[yunqa.de] Re: disqlite - adding functions
- From: Delphi Inspiration <delphi@xxxxxxxx>
- To: yunqa@xxxxxxxxxxxxx
- Date: Tue, 24 Jun 2008 09:09:53 +0200
Clyde wrote:
>However, I am having problems when I try to add the sample function into my
>test application.
>
>My application is forms based and not a console one so perhaps that has
>something to do with it?
Not at all. You can use the same function callback in both GUI and console
applications.
>Anyway the problem is when I try to register the sample "pos" fucntion with
>this code:
>
> sqlite3_create_function(
> DB1.handle, // Handle to database
> 'POS', // The new function's name.
> 2, // Number of function arguments.
> SQLITE_UTF8, // Preferred string encoding for function callback.
> nil, // User data.
> Pos_Function_Callback, // Function callback
> nil, // Step callback, not needed.
> nil); // Final callback, not needed.
>
>I get the following compile error
>
>[Error] Unit1.pas(332): Incompatible types: 'sqlite3_context' and 'Pointer'
>
>line 332 is Pos_Function_Callback, // Function callback
>
>Any idea what the problem might be?
I assume you might use wrong parameter types. Does your Pos_Function_Callback
function look like this:
procedure Some_Function_Callback(
pCtx: sqlite3_context; // <-- Wrong "Pointer" here in your code?
nArgs: Integer;
Args: PPointerArray);
I need to see more code to help further.
Ralf
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