summaryrefslogtreecommitdiffstats
path: root/src/include/replication/reorderbuffer.h
blob: 4a01f877e5d79be4c7e2bcff3222a4a695c50424 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
/*
 * reorderbuffer.h
 *	  PostgreSQL logical replay/reorder buffer management.
 *
 * Copyright (c) 2012-2022, PostgreSQL Global Development Group
 *
 * src/include/replication/reorderbuffer.h
 */
#ifndef REORDERBUFFER_H
#define REORDERBUFFER_H

#include "access/htup_details.h"
#include "lib/ilist.h"
#include "storage/sinval.h"
#include "utils/hsearch.h"
#include "utils/relcache.h"
#include "utils/snapshot.h"
#include "utils/timestamp.h"

extern PGDLLIMPORT int logical_decoding_work_mem;

/* an individual tuple, stored in one chunk of memory */
typedef struct ReorderBufferTupleBuf
{
	/* position in preallocated list */
	slist_node	node;

	/* tuple header, the interesting bit for users of logical decoding */
	HeapTupleData tuple;

	/* pre-allocated size of tuple buffer, different from tuple size */
	Size		alloc_tuple_size;

	/* actual tuple data follows */
} ReorderBufferTupleBuf;

/* pointer to the data stored in a TupleBuf */
#define ReorderBufferTupleBufData(p) \
	((HeapTupleHeader) MAXALIGN(((char *) p) + sizeof(ReorderBufferTupleBuf)))

/*
 * Types of the change passed to a 'change' callback.
 *
 * For efficiency and simplicity reasons we want to keep Snapshots, CommandIds
 * and ComboCids in the same list with the user visible INSERT/UPDATE/DELETE
 * changes. Users of the decoding facilities will never see changes with
 * *_INTERNAL_* actions.
 *
 * The INTERNAL_SPEC_INSERT and INTERNAL_SPEC_CONFIRM, and INTERNAL_SPEC_ABORT
 * changes concern "speculative insertions", their confirmation, and abort
 * respectively.  They're used by INSERT .. ON CONFLICT .. UPDATE.  Users of
 * logical decoding don't have to care about these.
 */
typedef enum ReorderBufferChangeType
{
	REORDER_BUFFER_CHANGE_INSERT,
	REORDER_BUFFER_CHANGE_UPDATE,
	REORDER_BUFFER_CHANGE_DELETE,
	REORDER_BUFFER_CHANGE_MESSAGE,
	REORDER_BUFFER_CHANGE_INVALIDATION,
	REORDER_BUFFER_CHANGE_INTERNAL_SNAPSHOT,
	REORDER_BUFFER_CHANGE_INTERNAL_COMMAND_ID,
	REORDER_BUFFER_CHANGE_INTERNAL_TUPLECID,
	REORDER_BUFFER_CHANGE_INTERNAL_SPEC_INSERT,
	REORDER_BUFFER_CHANGE_INTERNAL_SPEC_CONFIRM,
	REORDER_BUFFER_CHANGE_INTERNAL_SPEC_ABORT,
	REORDER_BUFFER_CHANGE_TRUNCATE
} ReorderBufferChangeType;

/* forward declaration */
struct ReorderBufferTXN;

/*
 * a single 'change', can be an insert (with one tuple), an update (old, new),
 * or a delete (old).
 *
 * The same struct is also used internally for other purposes but that should
 * never be visible outside reorderbuffer.c.
 */
typedef struct ReorderBufferChange
{
	XLogRecPtr	lsn;

	/* The type of change. */
	ReorderBufferChangeType action;

	/* Transaction this change belongs to. */
	struct ReorderBufferTXN *txn;

	RepOriginId origin_id;

	/*
	 * Context data for the change. Which part of the union is valid depends
	 * on action.
	 */
	union
	{
		/* Old, new tuples when action == *_INSERT|UPDATE|DELETE */
		struct
		{
			/* relation that has been changed */
			RelFileNode relnode;

			/* no previously reassembled toast chunks are necessary anymore */
			bool		clear_toast_afterwards;

			/* valid for DELETE || UPDATE */
			ReorderBufferTupleBuf *oldtuple;
			/* valid for INSERT || UPDATE */
			ReorderBufferTupleBuf *newtuple;
		}			tp;

