SAP Knowledge Base Article - Preview

2431887 - select COUNT( distinct column_name ) runs slow -- SAP IQ

Symptom

Aggregation query with:

  • count( distinct columnname in projection list
  • Sample for illustration
    select COUNT( distinct column_name ) from a_table

Only single thread in "Threads diagram" in html query plan


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Environment

SAP IQ 16.0

Product

SAP IQ 16.0

Keywords

count , distinct , performance , query_plan_as_html , single threaded  , KBA , BC-SYB-IQ , Sybase IQ , Bug Filed

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