Add documentation cross-reference for JSON functions.

Thom Brown

diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index 7e4107cce80714e299abce44e9666f6be5580f82..afc82a25baf12cf7009ab4ac08e84f7245aa4ccf 100644 (file)
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -4185,7 +4185,8 @@ SET xmloption TO { DOCUMENT | CONTENT };
     The json data type can be used to store JSON data.  Such
     data can also be stored as text, but the
     json data type has the advantage of checking that each
-    stored value is a valid JSON value.
+    stored value is a valid JSON value.  There are also related support
+    functions available; see .