This is a very vague question. I'd suggest it's worth learning pl/pgsql
simply because it's designed to solve a set of problems common in
database systems. The design makes it reasonably efficient for
implementing solutions in this area.
The problem you're (just barely) describing below is something I'd
probably try to address with pure sql stored procedures. Remember, the
database already has numeric support capabilities. If you stick to pure
sql procedures, not only do you remain portable, but you may be able to
gain some wins in the planner.
I also suggest that if you're attempting to iterate in Python, then you
might not be understanding how an integrated procedural language is
intended to be used.
Wolfgang Keller wrote:
> I was wondering whether it is worth for me to learn PL/Pgsql, given the
> support of Python in Postgresql. The latter (Python) is the only
> programming language I've learned voluntarily in my whole life, i.e.
> without being obliged to do so, you know. ;-)
> So, what things can be done in PL/Pgsql which can't be done in PL/Python
> (and vice-versa)? And, how do both compare in terms of runtime efficiency
> Apart from typical "ERP-like" work, the applications I am planning to use
> Postgresql for involve storage and (numeric) processing of quite
> significant amounts of (binary) measurement data. Specifically, "hacking"
> long streams of binary data fed into a database in batch mode into
> individual OPC-conform triplets, among others. So I thought the numeric
> module and iterator feature in Python would be quite useful...
> Best regards
> Wolfgang Keller
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