be a <literal>CustomScan</> object, which the callback must allocate and

initialize. See <xref linkend="custom-scan-plan"> for more details.

</para>

<para>

<programlisting>

void (*TextOutCustomPath) (StringInfo str,

const CustomPath *node);

</programlisting>

Generate additional output when <function>nodeToString</> is invoked on

this custom path. This callback is optional. Since

<function>nodeToString</> will automatically dump all fields in the

structure that it can see, including <structfield>custom_private</>, this

is only useful if the <structname>CustomPath</> is actually embedded in a

larger struct containing additional fields.

</para>

</sect2>

</sect1>

WRITE_NODE_FIELD(custom_private);

appendStringInfoString(str," :methods ");

_outToken(str,node->methods->CustomName);

if (node->methods->TextOutCustomPath)

node->methods->TextOutCustomPath(str,node);

}

List*tlist,

List*clauses,

List*custom_plans);

void(*TextOutCustomPath) (StringInfostr,

conststructCustomPath*node);

}CustomPathMethods;