Juan Miguel writes:
> Well ... but ... reading database theory books, you can see that fixed size
> records are "better" than variant size records.
Theory and practice are only the same in theory. In practice there is a
difference.
Anyway, char(30) means 30 characters, not 30 bytes. So it's not a
fixed-size record anyway. Other factors are out-of-line storage and
automatic compression of long values.
--
Peter Eisentraut peter_e(at)gmx(dot)net