		/*
		 * Truncate data for REORDER_BUFFER_CHANGE_TRUNCATE representing one
		 * set of relations to be truncated.
		 */
		struct
		{
			Size		nrelids;
			bool		cascade;
			bool		restart_seqs;
			Oid		   *relids;
		}			truncate;

		/* Message with arbitrary data. */
		struct
		{
			char	   *prefix;
			Size		message_size;
			char	   *message;
		}			msg;

		/* New snapshot, set when action == *_INTERNAL_SNAPSHOT */
		Snapshot	snapshot;

		/*
		 * New command id for existing snapshot in a catalog changing tx. Set
		 * when action == *_INTERNAL_COMMAND_ID.
		 */
		CommandId	command_id;

		/*
		 * New cid mapping for catalog changing transaction, set when action
		 * == *_INTERNAL_TUPLECID.
		 */
		struct
		{
			RelFileNode node;
			ItemPointerData tid;
			CommandId	cmin;
			CommandId	cmax;
			CommandId	combocid;
		}			tuplecid;

		/* Invalidation. */
		struct
		{
			uint32		ninvalidations; /* Number of messages */
			SharedInvalidationMessage *invalidations;	/* invalidation message */
		}			inval;
	}			data;

	/*
	 * While in use this is how a change is linked into a transactions,
	 * otherwise it's the preallocated list.
	 */
	dlist_node	node;
} ReorderBufferChange;

/* ReorderBufferTXN txn_flags */
#define RBTXN_HAS_CATALOG_CHANGES 0x0001
#define RBTXN_IS_SUBXACT          0x0002
#define RBTXN_IS_SERIALIZED       0x0004
#define RBTXN_IS_SERIALIZED_CLEAR 0x0008
#define RBTXN_IS_STREAMED         0x0010
#define RBTXN_HAS_PARTIAL_CHANGE  0x0020
#define RBTXN_PREPARE             0x0040
#define RBTXN_SKIPPED_PREPARE	  0x0080

/* Does the transaction have catalog changes? */
#define rbtxn_has_catalog_changes(txn) \
( \
	 ((txn)->txn_flags & RBTXN_HAS_CATALOG_CHANGES) != 0 \
)

/* Is the transaction known as a subxact? */
#define rbtxn_is_known_subxact(txn) \
( \
	((txn)->txn_flags & RBTXN_IS_SUBXACT) != 0 \
)

/* Has this transaction been spilled to disk? */
#define rbtxn_is_serialized(txn) \
( \
	((txn)->txn_flags & RBTXN_IS_SERIALIZED) != 0 \
)

/* Has this transaction ever been spilled to disk? */
#define rbtxn_is_serialized_clear(txn) \
( \
	((txn)->txn_flags & RBTXN_IS_SERIALIZED_CLEAR) != 0 \
)

/* Has this transaction contains partial changes? */
#define rbtxn_has_partial_change(txn) \
( \
	((txn)->txn_flags & RBTXN_HAS_PARTIAL_CHANGE) != 0 \
)

/*
 * Has this transaction been streamed to downstream?
 *
 * (It's not possible to deduce this from nentries and nentries_mem for
 * various reasons. For example, all changes may be in subtransactions in
 * which case we'd have nentries==0 for the toplevel one, which would say
 * nothing about the streaming. So we maintain this flag, but only for the
 * toplevel transaction.)
 */
#define rbtxn_is_streamed(txn) \
( \
	((txn)->txn_flags & RBTXN_IS_STREAMED) != 0 \
)

/* Has this transaction been prepared? */
#define rbtxn_prepared(txn) \
( \
	((txn)->txn_flags & RBTXN_PREPARE) != 0 \
)

/* prepare for this transaction skipped? */
#define rbtxn_skip_prepared(txn) \
( \
	((txn)->txn_flags & RBTXN_SKIPPED_PREPARE) != 0 \
)

typedef struct ReorderBufferTXN
{
	/* See above */
	bits32		txn_flags;

	/* The transaction's transaction id, can be a toplevel or sub xid. */
	TransactionId xid;

	/* Xid of top-level transaction, if known */
	TransactionId toplevel_xid;

