Not avaiable alias is used inside CTE without an error ------------------------------------------------------
Key: CORE-6267 URL: http://tracker.firebirdsql.org/browse/CORE-6267 Project: Firebird Core Issue Type: Bug Components: Engine Affects Versions: 3.0.5, 3.0.6 Reporter: Karol Bieniaszewski Look at this not trivial query but migrated to use only system tables to show the problem. Alias "U" is not available in the CTE "ZAWIESZENIA". If you remove whole WHERE from the main query then an error is raised. -------------------------- SQL error code = -206 Column unknown U.UMOWA_DATA_DO At line 8, column 190. --------------------------- but if you add whole where no error present. It can be releated somehow with window functions. ----------------------------------------------------------------------------------------------------------------------------- WITH DATY_ZAWIESZEN AS ( SELECT date '2020-01-01' AS DZ_OD, date '2020-01-31' AS DZ_DO FROM RDB$DATABASE ) , ZAWIESZENIA AS ( SELECT W_UZ.RDB$RELATION_ID, W_UZ.RDB$CHARACTER_SET_NAME, W_UZ.UMOWA_ID, MAXVALUE(W_UZ.ZAWIESZ_DATA_OD, W_U.UMOWA_DATA_OD) AS ZAWIESZ_DATA_OD, MINVALUE(COALESCE(W_UZ.ZAWIESZ_DATA_DO, W_DZ.DZ_DO), U.UMOWA_DATA_DO /* ------------ ALIAS "U" IS NOT AVAILABLE HERE!!!! ------------ */) AS ZAWIESZ_DATA_DO FROM (SELECT CURRENT_DATE AS ZAWIESZ_DATA_OD, CURRENT_DATE AS ZAWIESZ_DATA_DO, RDB$RELATION_ID, RDB$CHARACTER_SET_NAME, 1 AS UMOWA_ID FROM RDB$DATABASE ) W_UZ INNER JOIN (SELECT CURRENT_DATE AS UMOWA_DATA_OD FROM RDB$DATABASE ) W_U ON 1=1 INNER JOIN DATY_ZAWIESZEN W_DZ ON 1=1 ) SELECT U.UMOWA_ID FROM (SELECT CURRENT_DATE AS UMOWA_DATA_DO, 2 AS UMOWA_ID FROM RDB$DATABASE) U INNER JOIN DATY_ZAWIESZEN DZ ON 1=1 /* ------------ without this WHERE an error is raised about unknown column UMOWA_DATA_DO ------------ */ WHERE EXISTS ( SELECT * FROM ( SELECT ISLANDS.UMOWA_ID , ISLANDS.ISLAND_NR , MIN(ISLANDS.START_DATE) AS ISLAND_START_DATE , MAX(ISLANDS.END_DATE) AS ISLAND_END_DATE FROM (SELECT GROUPS.* , CASE WHEN GROUPS.PREV_END_DATE >= START_DATE THEN 0 ELSE 1 END AS IS_ISLAND_START , SUM(CASE WHEN GROUPS.PREV_END_DATE >= START_DATE THEN 0 ELSE 1 END) OVER (PARTITION BY GROUPS.UMOWA_ID ORDER BY GROUPS.RN) AS ISLAND_NR FROM (SELECT ROW_NUMBER() OVER(PARTITION BY UZ.UMOWA_ID ORDER BY UZ.ZAWIESZ_DATA_OD, COALESCE(UZ.ZAWIESZ_DATA_DO, DZ.DZ_DO)) AS RN , UZ.UMOWA_ID , UZ.ZAWIESZ_DATA_OD AS START_DATE , COALESCE(UZ.ZAWIESZ_DATA_DO, DZ.DZ_DO) AS END_DATE , LAG(COALESCE(UZ.ZAWIESZ_DATA_DO, DZ.DZ_DO), 1) OVER(PARTITION BY UZ.UMOWA_ID ORDER BY UZ.ZAWIESZ_DATA_OD, COALESCE(UZ.ZAWIESZ_DATA_DO, DZ.DZ_DO)) AS PREV_END_DATE FROM ZAWIESZENIA UZ WHERE UZ.UMOWA_ID=U.UMOWA_ID ) GROUPS ) ISLANDS GROUP BY ISLANDS.UMOWA_ID , ISLANDS.ISLAND_NR ORDER BY ISLAND_START_DATE ) X WHERE DZ.DZ_OD>=X.ISLAND_START_DATE AND DZ.DZ_DO<=X.ISLAND_END_DATE ) -- 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 Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel