Symptom
When running 'alter table' on a number of tables, it is noted some perform better (using a table scan) than other tables (using an index scan). As the 'alter table' command is not a SQL query , for which the performance can be influenced by user hints or statistics, how does ASE decide the access method when running 'alter table' ?
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Environment
- SAP Adaptive Server Enterprise (ASE) 12.5
- SAP Adaptive Server Enterprise (ASE) 15.0
- SAP Adaptive Server Enterprise (ASE) 15.5
- SAP Adaptive Server Enterprise (ASE) 15.7
Product
SAP Adaptive Server Enterprise all versions
Keywords
alter table, optimizer,table scan , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , How To
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