::index_read_last() method has been added

sql/ha_heap.cc

@@ -81,6 +81,15 @@ int ha_heap::index_read(byte * buf, const byte * key, uint key_len,
   return error;
 }
 
+int ha_heap::index_read_last(byte *buf, const byte *key, uint key_len)
+{
+  statistic_increment(ha_read_key_count, &LOCK_status);
+  int error= heap_rkey(file, buf, active_index, key, key_len,
+		       HA_READ_PREFIX_LAST);
+  table->status= error ? STATUS_NOT_FOUND : 0;
+  return error;
+}
+
 int ha_heap::index_read_idx(byte * buf, uint index, const byte * key,
 			    uint key_len, enum ha_rkey_function find_flag)
 {
@@ -90,7 +99,6 @@ int ha_heap::index_read_idx(byte * buf, uint index, const byte * key,
   return error;
 }
 
-
 int ha_heap::index_next(byte * buf)
 {
   statistic_increment(ha_read_next_count,&LOCK_status);

sql/ha_heap.h

@@ -67,6 +67,7 @@ class ha_heap: public handler
 		 uint key_len, enum ha_rkey_function find_flag);
   int index_read_idx(byte * buf, uint idx, const byte * key,
 		     uint key_len, enum ha_rkey_function find_flag);
+  int index_read_last(byte * buf, const byte * key, uint key_len);
   int index_next(byte * buf);
   int index_prev(byte * buf);
   int index_first(byte * buf);