In SAS^® 9.1.3, performance problems can occur when you use an ORDER BY clause in PROC SQL. More Read and Write cycles occur in PROC SQL with an ORDER BY clause than occur when you use a DATA step and the SORT procedure to accomplish the same task.

Select the Hot Fix tab in this note to access the hot fix for this issue.

Operating System and Release Information

Product Family	Product	System	SAS Release
			Reported	Fixed*
SAS System	Base SAS	z/OS	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft® Windows® for 64-Bit Itanium-based Systems	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows Server 2003 Datacenter 64-bit Edition	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows Server 2003 Enterprise 64-bit Edition	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows XP 64-bit Edition	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft® Windows® for x64	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows 2000 Advanced Server	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows 2000 Datacenter Server	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows 2000 Server	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows 2000 Professional	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows NT Workstation	9.1 TS1M3 SP4
		Microsoft Windows Server 2003 Datacenter Edition	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows Server 2003 Enterprise Edition	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows Server 2003 Standard Edition	9.1 TS1M3 SP4	9.2 TS1M0
		Microsoft Windows XP Professional	9.1 TS1M3 SP4	9.2 TS1M0
		Windows Vista	9.1 TS1M3 SP4	9.2 TS1M0
		64-bit Enabled AIX	9.1 TS1M3 SP4	9.2 TS1M0
		64-bit Enabled HP-UX	9.1 TS1M3 SP4	9.2 TS1M0
		64-bit Enabled Solaris	9.1 TS1M3 SP4	9.2 TS1M0
		HP-UX IPF	9.1 TS1M3 SP4	9.2 TS1M0
		Linux	9.1 TS1M3 SP4	9.2 TS1M0
		Linux on Itanium	9.1 TS1M3 SP4	9.2 TS1M0
		OpenVMS Alpha	9.1 TS1M3 SP4	9.2 TS1M0
		Tru64 UNIX	9.1 TS1M3 SP4	9.2 TS1M0

* For software releases that are not yet generally available, the Fixed Release is the software release in which the problem is planned to be fixed.

The following statements can be used to control whether the additional read/write cycle occurs.

---

/* to invoke the feature */ 

  %let sys_sqldirectsort = 1; 

/* to disable the feature */ 

  %let sys_sqldirectsort = 0; 

A fix for SAS 9.1.3 (9.1 TS1M3) for this issue is available at:

http://www.sas.com/techsup/download/hotfix/e9_sbcs_prod_list.html#030893

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A fix for SAS 9.1.3 (9.1 TS1M3) with Asian Language Support (DBCS) for this issue is available at:

http://www.sas.com/techsup/download/hotfix/e9_dbcs_prod_list.html#030893

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Type:	Problem Note
Priority:	high

Date Modified:	2009-09-14 13:11:20
Date Created:	2008-01-09 13:00:57