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decode.h File Reference
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Data Structures

struct  XLogRecordBuffer
 

Typedefs

typedef struct XLogRecordBuffer XLogRecordBuffer
 

Functions

void xlog_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void heap_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void heap2_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void xact_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void standby_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void logicalmsg_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void LogicalDecodingProcessRecord (LogicalDecodingContext *ctx, XLogReaderState *record)
 

Typedef Documentation

◆ XLogRecordBuffer

Function Documentation

◆ heap2_decode()

void heap2_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 378 of file decode.c.

379 {
380  uint8 info = XLogRecGetInfo(buf->record) & XLOG_HEAP_OPMASK;
381  TransactionId xid = XLogRecGetXid(buf->record);
382  SnapBuild *builder = ctx->snapshot_builder;
383 
384  ReorderBufferProcessXid(ctx->reorder, xid, buf->origptr);
385 
386  /*
387  * If we don't have snapshot or we are just fast-forwarding, there is no
388  * point in decoding changes.
389  */
391  ctx->fast_forward)
392  return;
393 
394  switch (info)
395  {
397  if (!ctx->fast_forward &&
398  SnapBuildProcessChange(builder, xid, buf->origptr))
399  DecodeMultiInsert(ctx, buf);
400  break;
401  case XLOG_HEAP2_NEW_CID:
402  {
403  xl_heap_new_cid *xlrec;
404 
405  xlrec = (xl_heap_new_cid *) XLogRecGetData(buf->record);
406  SnapBuildProcessNewCid(builder, xid, buf->origptr, xlrec);
407 
408  break;
409  }
410  case XLOG_HEAP2_REWRITE:
411 
412  /*
413  * Although these records only exist to serve the needs of logical
414  * decoding, all the work happens as part of crash or archive
415  * recovery, so we don't need to do anything here.
416  */
417  break;
418 
419  /*
420  * Everything else here is just low level physical stuff we're not
421  * interested in.
422  */
424  case XLOG_HEAP2_PRUNE:
425  case XLOG_HEAP2_VACUUM:
426  case XLOG_HEAP2_VISIBLE:
428  break;
429  default:
430  elog(ERROR, "unexpected RM_HEAP2_ID record type: %u", info);
431  }
432 }
unsigned char uint8
Definition: c.h:440
uint32 TransactionId
Definition: c.h:588
static void DecodeMultiInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:1059
#define ERROR
Definition: elog.h:39
#define XLOG_HEAP2_PRUNE
Definition: heapam_xlog.h:54
#define XLOG_HEAP2_MULTI_INSERT
Definition: heapam_xlog.h:58
#define XLOG_HEAP2_VACUUM
Definition: heapam_xlog.h:55
#define XLOG_HEAP2_REWRITE
Definition: heapam_xlog.h:53
#define XLOG_HEAP_OPMASK
Definition: heapam_xlog.h:41
#define XLOG_HEAP2_LOCK_UPDATED
Definition: heapam_xlog.h:59
#define XLOG_HEAP2_FREEZE_PAGE
Definition: heapam_xlog.h:56
#define XLOG_HEAP2_NEW_CID
Definition: heapam_xlog.h:60
#define XLOG_HEAP2_VISIBLE
Definition: heapam_xlog.h:57
static char * buf
Definition: pg_test_fsync.c:67
void ReorderBufferProcessXid(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn)
bool SnapBuildProcessChange(SnapBuild *builder, TransactionId xid, XLogRecPtr lsn)
Definition: snapbuild.c:764
SnapBuildState SnapBuildCurrentState(SnapBuild *builder)
Definition: snapbuild.c:402
void SnapBuildProcessNewCid(SnapBuild *builder, TransactionId xid, XLogRecPtr lsn, xl_heap_new_cid *xlrec)
Definition: snapbuild.c:814
@ SNAPBUILD_FULL_SNAPSHOT
Definition: snapbuild.h:39
struct SnapBuild * snapshot_builder
Definition: logical.h:44
struct ReorderBuffer * reorder
Definition: logical.h:43
#define XLogRecGetInfo(decoder)
Definition: xlogreader.h:411
#define XLogRecGetData(decoder)
Definition: xlogreader.h:416
#define XLogRecGetXid(decoder)
Definition: xlogreader.h:413

