XA_PREPARE_LOG_EVENT

This event records the preparation phase of an XA transaction, storing the XID to support two-phase commit and recovery.

An XA_PREPARE_LOG_EVENT records the prepare phase of a distributed transaction using the XA log. It is used to ensure atomicity and consistency of transactions.

Header

• Event Type is XA_PREPARE_LOG_EVENT (0x26).

Fields

• uint<1> One Phase Commit.

• uint<4> Format ID.

• uint<4> Length of gtrid.

• uint<1> Length of bqual.

Payload:

• byte<n> xid, where n is sum of gtrid and bqual lengths.

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