c-treeDB API API for C

ctdbSetAutoCommit

Sets the c-treeDB API auto commit mode.

Declaration

CTDBRET ctdbDECL ctdbSetAutoCommit(CTHANDLE Handle, CTBOOL flag);

Description

ctdbSetAutoCommit() sets the c-treeDB API auto commit mode. The auto commit of transactions are invoked automatically when records are added or updated by a ctdbWriteRecord() call. Automatic transactions may increase performance by reducing network traffic for single record updates since this is equivalent of performing the following functions:

ctdbBegin();

if (ctdbWriteRecord() == CTDBRET_OK)

ctdbCommit();

else

ctdbAbort();

Handle is a session handle.
flag indicates if auto commit mode should be enabled or not.

The following apply when an automatic transaction is performed:

An automatic transaction will only free locks acquired by the ctdbWriteRecord() function.
If an automatic transaction is aborted because of errors detected by ctdbWriteRecord(), all locks acquired by ctdbWriteRecord() are released.
If locks are active, by calling ctdbLock() function, an automatic transaction will not release any locks when it commits or aborts the ctdbWriteRecord() operation.
If OPS_UNLOCK_UPD is on, both commits and aborts on automatic transactions release only locks obtained within trans and/or locks on records updated within transaction, regardless if the c-treeDB API session lock state is active or not.

Return Values

Value	Symbolic Constant	Explanation
0	CTDBRET_OK	No Error