	/*
	 * Global transaction id required for identification of prepared
	 * transactions.
	 */
	char	   *gid;

	/*
	 * LSN of the first data carrying, WAL record with knowledge about this
	 * xid. This is allowed to *not* be first record adorned with this xid, if
	 * the previous records aren't relevant for logical decoding.
	 */
	XLogRecPtr	first_lsn;

	/* ----
	 * LSN of the record that lead to this xact to be prepared or committed or
	 * aborted. This can be a
	 * * plain commit record
	 * * plain commit record, of a parent transaction
	 * * prepared tansaction
	 * * prepared transaction commit
	 * * plain abort record
	 * * prepared transaction abort
	 *
	 * This can also become set to earlier values than transaction end when
	 * a transaction is spilled to disk; specifically it's set to the LSN of
	 * the latest change written to disk so far.
	 * ----
	 */
	XLogRecPtr	final_lsn;

	/*
	 * LSN pointing to the end of the commit record + 1.
	 */
	XLogRecPtr	end_lsn;

	/* Toplevel transaction for this subxact (NULL for top-level). */
	struct ReorderBufferTXN *toptxn;

	/*
	 * LSN of the last lsn at which snapshot information reside, so we can
	 * restart decoding from there and fully recover this transaction from
	 * WAL.
	 */
	XLogRecPtr	restart_decoding_lsn;

	/* origin of the change that caused this transaction */
	RepOriginId origin_id;
	XLogRecPtr	origin_lsn;

	/*
	 * Commit or Prepare time, only known when we read the actual commit or
	 * prepare record.
	 */
	union
	{
		TimestampTz commit_time;
		TimestampTz prepare_time;
	}			xact_time;

	/*
	 * The base snapshot is used to decode all changes until either this
	 * transaction modifies the catalog, or another catalog-modifying
	 * transaction commits.
	 */
	Snapshot	base_snapshot;
	XLogRecPtr	base_snapshot_lsn;
	dlist_node	base_snapshot_node; /* link in txns_by_base_snapshot_lsn */

	/*
	 * Snapshot/CID from the previous streaming run. Only valid for already
	 * streamed transactions (NULL/InvalidCommandId otherwise).
	 */
	Snapshot	snapshot_now;
	CommandId	command_id;

	/*
	 * How many ReorderBufferChange's do we have in this txn.
	 *
	 * Changes in subtransactions are *not* included but tracked separately.
	 */
	uint64		nentries;

	/*
	 * How many of the above entries are stored in memory in contrast to being
	 * spilled to disk.
	 */
	uint64		nentries_mem;

	/*
	 * List of ReorderBufferChange structs, including new Snapshots, new
	 * CommandIds and command invalidation messages.
	 */
	dlist_head	changes;

	/*
	 * List of (relation, ctid) => (cmin, cmax) mappings for catalog tuples.
	 * Those are always assigned to the toplevel transaction. (Keep track of
	 * #entries to create a hash of the right size)
	 */
	dlist_head	tuplecids;
	uint64		ntuplecids;

	/*
	 * On-demand built hash for looking up the above values.
	 */
	HTAB	   *tuplecid_hash;

	/*
	 * Hash containing (potentially partial) toast entries. NULL if no toast
	 * tuples have been found for the current change.
	 */
	HTAB	   *toast_hash;

	/*
	 * non-hierarchical list of subtransactions that are *not* aborted. Only
	 * used in toplevel transactions.
	 */
	dlist_head	subtxns;
	uint32		nsubtxns;

	/*
	 * Stored cache invalidations. This is not a linked list because we get
	 * all the invalidations at once.
	 */
	uint32		ninvalidations;
	SharedInvalidationMessage *invalidations;

	/* ---
	 * Position in one of three lists:
	 * * list of subtransactions if we are *known* to be subxact
	 * * list of toplevel xacts (can be an as-yet unknown subxact)
	 * * list of preallocated ReorderBufferTXNs (if unused)
	 * ---
	 */
	dlist_node	node;

	/*
	 * Size of this transaction (changes currently in memory, in bytes).
	 */
	Size		size;

	/* Size of top-transaction including sub-transactions. */
	Size		total_size;

