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Code Issues Releases Wiki Activity

Fix fragility of selectEventsWithEventIDsSQL queries (#2757)

Browse source 
This fixes a temporary workaround with the `selectEventsWithEventIDsSQL`
queries where fields need to be artificially added to the queries so the
row results match the format of the `syncapi_output_room_events` table.
I made similar functions that accept row results from the
`syncapi_current_room_state` table and convert them into StreamEvents
without the fields that are specific to output room events.

There is also a unit test in the first commit to ensure the resulting
behavior doesn't change from the modified queries and functions.

Fixes #601.

### Pull Request Checklist

<!-- Please read docs/CONTRIBUTING.md before submitting your pull
request -->

* [x] I have added tests for PR _or_ I have justified why this PR
doesn't need tests.
* [x] Pull request includes a [sign
off](https://github.com/matrix-org/dendrite/blob/main/docs/CONTRIBUTING.md#sign-off)

Signed-off-by: `Ashley Nelson <fant@shley.email>`

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
This commit is contained in:
Ashley Nelson 2022-10-03 05:57:21 -05:00 committed by GitHub
parent b7f4bab358
commit c1e16fd41e
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 150 additions and 14 deletions
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38
syncapi/storage/postgres/current_room_state_table.go
View file

@ -104,12 +104,7 @@ const selectStateEventSQL = "" +
"SELECT headered_event_json FROM syncapi_current_room_state WHERE room_id = $1 AND type = $2 AND state_key = $3"
const selectEventsWithEventIDsSQL = "" +
// TODO: The session_id and transaction_id blanks are here because
// the rowsToStreamEvents expects there to be exactly seven columns. We need to
// figure out if these really need to be in the DB, and if so, we need a
// better permanent fix for this. - neilalexander, 2 Jan 2020
"SELECT event_id, added_at, headered_event_json, 0 AS session_id, false AS exclude_from_sync, '' AS transaction_id, history_visibility" +
" FROM syncapi_current_room_state WHERE event_id = ANY($1)"
"SELECT event_id, added_at, headered_event_json, history_visibility FROM syncapi_current_room_state WHERE event_id = ANY($1)"
const selectSharedUsersSQL = "" +
"SELECT state_key FROM syncapi_current_room_state WHERE room_id = ANY(" +
@ -365,7 +360,36 @@ func (s *currentRoomStateStatements) SelectEventsWithEventIDs(
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectEventsWithEventIDs: rows.close() failed")
return rowsToStreamEvents(rows)
return currentRoomStateRowsToStreamEvents(rows)
}
func currentRoomStateRowsToStreamEvents(rows *sql.Rows) ([]types.StreamEvent, error) {
var events []types.StreamEvent
for rows.Next() {
var (
eventID string
streamPos types.StreamPosition
eventBytes []byte
historyVisibility gomatrixserverlib.HistoryVisibility
)
if err := rows.Scan(&eventID, &streamPos, &eventBytes, &historyVisibility); err != nil {
return nil, err
}
// TODO: Handle redacted events
var ev gomatrixserverlib.HeaderedEvent
if err := ev.UnmarshalJSONWithEventID(eventBytes, eventID); err != nil {
return nil, err
}
ev.Visibility = historyVisibility
events = append(events, types.StreamEvent{
HeaderedEvent: &ev,
StreamPosition: streamPos,
})
}
return events, nil
}
func rowsToEvents(rows *sql.Rows) ([]*gomatrixserverlib.HeaderedEvent, error) {