References buf, DecodeMultiInsert(), elog(), ERROR, LogicalDecodingContext::fast_forward, LogicalDecodingContext::reorder, ReorderBufferProcessXid(), SNAPBUILD_FULL_SNAPSHOT, SnapBuildCurrentState(), SnapBuildProcessChange(), SnapBuildProcessNewCid(), LogicalDecodingContext::snapshot_builder, XLOG_HEAP2_FREEZE_PAGE, XLOG_HEAP2_LOCK_UPDATED, XLOG_HEAP2_MULTI_INSERT, XLOG_HEAP2_NEW_CID, XLOG_HEAP2_PRUNE, XLOG_HEAP2_REWRITE, XLOG_HEAP2_VACUUM, XLOG_HEAP2_VISIBLE, XLOG_HEAP_OPMASK, XLogRecGetData, XLogRecGetInfo, and XLogRecGetXid.

◆ heap_decode()

void heap_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 438 of file decode.c.

439 {
440  uint8 info = XLogRecGetInfo(buf->record) & XLOG_HEAP_OPMASK;
441  TransactionId xid = XLogRecGetXid(buf->record);
442  SnapBuild *builder = ctx->snapshot_builder;
443 
444  ReorderBufferProcessXid(ctx->reorder, xid, buf->origptr);
445 
446  /*
447  * If we don't have snapshot or we are just fast-forwarding, there is no
448  * point in decoding data changes.
449  */
451  ctx->fast_forward)
452  return;
453 
454  switch (info)
455  {
456  case XLOG_HEAP_INSERT:
457  if (SnapBuildProcessChange(builder, xid, buf->origptr))
458  DecodeInsert(ctx, buf);
459  break;
460 
461  /*
462  * Treat HOT update as normal updates. There is no useful
463  * information in the fact that we could make it a HOT update
464  * locally and the WAL layout is compatible.
465  */
467  case XLOG_HEAP_UPDATE:
468  if (SnapBuildProcessChange(builder, xid, buf->origptr))
469  DecodeUpdate(ctx, buf);
470  break;
471 
472  case XLOG_HEAP_DELETE:
473  if (SnapBuildProcessChange(builder, xid, buf->origptr))
474  DecodeDelete(ctx, buf);
475  break;
476 
477  case XLOG_HEAP_TRUNCATE:
478  if (SnapBuildProcessChange(builder, xid, buf->origptr))
479  DecodeTruncate(ctx, buf);
480  break;
481 
482  case XLOG_HEAP_INPLACE:
483 
484  /*
485  * Inplace updates are only ever performed on catalog tuples and
486  * can, per definition, not change tuple visibility. Since we
487  * don't decode catalog tuples, we're not interested in the
488  * record's contents.
489  *
490  * In-place updates can be used either by XID-bearing transactions
491  * (e.g. in CREATE INDEX CONCURRENTLY) or by XID-less
492  * transactions (e.g. VACUUM). In the former case, the commit
493  * record will include cache invalidations, so we mark the
494  * transaction as catalog modifying here. Currently that's
495  * redundant because the commit will do that as well, but once we
496  * support decoding in-progress relations, this will be important.
497  */
498  if (!TransactionIdIsValid(xid))
499  break;
500 
501  (void) SnapBuildProcessChange(builder, xid, buf->origptr);
502  ReorderBufferXidSetCatalogChanges(ctx->reorder, xid, buf->origptr);
503  break;
504 
505  case XLOG_HEAP_CONFIRM:
506  if (SnapBuildProcessChange(builder, xid, buf->origptr))
507  DecodeSpecConfirm(ctx, buf);
508  break;
509 
510  case XLOG_HEAP_LOCK:
511  /* we don't care about row level locks for now */
512  break;
513 
514  default:
515  elog(ERROR, "unexpected RM_HEAP_ID record type: %u", info);
516  break;
517  }
518 }
static void DecodeDelete(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:967
static void DecodeInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:841
static void DecodeTruncate(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:1021
static void DecodeUpdate(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:900
static void DecodeSpecConfirm(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:1165
#define XLOG_HEAP_HOT_UPDATE
Definition: heapam_xlog.h:36
#define XLOG_HEAP_DELETE
Definition: heapam_xlog.h:33
#define XLOG_HEAP_TRUNCATE
Definition: heapam_xlog.h:35
#define XLOG_HEAP_UPDATE
Definition: heapam_xlog.h:34
#define XLOG_HEAP_INPLACE
Definition: heapam_xlog.h:39
#define XLOG_HEAP_LOCK
Definition: heapam_xlog.h:38
#define XLOG_HEAP_INSERT
Definition: heapam_xlog.h:32
#define XLOG_HEAP_CONFIRM
Definition: heapam_xlog.h:37
void ReorderBufferXidSetCatalogChanges(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn)
#define TransactionIdIsValid(xid)
Definition: transam.h:41

