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Fix fragility of selectEventsWithEventIDsSQL queries (#2757)

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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

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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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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) {