On Mon, Jul 14, 2003 at 03:39:36PM +0200, Michael Van Canneyt wrote: > > > On Mon, 14 Jul 2003, James Mills wrote: > > > 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. > > On the contrary, on Torry's pages there are some units that do exactly > what I described.
Ok thanks. I had searched for "TDataset descendant sqlite pascal" one page came up from Torry's pages. *hits Mozilla, it crashes too much :P* 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
