bool QueryOperation::pushResultForTable()

in jones-ndb/impl/src/ndb/QueryOperation.cpp [168:208]

• 32 lines of code
• 9 McCabe index (conditional complexity)

bool QueryOperation::pushResultForTable(short level) {
  QueryBuffer & current = buffers[level];
  QueryBuffer & parent = buffers[current.parent];

  if(level == 0)                            // reset flags for new root result
    for(int i = 0 ; i < this->size ; i++)
      buffers[i].result_flags = buffers[i].static_flags;

  /* Push NULL result, or skip if parent was also NULL */
  if(ndbQuery->getQueryOperation(level)->isRowNULL())
  {
    current.result_flags |= flag_row_is_null;
    if(parent.result_flags & flag_row_is_null)
    {
      DEBUG_PRINT("table %d SKIP -- parent is null", level);
      return true;   /* skip */
    }
    return pushResultNull(level);
  }

  if(isDuplicate(level))
  {
    DEBUG_PRINT("table %d SKIP DUPLICATE", level);
    return true;  /* skip */
  }

  bool ok = pushResultValue(level);

  /* Finally compare the entire row against all previous values,
     unless it is the very first row.
  */
  if(ok && (int) nresults > size) {
    if(compareRowToAllPrevious()) {
      int r = nresults - 1;
      DEBUG_PRINT("table %d PRUNE LAST RESULT", results[r].sector);
      results[r].tag |= flag_row_is_duplicate;
      free(results[r].data);
    }
  }
  return ok;
}