Curiously confused query parser.

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[PostgreSQL 6.6.0 on i386-unknown-freebsd3.2, compiled by gcc 2.7.2.1]

(a side note - wouldn't it be helpful to have a little more info about the
build, namely its time stamp and/or the CVS time stamp)

test=> \d ord
Table    = ord
+----------------------------------+----------------------------------+-----
--+
|              Field               |              Type                |
Length|
+----------------------------------+----------------------------------+-----
--+
| id                               | int4                             |
4 |
| pos                              | int4                             |
4 |
| tp                               | int4                             |
4 |
+----------------------------------+----------------------------------+-----
--+

test=> select * from ord;
id|pos|tp
--+---+--1|  1| 12|  2| 13|  3| 24|  1| 25|  3| 1
(5 rows)

This query is fine:

test=> select o1.id from ord as o1, ord as o2 where o1.pos>2 and o2.pos<2
test-> and o1.tp=o2.tp;
id
--53
(2 rows)

And this one is invalid:

test=> select o1.id from ord as o1, ord as o2 where o1.pos>2 and o2.pos<2
test-> and o1.tp=o2.tp and ord.id>3;
id
--5533
(4 rows)

This query should probably fail instead of returning an invalid result. MS
SQL 6.5 does just that:

Msg 107, Level 16, State 3
The column prefix 'ord' does not match with a table name or alias name used
in the query.

Gene Sokolov