Firebird 2.1 Release Notes

Changes to the Firebird API and ODS
The current value of FB_API_VER is 20 (two-digit equivalent of 2.0). This macro can be used by client applications
to check the version of ibase.h its being compiled with.
Additions to the isc_database_info() Structure
V. Khorsun
The following items have been added to the isc_database_info() function call structure:
isc_info_active_tran_count
Returns the number of currently active transactions.
isc_info_creation_date
Returns the date and time when the database was [re]created.
To decode the returned value, call isc_vax_integer twice to extract (first) the date and (second) the time
portions of the ISC_TIMESTAMP. Then, use isc_decode_timestamp() as usual.
Additions to the isc_transaction_info() Structure
V. Khorsun
The following items have been added to the isc_transaction_info() function call structure:
isc_info_tra_oldest_interesting
Returns the number of the oldest [interesting] transaction when the current transaction started. For snapshot
transactions, this is also the number of the oldest transaction in the private copy of the transaction inventory
page (TIP).
isc_info_tra_oldest_active
• For a read-committed transaction, returns the number of the current transaction.
• For all other transactions, returns the number of the oldest active transaction when the current transaction
started.
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.
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