References buf, DecodeDelete(), DecodeInsert(), DecodeSpecConfirm(), DecodeTruncate(), DecodeUpdate(), elog(), ERROR, LogicalDecodingContext::fast_forward, LogicalDecodingContext::reorder, ReorderBufferProcessXid(), ReorderBufferXidSetCatalogChanges(), SNAPBUILD_FULL_SNAPSHOT, SnapBuildCurrentState(), SnapBuildProcessChange(), LogicalDecodingContext::snapshot_builder, TransactionIdIsValid, XLOG_HEAP_CONFIRM, XLOG_HEAP_DELETE, XLOG_HEAP_HOT_UPDATE, XLOG_HEAP_INPLACE, XLOG_HEAP_INSERT, XLOG_HEAP_LOCK, XLOG_HEAP_OPMASK, XLOG_HEAP_TRUNCATE, XLOG_HEAP_UPDATE, XLogRecGetInfo, and XLogRecGetXid.

◆ LogicalDecodingProcessRecord()

void LogicalDecodingProcessRecord ( LogicalDecodingContext ctx,
XLogReaderState record 
)

Definition at line 91 of file decode.c.

92 {
94  TransactionId txid;
95  RmgrData rmgr;
96 
97  buf.origptr = ctx->reader->ReadRecPtr;
98  buf.endptr = ctx->reader->EndRecPtr;
99  buf.record = record;
100 
101  txid = XLogRecGetTopXid(record);
102 
103  /*
104  * If the top-level xid is valid, we need to assign the subxact to the
105  * top-level xact. We need to do this for all records, hence we do it
106  * before the switch.
107  */
108  if (TransactionIdIsValid(txid))
109  {
111  txid,
112  XLogRecGetXid(record),
113  buf.origptr);
114  }
115 
116  rmgr = GetRmgr(XLogRecGetRmid(record));
117 
118  if (rmgr.rm_decode != NULL)
119  rmgr.rm_decode(ctx, &buf);
120  else
121  {
122  /* just deal with xid, and done */
124  buf.origptr);
125  }
126 }
void ReorderBufferAssignChild(ReorderBuffer *rb, TransactionId xid, TransactionId subxid, XLogRecPtr lsn)
XLogReaderState * reader
Definition: logical.h:42
void(* rm_decode)(struct LogicalDecodingContext *ctx, struct XLogRecordBuffer *buf)
XLogRecPtr EndRecPtr
Definition: xlogreader.h:207
XLogRecPtr ReadRecPtr
Definition: xlogreader.h:206
static RmgrData GetRmgr(RmgrId rmid)
#define XLogRecGetRmid(decoder)
Definition: xlogreader.h:412
#define XLogRecGetTopXid(decoder)
Definition: xlogreader.h:415

References buf, XLogReaderState::EndRecPtr, GetRmgr(), LogicalDecodingContext::reader, XLogReaderState::ReadRecPtr, LogicalDecodingContext::reorder, ReorderBufferAssignChild(), ReorderBufferProcessXid(), RmgrData::rm_decode, TransactionIdIsValid, XLogRecGetRmid, XLogRecGetTopXid, and XLogRecGetXid.

Referenced by DecodingContextFindStartpoint(), pg_logical_replication_slot_advance(), pg_logical_slot_get_changes_guts(), and XLogSendLogical().

◆ logicalmsg_decode()

void logicalmsg_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 560 of file decode.c.

