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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2022-07-23 19:00:30 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2022-07-23 19:00:30 -0400 |
| commit | 31d5354cb148c6aa90014f62d3a4752adeebd51a (patch) | |
| tree | 800928456404a9457b167ed8a959b3c11b9d84fc /src/backend/executor/nodeProjectSet.c | |
| parent | fee0165fc1cfaf4ac0052c4554810e46c02dd70c (diff) | |
| download | postgresql-31d5354cb148c6aa90014f62d3a4752adeebd51a.tar.gz postgresql-31d5354cb148c6aa90014f62d3a4752adeebd51a.zip | |
Doc: improve documentation about random().
We didn't explicitly say that random() uses a randomly-chosen seed
if you haven't called setseed(). Do so.
Also, remove ref/set.sgml's no-longer-accurate (and never very
relevant) statement that the seed value is multiplied by 2^31-1.
Back-patch to v12 where set.sgml's claim stopped being true.
The claim that we use a source of random bits as seed was debatable
before 4203842a1, too, so v12 seems like a good place to stop.
Per question from Carl Sopchak.
Discussion: https://postgr.es/m/f37bb937-9d99-08f0-4de7-80c91a3cfc2e@sopchak.me
Diffstat (limited to 'src/backend/executor/nodeProjectSet.c')
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