BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TTable's RecNo          BorlandTalk.com Forum Index -> C++ Builder Databases (SQL Servers) View previous topic :: View next topic   Author Message Giuliano Guest Posted: Mon Jul 19, 2004 9:56 pm    Post subject: Re: TTable's RecNo On Tue, 20 Jul 2004 01:08:48 -0700, "Stas" <stama (AT) ihug (DOT) co.nz> wrote: Quote: Hi guys, Could someone please tell me why would a RecNo property of TTable always be equal to -1, and how to fix this(if possible)? I'm using BCB 5 and have a table with a primary index stored in MySql. Any help would be greately appreciated. Thanks in advance. Hi Stas, isn't a good idea to use RecNo property with SQL servers. To retrieve a specific record you should use the primary key instead. Relational databases are "Value Oriented" data-base-management-system, they aren't "Object Oriented" data-base-management-system. So, trying to retrieve a specific "row" using the "record position" (i.e., making a parallel with an programming language, trying to identify a specific row by position, like if the position would be the object's address), IMHO is a bad practice because, as you have seen, doesn't scale very well with RDBM server like, e.g., MySql. Hence, you can try to use TDataSet::Locate and specify the primary key (i.e a unique values combination of some fields) like search argument. Also you can try to use the TDataSet's bookmarks-related methods: TDataset::GetBookmark, TDataset::GotoBookmark and TDataset::FreeBookmark. Giuliano Back to top Stas Guest Posted: Tue Jul 20, 2004 8:08 am    Post subject: TTable's RecNo Hi guys, Could someone please tell me why would a RecNo property of TTable always be equal to -1, and how to fix this(if possible)? I'm using BCB 5 and have a table with a primary index stored in MySql. Any help would be greately appreciated. Thanks in advance. 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