>> It seems PostgreSQL thinks "t1"_foo is equivalent to t1.
>
> It thinks you've given "t1" an alias of "_foo" in that query, same
> as if you'd had a space between "t1" and _foo.
Oh, ok. I thought we always need at least one space character between
the table name and the alias.
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp