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Viewing changes to storage/heap/hp_update.c

  • Committer: Monty Taylor
  • Date: 2008-08-02 00:06:32 UTC
  • mto: (236.1.42 codestyle)
  • mto: This revision was merged to the branch mainline in revision 261.
  • Revision ID: monty@inaugust.com-20080802000632-jsse0zdd9r6ic5ku
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storage/heap/hp_update.c
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/* Update current record in heap-database */
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#include "heap_priv.h"
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using namespace drizzled;
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int heap_update(HP_INFO *info, const unsigned char *old_record, const unsigned char *new_record)
 
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#include "heapdef.h"
 
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int heap_update(HP_INFO *info, const uchar *old, const uchar *heap_new)
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{
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  HP_KEYDEF *keydef, *end, *p_lastinx;
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  unsigned char *pos;
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  bool auto_key_changed= 0;
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  HP_SHARE *share= info->getShare();
 
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  uchar *pos;
 
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  my_bool auto_key_changed= 0;
 
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  HP_SHARE *share= info->s;
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  test_active(info);
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  pos=info->current_ptr;
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  if (info->opt_flag & READ_CHECK_USED && hp_rectest(info,old_record))
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    return(errno);                              /* Record changed */
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  if (info->opt_flag & READ_CHECK_USED)
 
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    return(my_errno);                           /* Record changed */
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  if (--(share->records) < share->blength >> 1) share->blength>>= 1;
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  share->changed=1;
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  p_lastinx= share->keydef + info->lastinx;
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  for (keydef= share->keydef, end= keydef + share->keys; keydef < end; keydef++)
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  {
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    if (hp_rec_key_cmp(keydef, old_record, new_record, 0))
 
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    if (hp_rec_key_cmp(keydef, old, heap_new, 0))
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    {
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      if (hp_delete_key(info, keydef, old_record, pos, keydef == p_lastinx) ||
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          hp_write_key(info, keydef, new_record, pos))
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      {
 
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      if ((*keydef->delete_key)(info, keydef, old, pos, keydef == p_lastinx) ||
 
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          (*keydef->write_key)(info, keydef, heap_new, pos))
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        goto err;
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      }
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      if (share->auto_key == (uint) (keydef - share->keydef + 1))
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        auto_key_changed= 1;
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    }
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  }
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  hp_copy_record_data_to_chunkset(share, new_record, pos);
 
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  memcpy(pos,heap_new,(size_t) share->reclength);
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  if (++(share->records) == share->blength) share->blength+= share->blength;
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  if (auto_key_changed)
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    heap_update_auto_increment(info, new_record);
 
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    heap_update_auto_increment(info, heap_new);
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  return(0);
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 err:
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  if (errno == HA_ERR_FOUND_DUPP_KEY)
 
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  if (my_errno == HA_ERR_FOUND_DUPP_KEY)
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  {
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    info->errkey = (int) (keydef - share->keydef);
 
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    if (keydef->algorithm == HA_KEY_ALG_BTREE)
 
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    {
 
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      /* we don't need to delete non-inserted key from rb-tree */
 
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      if ((*keydef->write_key)(info, keydef, old, pos))
 
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      {
 
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        if (++(share->records) == share->blength)
 
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          share->blength+= share->blength;
 
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        return(my_errno);
 
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      }
 
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      keydef--;
 
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    }
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    while (keydef >= share->keydef)
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    {
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      if (hp_rec_key_cmp(keydef, old_record, new_record, 0))
 
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      if (hp_rec_key_cmp(keydef, old, heap_new, 0))
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      {
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        if (hp_delete_key(info, keydef, new_record, pos, 0) ||
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            hp_write_key(info, keydef, old_record, pos))
 
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        if ((*keydef->delete_key)(info, keydef, heap_new, pos, 0) ||
 
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            (*keydef->write_key)(info, keydef, old, pos))
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          break;
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      }
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      keydef--;
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    }
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  }
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  if (++(share->records) == share->blength)
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    share->blength+= share->blength;
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  return(errno);
 
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  return(my_errno);
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} /* heap_update */