Interesting, thanks for posting,I wish Postgres would add a native rational type to core, would be far more useful than the umpteen other esoteric types they have. How battle tested is your rational number datatype? I just use 2 columns for fractions and some udf’s, is there a huge advantage with a single column? Did you look at the pgmp extension includes !mpq rational type based on GMP library? Looks v powerful but License put me off.