Example #1
0
/*
 * 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();
}
Example #2
0
/*
 * 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;
}
Example #3
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;
	}
}