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decode.c File Reference
Include dependency graph for decode.c:

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Functions

static void DecodeInsert (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
static void DecodeUpdate (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
static void DecodeDelete (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
static void DecodeTruncate (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
static void DecodeMultiInsert (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
static void DecodeSpecConfirm (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
static void DecodeCommit (LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_commit *parsed, TransactionId xid, bool two_phase)
 
static void DecodeAbort (LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_abort *parsed, TransactionId xid, bool two_phase)
 
static void DecodePrepare (LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_prepare *parsed)
 
static void DecodeXLogTuple (char *data, Size len, HeapTuple tuple)
 
static bool FilterPrepare (LogicalDecodingContext *ctx, TransactionId xid, const char *gid)
 
static bool DecodeTXNNeedSkip (LogicalDecodingContext *ctx, XLogRecordBuffer *buf, Oid txn_dbid, RepOriginId origin_id)
 
void LogicalDecodingProcessRecord (LogicalDecodingContext *ctx, XLogReaderState *record)
 
void xlog_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void xact_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void standby_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void heap2_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
void heap_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 
static bool FilterByOrigin (LogicalDecodingContext *ctx, RepOriginId origin_id)
 
void logicalmsg_decode (LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
 

Function Documentation

◆ DecodeAbort()

static void DecodeAbort ( LogicalDecodingContext ctx,
XLogRecordBuffer buf,
xl_xact_parsed_abort parsed,
TransactionId  xid,
bool  two_phase 
)
static

Definition at line 834 of file decode.c.

837 {
838  int i;
839  XLogRecPtr origin_lsn = InvalidXLogRecPtr;
840  TimestampTz abort_time = parsed->xact_time;
841  RepOriginId origin_id = XLogRecGetOrigin(buf->record);
842  bool skip_xact;
843 
844  if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
845  {
846  origin_lsn = parsed->origin_lsn;
847  abort_time = parsed->origin_timestamp;
848  }
849 
850  /*
851  * Check whether we need to process this transaction. See
852  * DecodeTXNNeedSkip for the reasons why we sometimes want to skip the
853  * transaction.
854  */
855  skip_xact = DecodeTXNNeedSkip(ctx, buf, parsed->dbId, origin_id);
856 
857  /*
858  * Send the final rollback record for a prepared transaction unless we
859  * need to skip it. For non-two-phase xacts, simply forget the xact.
860  */
861  if (two_phase && !skip_xact)
862  {
863  ReorderBufferFinishPrepared(ctx->reorder, xid, buf->origptr, buf->endptr,
865  abort_time, origin_id, origin_lsn,
866  parsed->twophase_gid, false);
867  }
868  else
869  {
870  for (i = 0; i < parsed->nsubxacts; i++)
871  {
872  ReorderBufferAbort(ctx->reorder, parsed->subxacts[i],
873  buf->record->EndRecPtr, abort_time);
874  }
875 
876  ReorderBufferAbort(ctx->reorder, xid, buf->record->EndRecPtr,
877  abort_time);
878  }
879 
880  /* update the decoding stats */
881  UpdateDecodingStats(ctx);
882 }
int64 TimestampTz
Definition: timestamp.h:39
static bool DecodeTXNNeedSkip(LogicalDecodingContext *ctx, XLogRecordBuffer *buf, Oid txn_dbid, RepOriginId origin_id)
Definition: decode.c:1296
int i
Definition: isn.c:72
void UpdateDecodingStats(LogicalDecodingContext *ctx)
Definition: logical.c:1934
static bool two_phase
static char * buf
Definition: pg_test_fsync.c:72
void ReorderBufferAbort(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn, TimestampTz abort_time)
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)
struct ReorderBuffer * reorder
Definition: logical.h:43
TimestampTz xact_time
Definition: xact.h:412
TransactionId * subxacts
Definition: xact.h:419
XLogRecPtr origin_lsn
Definition: xact.h:430
char twophase_gid[GIDSIZE]
Definition: xact.h:428
TimestampTz origin_timestamp
Definition: xact.h:431
#define XACT_XINFO_HAS_ORIGIN
Definition: xact.h:193
uint16 RepOriginId
Definition: xlogdefs.h:65
uint64 XLogRecPtr
Definition: xlogdefs.h:21
#define InvalidXLogRecPtr
Definition: xlogdefs.h:28
#define XLogRecGetOrigin(decoder)
Definition: xlogreader.h:413

References buf, xl_xact_parsed_abort::dbId, DecodeTXNNeedSkip(), i, InvalidXLogRecPtr, xl_xact_parsed_abort::nsubxacts, xl_xact_parsed_abort::origin_lsn, xl_xact_parsed_abort::origin_timestamp, LogicalDecodingContext::reorder, ReorderBufferAbort(), ReorderBufferFinishPrepared(), xl_xact_parsed_abort::subxacts, two_phase, xl_xact_parsed_abort::twophase_gid, UpdateDecodingStats(), xl_xact_parsed_abort::xact_time, XACT_XINFO_HAS_ORIGIN, xl_xact_parsed_abort::xinfo, and XLogRecGetOrigin.

Referenced by xact_decode().

◆ DecodeCommit()

static void DecodeCommit ( LogicalDecodingContext ctx,
XLogRecordBuffer buf,
xl_xact_parsed_commit parsed,
TransactionId  xid,
bool  two_phase 
)
static

Definition at line 663 of file decode.c.

