Documentation fix: sum(float4) returns float4, not float8.

tglsfdc · tglsfdc · commit b640d231230c · 2014-09-07T22:40:56.000-04:00
The old claim is from my commit d06ebdb of 2000-07-17, but it seems to have been a plain old thinko; sum(float4) has been distinct from sum(float8) since Berkeley days. Noted by KaiGai Kohei. While at it, mention the existence of sum(money), which is also of embarrassingly ancient vintage.
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
@@ -11642,14 +11642,13 @@ SELECT NULLIF(value, '(none)') ...
       <entry>
        <type>smallint</type>, <type>int</type>,
        <type>bigint</type>, <type>real</type>, <type>double
-       precision</type>, <type>numeric</type>, or
-       <type>interval</type>
+       precision</type>, <type>numeric</type>,
+       <type>interval</type>, or <type>money</>
       </entry>
       <entry>
        <type>bigint</type> for <type>smallint</type> or
        <type>int</type> arguments, <type>numeric</type> for
-       <type>bigint</type> arguments, <type>double precision</type>
-       for floating-point arguments, otherwise the same as the
+       <type>bigint</type> arguments, otherwise the same as the
        argument data type
       </entry>
       <entry>sum of <replaceable class="parameter">expression</replaceable> across all input values</entry>
