On Sat, Apr 22, 2023 at 11:57:06AM -0300, Anderson Antunes wrote:
> I'm sorry for not responding earlier. She ended up falling into spam. I solved
> it by creating a specific variable in the postgresql configuration file.
>
> If it's not too much trouble, I have another question: my name is Anderson
> Antunes. I live in Brazil. I'm doing research for a master's project about
> pseudo random numbers and would like to know more information about the random
> () function used to randomly order a set of records. I tried to search through
> the site that offers the source code but I couldn't identify the exact
> implementation of this function.
Looks like random() internally is called drandom():
\x
\df+ random
List of functions
-[ RECORD 1 ]-------+-----------------
Schema | pg_catalog
Name | random
Result data type | double precision
Argument data types |
Type | func
Volatility | volatile
Parallel | restricted
Owner | postgres
Security | invoker
Access privileges |
Language | internal
--> Internal name | drandom
Description | random value
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
Embrace your flaws. They make you human, rather than perfect,
which you will never be.