SAP Knowledge Base Article - Preview

2854142 - Table scan is chosen if LIKE clause concatenates parameters or variables - SAP ASE

Symptom

  • ASE optimizer may choose a table scan or an unsuitable index scan if a LIKE predicate in WHERE clause contains :
    • a concatenation of parameters (e.g. LIKE ? + ? or LIKE ? || ?) in a prepared statement
    • or a concatenation of local variables (e.g. LIKE @var1 + @var2 or LIKE @var1 || @var2) in a batch query.


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Environment

  • SAP Adaptive Server Enterprise 15.7
  • SAP Adaptive Server Enterprise 16.0

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0

Keywords

757177, CR#757177, CR757177, LIKE optimization , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , Problem

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