Rich Shepard <rshepard(at)appl-ecosys(dot)com> writes:
> Long ago I wrote a query which was greatly improved (i.e., it actually
> worked as intended) by help here):
> SELECT ...
> WHERE p.lname = &p.lname AND p.fname = &p.fname;
> I did not save the reason why the ampersand is used in the WHERE row selection
> phrase and want now to learn why it's there. Probably needed to concatenate
> separate names?
AFAICS this is invoking a prefix operator named "&". There is no such
operator built into Postgres. Maybe psql's "\do+ &" would jog your
memory about where yours came from.
regards, tom lane