Column width according cell content


I have another width problem. This time with the table component. It is placed into a container which has undefined size. The table also has undefined size. The column width is according column header but the cell content is for some columns usually larger. There is a lot of unused window space to the right.
Do I have to set column width or is there some feature other I can use?
I cannot use sizefull since the component is placed in undefined size container. Setting fix width doesnt sound very good to me.