 <a class="xref" href="runtime-config-statistics.html#GUC-COMPUTE-QUERY-ID">compute_query_id</a> is enabled.  If you use an external
    module instead to compute <code class="structfield">queryid</code>, you
    should refer to its documentation for details.
   </p></div><p>
   When a constant's value has been ignored for purposes of matching the query
   to other queries, the constant is replaced by a parameter symbol, such
   as <code class="literal">$1</code>, in the <code class="structname">pg_stat_sta