How to use

isDerivedColumn

method

in

org.apache.shardingsphere.core.parsing.parser.constant.DerivedColumn

@Override
public int getColumnCount() throws SQLException {
  int result = 0;
  for (int columnIndex = 1; columnIndex <= resultSetMetaData.getColumnCount(); columnIndex++) {
    if (!DerivedColumn.isDerivedColumn(resultSetMetaData.getColumnLabel(columnIndex))) {
      result++;
    }
  }
  return result;
}

private QueryResponsePackets getQueryResponsePacketsWithoutDerivedColumns(final QueryResponsePackets queryResponsePackets) {
  Collection<ColumnDefinition41Packet> columnDefinition41Packets = new ArrayList<>(queryResponsePackets.getColumnCount());
  int columnCount = 0;
  for (ColumnDefinition41Packet each : queryResponsePackets.getColumnDefinition41Packets()) {
    if (!DerivedColumn.isDerivedColumn(each.getName())) {
      columnDefinition41Packets.add(each);
      columnCount++;
    }
  }
  FieldCountPacket fieldCountPacket = new FieldCountPacket(1, columnCount);
  return new QueryResponsePackets(fieldCountPacket, columnDefinition41Packets, new EofPacket(columnCount + 2));
}

private PostgreSQLQueryResponsePackets getQueryResponsePacketsWithoutDerivedColumns(final PostgreSQLQueryResponsePackets postgreSQLQueryResponsePackets) {
  int columnCount = 0;
  List<PostgreSQLColumnDescription> postgreSQLColumnDescriptions = new ArrayList<>(postgreSQLQueryResponsePackets.getColumnCount());
  for (PostgreSQLColumnDescription each : postgreSQLQueryResponsePackets.getPostgreSQLRowDescriptionPacket().getPostgreSQLColumnDescriptions()) {
    if (!DerivedColumn.isDerivedColumn(each.getColumnName())) {
      postgreSQLColumnDescriptions.add(each);
      columnCount++;
    }
  }
  return new PostgreSQLQueryResponsePackets(new PostgreSQLRowDescriptionPacket(columnCount, postgreSQLColumnDescriptions));
}