Em sex., 28 de abr. de 2023 às 15:47, Bruce Momjian <bruce@momjian.us> escreveu:
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