666 {
667  XLogRecPtr origin_lsn = InvalidXLogRecPtr;
668  TimestampTz commit_time = parsed->xact_time;
669  RepOriginId origin_id = XLogRecGetOrigin(buf->record);
670  int i;
671 
672  if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
673  {
674  origin_lsn = parsed->origin_lsn;
675  commit_time = parsed->origin_timestamp;
676  }
677 
678  SnapBuildCommitTxn(ctx->snapshot_builder, buf->origptr, xid,
679  parsed->nsubxacts, parsed->subxacts,
680  parsed->xinfo);
681 
682  /* ----
683  * Check whether we are interested in this specific transaction, and tell
684  * the reorderbuffer to forget the content of the (sub-)transactions
685  * if not.
686  *
687  * We can't just use ReorderBufferAbort() here, because we need to execute
688  * the transaction's invalidations. This currently won't be needed if
689  * we're just skipping over the transaction because currently we only do
690  * so during startup, to get to the first transaction the client needs. As
691  * we have reset the catalog caches before starting to read WAL, and we
692  * haven't yet touched any catalogs, there can't be anything to invalidate.
693  * But if we're "forgetting" this commit because it happened in another
694  * database, the invalidations might be important, because they could be
695  * for shared catalogs and we might have loaded data into the relevant
696  * syscaches.
697  * ---
698  */
699  if (DecodeTXNNeedSkip(ctx, buf, parsed->dbId, origin_id))
700  {
701  for (i = 0; i < parsed->nsubxacts; i++)
702  {
703  ReorderBufferForget(ctx->reorder, parsed->subxacts[i], buf->origptr);
704  }
705  ReorderBufferForget(ctx->reorder, xid, buf->origptr);
706 
707  return;
708  }
709 
710  /* tell the reorderbuffer about the surviving subtransactions */
711  for (i = 0; i < parsed->nsubxacts; i++)
712  {
713  ReorderBufferCommitChild(ctx->reorder, xid, parsed->subxacts[i],
714  buf->origptr, buf->endptr);
715  }
716 
717  /*
718  * Send the final commit record if the transaction data is already
719  * decoded, otherwise, process the entire transaction.
720  */
721  if (two_phase)
722  {
723  ReorderBufferFinishPrepared(ctx->reorder, xid, buf->origptr, buf->endptr,
725  commit_time, origin_id, origin_lsn,
726  parsed->twophase_gid, true);
727  }
728  else
729  {
730  ReorderBufferCommit(ctx->reorder, xid, buf->origptr, buf->endptr,
731  commit_time, origin_id, origin_lsn);
732  }
733 
734  /*
735  * Update the decoding stats at transaction prepare/commit/abort.
736  * Additionally we send the stats when we spill or stream the changes to
737  * avoid losing them in case the decoding is interrupted. It is not clear
738  * that sending more or less frequently than this would be better.
739  */
740  UpdateDecodingStats(ctx);
741 }
void ReorderBufferForget(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn)
void ReorderBufferCommitChild(ReorderBuffer *rb, TransactionId xid, TransactionId subxid, XLogRecPtr commit_lsn, XLogRecPtr end_lsn)
void ReorderBufferCommit(ReorderBuffer *rb, TransactionId xid, XLogRecPtr commit_lsn, XLogRecPtr end_lsn, TimestampTz commit_time, RepOriginId origin_id, XLogRecPtr origin_lsn)
XLogRecPtr SnapBuildGetTwoPhaseAt(SnapBuild *builder)
Definition: snapbuild.c:286
void SnapBuildCommitTxn(SnapBuild *builder, XLogRecPtr lsn, TransactionId xid, int nsubxacts, TransactionId *subxacts, uint32 xinfo)
Definition: snapbuild.c:895
struct SnapBuild * snapshot_builder
Definition: logical.h:44
TimestampTz xact_time
Definition: xact.h:379
TimestampTz origin_timestamp
Definition: xact.h:405
TransactionId * subxacts
Definition: xact.h:386
char twophase_gid[GIDSIZE]
Definition: xact.h:398
XLogRecPtr origin_lsn
Definition: xact.h:404

References buf, xl_xact_parsed_commit::dbId, DecodeTXNNeedSkip(), i, InvalidXLogRecPtr, xl_xact_parsed_commit::nsubxacts, xl_xact_parsed_commit::origin_lsn, xl_xact_parsed_commit::origin_timestamp, LogicalDecodingContext::reorder, ReorderBufferCommit(), ReorderBufferCommitChild(), ReorderBufferFinishPrepared(), ReorderBufferForget(), SnapBuildCommitTxn(), SnapBuildGetTwoPhaseAt(), LogicalDecodingContext::snapshot_builder, xl_xact_parsed_commit::subxacts, two_phase, xl_xact_parsed_commit::twophase_gid, UpdateDecodingStats(), xl_xact_parsed_commit::xact_time, XACT_XINFO_HAS_ORIGIN, xl_xact_parsed_commit::xinfo, and XLogRecGetOrigin.

Referenced by xact_decode().

◆ DecodeDelete()

static void DecodeDelete ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)
static

Definition at line 1016 of file decode.c.

1017 {
1018  XLogReaderState *r = buf->record;
1019  xl_heap_delete *xlrec;
1020  ReorderBufferChange *change;
1021  RelFileLocator target_locator;
1022 
1023  xlrec = (xl_heap_delete *) XLogRecGetData(r);
1024 
1025  /* only interested in our database */
1026  XLogRecGetBlockTag(r, 0, &target_locator, NULL, NULL);
1027  if (target_locator.dbOid != ctx->slot->data.database)
1028  return;
1029 
1030  /* output plugin doesn't look for this origin, no need to queue */
1031  if (FilterByOrigin(ctx, XLogRecGetOrigin(r)))
1032  return;
1033 
1034  change = ReorderBufferGetChange(ctx->reorder);
1035 
1036  if (xlrec->flags & XLH_DELETE_IS_SUPER)
1038  else
1040 
1041  change->origin_id = XLogRecGetOrigin(r);
1042 
1043  memcpy(&change->data.tp.rlocator, &target_locator, sizeof(RelFileLocator));
1044 
1045  /* old primary key stored */
1046  if (xlrec->flags & XLH_DELETE_CONTAINS_OLD)
1047  {
1048  Size datalen = XLogRecGetDataLen(r) - SizeOfHeapDelete;
1049  Size tuplelen = datalen - SizeOfHeapHeader;
1050 
1052 
1053  change->data.tp.oldtuple =
1054  ReorderBufferGetTupleBuf(ctx->reorder, tuplelen);
1055 
1056  DecodeXLogTuple((char *) xlrec + SizeOfHeapDelete,
1057  datalen, change->data.tp.oldtuple);
1058  }
1059 
1060  change->data.tp.clear_toast_afterwards = true;
1061 
1063  change, false);
1064 }
#define Assert(condition)
Definition: c.h:863
size_t Size
Definition: c.h:610
static void DecodeXLogTuple(char *data, Size len, HeapTuple tuple)
Definition: decode.c:1250
static bool FilterByOrigin(LogicalDecodingContext *ctx, RepOriginId origin_id)
Definition: decode.c:570
#define XLH_DELETE_CONTAINS_OLD
Definition: heapam_xlog.h:109
#define SizeOfHeapHeader
Definition: heapam_xlog.h:157
#define SizeOfHeapDelete
Definition: heapam_xlog.h:121
#define XLH_DELETE_IS_SUPER
Definition: heapam_xlog.h:105
HeapTuple ReorderBufferGetTupleBuf(ReorderBuffer *rb, Size tuple_len)
void ReorderBufferQueueChange(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn, ReorderBufferChange *change, bool toast_insert)
ReorderBufferChange * ReorderBufferGetChange(ReorderBuffer *rb)
@ REORDER_BUFFER_CHANGE_INTERNAL_SPEC_ABORT
Definition: reorderbuffer.h:62
@ REORDER_BUFFER_CHANGE_DELETE
Definition: reorderbuffer.h:54
ReplicationSlot * slot
Definition: logical.h:39
ReorderBufferChangeType action
Definition: reorderbuffer.h:81
union ReorderBufferChange::@108 data
RepOriginId origin_id
Definition: reorderbuffer.h:86
struct ReorderBufferChange::@108::@109 tp
ReplicationSlotPersistentData data
Definition: slot.h:181
void XLogRecGetBlockTag(XLogReaderState *record, uint8 block_id, RelFileLocator *rlocator, ForkNumber *forknum, BlockNumber *blknum)
Definition: xlogreader.c:1971
#define XLogRecGetDataLen(decoder)
Definition: xlogreader.h:416
#define XLogRecGetData(decoder)
Definition: xlogreader.h:415
#define XLogRecGetXid(decoder)
Definition: xlogreader.h:412

