Possible Bug

From: Kaloyan Iliev Iliev <kaloyan(at)digsys(dot)bg>
To: pgsql-general(at)postgresql(dot)org
Subject: Possible Bug
Date: 2011-02-09 09:51:38
Message-ID: 4D5263AA.9050807@digsys.bg
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Hi,
I think I found something strange in PostgreSQL behavior. Here is an
example:

testdb=# CREATE TABLE test1 (test2 text, test3 text);
CREATE TABLE
testdb=# SELECT A.name FROM test1 A;
name
------
(0 rows)

testdb=# INSERT INTO test1 (test2,test3) VALUES ('1','2');
INSERT 0 1
testdb=# INSERT INTO test1 (test2,test3) VALUES ('3','4');
INSERT 0 1
testdb=# SELECT A.name FROM test1 A;
name
-------
(1,2)
(3,4)
(2 rows)

customer.20080408=# SELECT name FROM test1;
ERROR: column "name" does not exist
LINE 1: SELECT name FROM test1;

testdb=# SELECT version();

version
----------------------------------------------------------------------------------------------------------
PostgreSQL 8.4.5 on amd64-portbld-freebsd8.1, compiled by GCC cc (GCC)
4.2.1 20070719 [FreeBSD], 64-bit
(1 row)

Obviously there is no column with name "name", but the SELECT query
(ONLY WHEN I USE ALIASES) returns result for it.
And if I have a column with name "name_en" and by mistake write it
"name", instead of error I receive strange data (ARRAY from all
columns), that I don't expect.

Could you tell me if this is a bug or some feature I haven't heard of.

Best regards,
Kaloyan Iliev

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