You could try to add spaces as a prefix, and then take the rightmost n characters, e.g.:
selectright(space(10) + rtrim('hi'), 10)
union all
selectright(space(10) + rtrim('hello'), 10)
The result is:
----------
hi
hello
Regards,
Andras
Andras Belokosztolszki, MCPD, PhD
GoldenGate Software