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-rw-r--r--storage/myisammrg/myrg_rlast.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/storage/myisammrg/myrg_rlast.c b/storage/myisammrg/myrg_rlast.c
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index 00000000..d9402568
--- /dev/null
+++ b/storage/myisammrg/myrg_rlast.c
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+/* Copyright (c) 2000, 2001, 2003, 2005-2007 MySQL AB
+ Use is subject to license terms
+
+ 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; version 2 of the License.
+
+ 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+#include "myrg_def.h"
+
+ /* Read last row with the same key as the previous read. */
+
+int myrg_rlast(MYRG_INFO *info, uchar *buf, int inx)
+{
+ MYRG_TABLE *table;
+ MI_INFO *mi;
+ int err;
+
+ if (_myrg_init_queue(info,inx, HA_READ_KEY_OR_PREV))
+ return my_errno;
+
+ for (table=info->open_tables ; table < info->end_table ; table++)
+ {
+ if ((err=mi_rlast(table->table,NULL,inx)))
+ {
+ if (err == HA_ERR_END_OF_FILE)
+ continue;
+ return err;
+ }
+ /* adding to queue */
+ queue_insert(&(info->by_key),(uchar *)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);
+}
+