On Sunday 10 November 2002 05:27 am, Tom Lane wrote: > snpe <[EMAIL PROTECTED]> writes: > > I work with JDeveloper and PostgreSQL JDBC and I have one problem. > > I get error : > > sub-SELECT in FORM must have an alias > > > > Is it SQL standard (must have alias) or PostgreSQL specific ? > > The SQL standard says you must write an alias. A FROM item is a <table > reference> (SQL92 section 7.4), which is defined (in SQL92 6.3) as > > <table reference> ::= > <table name> [ [ AS ] <correlation name> > [ <left paren> <derived column list> <right paren> ] ] > > | <derived table> [ AS ] <correlation name> > > [ <left paren> <derived column list> <right paren> ] > > | <joined table> > > where > > <derived table> ::= <table subquery> > > The square brackets show that an alias (<correlation name>) is optional > for a plain table name, but is required for a sub-SELECT (<derived > table>). > > This is not just a random whim on the part of the SQL spec writers. > One reason why they did it that way is to ensure that some specific > <correlation name> can be associated with every column produced by a > FROM clause. I used to remember some other interesting consequences, > but it's too late on a Saturday night to recall all the details... > > > I can't change SQL command, but it is internal JDeveloper command > > I have zero sympathy for "please change Postgres because my application > cannot be bothered to comply with the SQL specification".
I didn't say that.I asked if that is PostgreSQL specific.Thanks for answer. regards Haris Peco ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/users-lounge/docs/faq.html
