system.transactions_info_log

Contains information about all transactions executed on a current server.

It is safe to truncate or drop this table at any time.

Columns:

• hostname (LowCardinality(String)) — The hostname where transaction was executed.
• type (Enum8(‘Begin’ = 1, ‘Commit’ = 2, ‘Rollback’ = 3, ‘AddPart’ = 10, ‘LockPart’ = 11, ‘UnlockPart’ = 12)) — The type of the transaction. Possible values: Begin, Commit, Rollback, AddPart, LockPart, UnlockPart.
• event_date (Date) — Date of the entry.
• event_time (DateTime64(6)) — Time of the entry
• thread_id (UInt64) — The identifier of a thread.
• query_id (String) — The ID of a query executed in a scope of transaction.
• tid (Tuple(UInt64, UInt64, UUID)) — The identifier of a transaction.
• tid_hash (UInt64) — The hash of the identifier.
• csn (UInt64) — The Commit Sequence Number
• database (String) — The name of the database the transaction was executed against.
• table (String) — The name of the table the transaction was executed against.
• uuid (UUID) — The uuid of the table the transaction was executed against.
• part (String) — The name of the part participated in the transaction.