Re: isValid availability
От | Dave Cramer |
---|---|
Тема | Re: isValid availability |
Дата | |
Msg-id | CADK3HHJ+D6y1zz+w0R98DFkWx+swO60j1DeRQDdRM3-_yy1vEg@mail.gmail.com обсуждение исходный текст |
Ответ на | isValid availability (Luis Flores <luiscamposflores@gmail.com>) |
Список | pgsql-jdbc |
Luis, Other than my mistakes, there is no reason. Dave Cramer dave.cramer(at)credativ(dot)ca http://www.credativ.ca On Thu, Sep 27, 2012 at 7:33 AM, Luis Flores <luiscamposflores@gmail.com> wrote: > Hello, > > The method isValid is implemented and committed since 2012-01-19 by > Dave Cramer, however, it isn't available on the driver version 901 and > 902. > > Any reason why? > > On the same subject, the implementation is using SELECT 1; because it > was the simplest query returning a value, simply issuing an "" won't > guarantee to go to the back-end (it may go for now, but it depends on > the driver bottom layer to issue it to the back-end. And the is no > real performance advantage from "" to "SELECT 1" since no one is going > to call isValid hundreds of times a second. > > I also noted that the driver release dates on the site are incorrect > (http://jdbc.postgresql.org/changes.html) for driver 901 and 902 > (copy/paste is evil). > > Thank you all, > > Luis Flores > > > -- > Sent via pgsql-jdbc mailing list (pgsql-jdbc@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-jdbc
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