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Changes to the Firebird API and ODS

isc_info_tra_oldest_snapshot

Returns the number of the lowest tra_oldest_active of all transactions that were active when the current transaction started.

Note

This value is used as the threshold ("high-water mark") for garbage collection.

isc_info_tra_isolation

Returns the isolation level of the current transaction. The format of the returned clumplets is:

isc_info_tra_isolation,

1, isc_info_tra_consistency | isc_info_tra_concurrency | 2, isc_info_tra_read_committed,

isc_info_tra_no_rec_version | isc_info_tra_rec_version

That is, for Read Committed transactions, two items are returned (isolation level and record versioning policy) while, for other transactions, one item is returned (isolation level).

isc_info_tra_access

Returns the access mode (read-only or read-write) of the current transaction. The format of the returned clumplets is:

isc_info_tra_access, 1, isc_info_tra_readonly | isc_info_tra_readwrite

isc_info_tra_lock_timeout

Returns the lock timeout set for the current transaction.

Improved Services API

The following improvements have been added to the Services API:

Parameter isc_spb_trusted_auth

(V.2.1, ODS 11.1) isc_spb_trusted_auth applies only to Windows and is used to force Firebird to use Windows trusted authentication for the requested service.

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