data =PG_GETARG_BYTEA_P(0); } ac = (AdaptiveCounter)VARDATA(data);/* get the new item */text * item = PG_GETARG_TEXT_P(1);/* in-place update works only if executed as aggregate */as_add_element(ac, VARDATA(item), VARSIZE(item) - VARHDRSZ);/* return the updated bytea *...