It's good design. I think it will become more low overhead at part of parsing
in pgbench, because comparison of strings will be redeced(maybe). And I'd
like to remove [uniform], beacause we have to have compatibility for old
scripts, and random function always gets uniform distribution in common sense
\setrandom foo 1 10 [uniform]
\setrandom foo 1 :size gaussian 3.6
\setrandom foo 1 100 exponential 7.2
I just put "uniform" as an optional default, hence the brackets.
Otherwise, what I would have in mind if this would be designed from
\set foo 124
\set foo "string value" (?)
\set foo :variable
\set foo 12 + :shift
\set foo uniform 1 10
\set foo gaussian 1 10 4.2
\set foo exponential 1 100 5.2
or maybe functions could be repended with something like "&uniform".
But that would be for another life:-)
However, new grammer is little bit long in user script. It seems trade-off
that are visibility of scripts and user writing cost.
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