Allow unused Common Table Expressions -------------------------------------
Key: CORE-5674 URL: http://tracker.firebirdsql.org/browse/CORE-5674 Project: Firebird Core Issue Type: Improvement Components: Engine Reporter: Vlad Khorsun When fixing bug CORE-1793 unused CTEs was forbidden - it was simplest solution to avoid crash in the engine. Crash happens due to uninitialized input parameters as unused CTE is not handled by syntax analyzer at all. But it is too stong limitation and users complains about it (not often but anyway). Improvement is to allow queries with unused CTEs and convert error "CTE "XXX" is not used in query" into warning. Also, it will handle unused CTEs by syntax analyzer and catch all errors, for example WITH RECURSIVE X AS (SELECT R.RDB$RELATION_NAME FROM RDB$RELATIONS1 R WHERE R.RDB$RELATION_ID = 1), Y AS (SELECT R.RDB$RELATION_NAME FROM RDB$RELATIONS R WHERE R.RDB$RELATION_ID = :ID2) SELECT * FROM Y currently works despite of reference on non-existing table RDB$RELATIONS1 in CTE X -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tracker.firebirdsql.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel