diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/func.sgml | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 37860996a6e..90d67f1acfd 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -1136,11 +1136,15 @@ </table> <para> - The characteristics of the values returned by - <literal><function>random()</function></literal> depend - on the system implementation. It is not suitable for cryptographic - applications; see <xref linkend="pgcrypto"/> module for an alternative. - </para> + The <function>random()</function> function uses a simple linear + congruential algorithm. It is fast but not suitable for cryptographic + applications; see the <xref linkend="pgcrypto"/> module for a more + secure alternative. + If <function>setseed()</function> is called, the results of + subsequent <function>random()</function> calls in the current session are + repeatable by re-issuing <function>setseed()</function> with the same + argument. + </para> <para> Finally, <xref linkend="functions-math-trig-table"/> shows the |