Merge

BitKeeper/etc/logging_ok:
  auto-union
mysql-test/mysql-test-run.sh:
  Auto merged
ndb/src/ndbapi/NdbDictionaryImpl.cpp:
  Auto merged
ndb/src/ndbapi/ndb_cluster_connection.cpp:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/ha_ndbcluster.cc:
  SCCS merged

2 files changed, 3 insertions, 2 deletions

diff --git a/include/hash.h b/include/hash.h
index c7cc118b7bd..6e6db27cd40 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -47,6 +47,7 @@ my_bool _hash_init(HASH *hash, CHARSET_INFO *charset,
 		   uint key_length, hash_get_key get_key,
 		   void (*free_element)(void*), uint flags CALLER_INFO_PROTO);
 void hash_free(HASH *tree);
+void hash_reset(HASH *hash);
 byte *hash_element(HASH *hash,uint idx);
 gptr hash_search(HASH *info,const byte *key,uint length);
 gptr hash_next(HASH *info,const byte *key,uint length);
@@ -56,7 +57,6 @@ my_bool hash_update(HASH *hash,byte *record,byte *old_key,uint old_key_length);
 void hash_replace(HASH *hash, uint idx, byte *new_row);
 my_bool hash_check(HASH *hash);			/* Only in debug library */
 
-#define hash_clear(H) bzero((char*) (H),sizeof(*(H)))
 #define hash_inited(H) ((H)->array.buffer != 0)
 
 #ifdef	__cplusplus
diff --git a/include/my_sys.h b/include/my_sys.h
index ad1966ba67f..271e0ea0bcb 100644
--- a/include/my_sys.h
+++ b/include/my_sys.h
@@ -725,7 +725,8 @@ extern void my_free_lock(byte *ptr,myf flags);
 #define my_free_lock(A,B) my_free((A),(B))
 #endif
 #define alloc_root_inited(A) ((A)->min_malloc != 0)
-#define clear_alloc_root(A) bzero((void *) (A), sizeof(MEM_ROOT))
+#define ALLOC_ROOT_MIN_BLOCK_SIZE (MALLOC_OVERHEAD + sizeof(USED_MEM) + 8)
+#define clear_alloc_root(A) do { (A)->free= (A)->used= (A)->pre_alloc= 0; } while(0)
 extern void init_alloc_root(MEM_ROOT *mem_root, uint block_size,
 			    uint pre_alloc_size);
 extern gptr alloc_root(MEM_ROOT *mem_root,unsigned int Size);