561 {
562  SnapBuild *builder = ctx->snapshot_builder;
563  XLogReaderState *r = buf->record;
564  TransactionId xid = XLogRecGetXid(r);
565  uint8 info = XLogRecGetInfo(r) & ~XLR_INFO_MASK;
566  RepOriginId origin_id = XLogRecGetOrigin(r);
567  Snapshot snapshot;
568  xl_logical_message *message;
569 
570  if (info != XLOG_LOGICAL_MESSAGE)
571  elog(ERROR, "unexpected RM_LOGICALMSG_ID record type: %u", info);
572 
573  ReorderBufferProcessXid(ctx->reorder, XLogRecGetXid(r), buf->origptr);
574 
575  /*
576  * If we don't have snapshot or we are just fast-forwarding, there is no
577  * point in decoding messages.
578  */
580  ctx->fast_forward)
581  return;
582 
583  message = (xl_logical_message *) XLogRecGetData(r);
584 
585  if (message->dbId != ctx->slot->data.database ||
586  FilterByOrigin(ctx, origin_id))
587  return;
588 
589  if (message->transactional &&
590  !SnapBuildProcessChange(builder, xid, buf->origptr))
591  return;
592  else if (!message->transactional &&
594  SnapBuildXactNeedsSkip(builder, buf->origptr)))
595  return;
596 
597  snapshot = SnapBuildGetOrBuildSnapshot(builder);
598  ReorderBufferQueueMessage(ctx->reorder, xid, snapshot, buf->endptr,
599  message->transactional,
600  message->message, /* first part of message is
601  * prefix */
602  message->message_size,
603  message->message + message->prefix_size);
604 }
static bool FilterByOrigin(LogicalDecodingContext *ctx, RepOriginId origin_id)
Definition: decode.c:548
#define XLOG_LOGICAL_MESSAGE
Definition: message.h:36
void ReorderBufferQueueMessage(ReorderBuffer *rb, TransactionId xid, Snapshot snap, XLogRecPtr lsn, bool transactional, const char *prefix, Size message_size, const char *message)
bool SnapBuildXactNeedsSkip(SnapBuild *builder, XLogRecPtr ptr)
Definition: snapbuild.c:429
Snapshot SnapBuildGetOrBuildSnapshot(SnapBuild *builder)
Definition: snapbuild.c:704
@ SNAPBUILD_CONSISTENT
Definition: snapbuild.h:46
ReplicationSlot * slot
Definition: logical.h:39
ReplicationSlotPersistentData data
Definition: slot.h:147
bool transactional
Definition: message.h:23
char message[FLEXIBLE_ARRAY_MEMBER]
Definition: message.h:27
uint16 RepOriginId
Definition: xlogdefs.h:65
#define XLogRecGetOrigin(decoder)
Definition: xlogreader.h:414
#define XLR_INFO_MASK
Definition: xlogrecord.h:62

References buf, ReplicationSlot::data, ReplicationSlotPersistentData::database, xl_logical_message::dbId, elog(), ERROR, LogicalDecodingContext::fast_forward, FilterByOrigin(), xl_logical_message::message, xl_logical_message::message_size, xl_logical_message::prefix_size, LogicalDecodingContext::reorder, ReorderBufferProcessXid(), ReorderBufferQueueMessage(), LogicalDecodingContext::slot, SNAPBUILD_CONSISTENT, SNAPBUILD_FULL_SNAPSHOT, SnapBuildCurrentState(), SnapBuildGetOrBuildSnapshot(), SnapBuildProcessChange(), SnapBuildXactNeedsSkip(), LogicalDecodingContext::snapshot_builder, xl_logical_message::transactional, XLOG_LOGICAL_MESSAGE, XLogRecGetData, XLogRecGetInfo, XLogRecGetOrigin, XLogRecGetXid, and XLR_INFO_MASK.

◆ standby_decode()

void standby_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 332 of file decode.c.

