current_user() to return priv_user

sql/item.h

@@ -267,6 +267,8 @@ public:
   }
   Item_string(const char *name_par,const char *str,uint length)
   {
+    if (!length)
+      length=strlen(str);
     str_value.set(str,length);
     max_length=length;
     name=(char*) name_par;

sql/item_create.cc

@@ -291,6 +291,15 @@ Item *create_func_pow(Item* a, Item *b)
   return new Item_func_pow(a,b);
 }
 
+Item *create_func_current_user()
+{
+  THD *thd=current_thd;
+  Item_string *res=new Item_string("CURRENT_USER()", thd->priv_user, 0);
+  res->append("@", 1);
+  res->append((char *)thd->host_or_ip, 0);
+  return res;
+}
+
 Item *create_func_quarter(Item* a)
 {
   return new Item_func_quarter(a);
@@ -394,7 +403,7 @@ Item *create_func_ucase(Item* a)
 
 Item *create_func_version(void)
 {
-  return new Item_string(NullS,server_version, (uint) strlen(server_version));
+  return new Item_string("VERSION()",server_version, 0);
 }
 
 Item *create_func_weekday(Item* a)

sql/item_create.h

@@ -68,6 +68,7 @@ Item *create_func_period_add(Item* a, Item *b);
 Item *create_func_period_diff(Item* a, Item *b);
 Item *create_func_pi(void);
 Item *create_func_pow(Item* a, Item *b);
+Item *create_func_current_user(void);
 Item *create_func_quarter(Item* a);
 Item *create_func_radians(Item *a);
 Item *create_func_release_lock(Item* a);

sql/lex.h

@@ -398,7 +398,7 @@ static SYMBOL sql_functions[] = {
   { "CAST",		SYM(CAST_SYM),0,0},
   { "CEIL",		SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_ceiling)},
   { "CEILING",		SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_ceiling)},
-  { "CURRENT_USER",	SYM(USER),0,0},
+  { "CURRENT_USER",	SYM(FUNC_ARG0),0,CREATE_FUNC(create_func_current_user)},
   { "BIT_LENGTH",	SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_bit_length)},
   { "CHAR_LENGTH",	SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_char_length)},
   { "CHARACTER_LENGTH", SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_char_length)},