john snow <ofbizfanster(at)gmail(dot)com> writes:
> when you say char-type values, do you include varchar?
No. varchar and text consider trailing spaces to be significant.
To my mind, there are very few situations where char(n) is actually
a reasonable choice of datatype. Maybe for US state abbreviations
or the like. If you're even asking this question, it suggests that
you ought to be using varchar/text.
char(n) basically exists to support fixed-field-width data designs that
should have died along with the punched cards that inspired them.
regards, tom lane