Delimited identifier brhavior

Hi,

I' wondering if following delimited identifier brhavior is correct or
not:

test=# create table t1(i int);
create table t1(i int);
CREATE TABLE
test=# create table t1_foo(i int, j int);
create table t1_foo(i int, j int);
CREATE TABLE
test=# select * from t1;
select * from t1;i 
---
(0 rows)

test=# select * from t1_foo;
select * from t1_foo;i | j 
---+---
(0 rows)

test=# select * from "t1"_foo;
select * from "t1"_foo;i 
---
(0 rows)

It seems PostgreSQL thinks "t1"_foo is equivalent to t1. Is this an
expected behavior?
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp