doc: Add random_zipfian to list of random functions with argument.

Author: Ildar Musin
Reviewed-By: Fabian Coelho
Discussion: https://postgr.es/m/6376ed81-3ce8-14f4-4758-099872f4ce7d@postgrespro.ru

diff --git a/doc/src/sgml/ref/pgbench.sgml b/doc/src/sgml/ref/pgbench.sgml
index 59b573b50116fd603da43dafd48490ec4b9b5390..5f28023799121c3438705b7bf2ae41eb69ef2948 100644 (file)
--- a/doc/src/sgml/ref/pgbench.sgml
+++ b/doc/src/sgml/ref/pgbench.sgml
@@ -1332,9 +1332,10 @@ pgbench  options  d
    
     The random function generates values using a uniform
     distribution, that is all the values are drawn within the specified
-    range with equal probability. The random_exponential and
-    random_gaussian functions require an additional double
-    parameter which determines the precise shape of the distribution.
+    range with equal probability. The random_exponential, 
+    random_gaussian and random_zipfian
+    functions require an additional double parameter which determines the precise
+    shape of the distribution.