Function create_full_part_field_array

sql/sql_partition.cc:463–534

*/

static bool create_full_part_field_array(THD *thd, TABLE *table,
                                         partition_info *part_info)
{
  bool result= FALSE;
  Field **ptr;
  my_bitmap_map *bitmap_buf;
  DBUG_ENTER("create_full_part_field_array");

  if (!part_info->is_sub_partitioned())
  {
    part_info->full_part_field_array= part_info->part_field_array;
    part_info->num_full_part_fields= part_info->num_part_fields;
  }
  else
  {
    Field *field, **field_array;
    uint num_part_fields=0;
    ptr= table->field;
    while ((field= *(ptr++)))
    {
      if (field->flags & FIELD_IN_PART_FUNC_FLAG)
        num_part_fields++;
    }
    field_array= thd->calloc<Field*>(num_part_fields + 1);
    if (unlikely(!field_array))
    {
      result= TRUE;
      goto end;
    }
    num_part_fields= 0;
    ptr= table->field;
    while ((field= *(ptr++)))
    {
      if (field->flags & FIELD_IN_PART_FUNC_FLAG)
        field_array[num_part_fields++]= field;
    }
    field_array[num_part_fields]=0;
    part_info->full_part_field_array= field_array;
    part_info->num_full_part_fields= num_part_fields;
  }

  /*
    Initialize the set of all fields used in partition and subpartition
    expression. Required for testing of partition fields in write_set
    when updating. We need to set all bits in read_set because the row
    may need to be inserted in a different [sub]partition.
  */
  if (!(bitmap_buf= (my_bitmap_map*)
        thd->alloc(bitmap_buffer_size(table->s->fields))))
  {
    result= TRUE;
    goto end;
  }
  if (unlikely(my_bitmap_init(&part_info->full_part_field_set, bitmap_buf,
                              table->s->fields)))
  {
    result= TRUE;
    goto end;