[DUG]: TQuery, TUpdateSQL and Insert

[Paul Lowman]

Hi All

 

Anyone tell me how to use a TQuery with an update component to insert a new record.

 

I have managed to do it so far in the following way :

 

with dmGlobal.qryWindLog do

begin

Close;

SQL.Clear;                                                            

SQL.Add('select * from WINDDATA.DB');           

SQL.Add('where RTU_ID = 16000');                       

Open;

Insert;

FieldValues['RTU_ID'] := Self.ID;

FieldValues['LogTime'] := Self.LastPoll;

FieldValues['Direction'] := Self.WindDir;

FieldValues['Average'] := Self.WindSpdAv;

FieldValues['Peak'] := Self.WindSpdGust;

ApplyUpdates;

end;

 

OK - But I don't think that I should have to execute the TQuery first - If I set the SQL strings to empty then I throw an exception so whats the recommended way ?? I put the RTU_ID = 16000 so no records would be returned but its a kluge ...

I use this same setup (basically but no setting field for delete) to edit and delete records but use <edit> or <delete> instead of <insert>.

This seems to make sense if modifying an existing record but not for insert or delete. By the by - I found that if I do an edit on a non existent record then a new record is inserted - is this right ??

 

Paul Lowman
software/hardware developer
Lowman Consulting