TIBScript and local variables - sql

Question

I am working with Delphi 7 and Firebird 2.0. In my application I am using TIBScript components. The problem arises when I use local variables in the script. Firebird requires the names of local variables to be preceded by a colon in some cases. That’s where the problem lies in. The application stops showing the error message:
Dynamic SQL Error
SQL error code = -104
Token unknown - line 4, column 66
?
The token in question is the colon. Here is how my script looks like:
SET TERM ^ ;
EXECUTE BLOCK AS
DECLARE test_variable INT;
BEGIN
SELECT tt.id FROM test_table tt WHERE tt.name LIKE 'abc%' INTO :test_variable;
INSERT INTO test_table2(id, test_column)
VALUES(1, :test_variable);
INSERT INTO test_table3(id, test_column)
VALUES(1, :test_variable);
...
END^
SET TERM ; ^
The same script executes without any errors when run from IBExpert.
How can I use local variables in a TIBScript? Any help would be appreciated!
I want to add that this problem occurs only with variables inside an EXECUTE BLOCK construct. There is no problem with local variables in stored procedure and trigger definitions.

Answer 1

After executing the method TIBSQL.PreprocessSQL (Unit IBX.IBSQL line 2362), parameters marked with ":" on the front are replaced by "?". So you should use parameters without ":". Also I think it should be removed SET TERM. Instead, to set terminator value use the IBScript.Terminator property.
P.S. I watched unit IBX.IBSQL in Delphi 10.3 Rio.
this
EXECUTE BLOCK AS
DECLARE test_variable INT;
BEGIN
SELECT tt.id FROM USERS tt WHERE (tt.fname LIKE 'abc%') INTO test_variable;
END;
is executed properly when
IBScript.Terminator = ^;
Edit:
You can't execute INSERT with parameters in EXECUTE BLOCK using TIBScript component.
As Mark Rotteveel comented:
Unfortunately removing the colon is only an option in the into clause
in not with other occurrences of local variables or parameters.