2010/10/31 Paul <magamos@xxxxxxx>: > Tom, > > Sunday, October 31, 2010, 9:42:27 PM, you wrote: > > TL> Because the SQL standard says so. > > But Âthere Âis Ânot Âsuch Âthing Âin PostgreSQL as empty set as "IN ()" that must be > false, because nothing element may be found in empty set. > And ÂI Âthought that instead of "IN ()" I could use "IN (NULL)", but I > was failed and result was NULL and not FALSE. :( > (NULL) isn't empty set. Empty set can be (SELECT 1 WHERE false) Regards Pavel > -- > Paul > > > -- > Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general > -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
