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   1 #include "postgres.h"
   2 #include "fmgr.h"
   3
   4 PG_MODULE_MAGIC;
   5
   6 PG_FUNCTION_INFO_V1(my_inc);
   7
   8 Datum
   9 my_inc(PG_FUNCTION_ARGS)
  10 {
  11
  12     PG_RETURN_INT32(2);
  13 }