X11,
понимаю, но я практически уверен, что транзакция по умолчанию стартует автоматом (AutoCommit = True), в отличие от транзакций указанных для отдельных датасетов и запросов.
https://www.devart.com/unidac/docs/work_transaction.htm After you have activated a transaction, all operations, including dataset opening, will be performed within the context of the current transaction until you commit or rollback it. If no transactions were started, changes performed by each operation are reflected in database right after the operation is completed (so-called AutoCommit mode). When using InterBase provider, please pay attention to the AutoCommit property. The AutoCommit property has the True value by default that leads to automatically execution of CommitRetaining or RollbackRetaining when there is any data modification. By setting the property to False, you will get rid of this behavior, however, you will have to manage the transactions by yourself. The TUniConnection.AutoCommit property has a higher priority than the specific option "AutoCommit" of datasets (TUniQuery, TUniTable). If the TUniConnection.AutoCommit property is set to False, all transactions can be committed only explicitly (despite of the specific option "AutoCommit" value of a dataset). If you want most datasets to automatically commit transactions, and for some of them to control transactions manually, you should set the TUniConnection.AutoCommit property to True, and only for datasets with manual transaction control, set the specific option "AutoCommit" value to False.
