It was definitely useful to debug the double/int type stuff within
expressions when writing a non trivial pgbench script. It is probably less
interesting if there are only integers.
After looking again at the code, I remembered why double are useful: there
are needed for random exponential & gaussian because the last parameter is
I do not care about the sqrt, but double must be allowed to keep that, and
the randoms are definitely useful for a pgbench script. Now the patch may
just keep double constants, but it would look awkward, and the doc must
explain why 1.3 and 1+2 are okay, but not 1.3 + 2.4.
So I'm less keen at removing double expressions, because it removes a key
feature. If it is a blocker I'll go for just the constant, but this looks
to me like a stupid compromise.
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