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

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The old claim is from my commit d06ebdb8d3 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.
This commit is contained in:
Tom Lane
2014-09-07 22:40:41 -04:00
parent b2de2a1172
commit 0640c1bfc0
1 changed files with 3 additions and 4 deletions
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7
doc/src/sgml/func.sgml
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@ -12248,14 +12248,13 @@ NULL baz</literallayout>(3 rows)</entry>
<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>