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-rw-r--r--doc/src/sgml/func.sgml9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 03859a78eaa..7fbcdfeae56 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -12481,6 +12481,15 @@ SELECT setval('foo', 42, false); <lineannotation>Next <function>nextval</func
</para>
</tip>
+ <note>
+ <para>
+ Although <token>COALESCE</token>, <token>GREATEST</token>, and
+ <token>LEAST</token> are syntactically similar to functions, they are
+ not strictly functions, and thus cannot be used with explicit
+ <token>VARIADIC</token> array arguments.
+ </para>
+ </note>
+
<sect2 id="functions-case">
<title><literal>CASE</literal></title>