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psql \dX: list extended statistics objects
The new command lists extended statistics objects, possibly with their sizes. All past releases with extended statistics are supported. Author: Tatsuro Yamada Reviewed-by: Julien Rouhaud, Alvaro Herrera, Tomas Vondra Discussion: https://postgr.es/m/c027a541-5856-75a5-0868-341301e1624b%40nttcom.co.jp_1
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@ -1918,6 +1918,28 @@ testdb=>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>\dX [ <link linkend="app-psql-patterns"><replaceable class="parameter">pattern</replaceable></link> ]</literal></term>
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<listitem>
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<para>
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Lists extended statistics.
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If <replaceable class="parameter">pattern</replaceable>
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is specified, only those extended statistics whose names match the
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pattern are listed.
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If <literal>+</literal> is appended to the command name, each extended
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statistics is listed with its size.
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</para>
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<para>
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The column of the kind of extended stats (e.g. Ndistinct) shows some statuses.
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"requested" means that it needs to collect statistics by <link
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linkend="sql-analyze"><command>ANALYZE</command></link>.
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"built" means <link linkend="sql-analyze"><command>ANALYZE</command></link> was
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finished, and the planner can use it. NULL means that it doesn't exists.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>\dy[+] [ <link linkend="app-psql-patterns"><replaceable class="parameter">pattern</replaceable></link> ]</literal></term>
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