	/* If we have detected concurrent abort then ignore future changes. */
	bool		concurrent_abort;

	/*
	 * Private data pointer of the output plugin.
	 */
	void	   *output_plugin_private;
} ReorderBufferTXN;

/* so we can define the callbacks used inside struct ReorderBuffer itself */
typedef struct ReorderBuffer ReorderBuffer;

/* change callback signature */
typedef void (*ReorderBufferApplyChangeCB) (ReorderBuffer *rb,
											ReorderBufferTXN *txn,
											Relation relation,
											ReorderBufferChange *change);

/* truncate callback signature */
typedef void (*ReorderBufferApplyTruncateCB) (ReorderBuffer *rb,
											  ReorderBufferTXN *txn,
											  int nrelations,
											  Relation relations[],
											  ReorderBufferChange *change);

/* begin callback signature */
typedef void (*ReorderBufferBeginCB) (ReorderBuffer *rb,
									  ReorderBufferTXN *txn);

/* commit callback signature */
typedef void (*ReorderBufferCommitCB) (ReorderBuffer *rb,
									   ReorderBufferTXN *txn,
									   XLogRecPtr commit_lsn);

/* message callback signature */
typedef void (*ReorderBufferMessageCB) (ReorderBuffer *rb,
										ReorderBufferTXN *txn,
										XLogRecPtr message_lsn,
										bool transactional,
										const char *prefix, Size sz,
										const char *message);

/* begin prepare callback signature */
typedef void (*ReorderBufferBeginPrepareCB) (ReorderBuffer *rb,
											 ReorderBufferTXN *txn);

/* prepare callback signature */
typedef void (*ReorderBufferPrepareCB) (ReorderBuffer *rb,
										ReorderBufferTXN *txn,
										XLogRecPtr prepare_lsn);

/* commit prepared callback signature */
typedef void (*ReorderBufferCommitPreparedCB) (ReorderBuffer *rb,
											   ReorderBufferTXN *txn,
											   XLogRecPtr commit_lsn);

/* rollback  prepared callback signature */
typedef void (*ReorderBufferRollbackPreparedCB) (ReorderBuffer *rb,
												 ReorderBufferTXN *txn,
												 XLogRecPtr prepare_end_lsn,
												 TimestampTz prepare_time);

/* start streaming transaction callback signature */
typedef void (*ReorderBufferStreamStartCB) (
											ReorderBuffer *rb,
											ReorderBufferTXN *txn,
											XLogRecPtr first_lsn);

/* stop streaming transaction callback signature */
typedef void (*ReorderBufferStreamStopCB) (
										   ReorderBuffer *rb,
										   ReorderBufferTXN *txn,
										   XLogRecPtr last_lsn);

/* discard streamed transaction callback signature */
typedef void (*ReorderBufferStreamAbortCB) (
											ReorderBuffer *rb,
											ReorderBufferTXN *txn,
											XLogRecPtr abort_lsn);

/* prepare streamed transaction callback signature */
typedef void (*ReorderBufferStreamPrepareCB) (
											  ReorderBuffer *rb,
											  ReorderBufferTXN *txn,
											  XLogRecPtr prepare_lsn);

/* commit streamed transaction callback signature */
typedef void (*ReorderBufferStreamCommitCB) (
											 ReorderBuffer *rb,
											 ReorderBufferTXN *txn,
											 XLogRecPtr commit_lsn);

/* stream change callback signature */
typedef void (*ReorderBufferStreamChangeCB) (
											 ReorderBuffer *rb,
											 ReorderBufferTXN *txn,
											 Relation relation,
											 ReorderBufferChange *change);

/* stream message callback signature */
typedef void (*ReorderBufferStreamMessageCB) (
											  ReorderBuffer *rb,
											  ReorderBufferTXN *txn,
											  XLogRecPtr message_lsn,
											  bool transactional,
											  const char *prefix, Size sz,
											  const char *message);

/* stream truncate callback signature */
typedef void (*ReorderBufferStreamTruncateCB) (
											   ReorderBuffer *rb,
											   ReorderBufferTXN *txn,
											   int nrelations,
											   Relation relations[],
											   ReorderBufferChange *change);

struct ReorderBuffer
{
	/*
	 * xid => ReorderBufferTXN lookup table
	 */
	HTAB	   *by_txn;

