DatumGetPeriod DatumGetPeriodSet DatumGetTimestampSet PeriodGetDatum PeriodSetGetDatum PG_GETARG_PERIOD PG_GETARG_PERIODSET PG_GETARG_TIMESTAMPSET PG_RETURN_PERIOD PG_RETURN_PERIODSET PG_RETURN_TIMESTAMPSET TimestampSetGetDatum

PG_RETURN_PERIOD #define PG_RETURN_PERIOD (   X )    PG_RETURN_POINTER(X)