Problem Note 70801: The SQL procedure displays the note “The execution of this query involves performing one or more Cartesian product joins that can not be optimized”
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When joining tables or views where the source tables are DBMS tables, performance might be adversely affected.
This issue has been noted when the SELECT statement contains one or more of the following:
- DISTINCT
- column-modifiers like LENGTH
When PROC SQL displays the following note, this issue might occur:
NOTE: The execution of this query involves performing one or more Cartesian product joins that can not be optimized.
For a related issue and workaround, see SAS Note 70515, "Columns with an unexpected length can occur because the SQL procedure might ignore the LENGTH column modifier."
Click the Hot Fix tab in this note to access the hot fix for this issue.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | Base SAS | z/OS | 9.4_M8 | 9.4 TS1M8 | ||
| z/OS 64-bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft® Windows® for x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8 Enterprise 32-bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8 Enterprise x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8 Pro 32-bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8 Pro x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8.1 Enterprise 32-bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8.1 Enterprise x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8.1 Pro 32-bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 8.1 Pro x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 10 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows 11 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2008 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2008 R2 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2008 for x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2012 Datacenter | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2012 R2 Datacenter | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2012 R2 Std | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2012 Std | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2016 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2019 | 9.4_M8 | 9.4 TS1M8 | ||||
| Microsoft Windows Server 2022 | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Enterprise 32 bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Enterprise x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Home Premium 32 bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Home Premium x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Professional 32 bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Professional x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Ultimate 32 bit | 9.4_M8 | 9.4 TS1M8 | ||||
| Windows 7 Ultimate x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| 64-bit Enabled AIX | 9.4_M8 | 9.4 TS1M8 | ||||
| 64-bit Enabled Solaris | 9.4_M8 | 9.4 TS1M8 | ||||
| HP-UX IPF | 9.4_M8 | 9.4 TS1M8 | ||||
| Linux for x64 | 9.4_M8 | 9.4 TS1M8 | ||||
| Solaris for x64 | 9.4_M8 | 9.4 TS1M8 | ||||
A fix for this issue for Base SAS 9.4_M8 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/L8X.html#70801
PROC SQL performance might be very slow when a Cartesian product joins occurs
| Type: | Problem Note |
| Priority: | high |
| Topic: | SAS Reference ==> SQL |
| Date Modified: | 2024-05-22 13:02:04 |
| Date Created: | 2024-05-20 08:34:54 |