Incorrect check for nested CTE
------------------------------
Key: CORE-6100
URL: http://tracker.firebirdsql.org/browse/CORE-6100
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.4, 3.0.5
Reporter: Karol Bieniaszewski
Firebird incorrectly check for nested CTE.
Below query have not nested CTE
WITH X AS
(
SELECT 6 AS NUMBER FROM RDB$DATABASE
)
SELECT * FROM RDB$RELATIONS R
WHERE
NOT EXISTS(
WITH Y AS
(
SELECT 6 AS NUMBER FROM RDB$DATABASE
)
SELECT * FROM Y INNER JOIN RDB$RELATION_FIELDS RF ON 1=1 WHERE
RF.RDB$RELATION_NAME=R.RDB$RELATION_NAME AND RF.RDB$FIELD_POSITION>Y.NUMBER
)
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