From 76f412ab310554acb970a0b73c8d1f37f35548c6 Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Thu, 17 Sep 2020 16:17:27 -0400
Subject: Remove factorial operators, leaving only the factorial() function.

The "!" operator is our only built-in postfix operator.  Remove it,
on the way to removal of grammar support for postfix operators.

There is also a "!!" prefix operator, but since it's been marked
deprecated for most of its existence, we might as well remove it too.

Also zap the SQL alias function numeric_fac(), which seems to have
equally little reason to live.

Mark Dilger, based on work by myself and Robert Haas;
review by John Naylor

Discussion: https://postgr.es/m/38ca86db-42ab-9b48-2902-337a0d6b8311@2ndquadrant.com
---
 doc/src/sgml/func.sgml | 30 ------------------------------
 1 file changed, 30 deletions(-)

(limited to 'doc/src')

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index e2e618791ee..d6283a35d84 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1048,36 +1048,6 @@ repeat('Pg', 4) <returnvalue>PgPgPgPg</returnvalue>
        </para></entry>
       </row>
 
-      <row>
-       <entry role="func_table_entry"><para role="func_signature">
-        <type>bigint</type> <literal>!</literal>
-        <returnvalue>numeric</returnvalue>
-       </para>
-       <para>
-        Factorial
-        (deprecated, use <link linkend="function-factorial"><function>factorial()</function></link> instead)
-       </para>
-       <para>
-        <literal>5 !</literal>
-        <returnvalue>120</returnvalue>
-       </para></entry>
-      </row>
-
-      <row>
-       <entry role="func_table_entry"><para role="func_signature">
-        <literal>!!</literal> <type>bigint</type>
-        <returnvalue>numeric</returnvalue>
-       </para>
-       <para>
-        Factorial as a prefix operator
-        (deprecated, use <link linkend="function-factorial"><function>factorial()</function></link> instead)
-       </para>
-       <para>
-        <literal>!! 5</literal>
-        <returnvalue>120</returnvalue>
-       </para></entry>
-      </row>
-
       <row>
        <entry role="func_table_entry"><para role="func_signature">
         <literal>@</literal> <replaceable>numeric_type</replaceable>
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