summaryrefslogtreecommitdiff
path: root/storage/myisammrg/myrg_rfirst.c
diff options
context:
space:
mode:
Diffstat (limited to 'storage/myisammrg/myrg_rfirst.c')
-rw-r--r--storage/myisammrg/myrg_rfirst.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/storage/myisammrg/myrg_rfirst.c b/storage/myisammrg/myrg_rfirst.c
new file mode 100644
index 00000000000..9ba07686c47
--- /dev/null
+++ b/storage/myisammrg/myrg_rfirst.c
@@ -0,0 +1,49 @@
+/* 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 */
+
+#include "myrg_def.h"
+
+ /* Read first row according to specific key */
+
+int myrg_rfirst(MYRG_INFO *info, byte *buf, int inx)
+{
+ MYRG_TABLE *table;
+ MI_INFO *mi;
+ int err;
+
+ if (_myrg_init_queue(info,inx,HA_READ_KEY_OR_NEXT))
+ return my_errno;
+
+ for (table=info->open_tables ; table != info->end_table ; table++)
+ {
+ if ((err=mi_rfirst(table->table,NULL,inx)))
+ {
+ if (err == HA_ERR_END_OF_FILE)
+ continue;
+ return err;
+ }
+ /* adding to queue */
+ queue_insert(&(info->by_key),(byte *)table);
+ }
+ /* We have done a read in all tables */
+ info->last_used_table=table;
+
+ if (!info->by_key.elements)
+ return HA_ERR_END_OF_FILE;
+
+ mi=(info->current_table=(MYRG_TABLE *)queue_top(&(info->by_key)))->table;
+ return _myrg_mi_read_record(mi,buf);
+}