[BUGS] BUG #1677: Bug in select with Union

[Julien Vallet]

The following bug has been logged online:

Bug reference:      1677
Logged by:          Julien Vallet
Email address:      [EMAIL PROTECTED]
PostgreSQL version: 8.0 & 8.0.3
Operating system:   Windows XP
Description:        Bug in select with Union
Details: 

I think there is a problem with the select statement with Union.

Firstable, I create 3 tables (tuserprofileopp, tprofileopp and
tgroupprofileopp).

CREATE TABLE tuserprofileopp
(
  internalkey int8 NOT NULL,
  CONSTRAINT tuserprofileopp_pkey PRIMARY KEY (internalkey)
);

CREATE TABLE tprofileopp
(
  internalkey int8 NOT NULL,
  CONSTRAINT tprofileopp_pkey PRIMARY KEY (internalkey)
);

CREATE TABLE tgroupprofileopp
(
  internalkey int8 NOT NULL,
  manager_id int8,
  CONSTRAINT tgroupprofileopp_pkey PRIMARY KEY (internalkey)
);

Then, I write this request:
select *
from 
(
select 
internalKey, null as manager_id, 0 as clazz_ 
from TProfileOPP 
union select
internalKey, null as manager_id, 1 as clazz_ 
from TUserProfileOPP 
union select
internalKey, manager_id, 2 as clazz_ 
from TGroupProfileOPP 
) 
this_;

The result is "ERROR:  UNION types text and bigint cannot be matched"

If I do 
"select *
from 
(
select 
internalKey, null as manager_id, 0 as clazz_ 
from TProfileOPP 
union select
internalKey, manager_id, 2 as clazz_ 
from TGroupProfileOPP 
) 
this_;", It works.

Thank you.

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