RELEASE SAVEPOINT

`RELEASE SAVEPOINT`

Releases a savepoint

Syntax

RELEASE SAVEPOINT sp_name [ONLY]

Table 1. RELEASE SAVEPOINT Statement Parameter
Parameter	Description
sp_name	Savepoint name.Available only in DSQL

The statement RELEASE SAVEPOINT erases a named savepoint, freeing up all the resources it encompasses.By default, all the savepoints created after the named savepoint are released as well.The qualifier ONLY directs the engine to release only the named savepoint.

Internal Savepoints

By default, the engine uses an automatic transaction-level system savepoint to perform transaction rollback.When a ROLLBACK statement is issued, all changes performed in this transaction are backed out via a transaction-level savepoint, and the transaction is then committed.This logic reduces the amount of garbage collection caused by rolled back transactions.

When the volume of changes performed under a transaction-level savepoint is getting large (~50000 records affected), the engine releases the transaction-level savepoint and uses the Transaction Inventory Page (TIP) as a mechanism to roll back the transaction if needed.

Tip	If you expect the volume of changes in your transaction to be large, you can specify the `NO AUTO UNDO` option in your `SET TRANSACTION` statement to block the creation of the transaction-level savepoint.Using the API, you can set this with the TPB flag `isc_tpb_no_auto_undo`.