OPTIM_OR_DISTINCT 
The
special database parameter OPTIM_OR_DISTINCT denotes how the optimization algorithm changes if you are using OR search conditions in SQL statements.
- Low OPTIM_OR_DISTINCT values: You should use low values for OR search conditions if you want DISTINCT hitlists where no lines are duplicated.
- High OPTIM_OR_DISTINCT values: You should use high values for OR search conditions if you do not want DISTINCT hitlists.