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In CREATE SEQUENCE or CREATE TEMPORARY SEQUENCE, we should not start an InnoDB transaction for inserting the sequence status record into the underlying no-rollback table. Because we did this, a debug assertion failure would fail in START TRANSACTION WITH CONSISTENT SNAPSHOT after CREATE TEMPORARY SEQUENCE was executed. row_ins_step(): Do not start the transaction. Let the caller do that. que_thr_step(): Start the transaction before calling row_ins_step(). row_ins_clust_index_entry(): Skip locking and undo logging for no-rollback tables, even for temporary no-rollback tables. row_ins_index_entry(): Allow trx->id==0 for no-rollback tables. row_insert_for_mysql(): Do not start a transaction for no-rollback tables.