	/*
	 * Transactions that could be a toplevel xact, ordered by LSN of the first
	 * record bearing that xid.
	 */
	dlist_head	toplevel_by_lsn;

	/*
	 * Transactions and subtransactions that have a base snapshot, ordered by
	 * LSN of the record which caused us to first obtain the base snapshot.
	 * This is not the same as toplevel_by_lsn, because we only set the base
	 * snapshot on the first logical-decoding-relevant record (eg. heap
	 * writes), whereas the initial LSN could be set by other operations.
	 */
	dlist_head	txns_by_base_snapshot_lsn;

	/*
	 * one-entry sized cache for by_txn. Very frequently the same txn gets
	 * looked up over and over again.
	 */
	TransactionId by_txn_last_xid;
	ReorderBufferTXN *by_txn_last_txn;

	/*
	 * Callbacks to be called when a transactions commits.
	 */
	ReorderBufferBeginCB begin;
	ReorderBufferApplyChangeCB apply_change;
	ReorderBufferApplyTruncateCB apply_truncate;
	ReorderBufferCommitCB commit;
	ReorderBufferMessageCB message;

	/*
	 * Callbacks to be called when streaming a transaction at prepare time.
	 */
	ReorderBufferBeginCB begin_prepare;
	ReorderBufferPrepareCB prepare;
	ReorderBufferCommitPreparedCB commit_prepared;
	ReorderBufferRollbackPreparedCB rollback_prepared;

	/*
	 * Callbacks to be called when streaming a transaction.
	 */
	ReorderBufferStreamStartCB stream_start;
	ReorderBufferStreamStopCB stream_stop;
	ReorderBufferStreamAbortCB stream_abort;
	ReorderBufferStreamPrepareCB stream_prepare;
	ReorderBufferStreamCommitCB stream_commit;
	ReorderBufferStreamChangeCB stream_change;
	ReorderBufferStreamMessageCB stream_message;
	ReorderBufferStreamTruncateCB stream_truncate;

	/*
	 * Pointer that will be passed untouched to the callbacks.
	 */
	void	   *private_data;

	/*
	 * Saved output plugin option
	 */
	bool		output_rewrites;

	/*
	 * Private memory context.
	 */
	MemoryContext context;

	/*
	 * Memory contexts for specific types objects
	 */
	MemoryContext change_context;
	MemoryContext txn_context;
	MemoryContext tup_context;

	XLogRecPtr	current_restart_decoding_lsn;

	/* buffer for disk<->memory conversions */
	char	   *outbuf;
	Size		outbufsize;

	/* memory accounting */
	Size		size;

	/*
	 * Statistics about transactions spilled to disk.
	 *
	 * A single transaction may be spilled repeatedly, which is why we keep
	 * two different counters. For spilling, the transaction counter includes
	 * both toplevel transactions and subtransactions.
	 */
	int64		spillTxns;		/* number of transactions spilled to disk */
	int64		spillCount;		/* spill-to-disk invocation counter */
	int64		spillBytes;		/* amount of data spilled to disk */

	/* Statistics about transactions streamed to the decoding output plugin */
	int64		streamTxns;		/* number of transactions streamed */
	int64		streamCount;	/* streaming invocation counter */
	int64		streamBytes;	/* amount of data decoded */

	/*
	 * Statistics about all the transactions sent to the decoding output
	 * plugin
	 */
	int64		totalTxns;		/* total number of transactions sent */
	int64		totalBytes;		/* total amount of data decoded */
};


extern ReorderBuffer *ReorderBufferAllocate(void);
extern void ReorderBufferFree(ReorderBuffer *);

extern ReorderBufferTupleBuf *ReorderBufferGetTupleBuf(ReorderBuffer *, Size tuple_len);
extern void ReorderBufferReturnTupleBuf(ReorderBuffer *, ReorderBufferTupleBuf *tuple);
extern ReorderBufferChange *ReorderBufferGetChange(ReorderBuffer *);
extern void ReorderBufferReturnChange(ReorderBuffer *, ReorderBufferChange *, bool);

