Function ReadBufferWithoutRelcache

src/backend/storage/buffer/bufmgr.c:869–886

* ReadBufferWithoutRelcache -- like ReadBufferExtended, but doesn't require * a relcache entry for the relation. * * NB: At present, this function may only be used on permanent relations, which * is OK, because we only use it during XLOG replay. If in the future we * want to use it on temporary or unlogged relations, we could pass additional * parameters. */

 * parameters.
 */
Buffer
ReadBufferWithoutRelcache(RelFileNode rnode, ForkNumber forkNum,
						  BlockNumber blockNum, ReadBufferMode mode,
						  BufferAccessStrategy strategy)
{
	bool		hit;

	/*
	 * Use default SMGR implementation when opening a relation backed by
	 * shared buffers
	 */
	SMgrRelation smgr = smgropen(rnode, InvalidBackendId, 0, NULL);

	Assert(InRecovery);

	return ReadBuffer_common(smgr, RELPERSISTENCE_PERMANENT, forkNum, blockNum,
							 mode, strategy, &hit);
}


/*