doc: Document factorial function
authorPeter Eisentraut <peter@eisentraut.org>
Mon, 15 Jun 2020 06:51:46 +0000 (08:51 +0200)
committerPeter Eisentraut <peter@eisentraut.org>
Tue, 16 Jun 2020 03:04:33 +0000 (05:04 +0200)
commit4c5cf5431410f8e28fb855c892cb2880649df850
tree543ebd1550a6f2e6171bd846a870a82eaae0f32b
parent3f5863e15664757393c7a1416181fb58deac37a6
doc: Document factorial function

This has existed for a very long time, equivalent to the ! and !!
operators, but it was never documented.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/6ce1df0e-86a3-e544-743a-f357ff663f68%402ndquadrant.com
doc/src/sgml/func.sgml