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Commitb27679a

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Docs: clarify treatment of variadic functions with zero variadic arguments.
Explain that you have to use "VARIADIC ARRAY[]" to pass an empty arrayto a variadic parameter position. This was already implicit in the textbut it seems better to spell it out.Per a suggestion from David Johnston, though I didn't use his proposedwording. Back-patch to all supported branches.
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‎doc/src/sgml/xfunc.sgml

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@@ -699,6 +699,20 @@ SELECT mleast(VARIADIC ARRAY[10, -1, 5, 4.4]);
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actual argument of a function call.
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</para>
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<para>
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Specifying <literal>VARIADIC</> in the call is also the only way to
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pass an empty array to a variadic function, for example:
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<screen>
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SELECT mleast(VARIADIC ARRAY[]::numeric[]);
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</screen>
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Simply writing <literal>SELECT mleast()</> does not work because a
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variadic parameter must match at least one actual argument.
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(You could define a second function also named <literal>mleast</>,
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with no parameters, if you wanted to allow such calls.)
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</para>
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<para>
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The array element parameters generated from a variadic parameter are
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treated as not having any names of their own. This means it is not

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