after review patch (SCRUM)

sql/sql_parse.cc:
  already fixed in right way
sql/udf_example.cc:
  not used function
tests/udf_test.res:
  added test of AS
tests/udf_test:
  added test of AS

sql/sql_parse.cc

@@ -2939,8 +2939,6 @@ mysql_execute_command(THD *thd)
 	break;
 #ifdef HAVE_DLOPEN
       sp_head *sph= sp_find_function(thd, &lex->udf.name);
-      // close & unlock table opened by sp_find_function
-      close_thread_tables(thd);
       if (sph)
       {
 	net_printf(thd, ER_UDF_EXISTS, lex->udf.name.str);

sql/udf_example.cc

@@ -991,7 +991,6 @@ avgcost( UDF_INIT* initid, UDF_ARGS* args, char* is_null, char* error )
 extern "C" {
 my_bool myfunc_argument_name_init(UDF_INIT *initid, UDF_ARGS *args,
 				  char *message);
-void myfunc_argument_name_deinit(UDF_INIT *initid);
 char *myfunc_argument_name(UDF_INIT *initid, UDF_ARGS *args, char *result,
 			   unsigned long *length, char *null_value,
 			   char *error);
@@ -1011,8 +1010,6 @@ my_bool myfunc_argument_name_init(UDF_INIT *initid, UDF_ARGS *args,
   return 0;
 }
 
-void myfunc_argument_name_deinit(UDF_INIT *initid) {}
-
 char *myfunc_argument_name(UDF_INIT *initid, UDF_ARGS *args, char *result,
 			   unsigned long *length, char *null_value,
 			   char *error)

tests/udf_test

@@ -21,7 +21,7 @@ create temporary table t1 (a int,b double);
 insert into t1 values (1,5),(1,4),(2,8),(3,9),(4,11);
 select avgcost(a,b) from t1;
 select avgcost(a,b) from t1 group by a;
-select a, myfunc_argument_name(a) from t1;
+select a, myfunc_argument_name(a), myfunc_argument_name(a as b) from t1;
 drop table t1;
 
 DROP FUNCTION metaphon;

tests/udf_test.res

@@ -116,12 +116,12 @@ avgcost(a,b)
 select a, myfunc_argument_name(a) from t1;
 --------------
 
-a       myfunc_argument_name(a)
-1       a
-1       a
-2       a
-3       a
-4       a
+a       myfunc_argument_name(a) myfunc_argument_name(a as b)
+1       a       b
+1       a       b
+2       a       b
+3       a       b
+4       a       b
 5 rows in set
 
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