diff --git a/include/ircd/db/compactor.h b/include/ircd/db/compactor.h
index 9c9445a70..85fc5bd6a 100644
--- a/include/ircd/db/compactor.h
+++ b/include/ircd/db/compactor.h
@@ -25,12 +25,21 @@ namespace ircd::db
 ///
 struct ircd::db::compactor
 {
-	using prototype = db::op (const int &level,
-	                          const string_view &key,
-	                          const string_view &val,
-	                          std::string *const replace,
-	                          std::string *const skip_until);
+	struct args;
+	using proto = db::op (const args &);
+	using callback = std::function<proto>;
 
-	std::function<prototype> value;
-	std::function<prototype> merge;
+	callback value;
+	callback merge;
+};
+
+struct ircd::db::compactor::args
+{
+	const int &level;
+
+	const string_view key;
+	const string_view val;
+
+	std::string *const &replace;
+	std::string *const &skip_until;
 };
diff --git a/ircd/db.cc b/ircd/db.cc
index 2a3f0b003..006c5aaba 100644
--- a/ircd/db.cc
+++ b/ircd/db.cc
@@ -2436,28 +2436,26 @@ const
 	};
 	#endif
 
-	db::op ret
+	const db::compactor::callback &callback
 	{
-		db::op::GET
+		type == ValueType::kValue && user.value?
+			user.value:
+
+		type == ValueType::kMergeOperand && user.merge?
+			user.merge:
+
+		compactor::callback{}
 	};
 
-	switch(type)
+	if(!callback)
+		return Decision::kKeep;
+
+	const compactor::args args
 	{
-		case ValueType::kValue:
-			if(user.value)
-				ret = user.value(level, slice(key), slice(oldval), newval, skip);
-			break;
+		level, slice(key), slice(oldval), newval, skip
+	};
 
-		case ValueType::kMergeOperand:
-			if(user.merge)
-				ret = user.merge(level, slice(key), slice(oldval), newval, skip);
-			break;
-
-		case ValueType::kBlobIndex:
-			break;
-	}
-
-	switch(ret)
+	switch(callback(args))
 	{
 		default:
 		case db::op::GET:            return Decision::kKeep;