1 files changed, 51 insertions, 0 deletions
diff --git a/storage/myisammrg/myrg_rnext_same.c b/storage/myisammrg/myrg_rnext_same.c
new file mode 100644
index 00000000..f9a114a7
--- /dev/null
+++ b/storage/myisammrg/myrg_rnext_same.c
@@ -0,0 +1,51 @@
+/* Copyright (c) 2002, 2004-2007 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"
+
+
+int myrg_rnext_same(MYRG_INFO *info, uchar *buf)
+{
+  int err;
+  MI_INFO *mi;
+
+  if (!info->current_table)
+    return (HA_ERR_KEY_NOT_FOUND);
+
+  /* at first, do rnext for the table found before */
+  if ((err=mi_rnext_same(info->current_table->table,NULL)))
+  {
+    if (err == HA_ERR_END_OF_FILE)
+    {
+      queue_remove_top(&(info->by_key));
+      if (!info->by_key.elements)
+        return HA_ERR_END_OF_FILE;
+    }
+    else
+      return err;
+  }
+  else
+  {
+    /* Found here, adding to queue */
+    queue_top(&(info->by_key))=(uchar *)(info->current_table);
+    queue_replace_top(&(info->by_key));
+  }
+
+  /* now, mymerge's read_next is as simple as one queue_top */
+  mi=(info->current_table=(MYRG_TABLE *)queue_top(&(info->by_key)))->table;
+  return _myrg_mi_read_record(mi,buf);
+}
+