Aborts explicit and implicit transactions.
After TTS Begin Transaction completes, TTS tracks all files that are currently open, as well as any files that are opened during the transaction. When an application writes to a transaction file, the file server automatically generates a physical record lock for any file that isn't already locked.
Locked files remain locked. Transaction files are not closed and unlocked until TTS End Transaction or TTS Abort Transaction executes.
If transaction files are updated, logical and physical record locks are held until the end of the transaction. If a transaction file is not updated, the logical or physical lock on that file can be released.