References ReorderBufferChange::action, Assert, buf, ReorderBufferChange::data, ReplicationSlot::data, ReplicationSlotPersistentData::database, RelFileLocator::dbOid, DecodeXLogTuple(), FilterByOrigin(), xl_heap_delete::flags, ReorderBufferChange::origin_id, LogicalDecodingContext::reorder, REORDER_BUFFER_CHANGE_DELETE, REORDER_BUFFER_CHANGE_INTERNAL_SPEC_ABORT, ReorderBufferGetChange(), ReorderBufferGetTupleBuf(), ReorderBufferQueueChange(), SizeOfHeapDelete, SizeOfHeapHeader, LogicalDecodingContext::slot, ReorderBufferChange::tp, XLH_DELETE_CONTAINS_OLD, XLH_DELETE_IS_SUPER, XLogRecGetBlockTag(), XLogRecGetData, XLogRecGetDataLen, XLogRecGetOrigin, and XLogRecGetXid.

Referenced by heap_decode().

◆ DecodeInsert()

static void DecodeInsert ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)
static

Definition at line 890 of file decode.c.

891 {
892  Size datalen;
893  char *tupledata;
894  Size tuplelen;
895  XLogReaderState *r = buf->record;
896  xl_heap_insert *xlrec;
897  ReorderBufferChange *change;
898  RelFileLocator target_locator;
899 
900  xlrec = (xl_heap_insert *) XLogRecGetData(r);
901 
902  /*
903  * Ignore insert records without new tuples (this does happen when
904  * raw_heap_insert marks the TOAST record as HEAP_INSERT_NO_LOGICAL).
905  */
906  if (!(xlrec->flags & XLH_INSERT_CONTAINS_NEW_TUPLE))
907  return;
908 
909  /* only interested in our database */
910  XLogRecGetBlockTag(r, 0, &target_locator, NULL, NULL);
911  if (target_locator.dbOid != ctx->slot->data.database)
912  return;
913 
914  /* output plugin doesn't look for this origin, no need to queue */
915  if (FilterByOrigin(ctx, XLogRecGetOrigin(r)))
916  return;
917 
918  change = ReorderBufferGetChange(ctx->reorder);
919  if (!(xlrec->flags & XLH_INSERT_IS_SPECULATIVE))
921  else
923  change->origin_id = XLogRecGetOrigin(r);
924 
925  memcpy(&change->data.tp.rlocator, &target_locator, sizeof(RelFileLocator));
926 
927  tupledata = XLogRecGetBlockData(r, 0, &datalen);
928  tuplelen = datalen - SizeOfHeapHeader;
929 
930  change->data.tp.newtuple =
931  ReorderBufferGetTupleBuf(ctx->reorder, tuplelen);
932 
933  DecodeXLogTuple(tupledata, datalen, change->data.tp.newtuple);
934 
935  change->data.tp.clear_toast_afterwards = true;
936 
938  change,
940 }
#define XLH_INSERT_ON_TOAST_RELATION
Definition: heapam_xlog.h:76
#define XLH_INSERT_IS_SPECULATIVE
Definition: heapam_xlog.h:74
#define XLH_INSERT_CONTAINS_NEW_TUPLE
Definition: heapam_xlog.h:75
@ REORDER_BUFFER_CHANGE_INSERT
Definition: reorderbuffer.h:52
@ REORDER_BUFFER_CHANGE_INTERNAL_SPEC_INSERT
Definition: reorderbuffer.h:60
char * XLogRecGetBlockData(XLogReaderState *record, uint8 block_id, Size *len)
Definition: xlogreader.c:2025

References ReorderBufferChange::action, buf, ReorderBufferChange::data, ReplicationSlot::data, ReplicationSlotPersistentData::database, RelFileLocator::dbOid, DecodeXLogTuple(), FilterByOrigin(), xl_heap_insert::flags, ReorderBufferChange::origin_id, LogicalDecodingContext::reorder, REORDER_BUFFER_CHANGE_INSERT, REORDER_BUFFER_CHANGE_INTERNAL_SPEC_INSERT, ReorderBufferGetChange(), ReorderBufferGetTupleBuf(), ReorderBufferQueueChange(), SizeOfHeapHeader, LogicalDecodingContext::slot, ReorderBufferChange::tp, XLH_INSERT_CONTAINS_NEW_TUPLE, XLH_INSERT_IS_SPECULATIVE, XLH_INSERT_ON_TOAST_RELATION, XLogRecGetBlockData(), XLogRecGetBlockTag(), XLogRecGetData, XLogRecGetOrigin, and XLogRecGetXid.

Referenced by heap_decode().

◆ DecodeMultiInsert()

static void DecodeMultiInsert ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)
static

Definition at line 1108 of file decode.c.

