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| -rw-r--r-- | synapse/storage/state.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/storage/state.py b/synapse/storage/state.py index 382f308a60..d6643473db 100644 --- a/synapse/storage/state.py +++ b/synapse/storage/state.py @@ -315,6 +315,10 @@ class StateStore(SQLBaseStore): # against `state_groups_state` to fetch the latest state. # It assumes that previous state groups are always numerically # lesser. + # The PARTITION is used to get the event_id in the greatest state + # group for the given type, state_key. + # This may return multiple rows per (type, state_key), but last_value + # should be the same. sql = (""" WITH RECURSIVE state(state_group) AS ( VALUES(?::bigint) |