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2530487 - Error 257 "Implicit conversion from datatype..." in SELECT query on multiple views with UNION ALL and LEFT JOINS - SAP ASE


  • A SELECT statement on multiple views with UNION ALL and LEFT JOINs generates:

Error 257 Implicit conversion from datatype 'VARCHAR' to 'INT' is not allowed.  Use the CONVERT function to run this query.

  • The issue only happens with  LEFT JOINs  as with RIGHT JOIN no error has been seen.  



  • SAP Adaptive Server Entreprise (ASE) 15.7
  • SAP Adaptive Server Entreprise (ASE) 16.0


SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0


Error: 257, view with union all, split, separate, query failing , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem

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