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Problem Note 65563: You encounter performance problems when a query passed to a database does not include a WHERE clause

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In Base SAS® software, a performance issue might occur when you run an SQL procedure query and the following conditions exist:

  • You are running with Unicode SAS.
  • You create VIEW1 in which a database table is being queried.
  • You create VIEW2 in which a SAS data set is being queried.
  • You create VIEW3 in which VIEW1 is being unioned with VIEW2.
  • You create VIEW4 in which a database table is joined with VIEW3 in which the join criteria are based on a character variable.
  • You create a data set in which VIEW4 is queried.

There are two workarounds for this issue:

  • Create a table instead of VIEW3 (step where the two views were unioned together).
  • Add the DBCLIENT_MAX_BYTES=1 option to the LIBNAME statement.

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



Operating System and Release Information

Product FamilyProductSystemSAS Release
ReportedFixed*
SAS SystemBase SASz/OS9.4 TS1M6
z/OS 64-bit9.4 TS1M6
Microsoft® Windows® for x649.4 TS1M6
Microsoft Windows 8 Enterprise 32-bit9.4 TS1M6
Microsoft Windows 8 Enterprise x649.4 TS1M6
Microsoft Windows 8 Pro 32-bit9.4 TS1M6
Microsoft Windows 8 Pro x649.4 TS1M6
Microsoft Windows 8.1 Enterprise 32-bit9.4 TS1M6
Microsoft Windows 8.1 Enterprise x649.4 TS1M6
Microsoft Windows 8.1 Pro 32-bit9.4 TS1M6
Microsoft Windows 8.1 Pro x649.4 TS1M6
Microsoft Windows 109.4 TS1M6
Microsoft Windows Server 2012 Datacenter9.4 TS1M6
Microsoft Windows Server 2012 R2 Datacenter9.4 TS1M6
Microsoft Windows Server 2012 R2 Std9.4 TS1M6
Microsoft Windows Server 2012 Std9.4 TS1M6
Microsoft Windows Server 20169.4 TS1M6
Microsoft Windows Server 20199.4 TS1M6
Windows 7 Enterprise 32 bit9.4 TS1M6
Windows 7 Enterprise x649.4 TS1M6
Windows 7 Home Premium 32 bit9.4 TS1M6
Windows 7 Home Premium x649.4 TS1M6
Windows 7 Professional 32 bit9.4 TS1M6
Windows 7 Professional x649.4 TS1M6
Windows 7 Ultimate 32 bit9.4 TS1M6
Windows 7 Ultimate x649.4 TS1M6
64-bit Enabled AIX9.4 TS1M6
64-bit Enabled Solaris9.4 TS1M6
HP-UX IPF9.4 TS1M6
Linux for x649.4 TS1M6
Solaris for x649.4 TS1M6
* 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.