Re: Re: External search engine, advice - Mailing list pgsql-hackers

mlw <markw@mohawksoft.com> writes:
> freedb=# select * from cdsongs where songid = ftss_results() ;
> ERROR:  Set-valued function called in context that cannot accept a set

'=' is a scalar operation.  Try

select * from cdsongs where songid IN (select ftss_results());
        regards, tom lane