fixed Bug #4358 Problem with HAVING clause that uses alias

       from the select list and TEXT field 

make setup_copy_fields to insert Item_copy_string for blobs in 
the beginning of the copy_funcs (push_back instead of push_front)

the thing is that Item_copy_string::copy for function can call 
Item_copy_string::val_int for blob via Item_ref.
But if Item_copy_string::copy for blob isn't called before, 
it's value will be wrong.

So all the Item_copy_string::copy for blobs should be called before 
Item_copy_string::copy for functions.


mysql-test/r/having.result:
  added test case for
  Bug #4358 Problem with HAVING clause that uses
              alias from the select list and TEXT field
mysql-test/t/having.test:
  added test case for
  Bug #4358 Problem with HAVING clause that uses
              alias from the select list and TEXT field
sql/sql_select.cc:
  make setup_copy_fields to insert Item_copy_string for blobs in 
  the beginning of the copy_funcs (push_back instead of push_front)
  
  the thing is that Item_copy_string::copy for function can call 
  Item_copy_string::val_int for blob via Item_ref.
  But if Item_copy_string::copy for blob isn't called before, 
  it's value will be wrong.
  
  So all the Item_copy_string::copy for blobs should be called before 
  Item_copy_string::copy for functions.
  
  fixed 
  Bug #4358 Problem with HAVING clause that
             uses alias from the select list and TEXT field

1 files changed, 40 insertions, 0 deletions

diff --git a/mysql-test/r/having.result b/mysql-test/r/having.result
index d643070f7f9..f0e9172991c 100644
--- a/mysql-test/r/having.result
+++ b/mysql-test/r/having.result
@@ -78,3 +78,43 @@ sqty
 5
 9
 drop table t1;
+CREATE TABLE t1 (
+`id` bigint(20) NOT NULL default '0',
+`description` text
+) TYPE=MyISAM;
+CREATE TABLE t2 (
+`id` bigint(20) NOT NULL default '0',
+`description` varchar(20)
+) TYPE=MyISAM;
+INSERT INTO t1  VALUES (1, 'test');
+INSERT INTO t2 VALUES (1, 'test');
+CREATE TABLE t3 (
+`id`       bigint(20) NOT NULL default '0',
+`order_id` bigint(20) NOT NULL default '0'
+) TYPE=MyISAM;
+select
+a.id, a.description,
+count(b.id) as c 
+from t1 a left join t3 b on a.id=b.order_id 
+group by a.id, a.description 
+having (a.description is not null) and (c=0);
+id	description	c
+1	test	0
+select
+a.*, 
+count(b.id) as c 
+from t2 a left join t3 b on a.id=b.order_id 
+group by a.id, a.description
+having (a.description is not null) and (c=0);
+id	description	c
+1	test	0
+INSERT INTO t1  VALUES (2, 'test2');
+select
+a.id, a.description,
+count(b.id) as c 
+from t1 a left join t3 b on a.id=b.order_id 
+group by a.id, a.description 
+having (a.description is not null) and (c=0);
+id	description	c
+1	test	0
+2	test2	0