text: 
  #pragma once
  
  extern "C" {
  
  #include <ctype.h>
  #include "fmgr.h"
  
  }
  
  extern "C" {
  
  extern Datum pg_backend_stats_last_query(PG_FUNCTION_ARGS);
  extern Datum pg_compute_query_id(PG_FUNCTION_ARGS);
  
  }
  
  