Fix documentation of argument type of json_agg and jsonb_agg

json_agg was originally designed to aggregate records. However, it soon
became clear that it is useful for aggregating all kinds of values and
that's what we have on 9.3 and 9.4, and in head for it and jsonb_agg.
The documentation suggested otherwise, so this fixes it.

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 1d597d4d1b1c1ebef72989e947a3321584f5402c..41b5c1bd1a3230612d14a18a784c8d3117c8be93 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -12160,15 +12160,15 @@ NULL baz</literallayout>(3 rows)</entry>
        <indexterm>
         <primary>json_agg</primary>
        </indexterm>
-       <function>json_agg(<replaceable class="parameter">record</replaceable>)</function>
+       <function>json_agg(<replaceable class="parameter">expression</replaceable>)</function>
       </entry>
       <entry>
-       <type>record</type>
+       <type>expression</type>
       </entry>
       <entry>
        <type>json</type>
       </entry>
-      <entry>aggregates records as a JSON array of objects</entry>
+      <entry>aggregates values as a JSON array</entry>
      </row>
 
      <row>