1109 {
1110  XLogReaderState *r = buf->record;
1111  xl_heap_multi_insert *xlrec;
1112  int i;
1113  char *data;
1114  char *tupledata;
1115  Size tuplelen;
1116  RelFileLocator rlocator;
1117 
1118  xlrec = (xl_heap_multi_insert *) XLogRecGetData(r);
1119 
1120  /*
1121  * Ignore insert records without new tuples. This happens when a
1122  * multi_insert is done on a catalog or on a non-persistent relation.
1123  */
1124  if (!(xlrec->flags & XLH_INSERT_CONTAINS_NEW_TUPLE))
1125  return;
1126 
1127  /* only interested in our database */
1128  XLogRecGetBlockTag(r, 0, &rlocator, NULL, NULL);
1129  if (rlocator.dbOid != ctx->slot->data.database)
1130  return;
1131 
1132  /* output plugin doesn't look for this origin, no need to queue */
1133  if (FilterByOrigin(ctx, XLogRecGetOrigin(r)))
1134  return;
1135 
1136  /*
1137  * We know that this multi_insert isn't for a catalog, so the block should
1138  * always have data even if a full-page write of it is taken.
1139  */
1140  tupledata = XLogRecGetBlockData(r, 0, &tuplelen);
1141  Assert(tupledata != NULL);
1142 
1143  data = tupledata;
1144  for (i = 0; i < xlrec->ntuples; i++)
1145  {
1146  ReorderBufferChange *change;
1147  xl_multi_insert_tuple *xlhdr;
1148  int datalen;
1149  HeapTuple tuple;
1150  HeapTupleHeader header;
1151 
1152  change = ReorderBufferGetChange(ctx->reorder);
1154  change->origin_id = XLogRecGetOrigin(r);
1155 
1156  memcpy(&change->data.tp.rlocator, &rlocator, sizeof(RelFileLocator));
1157 
1158  xlhdr = (xl_multi_insert_tuple *) SHORTALIGN(data);
1159  data = ((char *) xlhdr) + SizeOfMultiInsertTuple;
1160  datalen = xlhdr->datalen;
1161 
1162  change->data.tp.newtuple =
1163  ReorderBufferGetTupleBuf(ctx->reorder, datalen);
1164 
1165  tuple = change->data.tp.newtuple;
1166  header = tuple->t_data;
1167 
1168  /* not a disk based tuple */
1169  ItemPointerSetInvalid(&tuple->t_self);
1170 
1171  /*
1172  * We can only figure this out after reassembling the transactions.
1173  */
1174  tuple->t_tableOid = InvalidOid;
1175 
1176  tuple->t_len = datalen + SizeofHeapTupleHeader;
1177 
1178  memset(header, 0, SizeofHeapTupleHeader);
1179 
1180  memcpy((char *) tuple->t_data + SizeofHeapTupleHeader,
1181  (char *) data,
1182  datalen);
1183  header->t_infomask = xlhdr->t_infomask;
1184  header->t_infomask2 = xlhdr->t_infomask2;
1185  header->t_hoff = xlhdr->t_hoff;
1186 
1187  /*
1188  * Reset toast reassembly state only after the last row in the last
1189  * xl_multi_insert_tuple record emitted by one heap_multi_insert()
1190  * call.
1191  */
1192  if (xlrec->flags & XLH_INSERT_LAST_IN_MULTI &&
1193  (i + 1) == xlrec->ntuples)
1194  change->data.tp.clear_toast_afterwards = true;
1195  else
1196  change->data.tp.clear_toast_afterwards = false;
1197 
1199  buf->origptr, change, false);
1200 
1201  /* move to the next xl_multi_insert_tuple entry */
1202  data += datalen;
1203  }
1204  Assert(data == tupledata + tuplelen);
1205 }
#define SHORTALIGN(LEN)
Definition: c.h:812
#define XLH_INSERT_LAST_IN_MULTI
Definition: heapam_xlog.h:73
#define SizeOfMultiInsertTuple
Definition: heapam_xlog.h:199
#define SizeofHeapTupleHeader
Definition: htup_details.h:185
static void ItemPointerSetInvalid(ItemPointerData *pointer)
Definition: itemptr.h:184
const void * data
#define InvalidOid
Definition: postgres_ext.h:36
ItemPointerData t_self
Definition: htup.h:65
uint32 t_len
Definition: htup.h:64
HeapTupleHeader t_data
Definition: htup.h:68
Oid t_tableOid
Definition: htup.h:66

References ReorderBufferChange::action, Assert, buf, ReorderBufferChange::data, ReplicationSlot::data, data, ReplicationSlotPersistentData::database, xl_multi_insert_tuple::datalen, RelFileLocator::dbOid, FilterByOrigin(), xl_heap_multi_insert::flags, i, InvalidOid, ItemPointerSetInvalid(), xl_heap_multi_insert::ntuples, ReorderBufferChange::origin_id, LogicalDecodingContext::reorder, REORDER_BUFFER_CHANGE_INSERT, ReorderBufferGetChange(), ReorderBufferGetTupleBuf(), ReorderBufferQueueChange(), SHORTALIGN, SizeofHeapTupleHeader, SizeOfMultiInsertTuple, LogicalDecodingContext::slot, HeapTupleData::t_data, xl_multi_insert_tuple::t_hoff, HeapTupleHeaderData::t_hoff, xl_multi_insert_tuple::t_infomask, HeapTupleHeaderData::t_infomask, xl_multi_insert_tuple::t_infomask2, HeapTupleHeaderData::t_infomask2, HeapTupleData::t_len, HeapTupleData::t_self, HeapTupleData::t_tableOid, ReorderBufferChange::tp, XLH_INSERT_CONTAINS_NEW_TUPLE, XLH_INSERT_LAST_IN_MULTI, XLogRecGetBlockData(), XLogRecGetBlockTag(), XLogRecGetData, XLogRecGetOrigin, and XLogRecGetXid.

Referenced by heap2_decode().

◆ DecodePrepare()

static void DecodePrepare ( LogicalDecodingContext ctx,
XLogRecordBuffer buf,
xl_xact_parsed_prepare parsed 
)
static

Definition at line 759 of file decode.c.

