Merge adventure.(none):/home/thek/Development/cpp/bug26277/my51-bug26277

into  adventure.(none):/home/thek/Development/cpp/mysql-5.1-runtime

mysql-test/r/sp-vars.result

@@ -1202,3 +1202,29 @@ after substr	str_remainder
 after substr	b,c
 DROP PROCEDURE bug27415_text_test|
 DROP PROCEDURE bug27415_text_test2|
+drop function if exists f1;
+drop table if exists t1;
+create function f1() returns int 
+begin
+if @a=1 then set @b='abc';
+else set @b=1;
+end if;
+set @a=1;
+return 0;
+end|
+create table t1 (a int)|
+insert into t1 (a) values (1), (2)|
+set @b=1|
+set @a=0|
+select f1(), @b from t1|
+f1()	@b
+0	1
+0	0
+set @b:='test'|
+set @a=0|
+select f1(), @b from t1|
+f1()	@b
+0	1
+0	abc
+drop function f1;
+drop table t1;

mysql-test/r/type_date.result

@@ -110,15 +110,24 @@ select 1 from t1 where cast('2000-01-01 12:01:01' as datetime) between start_dat
 1
 1
 drop table t1;
-select @d:=1111, year(@d), month(@d), day(@d), cast(@d as date);
-@d:=1111	year(@d)	month(@d)	day(@d)	cast(@d as date)
-1111	2000	11	11	2000-11-11
-select @d:=011111, year(@d), month(@d), day(@d), cast(@d as date);
-@d:=011111	year(@d)	month(@d)	day(@d)	cast(@d as date)
-11111	2001	11	11	2001-11-11
-select @d:=1311, year(@d), month(@d), day(@d), cast(@d as date);
-@d:=1311	year(@d)	month(@d)	day(@d)	cast(@d as date)
-1311	NULL	NULL	NULL	NULL
+select @d:=1111;
+@d:=1111
+1111
+select year(@d), month(@d), day(@d), cast(@d as date);
+year(@d)	month(@d)	day(@d)	cast(@d as date)
+2000	11	11	2000-11-11
+select @d:=011111;
+@d:=011111
+11111
+select year(@d), month(@d), day(@d), cast(@d as date);
+year(@d)	month(@d)	day(@d)	cast(@d as date)
+2001	11	11	2001-11-11
+select @d:=1311;
+@d:=1311
+1311
+select year(@d), month(@d), day(@d), cast(@d as date);
+year(@d)	month(@d)	day(@d)	cast(@d as date)
+NULL	NULL	NULL	NULL
 Warnings:
 Warning	1292	Incorrect datetime value: '1311'
 Warning	1292	Incorrect datetime value: '1311'

mysql-test/r/user_var.result

@@ -91,7 +91,7 @@ NULL	test	test
 set @g=1;
 select @g,(@g:=c),@g from t1;
 @g	(@g:=c)	@g
-1	test	test
+1	test	0
 select @c, @d, @e, @f;
 @c	@d	@e	@f
 1	1	2	test

mysql-test/t/sp-vars.test

@@ -1412,3 +1412,39 @@ DROP PROCEDURE bug27415_text_test2|
 DELIMITER ;|
 
 # End of 5.0 tests.
+
+#
+# Bug #26277 User variable returns one type in SELECT @v and other for CREATE as SELECT @v
+#
+--disable_warnings
+drop function if exists f1;
+drop table if exists t1;
+--enable_warnings
+
+delimiter |;
+create function f1() returns int 
+begin
+ if @a=1 then set @b='abc';
+ else set @b=1;
+ end if;
+ set @a=1;
+ return 0;
+end|
+
+create table t1 (a int)|
+insert into t1 (a) values (1), (2)|
+
+set @b=1|
+set @a=0|
+select f1(), @b from t1|
+
+set @b:='test'|
+set @a=0|
+select f1(), @b from t1|
+
+delimiter ;|
+
+drop function f1;
+drop table t1;
+# End of 5.1 tests.
+

mysql-test/t/type_date.test

@@ -128,9 +128,12 @@ drop table t1;
 # Bug #23093: Implicit conversion of 9912101 to date does not match
 # cast(9912101 as date)
 #
-select @d:=1111, year(@d), month(@d), day(@d), cast(@d as date);
-select @d:=011111, year(@d), month(@d), day(@d), cast(@d as date);
-select @d:=1311, year(@d), month(@d), day(@d), cast(@d as date);
+select @d:=1111;
+select year(@d), month(@d), day(@d), cast(@d as date);
+select @d:=011111;
+select year(@d), month(@d), day(@d), cast(@d as date);
+select @d:=1311;
+select year(@d), month(@d), day(@d), cast(@d as date);
 create table t1 (d  date , dt datetime , ts timestamp);
 insert into t1 values (9912101,9912101,9912101);
 insert into t1 values (11111,11111,11111);

