511 lines
19 KiB
Go
511 lines
19 KiB
Go
// Copyright 2017-2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package postgres
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import (
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"context"
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"database/sql"
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"fmt"
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"sort"
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"github.com/lib/pq"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/roomserver/storage/tables"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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)
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const eventsSchema = `
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-- The events table holds metadata for each event, the actual JSON is stored
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-- separately to keep the size of the rows small.
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CREATE SEQUENCE IF NOT EXISTS roomserver_event_nid_seq;
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CREATE TABLE IF NOT EXISTS roomserver_events (
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-- Local numeric ID for the event.
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event_nid BIGINT PRIMARY KEY DEFAULT nextval('roomserver_event_nid_seq'),
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-- Local numeric ID for the room the event is in.
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-- This is never 0.
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room_nid BIGINT NOT NULL,
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-- Local numeric ID for the type of the event.
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-- This is never 0.
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event_type_nid BIGINT NOT NULL,
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-- Local numeric ID for the state_key of the event
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-- This is 0 if the event is not a state event.
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event_state_key_nid BIGINT NOT NULL,
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-- Whether the event has been written to the output log.
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sent_to_output BOOLEAN NOT NULL DEFAULT FALSE,
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-- Local numeric ID for the state at the event.
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-- This is 0 if we don't know the state at the event.
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-- If the state is not 0 then this event is part of the contiguous
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-- part of the event graph
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-- Since many different events can have the same state we store the
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-- state into a separate state table and refer to it by numeric ID.
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state_snapshot_nid BIGINT NOT NULL DEFAULT 0,
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-- Depth of the event in the event graph.
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depth BIGINT NOT NULL,
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-- The textual event id.
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-- Used to lookup the numeric ID when processing requests.
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-- Needed for state resolution.
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-- An event may only appear in this table once.
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event_id TEXT NOT NULL CONSTRAINT roomserver_event_id_unique UNIQUE,
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-- The sha256 reference hash for the event.
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-- Needed for setting reference hashes when sending new events.
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reference_sha256 BYTEA NOT NULL,
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-- A list of numeric IDs for events that can authenticate this event.
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auth_event_nids BIGINT[] NOT NULL,
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is_rejected BOOLEAN NOT NULL DEFAULT FALSE
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);
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`
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const insertEventSQL = "" +
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"INSERT INTO roomserver_events (room_nid, event_type_nid, event_state_key_nid, event_id, reference_sha256, auth_event_nids, depth, is_rejected)" +
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" VALUES ($1, $2, $3, $4, $5, $6, $7, $8)" +
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" ON CONFLICT ON CONSTRAINT roomserver_event_id_unique" +
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" DO NOTHING" +
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" RETURNING event_nid, state_snapshot_nid"
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const selectEventSQL = "" +
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"SELECT event_nid, state_snapshot_nid FROM roomserver_events WHERE event_id = $1"
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// Bulk lookup of events by string ID.
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// Sort by the numeric IDs for event type and state key.
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// This means we can use binary search to lookup entries by type and state key.
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const bulkSelectStateEventByIDSQL = "" +
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"SELECT event_type_nid, event_state_key_nid, event_nid FROM roomserver_events" +
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" WHERE event_id = ANY($1)" +
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" ORDER BY event_type_nid, event_state_key_nid ASC"
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// Bulk look up of events by event NID, optionally filtering by the event type
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// or event state key NIDs if provided. (The CARDINALITY check will return true
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// if the provided arrays are empty, ergo no filtering).
