Fixes are available
DB2 Version 9.1 Fix Pack 4a for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 4 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 7 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 5 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 6 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 6a for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 7a for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 8 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 9 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 10 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 11 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12 for Linux, UNIX and Windows
APAR status
Closed as program error.
Error description
fix to generate implied predicate with JOIN clause Repro: create table a (a1 varchar(25),a2 varchar(25),a3 varchar(25),a4 varchar(25),a5 varchar(25),a6 varchar(25), a7 varchar(25), a8 varchar(25));create table b (b1 varchar(25),b2 varchar(25),b3 varchar(25),b4 varchar(25),b5 varchar(25),b6 varchar(25), b7 varchar(25), b8 varchar(25));create table c (c1 varchar(25),c2 varchar(25),c3 varchar(25),c4 varchar(25),c5 varchar(25),c6 varchar(25), c7 varchar(25), c8 varchar(25));create table d (d1 varchar(25),d2 varchar(25),d3 varchar(25),d4 varchar(25),d5 varchar(25),d6 varchar(25), d7 varchar(25), d8 varchar(25));create table e (e1 varchar(25),e2 varchar(25),e3 varchar(25),e4 varchar(25),e5 varchar(25),e6 varchar(25), e7 varchar(25), e8 varchar(25));create table f (f1 varchar(25),f2 varchar(25),f3 varchar(25),f4 varchar(25),f5 varchar(25),f6 varchar(25), f7 varchar(25), f8 varchar(25));SELECT *FROM (((A left join B on (A.a1 = B.b1)) inner join C on (A.a2 = C.c2)) left join D on (A.a1 = D.d1)) left join E on (A.a3 = E.e3)WHERE ((((((C.c4 != 'ATTRIBUTION') and (D.d5 = 'PRO')) and (e.e6 in ('NA SCP SEC','NA CCG MGMT','NA CCG EITF'))) and (A.a7 in ('PXUA','PXUE','PXUN','PXSA','PXSE','PXSN','PXRA','PXRN', 'PXRE','MBSN','COUN','COUE','COUA','FAUN','FAUE','SBUL','QUAN')) )or (A.a1 = '08300537')) or (A.a1 = '08800P76')) AND (((A.a8 = '2006-04-28') and (((C.c4 = 'TRADING') and (C.c5 = 'DAILY')) and (C.c5 not in ('PRIMARY SYNDICATE', 'SECONDARY SYNDICATE')))) OR ((A.a8 = '2006-03-31') and ((C.c4 = 'DIVIDENDS') and (C.c5 = 'DAILY'))) OR ((A.a8 = '2006-02-28') and ((C.c4 = 'COUPON') and (C.c5 = 'DAILY'))) OR ((A.a8 = '2006-01-31') and (((C.c4 in ('FINANCE','GVFINANCE','DEFINANCE','LTDFINANCE','REPOINT','REPOF EE')) and (C.c5 = 'DAILY')) and (C.c5 != 'SEC LENDING FEE'))) OR ((A.a8 = '2005-12-30') and (((C.c4 = 'TRADING') and (C.c5 = 'MONTH TO DATE')) and (C.c5 not in ('PRIMARY SYNDICATE','SECONDARY SYNDICATE')))) OR ((A.a8 = '2005-11-30') and ((C.c4 = 'DIVIDENDS') and (C.c5 = 'MONTH TO DATE'))) OR ((A.a8 = '2005-10-31') and ((C.c4 = 'COUPON') and (C.c5 = 'MONTH TO DATE'))) OR ((A.a8 = '2005-09-30') and (((C.c4 in ('FINANCE','GVFINANCE','DEFINANCE','LTDFINANCE','REPOINT','REPOF EE')) and (C.c5 = 'MONTH TO DATE')) and (C.c5 != 'SEC LENDING FEE'))) OR ((A.a8 = '2005-08-31') and (((C.c4 = 'TRADING') and (C.c5 = 'YEAR TO DATE')) and (C.c5 not in ('PRIMARY SYNDICATE','SECONDARY SYNDICATE')))) OR ((A.a8 = '2005-07-29') and ((C.c4 = 'DIVIDENDS') and (C.c5 = 'YEAR TO DATE'))) OR ((A.a8 = '2005-06-30') and ((C.c4 = 'COUPON') and (C.c5 = 'YEAR TO DATE'))) OR ((A.a8 = '2005-05-31') and ((C.c4 in ('FINANCE','GVFINANCE','DEFINANCE', 'LTDFINANCE','REPOINT','REPOFEE')) and (C.c5 = 'YEAR TO DATE')) and (C.c5 != 'SEC LENDING FEE'))); a new mode to set the selectivity, DB2_PRED_FACTORIZE=EXTEND
Local fix
In short, we only set selectivity=1.0 on the new implied predicate as default, if we want to make it applied as existing implied predicate in optimizer, do db2set 2_PRE DB D_FACTORIZE=EXTEND. Note that is registery variable control is only for testing and special build, we will not be able to suport this in the product. Check CRM for more details.
Problem summary
FIX TO GENERATE IMPLIED PREDICATE WITH JOIN CLAUSE
Problem conclusion
APAR is fixed in v9.1
Temporary fix
LOCAL FIX: In short, we only set selectivity=1.0 on the new implied predicate as default, if we want to make it applied as existing implied predicate in optimizer, do db2set 2_PRE DB D_FACTORIZE=EXTEND. Note that is registery variable control is only for testing and special build, we will not be able to suport this in the product.
Comments
APAR Information
APAR number
IY95097
Reported component name
DB2 DPF
Reported component ID
5724N7400
Reported release
910
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2007-02-19
Closed date
2007-12-05
Last modified date
2008-02-11
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
DB2 DPF
Fixed component ID
5724N7400
Applicable component levels
R910 PSY
UP
Document Information
Modified date:
08 January 2022