diff options
| -rw-r--r-- | changelog.d/8729.bugfix | 1 | ||||
| -rwxr-xr-x | scripts/synapse_port_db | 12 |
2 files changed, 6 insertions, 7 deletions
diff --git a/changelog.d/8729.bugfix b/changelog.d/8729.bugfix new file mode 100644 index 0000000000..7f59a3b9e2 --- /dev/null +++ b/changelog.d/8729.bugfix @@ -0,0 +1 @@ +Fix port script fails when DB has no backfilled events. Broke in v1.21.0. diff --git a/scripts/synapse_port_db b/scripts/synapse_port_db index 7a638ea8e3..604b961bd2 100755 --- a/scripts/synapse_port_db +++ b/scripts/synapse_port_db @@ -876,14 +876,12 @@ class Porter(object): "ALTER SEQUENCE events_stream_seq RESTART WITH %s", (next_id,) ) - txn.execute("SELECT -MIN(stream_ordering) FROM events") + txn.execute("SELECT GREATEST(-MIN(stream_ordering), 1) FROM events") curr_id = txn.fetchone()[0] - if curr_id: - next_id = curr_id + 1 - txn.execute( - "ALTER SEQUENCE events_backfill_stream_seq RESTART WITH %s", - (next_id,), - ) + next_id = curr_id + 1 + txn.execute( + "ALTER SEQUENCE events_backfill_stream_seq RESTART WITH %s", (next_id,), + ) return self.postgres_store.db_pool.runInteraction( "_setup_events_stream_seqs", r |