mariadb-set-transaction

MariaDB-specific behavior for SET TRANSACTION and transaction isolation — the GLOBAL/SESSION/next-transaction scope rule, the transaction_isolation system variable (successor to deprecated tx_isolation), READ WRITE/READ ONLY access mode, and innodb_snapshot_isolation write-write conflict detection (ON by default under REPEATABLE READ since 11.6.2, raising ER_CHECKREAD/1020 and rolling back the whole transaction). Use when writing, generating, or reviewing SET TRANSACTION statements, isolation-level configuration, or transaction retry logic that must handle MariaDB's snapshot-isolation error path.