Re: [GENERAL] ExecInitIndexScan ERROR?

What PostgreSQL version are you running?

> Hi,
>
> I just got the following error message and have no clue what I'm doing wrong:
>
> ERROR:  ExecInitIndexScan: both left and right op's are rel-vars
>
>
> Everything works fine with the following query:
>
> explain select p0.protein
> from dom_prot p0, dom_prot p1, dom_prot p2, dom_prot p3
> where p0.protein = p1.protein
> and p1.protein = p2.protein
> and p0.start < p1.start
> and p1.start < p2.start
> and p0.domain = 'SH3'
> and p1.domain = 'SH2'
> and p2.domain = 'SH3';
>
> NOTICE:  QUERY PLAN:
>
> Nested Loop  (cost=6.05 size=1 width=48)
>   ->  Nested Loop  (cost=4.05 size=1 width=32)
>         ->  Index Scan on p2  (cost=2.05 size=1 width=16)
>         ->  Index Scan on p1  (cost=2.00 size=1 width=16)
>   ->  Index Scan on p0  (cost=2.00 size=1 width=16)
>
>
> EXPLAIN
>
>
> Adding one to the 'from' list leads to the error message. Here' the query and
> it's plan:
>
> explain select p0.protein
> from dom_prot p0,
> dom_prot p1,
> dom_prot p2,
> dom_prot p3   -- the new guy
> where p0.protein = p1.protein
> and p1.protein = p2.protein
> and p0.start < p1.start
> and p1.start < p2.start
> and p0.domain = 'SH3'
> and p1.domain = 'SH2'
> and p2.domain = 'SH3';
>
> NOTICE:  QUERY PLAN:
>
> Nested Loop  (cost=3088.11 size=64517 width=52)
>   ->  Nested Loop  (cost=6.05 size=1 width=48)
>         ->  Nested Loop  (cost=4.05 size=1 width=32)
>               ->  Index Scan on p2  (cost=2.05 size=1 width=16)
>               ->  Index Scan on p1  (cost=2.00 size=1 width=16)
>         ->  Index Scan on p0  (cost=2.00 size=1 width=16)
>   ->  Seq Scan on p3  (cost=3082.06 size=64517 width=4)
>
> EXPLAIN
>
>
> As it might have something to do with my indices (??), here's what they look
> like:
>
>   CREATE INDEX dp_domain_ind
>      ON dom_prot USING btree(domain text_ops);
>   CREATE INDEX dp_score_ind
>      ON dom_prot USING btree(score int4_ops);
>
> And the table itself is:
>
>   CREATE TABLE dom_prot
>      (
>         domain text not null,
>         protein text not null,
>         start int4 not null,
>         ende int4 not null,
>         score int4,
>     e_value float8,
>     p_value char16,
>         primary key (domain, protein, start, ende)
>      );
>
> Sorry for that quite extensive mail,
>
> Joerg
>
> --
> Internet Joerg.Schultz@embl-heidelberg.de
> Address  EMBL, Meyerhofstr 1, 69012 Heidelberg, Germany
> Tel      +49 (0)6221 387 534, Fax +49 (0)6221 387517
> URL      http://www.embl-heidelberg.de/~jschultz/
>
>


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