public override ITable Evaluate(IQueryContext context)
{
ITable childTable = Child.Evaluate(context);
var dbContext = (DatabaseQueryContext)context;
var funTable = new FunctionTable((Table)childTable, functionList, nameList, dbContext);
// If no columns then it is implied the whole table is the group.
if (columns == null)
{
funTable.SetWholeTableAsGroup();
}
else
{
funTable.CreateGroupMatrix(columns);
}
return(funTable.MergeWithReference(groupMaxColumn));
}