On Mon, Jul 14, 2003 at 09:59:17AM +0200, Michael Van Canneyt wrote: > > > On Mon, 14 Jul 2003, James Mills wrote: > > > Hi, > > > > This is a very weird behaviour I've found of either SQLite, or the Unit. > > I'm not sure... I have been discussing this same problem on the SQLite > > mailing list but without success there, so perhaps someone here might > > know... > > > > I have attached a test database, which contains 1 database entry, null > > strings are inserted using NULL... Check the database schema yourself. > > > > The problem therein lies in the fact that test3.pas returns "" for the > > query: SELECT channelNotice FROM channels WHERE channel LIKE '#ProLogiTech'; > > It should return a null string as it does in test2.pas and in the sqlite > > shell program. > > The problem is that an implicity conversion from Nil to empty string is > done. You cannot solve this as long as stringlists are used to contain > the data. (ok, you could set 'Null' as the string, but that is sloppy) > > You'd need to have (as a minimum) an array of TField records: > TField = Record > IsNull : Boolean; > Value : String; > end; > > But this will require major changes, so I suggest trying to find or > implement a TDataset descendent for SQLIte, this will solve most of > your problems at once.
Where might I find such a descendent that using SQLite ? I'm not quite sure what I'm looking for here... An initial search on google provides some delphi units that are probably not what I'm looking for. cheers James > > Michael. > > > _______________________________________________ > fpc-pascal maillist - [EMAIL PROTECTED] > http://lists.freepascal.org/mailman/listinfo/fpc-pascal -- - - James Mills Zero Defect Software Engineers Group - ZDSEG _______________________________________________ fpc-pascal maillist - [EMAIL PROTECTED] http://lists.freepascal.org/mailman/listinfo/fpc-pascal