1955776 - Optimizer generates different query plans for the same query run by different users- SAP ASE | SAP Knowledge Base Article

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1955776 - Optimizer generates different query plans for the same query run by different users- SAP ASE

Symptom

  • There are 2 users such as userA and userB, which are bound to different temporary database in different sizes.
  • These 2 users run the same query, but their query plans are different. One of the query plans may be slower than the other.
  • "conserve_tempdb_space" optimization criteria is explicitly ON, or  "optimizer level" configuration parameter is ase1503esd2 or above (including ase_current).

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Environment

  • SAP Adaptive Server Enterprise version (ASE) 15.7 ESD#1 or later
  • SAP Adaptive Server Enterprise version (ASE) 16.0

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0

Keywords

conserve_tempdb_space, max resource granularity, tempdb, optimizer , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Product Enhancement

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