333 {
334  SnapBuild *builder = ctx->snapshot_builder;
335  XLogReaderState *r = buf->record;
336  uint8 info = XLogRecGetInfo(r) & ~XLR_INFO_MASK;
337 
338  ReorderBufferProcessXid(ctx->reorder, XLogRecGetXid(r), buf->origptr);
339 
340  switch (info)
341  {
342  case XLOG_RUNNING_XACTS:
343  {
345 
346  SnapBuildProcessRunningXacts(builder, buf->origptr, running);
347 
348  /*
349  * Abort all transactions that we keep track of, that are
350  * older than the record's oldestRunningXid. This is the most
351  * convenient spot for doing so since, in contrast to shutdown
352  * or end-of-recovery checkpoints, we have information about
353  * all running transactions which includes prepared ones,
354  * while shutdown checkpoints just know that no non-prepared
355  * transactions are in progress.
356  */
358  }
359  break;
360  case XLOG_STANDBY_LOCK:
361  break;
362  case XLOG_INVALIDATIONS:
363 
364  /*
365  * We are processing the invalidations at the command level via
366  * XLOG_XACT_INVALIDATIONS. So we don't need to do anything here.
367  */
368  break;
369  default:
370  elog(ERROR, "unexpected RM_STANDBY_ID record type: %u", info);
371  }
372 }
void ReorderBufferAbortOld(ReorderBuffer *rb, TransactionId oldestRunningXid)
void SnapBuildProcessRunningXacts(SnapBuild *builder, XLogRecPtr lsn, xl_running_xacts *running)
Definition: snapbuild.c:1213
#define XLOG_INVALIDATIONS
Definition: standbydefs.h:36
#define XLOG_STANDBY_LOCK
Definition: standbydefs.h:34
#define XLOG_RUNNING_XACTS
Definition: standbydefs.h:35
TransactionId oldestRunningXid
Definition: standbydefs.h:53

References buf, elog(), ERROR, xl_running_xacts::oldestRunningXid, LogicalDecodingContext::reorder, ReorderBufferAbortOld(), ReorderBufferProcessXid(), SnapBuildProcessRunningXacts(), LogicalDecodingContext::snapshot_builder, XLOG_INVALIDATIONS, XLOG_RUNNING_XACTS, XLOG_STANDBY_LOCK, XLogRecGetData, XLogRecGetInfo, XLogRecGetXid, and XLR_INFO_MASK.

◆ xact_decode()

void xact_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 175 of file decode.c.

