Yes, you're right--I'd have to consider combo cases too. Thanks to everybody that made suggestions. I guess it's not a really big deal if I can't do this---was just hoping to add some bells and whistles to a script that basically works fine as it is. ;) ----- Original Message ----- From: "Adam Lang" <aalang@xxxxxxxxxxxxxxxxxxxx> Cc: <pgsql-php@xxxxxxxxxxxxxx> Sent: Thursday, July 26, 2001 2:56 PM Subject: Re: [PHP] Re: how to determine where a select statement fails > What you also have to keep in mind is that one clause is not necessarily > keeping you from getting zero rows. > > For example. > > You have st_name and city. > > Say you hve 5 entries for a street named "main" and 5 entries for a city > named "plainfield". But you have NO entries for a street named "main" in > the city of "plainfield". The fact you are looking for both is what returns > zero rows. Individually they exist. > > What you are trying to do is nto easy at all. You can't just do if > statements to see which column has zero rows. You have to also check to see > what combo of clauses return ero. > > Adam Lang > Systems Engineer > Rutgers Casualty Insurance Company > http://www.rutgersinsurance.com > ----- Original Message ----- > From: "Heather Johnson" <hjohnson@xxxxxxxxxx> > To: <Timothy_Maguire@xxxxxxxxxxxxxx> > Cc: <pgsql-php@xxxxxxxxxxxxxx>; <pgsql-php-owner@xxxxxxxxxxxxxx> > Sent: Thursday, July 26, 2001 2:30 PM > Subject: Re: [PHP] Re: how to determine where a select statement fails > > > > Thanks for the suggestion! I don't really want to do that though b/c the > > table that I'm searching is pretty large. I was hoping to do only one > query > > on the table and then put some indexes on the fields to improve > performance. > > But I can't think of a way to structure my code so that I can do just one > > query AND get info about which user-entered values don't find a match. > > (Brent Matzelle suggested that this isn't really a "failure" of the query, > > and I guess he's right, so hopefully this describes what I'm talking about > a > > little better). > > > > Heather > > > "Heather Johnson" > > > <hjohnson@xxxxxxxxxx To: > > <pgsql-php@xxxxxxxxxxxxxx> > > > > cc: > > > Sent by: Subject: how to > > determine where a select statement > > > pgsql-php-owner@post fails > > > gresql.org > > > > > > > > > 07/26/01 11:15 AM > > > > > > > > > > > > > > > > > > > > > I am using php to do a select query which returns rows on the condition > > > that > > > a conjunction is true in the WHERE clause. This is the SELECT statement: > > > > > > SELECT low_range, high_range, st_name, city, zip FROM router > > > WHERE st_name = '$st_name' AND city = '$city' AND zip = '$zip'; > > > > > > In the event that the query fails to return any rows, I'd like to be > able > > > to > > > determine which conjunct caused it to fail. So, for example, if the > > > user-entered $st_name isn't in the router table, I'd like to know that > > > st_name = '$st_name' is what made the conjunction false and caused the > > > query > > > to fail. $pg_errormsg isn't this specific about query failures though. > > Does > > > anyone know how I might be able to get this information? > > > > > > Thanks! > > > Heather Johnson > > > > ---------------------------(end of broadcast)--------------------------- > TIP 1: subscribe and unsubscribe commands go to majordomo@xxxxxxxxxxxxxx ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to majordomo@xxxxxxxxxxxxxx)
