myisammrg::index_next_same

myisammrg/Makefile.am:
  myrg_rnext_same.c added

1 files changed, 40 insertions, 0 deletions

diff --git a/myisammrg/myrg_rnext_same.c b/myisammrg/myrg_rnext_same.c
new file mode 100644
index 00000000000..b569459b77d
--- /dev/null
+++ b/myisammrg/myrg_rnext_same.c
@@ -0,0 +1,40 @@
+/* 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"
+
+int myrg_rnext_same(MYRG_INFO *info, byte *buf)
+{
+  uint err;
+  MI_INFO *mi;
+
+  if (!info->current_table)
+    return (HA_ERR_KEY_NOT_FOUND);
+
+  err=mi_rnext_same(info->current_table->table,buf);
+  if (err == HA_ERR_END_OF_FILE)
+  {
+    queue_remove(&(info->by_key),0);
+    if (!info->by_key.elements)
+      return HA_ERR_END_OF_FILE;
+
+    mi=(info->current_table=(MYRG_TABLE *)queue_top(&(info->by_key)))->table;
+    mi->once_flags|= RRND_PRESERVE_LASTINX;
+    return mi_rrnd(mi,buf,mi->lastpos);
+  }
+  return err;
+}
+