/*
* ProcessCommittedInvalidationMessages is executed by xact_redo_commit()
* to process invalidation messages added to commit records.
*
* Relcache init file invalidation requires processing both
* before and after we send the SI messages. See AtEOXact_Inval()
*/
void
ProcessCommittedInvalidationMessages(SharedInvalidationMessage *msgs,
int nmsgs, bool RelcacheInitFileInval,
Oid dbid, Oid tsid)
{
if (nmsgs <= 0)
return;
elog(trace_recovery(DEBUG4), "replaying commit with %d messages%s", nmsgs,
(RelcacheInitFileInval ? " and relcache file invalidation" : ""));
if (RelcacheInitFileInval)
{
/*
* RelationCacheInitFilePreInvalidate requires DatabasePath to be set,
* but we should not use SetDatabasePath during recovery, since it is
* intended to be used only once by normal backends. Hence, a quick
* hack: set DatabasePath directly then unset after use.
*/
DatabasePath = GetDatabasePath(dbid, tsid);
elog(trace_recovery(DEBUG4), "removing relcache init file in \"%s\"",
DatabasePath);
RelationCacheInitFilePreInvalidate();
pfree(DatabasePath);
DatabasePath = NULL;
}
SendSharedInvalidMessages(msgs, nmsgs);
if (RelcacheInitFileInval)
RelationCacheInitFilePostInvalidate();
}
/*
* AtEOXact_Inval
* Process queued-up invalidation messages at end of main transaction.
*
* If isCommit, we must send out the messages in our PriorCmdInvalidMsgs list
* to the shared invalidation message queue. Note that these will be read
* not only by other backends, but also by our own backend at the next
* transaction start (via AcceptInvalidationMessages). This means that
* we can skip immediate local processing of anything that's still in
* CurrentCmdInvalidMsgs, and just send that list out too.
*
* If not isCommit, we are aborting, and must locally process the messages
* in PriorCmdInvalidMsgs. No messages need be sent to other backends,
* since they'll not have seen our changed tuples anyway. We can forget
* about CurrentCmdInvalidMsgs too, since those changes haven't touched
* the caches yet.
*
* In any case, reset the various lists to empty. We need not physically
* free memory here, since TopTransactionContext is about to be emptied
* anyway.
*
* Note:
* This should be called as the last step in processing a transaction.
*/
void
AtEOXact_Inval(bool isCommit)
{
/* Quick exit if no messages */
if (transInvalInfo == NULL)
return;
/* Must be at top of stack */
Assert(transInvalInfo->my_level == 1 && transInvalInfo->parent == NULL);
if (isCommit)
{
/*
* Relcache init file invalidation requires processing both before and
* after we send the SI messages. However, we need not do anything
* unless we committed.
*/
if (transInvalInfo->RelcacheInitFileInval)
RelationCacheInitFilePreInvalidate();
AppendInvalidationMessages(&transInvalInfo->PriorCmdInvalidMsgs,
&transInvalInfo->CurrentCmdInvalidMsgs);
ProcessInvalidationMessagesMulti(&transInvalInfo->PriorCmdInvalidMsgs,
SendSharedInvalidMessages);
if (transInvalInfo->RelcacheInitFileInval)
RelationCacheInitFilePostInvalidate();
}
else
{
ProcessInvalidationMessages(&transInvalInfo->PriorCmdInvalidMsgs,
LocalExecuteInvalidationMessage);
}
/* Need not free anything explicitly */
transInvalInfo = NULL;
SharedInvalidMessagesArray = NULL;
numSharedInvalidMessagesArray = 0;
}
/*
* inval_twophase_postcommit
* Process an invalidation message from the 2PC state file.
*/
void
inval_twophase_postcommit(TransactionId xid, uint16 info,
void *recdata, uint32 len)
{
SharedInvalidationMessage *msg;
switch (info)
{
case TWOPHASE_INFO_MSG:
msg = (SharedInvalidationMessage *) recdata;
Assert(len == sizeof(SharedInvalidationMessage));
SendSharedInvalidMessage(msg);
break;
case TWOPHASE_INFO_FILE_BEFORE:
RelationCacheInitFilePreInvalidate();
break;
case TWOPHASE_INFO_FILE_AFTER:
RelationCacheInitFilePostInvalidate();
break;
default:
Assert(false);
break;
}
}