int nisam_update(register N_INFO *info, const byte *oldrec, const byte *newrec) { int flag,key_changed,save_errno; reg3 ulong pos; uint i,length; uchar old_key[N_MAX_KEY_BUFF],*new_key; DBUG_ENTER("nisam_update"); LINT_INIT(save_errno); if (!(info->update & HA_STATE_AKTIV)) { my_errno=HA_ERR_KEY_NOT_FOUND; DBUG_RETURN(-1); } if (info->s->base.options & HA_OPTION_READ_ONLY_DATA) { my_errno=EACCES; DBUG_RETURN(-1); } pos=info->lastpos; #ifndef NO_LOCKING if (_nisam_readinfo(info,F_WRLCK,1)) DBUG_RETURN(-1); #endif if ((*info->s->compare_record)(info,oldrec)) { save_errno=my_errno; goto err_end; /* Record has changed */ } if (info->s->state.key_file_length >= info->s->base.max_key_file_length - info->s->blocksize* INDEX_BLOCK_MARGIN *info->s->state.keys) { save_errno=HA_ERR_INDEX_FILE_FULL; goto err_end; } /* Flyttar de element i isamfilen som m}ste flyttas */ new_key=info->lastkey+info->s->base.max_key_length; key_changed=HA_STATE_KEY_CHANGED; /* We changed current database */ /* Remove key that didn't change */ for (i=0 ; i < info->s->state.keys ; i++) { length=_nisam_make_key(info,i,new_key,newrec,pos); if (length != _nisam_make_key(info,i,old_key,oldrec,pos) || memcmp((byte*) old_key,(byte*) new_key,length)) { if ((int) i == info->lastinx) key_changed|=HA_STATE_WRITTEN; /* Mark that keyfile changed */ if (_nisam_ck_delete(info,i,old_key)) goto err; if (_nisam_ck_write(info,i,new_key)) goto err; } } if ((*info->s->update_record)(info,pos,newrec)) goto err; info->update= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED | HA_STATE_AKTIV | key_changed); nisam_log_record(LOG_UPDATE,info,newrec,info->lastpos,0); VOID(_nisam_writeinfo(info,test(key_changed))); allow_break(); /* Allow SIGHUP & SIGINT */ DBUG_RETURN(0); err: DBUG_PRINT("error",("key: %d errno: %d",i,my_errno)); save_errno=my_errno; if (my_errno == HA_ERR_FOUND_DUPP_KEY || my_errno == HA_ERR_RECORD_FILE_FULL) { info->errkey= (int) i; flag=0; do { length=_nisam_make_key(info,i,new_key,newrec,pos); if (length != _nisam_make_key(info,i,old_key,oldrec,pos) || memcmp((byte*) old_key,(byte*) new_key,length)) { if ((flag++ && _nisam_ck_delete(info,i,new_key)) || _nisam_ck_write(info,i,old_key)) break; } } while (i-- != 0); } info->update= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED | HA_STATE_AKTIV | key_changed); err_end: nisam_log_record(LOG_UPDATE,info,newrec,info->lastpos,save_errno); VOID(_nisam_writeinfo(info,1)); allow_break(); /* Allow SIGHUP & SIGINT */ my_errno=(save_errno == HA_ERR_KEY_NOT_FOUND) ? HA_ERR_CRASHED : save_errno; DBUG_RETURN(-1); } /* nisam_update */
int nisam_write(N_INFO *info, const byte *record) { uint i; ulong filepos; uchar *buff; DBUG_ENTER("nisam_write"); DBUG_PRINT("enter",("isam: %d data: %d",info->s->kfile,info->dfile)); if (info->s->base.options & HA_OPTION_READ_ONLY_DATA) { my_errno=EACCES; DBUG_RETURN(-1); } #ifndef NO_LOCKING if (_nisam_readinfo(info,F_WRLCK,1)) DBUG_RETURN(-1); #endif dont_break(); /* Dont allow SIGHUP or SIGINT */ #if !defined(NO_LOCKING) && defined(USE_RECORD_LOCK) if (!info->locked && my_lock(info->dfile,F_WRLCK,0L,F_TO_EOF, MYF(MY_SEEK_NOT_DONE) | info->lock_wait)) goto err; #endif filepos= ((info->s->state.dellink != NI_POS_ERROR) ? info->s->state.dellink : info->s->state.data_file_length); if (info->s->base.reloc == 1L && info->s->base.records == 1L && info->s->state.records == 1L) { /* System file */ my_errno=HA_ERR_RECORD_FILE_FULL; goto err2; } if (info->s->state.key_file_length >= info->s->base.max_key_file_length - info->s->blocksize* INDEX_BLOCK_MARGIN *info->s->state.keys) { my_errno=HA_ERR_INDEX_FILE_FULL; goto err2; } /* Write all keys to indextree */ buff=info->lastkey+info->s->base.max_key_length; for (i=0 ; i < info->s->state.keys ; i++) { VOID(_nisam_make_key(info,i,buff,record,filepos)); if (_nisam_ck_write(info,i,buff)) goto err; } if ((*info->s->write_record)(info,record)) goto err; info->update= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED |HA_STATE_AKTIV | HA_STATE_WRITTEN); info->s->state.records++; info->lastpos=filepos; nisam_log_record(LOG_WRITE,info,record,filepos,0); VOID(_nisam_writeinfo(info,1)); allow_break(); /* Allow SIGHUP & SIGINT */ DBUG_RETURN(0); err: if (my_errno == HA_ERR_FOUND_DUPP_KEY || my_errno == HA_ERR_RECORD_FILE_FULL) { info->errkey= (int) i; while ( i-- > 0) { VOID(_nisam_make_key(info,i,buff,record,filepos)); if (_nisam_ck_delete(info,i,buff)) break; } } info->update=(HA_STATE_CHANGED | HA_STATE_ROW_CHANGED | HA_STATE_WRITTEN); err2: nisam_log_record(LOG_WRITE,info,record,filepos,my_errno); VOID(_nisam_writeinfo(info,1)); allow_break(); /* Allow SIGHUP & SIGINT */ DBUG_RETURN(-1); } /* nisam_write */