From 71a5af5b52642cbe64960275f1994f5a57832ff3 Mon Sep 17 00:00:00 2001
From: unknown <monty@tik.mysql.fi>
Date: Sat, 12 Jan 2002 15:42:54 +0200
Subject: Added support of null keys in HEAP tables Added ORDER BY optimization

Docs/manual.texi:
  Added ORDER BY optimisation section
heap/_check.c:
  Cleanup
heap/heapdef.h:
  Added support of null keys in HEAP tables
heap/hp_hash.c:
  Added support of null keys in HEAP tables
heap/hp_open.c:
  Added support of null keys in HEAP tables
heap/hp_test2.c:
  Added support of null keys in HEAP tables
heap/hp_write.c:
  Added support of null keys in HEAP tables
include/heap.h:
  Added support of null keys in HEAP tables
include/my_base.h:
  Support for hash algoritm
isam/static.c:
  Cleanup
myisam/mi_static.c:
  Cleanup
sql/Makefile.am:
  Rename innobase -> innodb
sql/ha_berkeley.cc:
  Added ORDER BY optimization
sql/ha_berkeley.h:
  Added ORDER BY optimization
sql/ha_heap.cc:
  Added support for NULL keys
sql/ha_heap.h:
  Added support for NULL keys
sql/ha_isam.cc:
  Added ORDER BY optimization
sql/ha_isam.h:
  Added ORDER BY optimization
sql/ha_isammrg.h:
  Added ORDER BY optimization
sql/ha_myisam.cc:
  Added ORDER BY optimization
sql/ha_myisam.h:
  Added ORDER BY optimization
sql/ha_myisammrg.cc:
  Added ORDER BY optimization
sql/ha_myisammrg.h:
  Added ORDER BY optimization
sql/handler.cc:
  Rename innobase -> innodb
sql/handler.h:
  Rename innobase -> innodb
sql/ha_innodb.cc:
  Rename innobase -> innodb
sql/ha_innodb.h:
  Rename innobase -> innodb
sql/mysqld.cc:
  Rename innobase -> innodb
sql/sql_delete.cc:
  Rename innobase -> innodb
sql/sql_select.cc:
  Added ORDER BY optimization
sql/sql_select.h:
  Added ORDER BY optimization
---
 sql/ha_myisammrg.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'sql/ha_myisammrg.cc')

diff --git a/sql/ha_myisammrg.cc b/sql/ha_myisammrg.cc
index 999d9fe33ef..63a23fb708f 100644
--- a/sql/ha_myisammrg.cc
+++ b/sql/ha_myisammrg.cc
@@ -112,6 +112,15 @@ int ha_myisammrg::index_read_idx(byte * buf, uint index, const byte * key,
   return error;
 }
 
+int ha_myisammrg::index_read_last(byte * buf, const byte * key, uint key_len)
+{
+  statistic_increment(ha_read_key_count,&LOCK_status);
+  int error=myrg_rkey(file,buf,active_index, key, key_len,
+		      HA_READ_PREFIX_LAST);
+  table->status=error ? STATUS_NOT_FOUND: 0;
+  return error;
+}
+
 int ha_myisammrg::index_next(byte * buf)
 {
   statistic_increment(ha_read_next_count,&LOCK_status);
-- 
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