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Re: ExecInitIndexScan: both left and right ops are rel-vars

From: Ed Loehr <eloehr(at)austin(dot)rr(dot)com>
To: pghackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: ExecInitIndexScan: both left and right ops are rel-vars
Date: 2000-06-26 05:29:37
Message-ID: 3956EA41.CCF94043@austin.rr.com (view raw or flat)
Thread:
Lists: pgsql-hackers
Ed Loehr wrote:
> 
> And here is an old nemesis, thought to have been fixed in 7.0,
> reproducible on 7.0beta3 with the following:
> 
> DROP TABLE foo;
> CREATE TABLE foo (d date);
> CREATE UNIQUE INDEX date_uidx ON foo(d);
> CREATE UNIQUE INDEX datetime_uidx ON foo(datetime(d));
> INSERT INTO foo (d) VALUES ('17-Jun-1995');
> 
> DROP TABLE bar;
> DROP SEQUENCE bar_id_seq;
> CREATE TABLE bar (
>     id SERIAL,
>     start_time DATETIME,
>     duration FLOAT
> );
> INSERT INTO bar (start_time, duration) VALUES ('17-Jun-1995', 3);
> 
> DROP TABLE baz;
> DROP SEQUENCE baz_id_seq;
> CREATE TABLE baz (
>     id SERIAL,
>     bar_id INTEGER,
>     duration FLOAT
> );
> INSERT INTO baz (bar_id, duration) SELECT id, duration FROM bar;
> 


A final clue:  if I run 'VACUUM ANALYZE' at this point in the script,
before the select, the error disappears.

Regards,
Ed Loehr

> -- Here's the offending query...
> SELECT f.d, r.start_time::date, r.duration AS "r_dur", z.duration AS
> "z_dur"
> FROM foo f, bar r, baz z
> WHERE r.id = 2
>   AND z.bar_id = 2
>   AND f.d = (r.start_time - '1 day'::interval)::date ;

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