176 {
177  SnapBuild *builder = ctx->snapshot_builder;
178  ReorderBuffer *reorder = ctx->reorder;
179  XLogReaderState *r = buf->record;
181 
182  /*
183  * If the snapshot isn't yet fully built, we cannot decode anything, so
184  * bail out.
185  */
187  return;
188 
189  switch (info)
190  {
191  case XLOG_XACT_COMMIT:
193  {
194  xl_xact_commit *xlrec;
195  xl_xact_parsed_commit parsed;
196  TransactionId xid;
197  bool two_phase = false;
198 
199  xlrec = (xl_xact_commit *) XLogRecGetData(r);
200  ParseCommitRecord(XLogRecGetInfo(buf->record), xlrec, &parsed);
201 
202  if (!TransactionIdIsValid(parsed.twophase_xid))
203  xid = XLogRecGetXid(r);
204  else
205  xid = parsed.twophase_xid;
206 
207  /*
208  * We would like to process the transaction in a two-phase
209  * manner iff output plugin supports two-phase commits and
210  * doesn't filter the transaction at prepare time.
211  */
212  if (info == XLOG_XACT_COMMIT_PREPARED)
213  two_phase = !(FilterPrepare(ctx, xid,
214  parsed.twophase_gid));
215 
216  DecodeCommit(ctx, buf, &parsed, xid, two_phase);
217  break;
218  }
219  case XLOG_XACT_ABORT:
221  {
222  xl_xact_abort *xlrec;
223  xl_xact_parsed_abort parsed;
224  TransactionId xid;
225  bool two_phase = false;
226 
227  xlrec = (xl_xact_abort *) XLogRecGetData(r);
228  ParseAbortRecord(XLogRecGetInfo(buf->record), xlrec, &parsed);
229 
230  if (!TransactionIdIsValid(parsed.twophase_xid))
231  xid = XLogRecGetXid(r);
232  else
233  xid = parsed.twophase_xid;
234 
235  /*
236  * We would like to process the transaction in a two-phase
237  * manner iff output plugin supports two-phase commits and
238  * doesn't filter the transaction at prepare time.
239  */
240  if (info == XLOG_XACT_ABORT_PREPARED)
241  two_phase = !(FilterPrepare(ctx, xid,
242  parsed.twophase_gid));
243 
244  DecodeAbort(ctx, buf, &parsed, xid, two_phase);
245  break;
246  }
248 
249  /*
250  * We assign subxact to the toplevel xact while processing each
251  * record if required. So, we don't need to do anything here. See
252  * LogicalDecodingProcessRecord.
253  */
254  break;
256  {
257  TransactionId xid;
258  xl_xact_invals *invals;
259 
260  xid = XLogRecGetXid(r);
261  invals = (xl_xact_invals *) XLogRecGetData(r);
262 
263  /*
264  * Execute the invalidations for xid-less transactions,
265  * otherwise, accumulate them so that they can be processed at
266  * the commit time.
267  */
268  if (TransactionIdIsValid(xid))
269  {
270  if (!ctx->fast_forward)
271  ReorderBufferAddInvalidations(reorder, xid,
272  buf->origptr,
273  invals->nmsgs,
274  invals->msgs);
276  buf->origptr);
277  }
278  else if ((!ctx->fast_forward))
280  invals->nmsgs,
281  invals->msgs);
282  }
283  break;
284  case XLOG_XACT_PREPARE:
285  {
286  xl_xact_parsed_prepare parsed;
287  xl_xact_prepare *xlrec;
288 
289  /* ok, parse it */
290  xlrec = (xl_xact_prepare *) XLogRecGetData(r);
292  xlrec, &parsed);
293 
294  /*
295  * We would like to process the transaction in a two-phase
296  * manner iff output plugin supports two-phase commits and
297  * doesn't filter the transaction at prepare time.
298  */
299  if (FilterPrepare(ctx, parsed.twophase_xid,
300  parsed.twophase_gid))
301  {
302  ReorderBufferProcessXid(reorder, parsed.twophase_xid,
303  buf->origptr);
304  break;
305  }
306 
307  /*
308  * Note that if the prepared transaction has locked [user]
309  * catalog tables exclusively then decoding prepare can block
310  * till the main transaction is committed because it needs to
311  * lock the catalog tables.
312  *
313  * XXX Now, this can even lead to a deadlock if the prepare
314  * transaction is waiting to get it logically replicated for
315  * distributed 2PC. This can be avoided by disallowing
316  * preparing transactions that have locked [user] catalog
317  * tables exclusively but as of now, we ask users not to do
318  * such an operation.
319  */
320  DecodePrepare(ctx, buf, &parsed);
321  break;
322  }
323  default:
324  elog(ERROR, "unexpected RM_XACT_ID record type: %u", info);
325  }
326 }
static void DecodeAbort(LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_abort *parsed, TransactionId xid, bool two_phase)
Definition: decode.c:786
static bool FilterPrepare(LogicalDecodingContext *ctx, TransactionId xid, const char *gid)
Definition: decode.c:525
static void DecodeCommit(LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_commit *parsed, TransactionId xid, bool two_phase)
Definition: decode.c:615
static void DecodePrepare(LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_prepare *parsed)
Definition: decode.c:711
static bool two_phase
void ReorderBufferAddInvalidations(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn, Size nmsgs, SharedInvalidationMessage *msgs)
void ReorderBufferImmediateInvalidation(ReorderBuffer *rb, uint32 ninvalidations, SharedInvalidationMessage *invalidations)
SharedInvalidationMessage msgs[FLEXIBLE_ARRAY_MEMBER]
Definition: xact.h:292
int nmsgs
Definition: xact.h:291
TransactionId twophase_xid
Definition: xact.h:414
char twophase_gid[GIDSIZE]
Definition: xact.h:415
TransactionId twophase_xid
Definition: xact.h:384
char twophase_gid[GIDSIZE]
Definition: xact.h:385
#define XLOG_XACT_COMMIT_PREPARED
Definition: xact.h:165
#define XLOG_XACT_INVALIDATIONS
Definition: xact.h:168
#define XLOG_XACT_PREPARE
Definition: xact.h:163
#define XLOG_XACT_COMMIT
Definition: xact.h:162
#define XLOG_XACT_OPMASK
Definition: xact.h:172
#define XLOG_XACT_ABORT
Definition: xact.h:164
#define XLOG_XACT_ASSIGNMENT
Definition: xact.h:167
#define XLOG_XACT_ABORT_PREPARED
Definition: xact.h:166
void ParseCommitRecord(uint8 info, xl_xact_commit *xlrec, xl_xact_parsed_commit *parsed)
Definition: xactdesc.c:35
void ParseAbortRecord(uint8 info, xl_xact_abort *xlrec, xl_xact_parsed_abort *parsed)
Definition: xactdesc.c:141
void ParsePrepareRecord(uint8 info, xl_xact_prepare *xlrec, xl_xact_parsed_prepare *parsed)
Definition: xactdesc.c:239

