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Support detach on transaction prepare

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Split method `transaction::xa_detach()` in `before_xa_detach()` and
`after_xa_detach()`. This allows to handle bf abort or replay while
transaction is detaching and to distinguish if a transaction is bf
aborted before or after the DBMS has detached a transaction from its
storage engine.
This commit is contained in:
Daniele Sciascia
2022-10-10 11:14:35 +02:00
parent 5185ad3481
commit de2ead8d70
9 changed files with 187 additions and 37 deletions
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20
include/wsrep/client_state.hpp
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@@ -519,17 +519,31 @@ namespace wsrep
* transaction disconnects, and the transaction must not rollback.
* After this call, a different client may later attempt to terminate
* the transaction by calling method commit_by_xid() or rollback_by_xid().
*
* @return Zero on success, non-zero if the transaction was BF aborted
*/
int before_xa_detach();
/**
* This method should be called to conclude the XA detach operation,
* after the DBMS has detached the transaction.
*
* @return Zero on success, non-zero if transaction was BF aborted
*/
int after_xa_detach();
/**
* @deprecated Use before_xa_detach() and after_xa_detach()
*/
void xa_detach();
/**
* Replay a XA transaction
*
* Replay a XA transaction that is in s_idle state.
* Replay a local XA transaction in s_idle state,
* or detached.
* This may happen if the transaction is BF aborted
* between prepare and commit.
* Since the victim is idle, this method can be called
* by the BF aborter or the backround rollbacker.
*/
void xa_replay();