/// <summary> /// Take the fields of the index and take value from the query /// </summary> /// <param name="index"> The index </param> /// <returns> The key of the index </returns> protected virtual IOdbComparable ComputeIndexKey(ClassInfoIndex index) { var attributesNames = ClassInfo.GetAttributeNames(index.AttributeIds); var constraint = Query.GetCriteria(); var values = ((IInternalConstraint)constraint).GetValues(); return(IndexTool.BuildIndexKey(index.Name, values, attributesNames)); }