sql/item_func.cc

@@ -36,7 +36,6 @@
 #define sp_restore_security_context(A,B) while (0) {}
 #endif
 
-
 bool check_reserved_words(LEX_STRING *name)
 {
   if (!my_strcasecmp(system_charset_info, name->str, "GLOBAL") ||
@@ -4451,7 +4450,7 @@ int get_var_with_binlog(THD *thd, enum_sql_command sql_command,
     > set @a:=1;
     > insert into t1 values (@a), (@a:=@a+1), (@a:=@a+1);
     We have to write to binlog value @a= 1.
-    
+
     We allocate the user_var_event on user_var_events_alloc pool, not on
     the this-statement-execution pool because in SPs user_var_event objects 
     may need to be valid after current [SP] statement execution pool is
@@ -4461,7 +4460,7 @@ int get_var_with_binlog(THD *thd, enum_sql_command sql_command,
   if (!(user_var_event= (BINLOG_USER_VAR_EVENT *)
         alloc_root(thd->user_var_events_alloc, size)))
     goto err;
-  
+
   user_var_event->value= (char*) user_var_event +
     ALIGN_SIZE(sizeof(BINLOG_USER_VAR_EVENT));
   user_var_event->user_var_event= var_entry;
@@ -4483,7 +4482,7 @@ int get_var_with_binlog(THD *thd, enum_sql_command sql_command,
   var_entry->used_query_id= thd->query_id;
   if (insert_dynamic(&thd->user_var_events, (gptr) &user_var_event))
     goto err;
-  
+
   *out_entry= var_entry;
   return 0;
 
@@ -4492,7 +4491,6 @@ int get_var_with_binlog(THD *thd, enum_sql_command sql_command,
   return 1;
 }
 
-
 void Item_func_get_user_var::fix_length_and_dec()
 {
   THD *thd=current_thd;
@@ -4503,10 +4501,19 @@ void Item_func_get_user_var::fix_length_and_dec()
 
   error= get_var_with_binlog(thd, thd->lex->sql_command, name, &var_entry);
 
+  /*
+    If the variable didn't exist it has been created as a STRING-type.
+    'var_entry' is NULL only if there occured an error during the call to
+    get_var_with_binlog.
+  */
   if (var_entry)
   {
+    m_cached_result_type= var_entry->type;
+    unsigned_flag= var_entry->unsigned_flag;
+    max_length= var_entry->length;
+
     collation.set(var_entry->collation);
-    switch (var_entry->type) {
+    switch(m_cached_result_type) {
     case REAL_RESULT:
       max_length= DBL_DIG + 8;
       break;
@@ -4531,6 +4538,8 @@ void Item_func_get_user_var::fix_length_and_dec()
   {
     collation.set(&my_charset_bin, DERIVATION_IMPLICIT);
     null_value= 1;
+    m_cached_result_type= STRING_RESULT;
+    max_length= MAX_BLOB_WIDTH;
   }
 
   if (error)
@@ -4548,12 +4557,7 @@ bool Item_func_get_user_var::const_item() const
 
 enum Item_result Item_func_get_user_var::result_type() const
 {
-  user_var_entry *entry;
-  if (!(entry = (user_var_entry*) hash_search(&current_thd->user_vars,
-					      (byte*) name.str,
-					      name.length)))
-    return STRING_RESULT;
-  return entry->type;
+  return m_cached_result_type;
 }
 
 

sql/item_func.h

@@ -1256,11 +1256,12 @@ class Item_func_get_user_var :public Item_func,
                               private Settable_routine_parameter
 {
   user_var_entry *var_entry;
+  Item_result m_cached_result_type;
 
 public:
   LEX_STRING name; // keep it public
   Item_func_get_user_var(LEX_STRING a):
-    Item_func(), name(a) {}
+    Item_func(), name(a), m_cached_result_type(STRING_RESULT) {}
   enum Functype functype() const { return GUSERVAR_FUNC; }
   LEX_STRING get_name() { return name; }
   double val_real();
@@ -1274,13 +1275,11 @@ class Item_func_get_user_var :public Item_func,
     We must always return variables as strings to guard against selects of type
     select @t1:=1,@t1,@t:="hello",@t from foo where (@t1:= t2.b)
   */
-  enum_field_types field_type() const  { return MYSQL_TYPE_VARCHAR; }
   const char *func_name() const { return "get_user_var"; }
   bool const_item() const;
   table_map used_tables() const
   { return const_item() ? 0 : RAND_TABLE_BIT; }
   bool eq(const Item *item, bool binary_cmp) const;
-
 private:
   bool set_value(THD *thd, sp_rcontext *ctx, Item **it);