Horton

Re: [PATCH] random_normal function

Justin Pryzby <pryzby@telsasoft.com>

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From: Justin Pryzby <pryzby@telsasoft.com>
To: Paul Ramsey <pramsey@cleverelephant.ca>
Cc: pgsql-hackers@postgresql.org
Date: 2022-12-08T22:46:23Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Round off random_normal() test results one more decimal place.

  2. Remove pg_regress' never-documented "ignore" feature.

  3. Upgrade the random.sql regression test.

  4. Invent random_normal() to provide normally-distributed random numbers.

On Thu, Dec 08, 2022 at 01:53:23PM -0800, Paul Ramsey wrote:
> Just a utility function to generate random numbers from a normal
> distribution. I find myself doing this several times a year, and I am
> sure I must not be the only one.
> 
> random_normal(stddev float8 DEFAULT 1.0, mean float8 DEFAULT 0.0)

+++ b/src/backend/catalog/system_functions.sql
@@ -620,6 +620,13 @@ CREATE OR REPLACE FUNCTION
  STABLE PARALLEL SAFE
  AS 'sql_localtimestamp';
 
+CREATE OR REPLACE FUNCTION
+  random_normal(stddev float8 DEFAULT 1.0, mean float8 DEFAULT 0.0)
+RETURNS float8
+LANGUAGE INTERNAL
+STRICT VOLATILE PARALLEL SAFE
+AS 'make_interval';

I guess make_interval is a typo ?

This is causing it to fail tests:
http://cfbot.cputube.org/paul-ramsey.html

BTW you can run the same tests as CFBOT does from your own github
account; see:
https://www.postgresql.org/message-id/20221116232507.GO26337@telsasoft.com

-- 
Justin