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const bulkSelectStateEventByNIDSQL = "" +
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"SELECT event_type_nid, event_state_key_nid, event_nid FROM roomserver_events" +
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" WHERE event_nid = ANY($1)" +
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" AND (CARDINALITY($2::bigint[]) = 0 OR event_type_nid = ANY($2))" +
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" AND (CARDINALITY($3::bigint[]) = 0 OR event_state_key_nid = ANY($3))" +
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" ORDER BY event_type_nid, event_state_key_nid ASC"
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const bulkSelectStateAtEventByIDSQL = "" +
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"SELECT event_type_nid, event_state_key_nid, event_nid, state_snapshot_nid, is_rejected FROM roomserver_events" +
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" WHERE event_id = ANY($1)"
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const updateEventStateSQL = "" +
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"UPDATE roomserver_events SET state_snapshot_nid = $2 WHERE event_nid = $1"
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const selectEventSentToOutputSQL = "" +
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"SELECT sent_to_output FROM roomserver_events WHERE event_nid = $1"
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const updateEventSentToOutputSQL = "" +
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"UPDATE roomserver_events SET sent_to_output = TRUE WHERE event_nid = $1"
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const selectEventIDSQL = "" +
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"SELECT event_id FROM roomserver_events WHERE event_nid = $1"
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const bulkSelectStateAtEventAndReferenceSQL = "" +
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"SELECT event_type_nid, event_state_key_nid, event_nid, state_snapshot_nid, event_id, reference_sha256" +
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" FROM roomserver_events WHERE event_nid = ANY($1)"
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const bulkSelectEventReferenceSQL = "" +
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"SELECT event_id, reference_sha256 FROM roomserver_events WHERE event_nid = ANY($1)"
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const bulkSelectEventIDSQL = "" +
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"SELECT event_nid, event_id FROM roomserver_events WHERE event_nid = ANY($1)"
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const bulkSelectEventNIDSQL = "" +
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"SELECT event_id, event_nid FROM roomserver_events WHERE event_id = ANY($1)"
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const selectMaxEventDepthSQL = "" +
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"SELECT COALESCE(MAX(depth) + 1, 0) FROM roomserver_events WHERE event_nid = ANY($1)"
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const selectRoomNIDsForEventNIDsSQL = "" +
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"SELECT event_nid, room_nid FROM roomserver_events WHERE event_nid = ANY($1)"
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type eventStatements struct {
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insertEventStmt *sql.Stmt
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selectEventStmt *sql.Stmt
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bulkSelectStateEventByIDStmt *sql.Stmt
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bulkSelectStateEventByNIDStmt *sql.Stmt
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bulkSelectStateAtEventByIDStmt *sql.Stmt
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updateEventStateStmt *sql.Stmt
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selectEventSentToOutputStmt *sql.Stmt
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updateEventSentToOutputStmt *sql.Stmt
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selectEventIDStmt *sql.Stmt
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bulkSelectStateAtEventAndReferenceStmt *sql.Stmt
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bulkSelectEventReferenceStmt *sql.Stmt
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bulkSelectEventIDStmt *sql.Stmt
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bulkSelectEventNIDStmt *sql.Stmt
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selectMaxEventDepthStmt *sql.Stmt
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selectRoomNIDsForEventNIDsStmt *sql.Stmt
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}
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func createEventsTable(db *sql.DB) error {
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_, err := db.Exec(eventsSchema)
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return err
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}
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func prepareEventsTable(db *sql.DB) (tables.Events, error) {
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s := &eventStatements{}
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return s, sqlutil.StatementList{
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{&s.insertEventStmt, insertEventSQL},
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{&s.selectEventStmt, selectEventSQL},
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{&s.bulkSelectStateEventByIDStmt, bulkSelectStateEventByIDSQL},
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{&s.bulkSelectStateEventByNIDStmt, bulkSelectStateEventByNIDSQL},
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{&s.bulkSelectStateAtEventByIDStmt, bulkSelectStateAtEventByIDSQL},
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{&s.updateEventStateStmt, updateEventStateSQL},
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{&s.updateEventSentToOutputStmt, updateEventSentToOutputSQL},
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{&s.selectEventSentToOutputStmt, selectEventSentToOutputSQL},
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{&s.selectEventIDStmt, selectEventIDSQL},
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{&s.bulkSelectStateAtEventAndReferenceStmt, bulkSelectStateAtEventAndReferenceSQL},
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{&s.bulkSelectEventReferenceStmt, bulkSelectEventReferenceSQL},
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{&s.bulkSelectEventIDStmt, bulkSelectEventIDSQL},
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{&s.bulkSelectEventNIDStmt, bulkSelectEventNIDSQL},
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{&s.selectMaxEventDepthStmt, selectMaxEventDepthSQL},
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{&s.selectRoomNIDsForEventNIDsStmt, selectRoomNIDsForEventNIDsSQL},
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}.Prepare(db)
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}
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func (s *eventStatements) InsertEvent(
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ctx context.Context,
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txn *sql.Tx,
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roomNID types.RoomNID,
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eventTypeNID types.EventTypeNID,
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eventStateKeyNID types.EventStateKeyNID,
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eventID string,
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referenceSHA256 []byte,
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authEventNIDs []types.EventNID,
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depth int64,
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isRejected bool,
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) (types.EventNID, types.StateSnapshotNID, error) {
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var eventNID int64
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var stateNID int64
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err := s.insertEventStmt.QueryRowContext(
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ctx, int64(roomNID), int64(eventTypeNID), int64(eventStateKeyNID),
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eventID, referenceSHA256, eventNIDsAsArray(authEventNIDs), depth,
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isRejected,
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).Scan(&eventNID, &stateNID)
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return types.EventNID(eventNID), types.StateSnapshotNID(stateNID), err
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}
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func (s *eventStatements) SelectEvent(
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ctx context.Context, txn *sql.Tx, eventID string,
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) (types.EventNID, types.StateSnapshotNID, error) {
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var eventNID int64
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var stateNID int64
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err := s.selectEventStmt.QueryRowContext(ctx, eventID).Scan(&eventNID, &stateNID)
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return types.EventNID(eventNID), types.StateSnapshotNID(stateNID), err
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}
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// bulkSelectStateEventByID lookups a list of state events by event ID.
