Hi Bill, my curiousity is up now.
I am not familiar with nulls in MapBasic myself, but I noticed in MapInfo a null is a 0 (zero) if the field is numeric and a string field is an empty string (i.e. ""). At least this is how it is handled in the SQL. In a string situation, is the empty string in quotations also evaluated as 0 (zero) programmatically by MapInfo? Don Mitchell -----Original Message----- From: Bill Thoen [mailto:[EMAIL PROTECTED] Sent: December 7, 2004 5:07 PM To: John Polasky Cc: [EMAIL PROTECTED] Subject: Re: MI-L MapBasic Null Value On Tue, 7 Dec 2004, John Polasky wrote: > Using an If...Then statement, how do I tell MapInfo to identify that the > variable is empty? I can't use zero for the check obviously, but is > there a MapBasic code that identifies a null value? No. A blank is the same as a zero to MapInfo. --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 14415 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 14423
