                     // Describe (Statement);
  if (encodedStatementName != null)
    pgStream.Send(encodedStatementName);    // Statement name
  pgStream.SendChar(0);                       // end message
  pendingDescribeStatementQueue.add(new Object[]{query, params, new Boolean(describeOnly), query.getStatementName()});
  pendingDescribePortalQueue.add(query);
  query.setStatementDescribed(true);
  query.setPortalDescribed(true);
}

DescribeRequest request = pendingDescribeStatementQueue.removeFirst();
LOGGER.log(Level.FINEST, " FE marking setStatementDescribed(false) for query {0}", request.query);
request.query.setStatementDescribed(false);

private void sendDescribeStatement(SimpleQuery query, SimpleParameterList params, boolean describeOnly) throws IOException {
  // Send Statement Describe
  if (logger.logDebug())
  {
    logger.debug(" FE=> Describe(statement=" + query.getStatementName()+")");
  }
  byte[] encodedStatementName = query.getEncodedStatementName();
  // Total size = 4 (size field) + 1 (describe type, 'S') + N + 1 (portal name)
  int encodedSize = 4 + 1 + (encodedStatementName == null ? 0 : encodedStatementName.length) + 1;
  pgStream.SendChar('D');                     // Describe
  pgStream.SendInteger4(encodedSize);         // Message size
  pgStream.SendChar('S');                     // Describe (Statement);
  if (encodedStatementName != null)
    pgStream.Send(encodedStatementName);    // Statement name
  pgStream.SendChar(0);                       // end message
  pendingDescribeStatementQueue.add(new Object[]{query, params, new Boolean(describeOnly), query.getStatementName()});
  pendingDescribePortalQueue.add(query);
  query.setStatementDescribed(true);
  query.setPortalDescribed(true);
}

private void sendDescribeStatement(SimpleQuery query, SimpleParameterList params, boolean describeOnly) throws IOException {
  // Send Statement Describe
  if (logger.logDebug())
  {
    logger.debug(" FE=> Describe(statement=" + query.getStatementName()+")");
  }
  byte[] encodedStatementName = query.getEncodedStatementName();
  // Total size = 4 (size field) + 1 (describe type, 'S') + N + 1 (portal name)
  int encodedSize = 4 + 1 + (encodedStatementName == null ? 0 : encodedStatementName.length) + 1;
  pgStream.SendChar('D');                     // Describe
  pgStream.SendInteger4(encodedSize);         // Message size
  pgStream.SendChar('S');                     // Describe (Statement);
  if (encodedStatementName != null)
    pgStream.Send(encodedStatementName);    // Statement name
  pgStream.SendChar(0);                       // end message
  pendingDescribeStatementQueue.add(new Object[]{query, params, new Boolean(describeOnly), query.getStatementName()});
  pendingDescribePortalQueue.add(query);
  query.setStatementDescribed(true);
  query.setPortalDescribed(true);
}