38
syncapi/storage/sqlite3/current_room_state_table.go
View file

@ -88,12 +88,7 @@ const selectStateEventSQL = "" +
"SELECT headered_event_json FROM syncapi_current_room_state WHERE room_id = $1 AND type = $2 AND state_key = $3"
const selectEventsWithEventIDsSQL = "" +
// TODO: The session_id and transaction_id blanks are here because
// the rowsToStreamEvents expects there to be exactly seven columns. We need to
// figure out if these really need to be in the DB, and if so, we need a
// better permanent fix for this. - neilalexander, 2 Jan 2020
"SELECT event_id, added_at, headered_event_json, 0 AS session_id, false AS exclude_from_sync, '' AS transaction_id, history_visibility" +
" FROM syncapi_current_room_state WHERE event_id IN ($1)"
"SELECT event_id, added_at, headered_event_json, history_visibility FROM syncapi_current_room_state WHERE event_id IN ($1)"
const selectSharedUsersSQL = "" +
"SELECT state_key FROM syncapi_current_room_state WHERE room_id IN(" +
@ -378,7 +373,7 @@ func (s *currentRoomStateStatements) SelectEventsWithEventIDs(
return nil, err
}
start = start + n
events, err := rowsToStreamEvents(rows)
events, err := currentRoomStateRowsToStreamEvents(rows)
internal.CloseAndLogIfError(ctx, rows, "selectEventsWithEventIDs: rows.close() failed")
if err != nil {
return nil, err
@ -388,6 +383,35 @@ func (s *currentRoomStateStatements) SelectEventsWithEventIDs(
return res, nil
}
func currentRoomStateRowsToStreamEvents(rows *sql.Rows) ([]types.StreamEvent, error) {
var events []types.StreamEvent
for rows.Next() {
var (
eventID string
streamPos types.StreamPosition
eventBytes []byte
historyVisibility gomatrixserverlib.HistoryVisibility
)
if err := rows.Scan(&eventID, &streamPos, &eventBytes, &historyVisibility); err != nil {
return nil, err
}
// TODO: Handle redacted events
var ev gomatrixserverlib.HeaderedEvent
if err := ev.UnmarshalJSONWithEventID(eventBytes, eventID); err != nil {
return nil, err
}
ev.Visibility = historyVisibility
events = append(events, types.StreamEvent{
HeaderedEvent: &ev,
StreamPosition: streamPos,
})
}
return events, nil
}
func rowsToEvents(rows *sql.Rows) ([]*gomatrixserverlib.HeaderedEvent, error) {
result := []*gomatrixserverlib.HeaderedEvent{}
for rows.Next() {

88
syncapi/storage/tables/current_room_state_test.go Normal file
View file

@ -0,0 +1,88 @@
package tables_test
import (
"context"
"database/sql"
"fmt"
"testing"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/dendrite/syncapi/storage/postgres"
"github.com/matrix-org/dendrite/syncapi/storage/sqlite3"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/dendrite/test"
)
func newCurrentRoomStateTable(t *testing.T, dbType test.DBType) (tables.CurrentRoomState, *sql.DB, func()) {
t.Helper()
connStr, close := test.PrepareDBConnectionString(t, dbType)
db, err := sqlutil.Open(&config.DatabaseOptions{
ConnectionString: config.DataSource(connStr),
}, sqlutil.NewExclusiveWriter())
if err != nil {
t.Fatalf("failed to open db: %s", err)
}
var tab tables.CurrentRoomState
switch dbType {
case test.DBTypePostgres:
tab, err = postgres.NewPostgresCurrentRoomStateTable(db)
case test.DBTypeSQLite:
var stream sqlite3.StreamIDStatements
if err = stream.Prepare(db); err != nil {
t.Fatalf("failed to prepare stream stmts: %s", err)
}
tab, err = sqlite3.NewSqliteCurrentRoomStateTable(db, &stream)
}
if err != nil {
t.Fatalf("failed to make new table: %s", err)
}
return tab, db, close
}
func TestCurrentRoomStateTable(t *testing.T) {
ctx := context.Background()
alice := test.NewUser(t)
room := test.NewRoom(t, alice)
test.WithAllDatabases(t, func(t *testing.T, dbType test.DBType) {
tab, db, close := newCurrentRoomStateTable(t, dbType)
defer close()
events := room.CurrentState()
err := sqlutil.WithTransaction(db, func(txn *sql.Tx) error {
for i, ev := range events {
err := tab.UpsertRoomState(ctx, txn, ev, nil, types.StreamPosition(i))
if err != nil {
return fmt.Errorf("failed to UpsertRoomState: %w", err)
}
}
wantEventIDs := []string{
events[0].EventID(), events[1].EventID(), events[2].EventID(), events[3].EventID(),
}
gotEvents, err := tab.SelectEventsWithEventIDs(ctx, txn, wantEventIDs)
if err != nil {
return fmt.Errorf("failed to SelectEventsWithEventIDs: %w", err)
}
if len(gotEvents) != len(wantEventIDs) {
return fmt.Errorf("SelectEventsWithEventIDs\ngot %d, want %d results", len(gotEvents), len(wantEventIDs))
}
gotEventIDs := make(map[string]struct{}, len(gotEvents))
for _, event := range gotEvents {
if event.ExcludeFromSync {
return fmt.Errorf("SelectEventsWithEventIDs ExcludeFromSync should be false for current room state event %+v", event)
}
gotEventIDs[event.EventID()] = struct{}{}
}
for _, id := range wantEventIDs {
if _, ok := gotEventIDs[id]; !ok {
return fmt.Errorf("SelectEventsWithEventIDs\nexpected id %q not returned", id)
}
}
return nil
})
if err != nil {
t.Fatalf("err: %v", err)
}
})
}