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831
<entry><literal><function>pg_stat_get_backend_client_port</function>(<type>integer</type>)</literal></entry>
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832
<entry><type>integer</type></entry>
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835
server process. -1 if the connection is over a Unix domain
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836
socket. Null if the current user is not a superuser nor the
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837
same user as that of the session being queried