761 {
762  SnapBuild *builder = ctx->snapshot_builder;
763  XLogRecPtr origin_lsn = parsed->origin_lsn;
764  TimestampTz prepare_time = parsed->xact_time;
765  RepOriginId origin_id = XLogRecGetOrigin(buf->record);
766  int i;
767  TransactionId xid = parsed->twophase_xid;
768 
769  if (parsed->origin_timestamp != 0)
770  prepare_time = parsed->origin_timestamp;
771 
772  /*
773  * Remember the prepare info for a txn so that it can be used later in
774  * commit prepared if required. See ReorderBufferFinishPrepared.
775  */
776  if (!ReorderBufferRememberPrepareInfo(ctx->reorder, xid, buf->origptr,
777  buf->endptr, prepare_time, origin_id,
778  origin_lsn))
779  return;
780 
781  /* We can't start streaming unless a consistent state is reached. */
783  {
785  return;
786  }
787 
788  /*
789  * Check whether we need to process this transaction. See
790  * DecodeTXNNeedSkip for the reasons why we sometimes want to skip the
791  * transaction.
792  *
793  * We can't call ReorderBufferForget as we did in DecodeCommit as the txn
794  * hasn't yet been committed, removing this txn before a commit might
795  * result in the computation of an incorrect restart_lsn. See
796  * SnapBuildProcessRunningXacts. But we need to process cache
797  * invalidations if there are any for the reasons mentioned in
798  * DecodeCommit.
799  */
800  if (DecodeTXNNeedSkip(ctx, buf, parsed->dbId, origin_id))
801  {
803  ReorderBufferInvalidate(ctx->reorder, xid, buf->origptr);
804  return;
805  }
806 
807  /* Tell the reorderbuffer about the surviving subtransactions. */
808  for (i = 0; i < parsed->nsubxacts; i++)
809  {
810  ReorderBufferCommitChild(ctx->reorder, xid, parsed->subxacts[i],
811  buf->origptr, buf->endptr);
812  }
813 
814  /* replay actions of all transaction + subtransactions in order */
815  ReorderBufferPrepare(ctx->reorder, xid, parsed->twophase_gid);
816 
817  /*
818  * Update the decoding stats at transaction prepare/commit/abort.
819  * Additionally we send the stats when we spill or stream the changes to
820  * avoid losing them in case the decoding is interrupted. It is not clear
821  * that sending more or less frequently than this would be better.
822  */
823  UpdateDecodingStats(ctx);
824 }
uint32 TransactionId
Definition: c.h:657
void ReorderBufferInvalidate(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn)
void ReorderBufferPrepare(ReorderBuffer *rb, TransactionId xid, char *gid)
void ReorderBufferSkipPrepare(ReorderBuffer *rb, TransactionId xid)
bool ReorderBufferRememberPrepareInfo(ReorderBuffer *rb, TransactionId xid, XLogRecPtr prepare_lsn, XLogRecPtr end_lsn, TimestampTz prepare_time, RepOriginId origin_id, XLogRecPtr origin_lsn)
SnapBuildState SnapBuildCurrentState(SnapBuild *builder)
Definition: snapbuild.c:277
@ SNAPBUILD_CONSISTENT
Definition: snapbuild.h:50
TransactionId twophase_xid
Definition: xact.h:397

References buf, xl_xact_parsed_commit::dbId, DecodeTXNNeedSkip(), i, xl_xact_parsed_commit::nsubxacts, xl_xact_parsed_commit::origin_lsn, xl_xact_parsed_commit::origin_timestamp, LogicalDecodingContext::reorder, ReorderBufferCommitChild(), ReorderBufferInvalidate(), ReorderBufferPrepare(), ReorderBufferRememberPrepareInfo(), ReorderBufferSkipPrepare(), SNAPBUILD_CONSISTENT, SnapBuildCurrentState(), LogicalDecodingContext::snapshot_builder, xl_xact_parsed_commit::subxacts, xl_xact_parsed_commit::twophase_gid, xl_xact_parsed_commit::twophase_xid, UpdateDecodingStats(), xl_xact_parsed_commit::xact_time, and XLogRecGetOrigin.

Referenced by xact_decode().

◆ DecodeSpecConfirm()

static void DecodeSpecConfirm ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)
static

Definition at line 1214 of file decode.c.

1215 {
1216  XLogReaderState *r = buf->record;
1217  ReorderBufferChange *change;
1218  RelFileLocator target_locator;
1219 
1220  /* only interested in our database */
1221  XLogRecGetBlockTag(r, 0, &target_locator, NULL, NULL);
1222  if (target_locator.dbOid != ctx->slot->data.database)
1223  return;
1224 
1225  /* output plugin doesn't look for this origin, no need to queue */
1226  if (FilterByOrigin(ctx, XLogRecGetOrigin(r)))
1227  return;
1228 
1229  change = ReorderBufferGetChange(ctx->reorder);
1231  change->origin_id = XLogRecGetOrigin(r);
1232 
1233  memcpy(&change->data.tp.rlocator, &target_locator, sizeof(RelFileLocator));
1234 
1235  change->data.tp.clear_toast_afterwards = true;
1236 
1238  change, false);
1239 }
@ REORDER_BUFFER_CHANGE_INTERNAL_SPEC_CONFIRM
Definition: reorderbuffer.h:61

References ReorderBufferChange::action, buf, ReorderBufferChange::data, ReplicationSlot::data, ReplicationSlotPersistentData::database, RelFileLocator::dbOid, FilterByOrigin(), ReorderBufferChange::origin_id, LogicalDecodingContext::reorder, REORDER_BUFFER_CHANGE_INTERNAL_SPEC_CONFIRM, ReorderBufferGetChange(), ReorderBufferQueueChange(), LogicalDecodingContext::slot, ReorderBufferChange::tp, XLogRecGetBlockTag(), XLogRecGetOrigin, and XLogRecGetXid.

Referenced by heap_decode().

◆ DecodeTruncate()

static void DecodeTruncate ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)
static

Definition at line 1070 of file decode.c.

1071 {
1072  XLogReaderState *r = buf->record;
1073  xl_heap_truncate *xlrec;
1074  ReorderBufferChange *change;
1075 
1076  xlrec = (xl_heap_truncate *) XLogRecGetData(r);
1077 
1078  /* only interested in our database */
1079  if (xlrec->dbId != ctx->slot->data.database)
1080  return;
1081 
1082  /* output plugin doesn't look for this origin, no need to queue */
1083  if (FilterByOrigin(ctx, XLogRecGetOrigin(r)))
1084  return;
1085 
1086  change = ReorderBufferGetChange(ctx->reorder);
1088  change->origin_id = XLogRecGetOrigin(r);
1089  if (xlrec->flags & XLH_TRUNCATE_CASCADE)
1090  change->data.truncate.cascade = true;
1091  if (xlrec->flags & XLH_TRUNCATE_RESTART_SEQS)
1092  change->data.truncate.restart_seqs = true;
1093  change->data.truncate.nrelids = xlrec->nrelids;
1094  change->data.truncate.relids = ReorderBufferGetRelids(ctx->reorder,
1095  xlrec->nrelids);
1096  memcpy(change->data.truncate.relids, xlrec->relids,
1097  xlrec->nrelids * sizeof(Oid));
1099  buf->origptr, change, false);
1100 }
#define XLH_TRUNCATE_RESTART_SEQS
Definition: heapam_xlog.h:127
#define XLH_TRUNCATE_CASCADE
Definition: heapam_xlog.h:126
unsigned int Oid
Definition: postgres_ext.h:31
Oid * ReorderBufferGetRelids(ReorderBuffer *rb, int nrelids)
@ REORDER_BUFFER_CHANGE_TRUNCATE
Definition: reorderbuffer.h:63
struct ReorderBufferChange::@108::@110 truncate
Oid relids[FLEXIBLE_ARRAY_MEMBER]
Definition: heapam_xlog.h:139

