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Tweaks around /messages (#3149)

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Try to mitigate some issues with `/messages`
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Till 2023-07-13 14:18:37 +02:00 • committed by GitHub
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11 changed files with 182 additions and 88 deletions
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6
syncapi/storage/tables/interface.go
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@ -89,11 +89,11 @@ type Topology interface {
// InsertEventInTopology inserts the given event in the room's topology, based on the event's depth.
// `pos` is the stream position of this event in the events table, and is used to order events which have the same depth.
InsertEventInTopology(ctx context.Context, txn *sql.Tx, event *rstypes.HeaderedEvent, pos types.StreamPosition) (topoPos types.StreamPosition, err error)
// SelectEventIDsInRange selects the IDs of events whose depths are within a given range in a given room's topological order.
// Events with `minDepth` are *exclusive*, as is the event which has exactly `minDepth`,`maxStreamPos`.
// SelectEventIDsInRange selects the IDs and the topological position of events whose depths are within a given range in a given room's topological order.
// Events with `minDepth` are *exclusive*, as is the event which has exactly `minDepth`,`maxStreamPos`. Returns the eventIDs and start/end topological tokens.
// `maxStreamPos` is only used when events have the same depth as `maxDepth`, which results in events less than `maxStreamPos` being returned.
// Returns an empty slice if no events match the given range.
SelectEventIDsInRange(ctx context.Context, txn *sql.Tx, roomID string, minDepth, maxDepth, maxStreamPos types.StreamPosition, limit int, chronologicalOrder bool) (eventIDs []string, err error)
SelectEventIDsInRange(ctx context.Context, txn *sql.Tx, roomID string, minDepth, maxDepth, maxStreamPos types.StreamPosition, limit int, chronologicalOrder bool) (eventIDs []string, start, end types.TopologyToken, err error)
// SelectPositionInTopology returns the depth and stream position of a given event in the topology of the room it belongs to.
SelectPositionInTopology(ctx context.Context, txn *sql.Tx, eventID string) (depth, spos types.StreamPosition, err error)
// SelectStreamToTopologicalPosition converts a stream position to a topological position by finding the nearest topological position in the room.