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// If any of the requested events are missing from the database it returns a types.MissingEventError
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func (s *eventStatements) BulkSelectStateEventByID(
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ctx context.Context, eventIDs []string,
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) ([]types.StateEntry, error) {
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rows, err := s.bulkSelectStateEventByIDStmt.QueryContext(ctx, pq.StringArray(eventIDs))
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectStateEventByID: rows.close() failed")
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// We know that we will only get as many results as event IDs
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// because of the unique constraint on event IDs.
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// So we can allocate an array of the correct size now.
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// We might get fewer results than IDs so we adjust the length of the slice before returning it.
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results := make([]types.StateEntry, len(eventIDs))
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i := 0
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for ; rows.Next(); i++ {
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result := &results[i]
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if err = rows.Scan(
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&result.EventTypeNID,
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&result.EventStateKeyNID,
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&result.EventNID,
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); err != nil {
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return nil, err
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}
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}
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if err = rows.Err(); err != nil {
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return nil, err
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}
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if i != len(eventIDs) {
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// If there are fewer rows returned than IDs then we were asked to lookup event IDs we don't have.
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// We don't know which ones were missing because we don't return the string IDs in the query.
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// However it should be possible debug this by replaying queries or entries from the input kafka logs.
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// If this turns out to be impossible and we do need the debug information here, it would be better
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// to do it as a separate query rather than slowing down/complicating the internal case.
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return nil, types.MissingEventError(
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fmt.Sprintf("storage: state event IDs missing from the database (%d != %d)", i, len(eventIDs)),
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)
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}
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return results, nil
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}
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// bulkSelectStateEventByNID lookups a list of state events by event NID.
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// If any of the requested events are missing from the database it returns a types.MissingEventError
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func (s *eventStatements) BulkSelectStateEventByNID(
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ctx context.Context, eventNIDs []types.EventNID,
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stateKeyTuples []types.StateKeyTuple,
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) ([]types.StateEntry, error) {
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tuples := stateKeyTupleSorter(stateKeyTuples)
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sort.Sort(tuples)
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eventTypeNIDArray, eventStateKeyNIDArray := tuples.typesAndStateKeysAsArrays()
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rows, err := s.bulkSelectStateEventByNIDStmt.QueryContext(ctx, eventNIDsAsArray(eventNIDs), eventTypeNIDArray, eventStateKeyNIDArray)
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectStateEventByID: rows.close() failed")
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// We know that we will only get as many results as event IDs
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// because of the unique constraint on event IDs.
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// So we can allocate an array of the correct size now.
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// We might get fewer results than IDs so we adjust the length of the slice before returning it.
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results := make([]types.StateEntry, len(eventNIDs))
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i := 0
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for ; rows.Next(); i++ {
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result := &results[i]
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if err = rows.Scan(
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&result.EventTypeNID,
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&result.EventStateKeyNID,
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&result.EventNID,
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); err != nil {
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return nil, err
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}
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}
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if err = rows.Err(); err != nil {
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return nil, err
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}
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return results[:i], nil
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}
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// bulkSelectStateAtEventByID lookups the state at a list of events by event ID.
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// If any of the requested events are missing from the database it returns a types.MissingEventError.
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// If we do not have the state for any of the requested events it returns a types.MissingEventError.