References ReorderBufferChange::action, buf, ReorderBufferChange::data, ReplicationSlot::data, ReplicationSlotPersistentData::database, xl_heap_truncate::dbId, FilterByOrigin(), xl_heap_truncate::flags, xl_heap_truncate::nrelids, ReorderBufferChange::origin_id, xl_heap_truncate::relids, LogicalDecodingContext::reorder, REORDER_BUFFER_CHANGE_TRUNCATE, ReorderBufferGetChange(), ReorderBufferGetRelids(), ReorderBufferQueueChange(), LogicalDecodingContext::slot, ReorderBufferChange::truncate, XLH_TRUNCATE_CASCADE, XLH_TRUNCATE_RESTART_SEQS, XLogRecGetData, XLogRecGetOrigin, and XLogRecGetXid.

Referenced by heap_decode().

◆ DecodeTXNNeedSkip()

static bool DecodeTXNNeedSkip ( LogicalDecodingContext ctx,
XLogRecordBuffer buf,
Oid  txn_dbid,
RepOriginId  origin_id 
)
static

Definition at line 1296 of file decode.c.

1298 {
1299  if (SnapBuildXactNeedsSkip(ctx->snapshot_builder, buf->origptr) ||
1300  (txn_dbid != InvalidOid && txn_dbid != ctx->slot->data.database) ||
1301  FilterByOrigin(ctx, origin_id))
1302  return true;
1303 
1304  /*
1305  * We also skip decoding in fast_forward mode. In passing set the
1306  * processing_required flag to indicate that if it were not for
1307  * fast_forward mode, processing would have been required.
1308  */
1309  if (ctx->fast_forward)
1310  {
1311  ctx->processing_required = true;
1312  return true;
1313  }
1314 
1315  return false;
1316 }
bool SnapBuildXactNeedsSkip(SnapBuild *builder, XLogRecPtr ptr)
Definition: snapbuild.c:304

References buf, ReplicationSlot::data, ReplicationSlotPersistentData::database, LogicalDecodingContext::fast_forward, FilterByOrigin(), InvalidOid, LogicalDecodingContext::processing_required, LogicalDecodingContext::slot, SnapBuildXactNeedsSkip(), and LogicalDecodingContext::snapshot_builder.

Referenced by DecodeAbort(), DecodeCommit(), and DecodePrepare().

◆ DecodeUpdate()

static void DecodeUpdate ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)
static

Definition at line 949 of file decode.c.

950 {
951  XLogReaderState *r = buf->record;
952  xl_heap_update *xlrec;
953  ReorderBufferChange *change;
954  char *data;
955  RelFileLocator target_locator;
956 
957  xlrec = (xl_heap_update *) XLogRecGetData(r);
958 
959  /* only interested in our database */
960  XLogRecGetBlockTag(r, 0, &target_locator, NULL, NULL);
961  if (target_locator.dbOid != ctx->slot->data.database)
962  return;
963 
964  /* output plugin doesn't look for this origin, no need to queue */
965  if (FilterByOrigin(ctx, XLogRecGetOrigin(r)))
966  return;
967 
968  change = ReorderBufferGetChange(ctx->reorder);
970  change->origin_id = XLogRecGetOrigin(r);
971  memcpy(&change->data.tp.rlocator, &target_locator, sizeof(RelFileLocator));
972 
974  {
975  Size datalen;
976  Size tuplelen;
977 
978  data = XLogRecGetBlockData(r, 0, &datalen);
979 
980  tuplelen = datalen - SizeOfHeapHeader;
981 
982  change->data.tp.newtuple =
983  ReorderBufferGetTupleBuf(ctx->reorder, tuplelen);
984 
985  DecodeXLogTuple(data, datalen, change->data.tp.newtuple);
986  }
987 
988  if (xlrec->flags & XLH_UPDATE_CONTAINS_OLD)
989  {
990  Size datalen;
991  Size tuplelen;
992 
993  /* caution, remaining data in record is not aligned */
995  datalen = XLogRecGetDataLen(r) - SizeOfHeapUpdate;
996  tuplelen = datalen - SizeOfHeapHeader;
997 
998  change->data.tp.oldtuple =
999  ReorderBufferGetTupleBuf(ctx->reorder, tuplelen);
1000 
1001  DecodeXLogTuple(data, datalen, change->data.tp.oldtuple);
1002  }
1003 
1004  change->data.tp.clear_toast_afterwards = true;
1005 
1007  change, false);
1008 }
#define SizeOfHeapUpdate
Definition: heapam_xlog.h:233
#define XLH_UPDATE_CONTAINS_NEW_TUPLE
Definition: heapam_xlog.h:90
#define XLH_UPDATE_CONTAINS_OLD
Definition: heapam_xlog.h:95
@ REORDER_BUFFER_CHANGE_UPDATE
Definition: reorderbuffer.h:53

References ReorderBufferChange::action, buf, ReorderBufferChange::data, ReplicationSlot::data, data, ReplicationSlotPersistentData::database, RelFileLocator::dbOid, DecodeXLogTuple(), FilterByOrigin(), xl_heap_update::flags, ReorderBufferChange::origin_id, LogicalDecodingContext::reorder, REORDER_BUFFER_CHANGE_UPDATE, ReorderBufferGetChange(), ReorderBufferGetTupleBuf(), ReorderBufferQueueChange(), SizeOfHeapHeader, SizeOfHeapUpdate, LogicalDecodingContext::slot, ReorderBufferChange::tp, XLH_UPDATE_CONTAINS_NEW_TUPLE, XLH_UPDATE_CONTAINS_OLD, XLogRecGetBlockData(), XLogRecGetBlockTag(), XLogRecGetData, XLogRecGetDataLen, XLogRecGetOrigin, and XLogRecGetXid.

