Function build_aggregate_deserialfn_expr

src/backend/parser/parse_agg.c:2163–2181

* Like build_aggregate_transfn_expr, but creates an expression tree for the * deserialization function of an aggregate. */

 * deserialization function of an aggregate.
 */
void
build_aggregate_deserialfn_expr(Oid deserialfn_oid,
								Expr **deserialfnexpr)
{
	List	   *args;
	FuncExpr   *fexpr;

	/* deserialfn always takes BYTEA, INTERNAL and returns INTERNAL */
	args = list_make2(make_agg_arg(BYTEAOID, InvalidOid),
					  make_agg_arg(INTERNALOID, InvalidOid));

	fexpr = makeFuncExpr(deserialfn_oid,
						 INTERNALOID,
						 args,
						 InvalidOid,
						 InvalidOid,
						 COERCE_EXPLICIT_CALL);
	*deserialfnexpr = (Expr *) fexpr;
}

/*
 * Like build_aggregate_transfn_expr, but creates an expression tree for the