DB2 - Problembeschreibung
Problem IC74206 | Status: Geschlossen |
DB2 INSTANCE MAY ABEND IF QUERY HAS FACT TABLE JOINING DIMENSION TABLE ON PRIMARY FOREIGN KEY AND FACT TABLE HAS UNIQUE COLUMN. | |
Produkt: | |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 | |
Problembeschreibung: | |
An example that can hit the problem: -- ddl create table dim (pk int not null primary key, uk int); create unique index dimuk on dim(uk); create table fact (fk int, uk varchar(4)); create unique index factuk on fact(uk); ALTER TABLE fact ADD CONSTRAINT ri FOREIGN KEY (fk) REFERENCES dim (pk); -- query select fact.uk from fact, dim where fk=pk and fact.uk = 'abc' order by dim.uk; Necessary conditions: 1. There is primary key table and foreign key table. Query has join predicate between primary key and foreign key. 2. Primary key table has unique key, and the unique key is present in query ORDER BY clause. 3. Foreign key table also has unique key. The unique key column type is varchar or vargraphic, and it is involved in a local equality predicate. 4. Query select list has no column from primary key table. | |
Problem-Zusammenfassung: | |
An example that can hit the problem: -- ddl create table dim (pk int not null primary key, uk int); create unique index dimuk on dim(uk); create table fact (fk int, uk varchar(4)); create unique index factuk on fact(uk); ALTER TABLE fact ADD CONSTRAINT ri FOREIGN KEY (fk) REFERENCES dim (pk); -- query select fact.uk from fact, dim where fk=pk and fact.uk = 'abc' order by dim.uk; Necessary conditions: 1. There is primary key table and foreign key table. Query has join predicate between primary key and foreign key. 2. Primary key table has unique key, and the unique key is present in query ORDER BY clause. 3. Foreign key table also has unique key. The unique key column type is varchar or vargraphic, and it is involved in a local equality predicate. 4. Query select list has no column from primary key table. | |
Local-Fix: | |
Remove order by clause, because query returns at most one row. | |
verfügbare FixPacks: | |
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows | |
Lösung | |
First fixed in DB2 Version 9.7 Fixpack 5. | |
Workaround | |
Remove order by clause, because query returns at most one row. | |
Weitere Daten | |
Datum - Problem gemeldet : Datum - Problem geschlossen : Datum - der letzten Änderung: | 28.01.2011 07.12.2011 07.12.2011 |
Problem behoben ab folgender Versionen (IBM BugInfos) | |
9.7.FP5 | |
Problem behoben lt. FixList in der Version | |
9.7.0.5 |