[SQL] " ::= " grammar rule not accepted by Postgres

NATURAL JOIN t t2); But I am curious why the first expression is not accepted, besides the immediately obvious "it's not in the Postgres version of the SQL grammar." Clem Dickey

Re: [SQL] " ::= " grammar rule not accepted by Postgres

On 06/15/2011 10:59 PM, Tom Lane wrote: Clem Dickey writes: This expression is (I think) a well-formed query, but is rejected by Postgresql 8.4 (t is a table name). t t1 NATURAL JOIN t t2; Hmm ... I think you are looking at SQL92 or SQL99. [ digs a bit more... ] Ah, here we are