Table alias fun == incorrectly adding tables to join...

Here's a fun one.

test=# CREATE TABLE table_s1 (i int);
test=# CREATE TABLE table_s2 (j int);
test=# EXPLAIN ANALYZE SELECT table_s1.i, table_s2.j FROM table_s1 AS s1, table_s2 AS s2 WHERE s1.i = s2.j;
NOTICE: adding missing FROM-clause entry for table "table_s1"
NOTICE: adding missing FROM-clause entry for table "table_s2"
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------
Nested Loop (cost=0.00..0.03 rows=1 width=8) (actual time=0.03..0.03 rows=0 loops=1)
-> Nested Loop (cost=0.00..0.02 rows=1 width=4) (actual time=0.02..0.02 rows=0 loops=1)
-> Nested Loop (cost=0.00..0.01 rows=1 width=0) (actual time=0.01..0.01 rows=0 loops=1)
Join Filter: ("outer".i = "inner".j)
-> Seq Scan on table_s1 s1 (cost=0.00..0.00 rows=1 width=4) (actual time=0.01..0.01 rows=0 loops=1)
-> Seq Scan on table_s2 s2 (cost=0.00..0.00 rows=1 width=4) (never executed)
-> Seq Scan on table_s1 (cost=0.00..0.00 rows=1 width=4) (never executed)
-> Seq Scan on table_s2 (cost=0.00..0.00 rows=1 width=4) (never executed)
Total runtime: 0.20 msec
(9 rows)

If there's real data in the tables, this joins the tables on itself
and execution times explode, naturally. I don't know if the spec says
this is the correct behavior or not, but I have a feeling its not and
this is a bug. -sc

--
Sean Chittenden