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plugin/myisam/mi_rprev.cc
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  MYISAM_SHARE *share=info->s;
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  if ((inx = _mi_check_index(info,inx)) < 0)
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    return(my_errno);
 
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    return(errno);
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  flag=SEARCH_SMALLER;                          /* Read previous */
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  if (info->lastpos == HA_OFFSET_ERROR && info->update & HA_STATE_NEXT_FOUND)
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    flag=0;                                     /* Read last */
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  if (fast_mi_readinfo(info))
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    return(my_errno);
 
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    return(errno);
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  changed=_mi_test_if_changed(info);
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  if (share->concurrent_insert)
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    pthread_rwlock_rdlock(&share->key_root_lock[inx]);
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  info->update|= HA_STATE_PREV_FOUND;
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  if (error)
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  {
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    if (my_errno == HA_ERR_KEY_NOT_FOUND)
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      my_errno=HA_ERR_END_OF_FILE;
 
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    if (errno == HA_ERR_KEY_NOT_FOUND)
 
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      errno=HA_ERR_END_OF_FILE;
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  }
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  else if (!buf)
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  {
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    return(info->lastpos==HA_OFFSET_ERROR ? my_errno : 0);
 
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    return(info->lastpos==HA_OFFSET_ERROR ? errno : 0);
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  }
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  else if (!(*info->read_record)(info,info->lastpos,buf))
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  {
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    info->update|= HA_STATE_AKTIV;              /* Record is read */
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    return(0);
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  }
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  return(my_errno);
 
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  return(errno);
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} /* mi_rprev */