Error reuse reference cursor if one of the query field is computed using a
subquery
-----------------------------------------------------------------------------------
Key: CORE-5373
URL: http://tracker.firebirdsql.org/browse/CORE-5373
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.1
Reporter: Simonov Denis
SET SQL DIALECT 3;
SET TERM ^ ;
CREATE PROCEDURE SP_TESP
RETURNS (
RESULT SMALLINT)
AS
BEGIN
SUSPEND;
END^
SET TERM ; ^
CREATE TABLE TEST (
ID SMALLINT
);
SET TERM ^ ;
ALTER PROCEDURE SP_TESP
RETURNS (
RESULT SMALLINT)
AS
begin
result = 0;
for select t.id,(select t.id+1 from rdb$database) as id_1
from test t
as cursor c
do begin
if (c.id_1 between 0 and 1) then result=1;
-- if (c.id_1 between 2 and 3) then result=2; -- If uncommented error occurs.
end
suspend;
end^
SET TERM ; ^
COMMIT WORK;
If you uncomment the line indicated, the error occurs when compiling procedure:
Unsuccessful execution caused by system error that does not preclude successful
of subsequent statements. Error while parsing procedure SP_TEST`s BLR. invalid
request BLR at offset 181. context already in use (BLR error).
The reason to use a subquery (select t.id + 1 from rdb$database), if you remove
it or replace the function of error disappears.
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