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AUTO COMMIT

Specifying AUTO COMMIT enables auto-commit mode for the transaction.In auto-commit mode, Firebird will internally execute the equivalent of COMMIT RETAIN after each statement execution.

Caution

This is not a generally useful auto-commit mode;the same transaction context is retained until the transaction is ended through a commit or rollback.In other words, when you use SNAPSHOT or SNAPSHOT TABLE STABILITY, this auto-commit will not change record visibility (effects of transactions that were committed after this transaction was started will not be visible).

For READ COMMITTED, the same warnings apply as for commit retaining: prolonged use of a single transaction in auto-commit mode can inhibit garbage collection and degrade performance.

IGNORE LIMBO

This flag is used to signal that records created by limbo transactions are to be ignored.Transactions are left “in limbo” if the second stage of a two-phase commit fails.

Note
Historical Note

IGNORE LIMBO surfaces the TPB parameter isc_tpb_ignore_limbo, available in the API since InterBase times and is mainly used by gfix.