References buf, DecodeAbort(), DecodeCommit(), DecodePrepare(), elog(), ERROR, LogicalDecodingContext::fast_forward, FilterPrepare(), xl_xact_invals::msgs, xl_xact_invals::nmsgs, ParseAbortRecord(), ParseCommitRecord(), ParsePrepareRecord(), LogicalDecodingContext::reorder, ReorderBufferAddInvalidations(), ReorderBufferImmediateInvalidation(), ReorderBufferProcessXid(), ReorderBufferXidSetCatalogChanges(), SNAPBUILD_FULL_SNAPSHOT, SnapBuildCurrentState(), LogicalDecodingContext::snapshot_builder, TransactionIdIsValid, two_phase, xl_xact_parsed_commit::twophase_gid, xl_xact_parsed_abort::twophase_gid, xl_xact_parsed_commit::twophase_xid, xl_xact_parsed_abort::twophase_xid, XLOG_XACT_ABORT, XLOG_XACT_ABORT_PREPARED, XLOG_XACT_ASSIGNMENT, XLOG_XACT_COMMIT, XLOG_XACT_COMMIT_PREPARED, XLOG_XACT_INVALIDATIONS, XLOG_XACT_OPMASK, XLOG_XACT_PREPARE, XLogRecGetData, XLogRecGetInfo, and XLogRecGetXid.

◆ xlog_decode()

void xlog_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 132 of file decode.c.

133 {
134  SnapBuild *builder = ctx->snapshot_builder;
135  uint8 info = XLogRecGetInfo(buf->record) & ~XLR_INFO_MASK;
136 
138  buf->origptr);
139 
140  switch (info)
141  {
142  /* this is also used in END_OF_RECOVERY checkpoints */
145  SnapBuildSerializationPoint(builder, buf->origptr);
146 
147  break;
149 
150  /*
151  * a RUNNING_XACTS record will have been logged near to this, we
152  * can restart from there.
153  */
154  break;
155  case XLOG_NOOP:
156  case XLOG_NEXTOID:
157  case XLOG_SWITCH:
158  case XLOG_BACKUP_END:
160  case XLOG_RESTORE_POINT:
161  case XLOG_FPW_CHANGE:
162  case XLOG_FPI_FOR_HINT:
163  case XLOG_FPI:
165  break;
166  default:
167  elog(ERROR, "unexpected RM_XLOG_ID record type: %u", info);
168  }
169 }
#define XLOG_RESTORE_POINT
Definition: pg_control.h:74
#define XLOG_FPW_CHANGE
Definition: pg_control.h:75
#define XLOG_OVERWRITE_CONTRECORD
Definition: pg_control.h:80
#define XLOG_FPI
Definition: pg_control.h:78
#define XLOG_FPI_FOR_HINT
Definition: pg_control.h:77
#define XLOG_NEXTOID
Definition: pg_control.h:70
#define XLOG_NOOP
Definition: pg_control.h:69
#define XLOG_CHECKPOINT_SHUTDOWN
Definition: pg_control.h:67
#define XLOG_SWITCH
Definition: pg_control.h:71
#define XLOG_BACKUP_END
Definition: pg_control.h:72
#define XLOG_PARAMETER_CHANGE
Definition: pg_control.h:73
#define XLOG_CHECKPOINT_ONLINE
Definition: pg_control.h:68
#define XLOG_END_OF_RECOVERY
Definition: pg_control.h:76
void SnapBuildSerializationPoint(SnapBuild *builder, XLogRecPtr lsn)
Definition: snapbuild.c:1588

References buf, elog(), ERROR, LogicalDecodingContext::reorder, ReorderBufferProcessXid(), SnapBuildSerializationPoint(), LogicalDecodingContext::snapshot_builder, XLOG_BACKUP_END, XLOG_CHECKPOINT_ONLINE, XLOG_CHECKPOINT_SHUTDOWN, XLOG_END_OF_RECOVERY, XLOG_FPI, XLOG_FPI_FOR_HINT, XLOG_FPW_CHANGE, XLOG_NEXTOID, XLOG_NOOP, XLOG_OVERWRITE_CONTRECORD, XLOG_PARAMETER_CHANGE, XLOG_RESTORE_POINT, XLOG_SWITCH, XLogRecGetInfo, XLogRecGetXid, and XLR_INFO_MASK.