Referenced by heap_decode().

◆ DecodeXLogTuple()

static void DecodeXLogTuple ( char *  data,
Size  len,
HeapTuple  tuple 
)
static

Definition at line 1250 of file decode.c.

1251 {
1252  xl_heap_header xlhdr;
1253  int datalen = len - SizeOfHeapHeader;
1254  HeapTupleHeader header;
1255 
1256  Assert(datalen >= 0);
1257 
1258  tuple->t_len = datalen + SizeofHeapTupleHeader;
1259  header = tuple->t_data;
1260 
1261  /* not a disk based tuple */
1262  ItemPointerSetInvalid(&tuple->t_self);
1263 
1264  /* we can only figure this out after reassembling the transactions */
1265  tuple->t_tableOid = InvalidOid;
1266 
1267  /* data is not stored aligned, copy to aligned storage */
1268  memcpy((char *) &xlhdr,
1269  data,
1271 
1272  memset(header, 0, SizeofHeapTupleHeader);
1273 
1274  memcpy(((char *) tuple->t_data) + SizeofHeapTupleHeader,
1276  datalen);
1277 
1278  header->t_infomask = xlhdr.t_infomask;
1279  header->t_infomask2 = xlhdr.t_infomask2;
1280  header->t_hoff = xlhdr.t_hoff;
1281 }
const void size_t len
uint16 t_infomask
Definition: heapam_xlog.h:153
uint16 t_infomask2
Definition: heapam_xlog.h:152

References Assert, data, InvalidOid, ItemPointerSetInvalid(), len, SizeOfHeapHeader, SizeofHeapTupleHeader, HeapTupleData::t_data, xl_heap_header::t_hoff, HeapTupleHeaderData::t_hoff, xl_heap_header::t_infomask, HeapTupleHeaderData::t_infomask, xl_heap_header::t_infomask2, HeapTupleHeaderData::t_infomask2, HeapTupleData::t_len, HeapTupleData::t_self, and HeapTupleData::t_tableOid.

Referenced by DecodeDelete(), DecodeInsert(), and DecodeUpdate().

◆ FilterByOrigin()

static bool FilterByOrigin ( LogicalDecodingContext ctx,
RepOriginId  origin_id 
)
inlinestatic

Definition at line 570 of file decode.c.

571 {
572  if (ctx->callbacks.filter_by_origin_cb == NULL)
573  return false;
574 
575  return filter_by_origin_cb_wrapper(ctx, origin_id);
576 }
bool filter_by_origin_cb_wrapper(LogicalDecodingContext *ctx, RepOriginId origin_id)
Definition: logical.c:1216
OutputPluginCallbacks callbacks
Definition: logical.h:53
LogicalDecodeFilterByOriginCB filter_by_origin_cb

References LogicalDecodingContext::callbacks, OutputPluginCallbacks::filter_by_origin_cb, and filter_by_origin_cb_wrapper().

Referenced by DecodeDelete(), DecodeInsert(), DecodeMultiInsert(), DecodeSpecConfirm(), DecodeTruncate(), DecodeTXNNeedSkip(), DecodeUpdate(), and logicalmsg_decode().

◆ FilterPrepare()

static bool FilterPrepare ( LogicalDecodingContext ctx,
TransactionId  xid,
const char *  gid 
)
inlinestatic

Definition at line 547 of file decode.c.

549 {
550  /*
551  * Skip if decoding of two-phase transactions at PREPARE time is not
552  * enabled. In that case, all two-phase transactions are considered
553  * filtered out and will be applied as regular transactions at COMMIT
554  * PREPARED.
555  */
556  if (!ctx->twophase)
557  return true;
558 
559  /*
560  * The filter_prepare callback is optional. When not supplied, all
561  * prepared transactions should go through.
562  */
563  if (ctx->callbacks.filter_prepare_cb == NULL)
564  return false;
565 
566  return filter_prepare_cb_wrapper(ctx, xid, gid);
567 }
bool filter_prepare_cb_wrapper(LogicalDecodingContext *ctx, TransactionId xid, const char *gid)
Definition: logical.c:1184
LogicalDecodeFilterPrepareCB filter_prepare_cb

References LogicalDecodingContext::callbacks, OutputPluginCallbacks::filter_prepare_cb, filter_prepare_cb_wrapper(), and LogicalDecodingContext::twophase.

Referenced by xact_decode().

◆ heap2_decode()

void heap2_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 405 of file decode.c.

406 {
407  uint8 info = XLogRecGetInfo(buf->record) & XLOG_HEAP_OPMASK;
408  TransactionId xid = XLogRecGetXid(buf->record);
409  SnapBuild *builder = ctx->snapshot_builder;
410 
411  ReorderBufferProcessXid(ctx->reorder, xid, buf->origptr);
412 
413  /*
414  * If we don't have snapshot or we are just fast-forwarding, there is no
415  * point in decoding changes.
416  */
418  ctx->fast_forward)
419  return;
420 
421  switch (info)
422  {
424  if (SnapBuildProcessChange(builder, xid, buf->origptr))
425  DecodeMultiInsert(ctx, buf);
426  break;
427  case XLOG_HEAP2_NEW_CID:
428  {
429  xl_heap_new_cid *xlrec;
430 
431  xlrec = (xl_heap_new_cid *) XLogRecGetData(buf->record);
432  SnapBuildProcessNewCid(builder, xid, buf->origptr, xlrec);
433 
434  break;
435  }
436  case XLOG_HEAP2_REWRITE:
437 
438  /*
439  * Although these records only exist to serve the needs of logical
440  * decoding, all the work happens as part of crash or archive
441  * recovery, so we don't need to do anything here.
442  */
443  break;
444 
445  /*
446  * Everything else here is just low level physical stuff we're not
447  * interested in.
448  */
452  case XLOG_HEAP2_VISIBLE:
454  break;
455  default:
456  elog(ERROR, "unexpected RM_HEAP2_ID record type: %u", info);
457  }
458 }
unsigned char uint8
Definition: c.h:516
static void DecodeMultiInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:1108
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:225
#define XLOG_HEAP2_MULTI_INSERT
Definition: heapam_xlog.h:64
#define XLOG_HEAP2_REWRITE
Definition: heapam_xlog.h:59
#define XLOG_HEAP_OPMASK
Definition: heapam_xlog.h:42
#define XLOG_HEAP2_PRUNE_VACUUM_SCAN
Definition: heapam_xlog.h:61
#define XLOG_HEAP2_LOCK_UPDATED
Definition: heapam_xlog.h:65
#define XLOG_HEAP2_PRUNE_ON_ACCESS
Definition: heapam_xlog.h:60
#define XLOG_HEAP2_NEW_CID
Definition: heapam_xlog.h:66
#define XLOG_HEAP2_PRUNE_VACUUM_CLEANUP
Definition: heapam_xlog.h:62
#define XLOG_HEAP2_VISIBLE
Definition: heapam_xlog.h:63
void ReorderBufferProcessXid(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn)
bool SnapBuildProcessChange(SnapBuild *builder, TransactionId xid, XLogRecPtr lsn)
Definition: snapbuild.c:639
void SnapBuildProcessNewCid(SnapBuild *builder, TransactionId xid, XLogRecPtr lsn, xl_heap_new_cid *xlrec)
Definition: snapbuild.c:689
@ SNAPBUILD_FULL_SNAPSHOT
Definition: snapbuild.h:43
#define XLogRecGetInfo(decoder)
Definition: xlogreader.h:410

