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5886090182
myisammrg/ |
Makefile.am |
mymrgdef.h | support for keys
myrg_open.c | &
myrg_queue.c | bugfixes
myrg_rfirst.c |
myrg_rkey.c |
myrg_rlast.c |
myrg_rnext.c |
myrg_rprev.c |
myrg_rrnd.c |
include/myisammrg.h | rkey/rnext/etc prototyped
sql/ |
ha_myisammrg.cc | support for keys
ha_myisammrg.h |
myisam/ |
mi_rkey.c | buf==NULL extension, _mi_rkey()
mi_rnext.c |
mi_rprev.c |
include/queues.h | reinit_queue() - same as init_queue, but w/o malloc
mysys/queues.c |
PART II: Miscellaneous
myisam/common_words | deleted (looks like I checked it in by mistake)
some files (like acconfig.h, Makefile.am, COPYING.LIB, etc)
| Change mode to -rw-r--r-- (by `chmod a-x ')
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "mymrgdef.h"
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/*
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Read next row with the same key as previous read
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*/
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int myrg_rnext(MYRG_INFO *info, byte *buf, int inx)
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{
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MYRG_TABLE *table;
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MI_INFO *mi;
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uchar *key_buff;
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uint pack_key_length;
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int err;
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/* at first, do rnext for the table found before */
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err=mi_rnext(info->current_table->table,NULL,inx);
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if (err == HA_ERR_END_OF_FILE)
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{
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queue_remove(&(info->by_key),0);
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if (!info->by_key.elements)
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return HA_ERR_END_OF_FILE;
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}
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else if (err)
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return err;
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else
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{
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/* Found here, adding to queue */
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queue_top(&(info->by_key))=(byte *)(info->current_table);
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queue_replaced(&(info->by_key));
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}
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/* next, let's finish myrg_rkey's initial scan */
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table=info->last_used_table+1;
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if (table < info->end_table)
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{
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mi=info->last_used_table->table;
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key_buff=mi->lastkey+mi->s->base.max_key_length;
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pack_key_length=mi->last_rkey_length;
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for (; table < info->end_table ; table++)
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{
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mi=table->table;
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err=_mi_rkey(mi,NULL,inx,key_buff,pack_key_length,HA_READ_KEY_OR_NEXT,FALSE);
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info->last_used_table=table;
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if (err == HA_ERR_KEY_NOT_FOUND)
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continue;
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if (err)
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return err;
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/* Found here, adding to queue */
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queue_insert(&(info->by_key),(byte *)table);
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}
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}
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/* now, mymerge's read_next is as simple as one queue_top */
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mi=(info->current_table=(MYRG_TABLE *)queue_top(&(info->by_key)))->table;
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return mi_rrnd(mi,buf,mi->lastpos);
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}
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