Method GetSortIndex

storage/connect/array.cpp:792–823

/ Sort and return the sort index. */ Note: This is meant if the array contains unique values. */ Returns Index.Memp if Ok or NULL in case of error. */ /

/*  Returns Index.Memp if Ok or NULL in case of error.                 */
/***********************************************************************/
void *ARRAY::GetSortIndex(PGLOBAL g)
  {
  // Prepare non conservative sort with offet values
  Index.Size = Nval * sizeof(int);

  if (!PlgDBalloc(g, NULL, Index))
    goto error;

  Offset.Size = (Nval + 1) * sizeof(int);

  if (!PlgDBalloc(g, NULL, Offset))
    goto error;

  // Call the sort program, it returns the number of distinct values
  Ndif = Qsort(g, Nval);

  if (Ndif < 0)
    goto error;

  if (Ndif < Nval)
    goto error;

  PlgDBfree(Offset);
  return Index.Memp;

 error:
  Nval = Ndif = 0;
  Valblk->Free();
  PlgDBfree(Index);
  PlgDBfree(Offset);
  return NULL;
  } // end of GetSortIndex

/***********************************************************************/
/*  Block filter testing for IN operator on Column/Array operands.     */