Friday, October 5, 2012

Sybase to SQL Server MIgration Issues

Avoid using Emulated function:

         When the migration of objects by Using SSMA, emulated functions would have created in SYSDB by SSMA and those functions will be referred to replace the SQL Server system functions in the database objects. These emulated functions, may affect the performance of the query.
To avoid the performance impact, should use the below changes. Emulated function call has been replaced with actual statement change using case statement (Like If @start <0 for substring) or by making necessary platform specific parameter alteration (Like Proper SQL server specific  datepart ).

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