Even when parallel query plan is generated for a particular query, there
are several circumstances under which it will be impossible to execute
that plan in parallel at execution time. If this occurs, the leader
- will execute the portion of the plan between below the <literal>Gather</>
+ will execute the portion of the plan below the <literal>Gather</>
node entirely by itself, almost as if the <literal>Gather</> node were
not present. This will happen if any of the following conditions are met:
</para>