brian <brian@zijn-digital.com> writes:
> arsi@aranzo.netg.se wrote:
>> Does this mean that substr calls substring internally?? Or is it the
>> other way around?? Or are they independent of each other??
> Looks like they're pretty evenly matched.
Actually, a bit of poking into the contents of pg_proc will show you
that they are both aliases for the same C function (text_substr_no_len).
So they should be *exactly* the same speed.
regards, tom lane