Hi there, I'm currently building my own virtual table implementation. I've built a dummy vtable that returns the string "1" to all queries for all columns.... but I'm having trouble getting started (getting a 'misuse' error). Can someone help me get in the right direction?
>>>>>>>>>>>>> 1) I first create an sqlite3* object in ":memory:". This one works fine. 2) Allocate and init my derived sqlite3_module* object. 2.1) Function pointers I use are Create,Destroy, Connect,Disconnect, Open,Close, BestIndex,Filter, Next,Eof, Column,Rowid. 2.2) NULL pointers for Update, Begin,Sync,Commit,Rollback, FindFunction,Rename, Savepoint,Release,RollbackTo. 2.3) *** ? *** Are there any other members not documented I'd need to init? 3) I call sqlite3_create_module() with module name "vtable1" 4) I call sqlite3_declare_vtab() with this statement: "CREATE TABLE foo ( x integer, y integer );" --> That one fails with ERROR 21 (lib misuse). <<<<<<<<<<<<< Did I forget a step? Do them in wrong order? Anything obvious seems wrong to you? Where should I go to get more details and fix the issue? My current implementation is rather complex and involves C++ and templates a lot. Making a "small example" would be highly time-consuming, so I'd prefer to avoid going that way if possible. Anyone can tell me where I'd find a simple functionnal vtable "hello world"? The vtable documentation is great but is missing examples, imo. Personnally, I think the vtable documentation page could benefit from one example project throughout and develop it. Something like a basic CSV vtable would probably help the masses a lot! :) Thanks for your help and time, Simon _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
