diff options
Diffstat (limited to 'myisammrg/myrg_queue.c')
| -rw-r--r-- | myisammrg/myrg_queue.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/myisammrg/myrg_queue.c b/myisammrg/myrg_queue.c new file mode 100644 index 00000000000..47ccdce1554 --- /dev/null +++ b/myisammrg/myrg_queue.c @@ -0,0 +1,52 @@ +/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + +/* Read record based on a key */ + +#include "mymrgdef.h" + +static int queue_key_cmp(void *keyseg, byte *a, byte *b) +{ + MI_INFO *aa=((MYRG_TABLE *)a)->table; + MI_INFO *bb=((MYRG_TABLE *)b)->table; + uint not_used; + + return (_mi_key_cmp((MI_KEYSEG *)keyseg, aa->lastkey, bb->lastkey, + USE_WHOLE_KEY, SEARCH_FIND, ¬_used)); +} /* queue_key_cmp */ + +int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag) +{ + QUEUE *q=&(info->by_key); + + if (!q->root) + { + if (init_queue(q,info->tables, 0, + (myisam_read_vec[search_flag]==SEARCH_SMALLER), + queue_key_cmp, + info->open_tables->table->s->keyinfo[inx].seg)) + return my_errno; + } + else + { + if (reinit_queue(q,info->tables, 0, + (myisam_read_vec[search_flag]==SEARCH_SMALLER), + queue_key_cmp, + info->open_tables->table->s->keyinfo[inx].seg)) + return my_errno; + } +} + |