Recursive SQL giving ORA-01790

Question

Using Oracle 11g release 2, the following query gives an ORA-01790: expression must have same datatype as corresponding expression:

with intervals(time_interval)         


        

Answer 1

I have no idea about the type mismatch, but here is an alternative method to accomplish what I think you want (which works in 10gr2):

select base_time + numtodsinterval( 10*(level-1), 'Minute')
from (select trunc(systimestamp) base_time from dual)
connect by base_time + numtodsinterval( 10*(level-1), 'Minute') < systimestamp