ircd:Ⓜ️ Use event::keys::selection bitset in event::fetch::opts rather than event::keys.

include/ircd/m/event/fetch.h

@@ -98,23 +98,18 @@ namespace ircd::m
 struct ircd::m::event::fetch::opts
 {
 	/// Event property selector
-	event::keys keys;
+	event::keys::selection keys;
 
 	/// Database get options passthru
 	db::gopts gopts;
 
-	/// Whether to allow querying the event_json to populate the event. A value
-	/// of true only allows this type of query to be made; a value of false
-	/// prevents this query from ever being made.
-	bool query_json {true};
-
 	/// Whether to force an attempt at populating the event from event_json
 	/// first, bypassing any decision-making. This is useful if a key selection
 	/// is used which would trigger a row query but the developer wants the
 	/// json query anyway.
 	bool query_json_force {false};
 
-	opts(const event::keys &, const db::gopts & = {});
-	opts(const db::gopts &, const event::keys & = {});
+	opts(const event::keys::selection &, const db::gopts & = {});
+	opts(const db::gopts &, const event::keys::selection & = {});
 	opts() = default;
 };

ircd/m.cc

@@ -2576,13 +2576,9 @@ ircd::m::user::rooms::for_each(const string_view &membership,
 const
 {
 	// Setup the list of event fields to fetch for the closure
-	static const event::keys keys
+	static const event::keys::include keys
 	{
-		event::keys::include
-		{
-			"state_key",
-			"content",
-		}
+		"state_key", "content",
     };
 
 	const m::event::fetch::opts fopts

ircd/m_event.cc

@@ -253,13 +253,13 @@ bool
 ircd::m::cached(const event::idx &event_idx,
                 const event::fetch::opts &opts)
 {
-	const auto &select(opts.keys);
-	auto &columns(dbs::event_column);
 	const byte_view<string_view> &key
 	{
 		event_idx
 	};
 
+	auto &columns(dbs::event_column);
+	const event::keys &select(opts.keys);
 	return std::all_of(begin(select), end(select), [&opts, &key, &columns]
 	(const string_view &colname)
 	{
@@ -1228,11 +1228,8 @@ void
 ircd::m::prefetch(const event::idx &event_idx,
                   const event::fetch::opts &opts)
 {
-	const vector_view<const string_view> cols
-	{
-		opts.keys
-	};
-
+	const event::keys keys{opts.keys};
+	const vector_view<const string_view> cols{keys};
 	for(const auto &col : cols)
 		if(col)
 			prefetch(event_idx, col);
@@ -1624,7 +1621,7 @@ ircd::m::event::fetch::fetch(const event::idx &event_idx,
 	event_idx && !_json.valid(key(&event_idx))?
 		key(&event_idx):
 		string_view{},
-	opts.keys,
+	event::keys{opts.keys},
 	cell,
 	opts.gopts
 }
@@ -1650,7 +1647,7 @@ ircd::m::event::fetch::fetch(const opts &opts)
 {
 	*dbs::events,
 	string_view{},
-	opts.keys,
+	event::keys{opts.keys},
 	cell,
 	opts.gopts
 }
@@ -1704,21 +1701,18 @@ ircd::m::event::fetch::assign_from_row(const opts &opts,
 bool
 ircd::m::event::fetch::should_seek_json(const opts &opts)
 {
-	 // User never wants to make the event_json query
-	if(!opts.query_json)
-		return false;
-
-	// User always wants to make the event_json query
+	// User always wants to make the event_json query regardless
+	// of their keys selection.
 	if(opts.query_json_force)
 		return true;
 
-	// User is making specific column queries
-	if(opts.keys.count() < event::size())
-		return false;
-
-	// User is querying all columns
-	if(opts.keys.count() == event::size())
-		return true;
+	// If and only if selected keys have direct columns we can return
+	// false to seek direct columns. If any other keys are selected we
+	/// must perform the event_json query instead.
+	for(size_t i(0); i < opts.keys.size(); ++i)
+		if(opts.keys.test(i))
+			if(!dbs::event_column.at(i))
+				return true;
 
 	return false;
 }
@@ -1735,7 +1729,7 @@ ircd::m::event::fetch::key(const event::idx *const &event_idx)
 //
 
 ircd::m::event::fetch::opts::opts(const db::gopts &gopts,
-                                  const event::keys &keys)
+                                  const event::keys::selection &keys)
 :opts
 {
 	keys, gopts
@@ -1743,7 +1737,7 @@ ircd::m::event::fetch::opts::opts(const db::gopts &gopts,
 {
 }
 
-ircd::m::event::fetch::opts::opts(const event::keys &keys,
+ircd::m::event::fetch::opts::opts(const event::keys::selection &keys,
                                   const db::gopts &gopts)
 :keys{keys}
 ,gopts{gopts}

ircd/m_room.cc

@@ -371,7 +371,7 @@ ircd::m::room::membership(const mutable_buffer &out,
                           const m::id::user &user_id)
 const
 {
-	static const event::keys membership_keys
+	static const event::keys::selection membership_keys
 	{
 		event::keys::include{"membership"}
 	};
@@ -405,7 +405,7 @@ const
 	// is a rare case so both queries are optimized to only seek for their key.
 	if(exists && !ret)
 	{
-		static const event::keys content_membership_keys
+		static const event::keys::selection content_membership_keys
 		{
 			event::keys::include{"content"}
 		};
@@ -1640,14 +1640,11 @@ const
 	}
 
 	// The list of event fields to fetch for the closure
-	static const event::keys keys
+	static const event::keys::include keys
 	{
-		event::keys::include
-		{
-			"event_id",    // Added for any upstack usage (but may be unnecessary).
-			"membership",  // Required for membership test.
-			"content",     // Required because synapse events randomly have no event.membership
-		}
+		"event_id",    // Added for any upstack usage (but may be unnecessary).
+		"membership",  // Required for membership test.
+		"content",     // Required because synapse events randomly have no event.membership
 	};
 
 	const m::event::fetch::opts fopts
@@ -1726,15 +1723,12 @@ ircd::m::room::members::for_each(const string_view &membership,
 const
 {
 	// Setup the list of event fields to fetch for the closure
-	static const event::keys keys
+	static const event::keys::include keys
 	{
-		event::keys::include
-		{
-			"event_id",
-			"membership",
-			"state_key",
-			"content",    // Required because synapse events randomly have no event.membership
-		}
+		"event_id",
+		"membership",
+		"state_key",
+		"content",    // Required because synapse events randomly have no event.membership
 	};
 
 	// In this case the fetch opts isn't static so it can maintain the
@@ -2460,12 +2454,9 @@ bool
 ircd::m::room::power::view(const std::function<void (const json::object &)> &closure)
 const
 {
-	static const event::keys keys
+	static const event::keys::include keys
 	{
-		event::keys::include
-		{
-			"content",
-		}
+		"content",
 	};
 
 	const m::event::fetch::opts fopts

modules/m_rooms.cc

@@ -184,12 +184,9 @@ void
 ircd::m::rooms::local_summary_chunk(const m::room &room,
                                     json::stack::object &obj)
 {
-	static const event::keys keys
+	static const event::keys::include keys
 	{
-		event::keys::include
-		{
-			"content",
-		}
+		"content",
 	};
 
 	const m::event::fetch::opts fopts