free query if it exists
Posted by:
Jim Sawyer
Date: November 20, 2019 08:35AM
Assume I have a query
dQuery := TFDQuery.Create( AConnection );
with dQuery do
begin
Connection := AConnection;
SQL.Add( 'Select * from MyTable' );
Open;
end;
This query may or may not have been opened at at time when I want to exit a procedure. If it has been created I want to
dQuery.Free;
However, if it has not been created, this last command will bomb.
Is there a procedure something like
if dQuery exists
dQuery.Free;
Please tell me what I need to replace the "if dQuery exists" with inorder to make "dQuery.Free" conditional on whether it exists or not.
Thank you,
Jim Sawyer
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free query if it exists
November 20, 2019 08:35AM
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