Mention cube root.

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 6cc162bb7a85fe7f7c7b0f5a8e24fb4e1c353ae7..67b8adaafb10fdf7a188486044bd48b985ef184e 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -141,6 +141,12 @@
        <entry>square root</entry>
        <entry>sqrt(2.0)</entry>
        </row>
+       <row>
+       <entry>cbrt(float8)</entry>
+       <entry>float8</entry>
+       <entry>cube root</entry>
+       <entry>cbrt(27.0)</entry>
+       </row>
        <row>
        <entry>trunc(float8)</entry>
        <entry>float8</entry>