extern Oid *ReorderBufferGetRelids(ReorderBuffer *, int nrelids);
extern void ReorderBufferReturnRelids(ReorderBuffer *, Oid *relids);

extern void ReorderBufferQueueChange(ReorderBuffer *, TransactionId,
									 XLogRecPtr lsn, ReorderBufferChange *,
									 bool toast_insert);
extern void ReorderBufferQueueMessage(ReorderBuffer *, TransactionId, Snapshot snapshot, XLogRecPtr lsn,
									  bool transactional, const char *prefix,
									  Size message_size, const char *message);
extern void ReorderBufferCommit(ReorderBuffer *, TransactionId,
								XLogRecPtr commit_lsn, XLogRecPtr end_lsn,
								TimestampTz commit_time, RepOriginId origin_id, XLogRecPtr origin_lsn);
extern void ReorderBufferFinishPrepared(ReorderBuffer *rb, TransactionId xid,
										XLogRecPtr commit_lsn, XLogRecPtr end_lsn,
										XLogRecPtr two_phase_at,
										TimestampTz commit_time,
										RepOriginId origin_id, XLogRecPtr origin_lsn,
										char *gid, bool is_commit);
extern void ReorderBufferAssignChild(ReorderBuffer *, TransactionId, TransactionId, XLogRecPtr commit_lsn);
extern void ReorderBufferCommitChild(ReorderBuffer *, TransactionId, TransactionId,
									 XLogRecPtr commit_lsn, XLogRecPtr end_lsn);
extern void ReorderBufferAbort(ReorderBuffer *, TransactionId, XLogRecPtr lsn);
extern void ReorderBufferAbortOld(ReorderBuffer *, TransactionId xid);
extern void ReorderBufferForget(ReorderBuffer *, TransactionId, XLogRecPtr lsn);
extern void ReorderBufferInvalidate(ReorderBuffer *, TransactionId, XLogRecPtr lsn);

extern void ReorderBufferSetBaseSnapshot(ReorderBuffer *, TransactionId, XLogRecPtr lsn, struct SnapshotData *snap);
extern void ReorderBufferAddSnapshot(ReorderBuffer *, TransactionId, XLogRecPtr lsn, struct SnapshotData *snap);
extern void ReorderBufferAddNewCommandId(ReorderBuffer *, TransactionId, XLogRecPtr lsn,
										 CommandId cid);
extern void ReorderBufferAddNewTupleCids(ReorderBuffer *, TransactionId, XLogRecPtr lsn,
										 RelFileNode node, ItemPointerData pt,
										 CommandId cmin, CommandId cmax, CommandId combocid);
extern void ReorderBufferAddInvalidations(ReorderBuffer *, TransactionId, XLogRecPtr lsn,
										  Size nmsgs, SharedInvalidationMessage *msgs);
extern void ReorderBufferImmediateInvalidation(ReorderBuffer *, uint32 ninvalidations,
											   SharedInvalidationMessage *invalidations);
extern void ReorderBufferProcessXid(ReorderBuffer *, TransactionId xid, XLogRecPtr lsn);

extern void ReorderBufferXidSetCatalogChanges(ReorderBuffer *, TransactionId xid, XLogRecPtr lsn);
extern bool ReorderBufferXidHasCatalogChanges(ReorderBuffer *, TransactionId xid);
extern bool ReorderBufferXidHasBaseSnapshot(ReorderBuffer *, TransactionId xid);

extern bool ReorderBufferRememberPrepareInfo(ReorderBuffer *rb, TransactionId xid,
											 XLogRecPtr prepare_lsn, XLogRecPtr end_lsn,
											 TimestampTz prepare_time,
											 RepOriginId origin_id, XLogRecPtr origin_lsn);
extern void ReorderBufferSkipPrepare(ReorderBuffer *rb, TransactionId xid);
extern void ReorderBufferPrepare(ReorderBuffer *rb, TransactionId xid, char *gid);
extern ReorderBufferTXN *ReorderBufferGetOldestTXN(ReorderBuffer *);
extern TransactionId ReorderBufferGetOldestXmin(ReorderBuffer *rb);

extern void ReorderBufferSetRestartPoint(ReorderBuffer *, XLogRecPtr ptr);

extern void StartupReorderBuffer(void);

#endif