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func (s *eventStatements) BulkSelectStateAtEventByID(
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ctx context.Context, eventIDs []string,
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) ([]types.StateAtEvent, error) {
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rows, err := s.bulkSelectStateAtEventByIDStmt.QueryContext(ctx, pq.StringArray(eventIDs))
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectStateAtEventByID: rows.close() failed")
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results := make([]types.StateAtEvent, len(eventIDs))
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i := 0
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for ; rows.Next(); i++ {
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result := &results[i]
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if err = rows.Scan(
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&result.EventTypeNID,
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&result.EventStateKeyNID,
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&result.EventNID,
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&result.BeforeStateSnapshotNID,
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&result.IsRejected,
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); err != nil {
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return nil, err
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}
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if result.BeforeStateSnapshotNID == 0 {
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return nil, types.MissingEventError(
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fmt.Sprintf("storage: missing state for event NID %d", result.EventNID),
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)
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}
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}
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if err = rows.Err(); err != nil {
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return nil, err
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}
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if i != len(eventIDs) {
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return nil, types.MissingEventError(
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fmt.Sprintf("storage: event IDs missing from the database (%d != %d)", i, len(eventIDs)),
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)
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}
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return results, nil
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}
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func (s *eventStatements) UpdateEventState(
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ctx context.Context, txn *sql.Tx, eventNID types.EventNID, stateNID types.StateSnapshotNID,
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) error {
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stmt := sqlutil.TxStmt(txn, s.updateEventStateStmt)
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_, err := stmt.ExecContext(ctx, int64(eventNID), int64(stateNID))
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return err
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}
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func (s *eventStatements) SelectEventSentToOutput(
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ctx context.Context, txn *sql.Tx, eventNID types.EventNID,
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) (sentToOutput bool, err error) {
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stmt := sqlutil.TxStmt(txn, s.selectEventSentToOutputStmt)
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err = stmt.QueryRowContext(ctx, int64(eventNID)).Scan(&sentToOutput)
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return
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}
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func (s *eventStatements) UpdateEventSentToOutput(ctx context.Context, txn *sql.Tx, eventNID types.EventNID) error {
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stmt := sqlutil.TxStmt(txn, s.updateEventSentToOutputStmt)
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_, err := stmt.ExecContext(ctx, int64(eventNID))
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return err
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}
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func (s *eventStatements) SelectEventID(
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ctx context.Context, txn *sql.Tx, eventNID types.EventNID,
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) (eventID string, err error) {
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stmt := sqlutil.TxStmt(txn, s.selectEventIDStmt)
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err = stmt.QueryRowContext(ctx, int64(eventNID)).Scan(&eventID)
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return
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}
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func (s *eventStatements) BulkSelectStateAtEventAndReference(
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ctx context.Context, txn *sql.Tx, eventNIDs []types.EventNID,
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) ([]types.StateAtEventAndReference, error) {
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stmt := sqlutil.TxStmt(txn, s.bulkSelectStateAtEventAndReferenceStmt)
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rows, err := stmt.QueryContext(ctx, eventNIDsAsArray(eventNIDs))
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectStateAtEventAndReference: rows.close() failed")
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results := make([]types.StateAtEventAndReference, len(eventNIDs))
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i := 0
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for ; rows.Next(); i++ {
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var (
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eventTypeNID int64
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eventStateKeyNID int64
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eventNID int64
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stateSnapshotNID int64
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eventID string
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eventSHA256 []byte
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)
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if err = rows.Scan(
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&eventTypeNID, &eventStateKeyNID, &eventNID, &stateSnapshotNID, &eventID, &eventSHA256,
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); err != nil {
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return nil, err
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}
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result := &results[i]
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result.EventTypeNID = types.EventTypeNID(eventTypeNID)
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result.EventStateKeyNID = types.EventStateKeyNID(eventStateKeyNID)
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result.EventNID = types.EventNID(eventNID)
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result.BeforeStateSnapshotNID = types.StateSnapshotNID(stateSnapshotNID)
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result.EventID = eventID
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result.EventSHA256 = eventSHA256
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}
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if err = rows.Err(); err != nil {
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return nil, err
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}
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if i != len(eventNIDs) {
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return nil, fmt.Errorf("storage: event NIDs missing from the database (%d != %d)", i, len(eventNIDs))
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}
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return results, nil
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}
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func (s *eventStatements) BulkSelectEventReference(
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ctx context.Context, txn *sql.Tx, eventNIDs []types.EventNID,
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) ([]gomatrixserverlib.EventReference, error) {
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rows, err := s.bulkSelectEventReferenceStmt.QueryContext(ctx, eventNIDsAsArray(eventNIDs))
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectEventReference: rows.close() failed")
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results := make([]gomatrixserverlib.EventReference, len(eventNIDs))
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i := 0
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for ; rows.Next(); i++ {
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result := &results[i]
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if err = rows.Scan(&result.EventID, &result.EventSHA256); err != nil {
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return nil, err
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}
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}
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if err = rows.Err(); err != nil {
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return nil, err
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}
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if i != len(eventNIDs) {
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return nil, fmt.Errorf("storage: event NIDs missing from the database (%d != %d)", i, len(eventNIDs))
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}
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return results, nil
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}
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// bulkSelectEventID returns a map from numeric event ID to string event ID.
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func (s *eventStatements) BulkSelectEventID(ctx context.Context, eventNIDs []types.EventNID) (map[types.EventNID]string, error) {
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rows, err := s.bulkSelectEventIDStmt.QueryContext(ctx, eventNIDsAsArray(eventNIDs))
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if err != nil {
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return nil, err
|
|
}
|
|
defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectEventID: rows.close() failed")
|
|
results := make(map[types.EventNID]string, len(eventNIDs))
|
|
i := 0
|
|
for ; rows.Next(); i++ {
|
|
var eventNID int64
|
|
var eventID string
|
|
if err = rows.Scan(&eventNID, &eventID); err != nil {
|
|
return nil, err
|
|
}
|
|
results[types.EventNID(eventNID)] = eventID
|
|
}
|
|
if err = rows.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
if i != len(eventNIDs) {
|
|
return nil, fmt.Errorf("storage: event NIDs missing from the database (%d != %d)", i, len(eventNIDs))
|
|
}
|
|
return results, nil
|
|
}
|
|
|
|
// bulkSelectEventNIDs returns a map from string event ID to numeric event ID.
|
|
// If an event ID is not in the database then it is omitted from the map.
|
|
func (s *eventStatements) BulkSelectEventNID(ctx context.Context, eventIDs []string) (map[string]types.EventNID, error) {
|
|
rows, err := s.bulkSelectEventNIDStmt.QueryContext(ctx, pq.StringArray(eventIDs))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectEventNID: rows.close() failed")
|
|
results := make(map[string]types.EventNID, len(eventIDs))
|
|
for rows.Next() {
|
|
var eventID string
|
|
var eventNID int64
|
|
if err = rows.Scan(&eventID, &eventNID); err != nil {
|
|
return nil, err
|
|
}
|
|
results[eventID] = types.EventNID(eventNID)
|
|
}
|
|
return results, rows.Err()
|
|
}
|
|
|
|
func (s *eventStatements) SelectMaxEventDepth(ctx context.Context, txn *sql.Tx, eventNIDs []types.EventNID) (int64, error) {
|
|
var result int64
|
|
stmt := s.selectMaxEventDepthStmt
|
|
err := stmt.QueryRowContext(ctx, eventNIDsAsArray(eventNIDs)).Scan(&result)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func (s *eventStatements) SelectRoomNIDsForEventNIDs(
|
|
ctx context.Context, eventNIDs []types.EventNID,
|
|
) (map[types.EventNID]types.RoomNID, error) {
|
|
rows, err := s.selectRoomNIDsForEventNIDsStmt.QueryContext(ctx, eventNIDsAsArray(eventNIDs))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer internal.CloseAndLogIfError(ctx, rows, "selectRoomNIDsForEventNIDsStmt: rows.close() failed")
|
|
result := make(map[types.EventNID]types.RoomNID)
|
|
for rows.Next() {
|
|
var eventNID types.EventNID
|
|
var roomNID types.RoomNID
|
|
if err = rows.Scan(&eventNID, &roomNID); err != nil {
|
|
return nil, err
|
|
}
|
|
result[eventNID] = roomNID
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func eventNIDsAsArray(eventNIDs []types.EventNID) pq.Int64Array {
|
|
nids := make([]int64, len(eventNIDs))
|
|
for i := range eventNIDs {
|
|
nids[i] = int64(eventNIDs[i])
|
|
}
|
|
return nids
|
|
}
|