References buf, DecodeMultiInsert(), elog, ERROR, LogicalDecodingContext::fast_forward, LogicalDecodingContext::reorder, ReorderBufferProcessXid(), SNAPBUILD_FULL_SNAPSHOT, SnapBuildCurrentState(), SnapBuildProcessChange(), SnapBuildProcessNewCid(), LogicalDecodingContext::snapshot_builder, XLOG_HEAP2_LOCK_UPDATED, XLOG_HEAP2_MULTI_INSERT, XLOG_HEAP2_NEW_CID, XLOG_HEAP2_PRUNE_ON_ACCESS, XLOG_HEAP2_PRUNE_VACUUM_CLEANUP, XLOG_HEAP2_PRUNE_VACUUM_SCAN, XLOG_HEAP2_REWRITE, XLOG_HEAP2_VISIBLE, XLOG_HEAP_OPMASK, XLogRecGetData, XLogRecGetInfo, and XLogRecGetXid.

◆ heap_decode()

void heap_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 464 of file decode.c.

465 {
466  uint8 info = XLogRecGetInfo(buf->record) & XLOG_HEAP_OPMASK;
467  TransactionId xid = XLogRecGetXid(buf->record);
468  SnapBuild *builder = ctx->snapshot_builder;
469 
470  ReorderBufferProcessXid(ctx->reorder, xid, buf->origptr);
471 
472  /*
473  * If we don't have snapshot or we are just fast-forwarding, there is no
474  * point in decoding data changes.
475  */
477  ctx->fast_forward)
478  return;
479 
480  switch (info)
481  {
482  case XLOG_HEAP_INSERT:
483  if (SnapBuildProcessChange(builder, xid, buf->origptr))
484  DecodeInsert(ctx, buf);
485  break;
486 
487  /*
488  * Treat HOT update as normal updates. There is no useful
489  * information in the fact that we could make it a HOT update
490  * locally and the WAL layout is compatible.
491  */
493  case XLOG_HEAP_UPDATE:
494  if (SnapBuildProcessChange(builder, xid, buf->origptr))
495  DecodeUpdate(ctx, buf);
496  break;
497 
498  case XLOG_HEAP_DELETE:
499  if (SnapBuildProcessChange(builder, xid, buf->origptr))
500  DecodeDelete(ctx, buf);
501  break;
502 
503  case XLOG_HEAP_TRUNCATE:
504  if (SnapBuildProcessChange(builder, xid, buf->origptr))
505  DecodeTruncate(ctx, buf);
506  break;
507 
508  case XLOG_HEAP_INPLACE:
509 
510  /*
511  * Inplace updates are only ever performed on catalog tuples and
512  * can, per definition, not change tuple visibility. Inplace
513  * updates don't affect storage or interpretation of table rows,
514  * so they don't affect logicalrep_write_tuple() outcomes. Hence,
515  * we don't process invalidations from the original operation. If
516  * inplace updates did affect those things, invalidations wouldn't
517  * make it work, since there are no snapshot-specific versions of
518  * inplace-updated values. Since we also don't decode catalog
519  * tuples, we're not interested in the record's contents.
520  *
521  * WAL contains likely-unnecessary commit-time invals from the
522  * CacheInvalidateHeapTuple() call in heap_inplace_update().
523  * Excess invalidation is safe.
524  */
525  break;
526 
527  case XLOG_HEAP_CONFIRM:
528  if (SnapBuildProcessChange(builder, xid, buf->origptr))
529  DecodeSpecConfirm(ctx, buf);
530  break;
531 
532  case XLOG_HEAP_LOCK:
533  /* we don't care about row level locks for now */
534  break;
535 
536  default:
537  elog(ERROR, "unexpected RM_HEAP_ID record type: %u", info);
538  break;
539  }
540 }
static void DecodeDelete(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:1016
static void DecodeInsert(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:890
static void DecodeTruncate(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:1070
static void DecodeUpdate(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:949
static void DecodeSpecConfirm(LogicalDecodingContext *ctx, XLogRecordBuffer *buf)
Definition: decode.c:1214
#define XLOG_HEAP_HOT_UPDATE
Definition: heapam_xlog.h:37
#define XLOG_HEAP_DELETE
Definition: heapam_xlog.h:34
#define XLOG_HEAP_TRUNCATE
Definition: heapam_xlog.h:36
#define XLOG_HEAP_UPDATE
Definition: heapam_xlog.h:35
#define XLOG_HEAP_INPLACE
Definition: heapam_xlog.h:40
#define XLOG_HEAP_LOCK
Definition: heapam_xlog.h:39
#define XLOG_HEAP_INSERT
Definition: heapam_xlog.h:33
#define XLOG_HEAP_CONFIRM
Definition: heapam_xlog.h:38

References buf, DecodeDelete(), DecodeInsert(), DecodeSpecConfirm(), DecodeTruncate(), DecodeUpdate(), elog, ERROR, LogicalDecodingContext::fast_forward, LogicalDecodingContext::reorder, ReorderBufferProcessXid(), SNAPBUILD_FULL_SNAPSHOT, SnapBuildCurrentState(), SnapBuildProcessChange(), LogicalDecodingContext::snapshot_builder, 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 88 of file decode.c.

89 {
91  TransactionId txid;
92  RmgrData rmgr;
93 
94  buf.origptr = ctx->reader->ReadRecPtr;
95  buf.endptr = ctx->reader->EndRecPtr;
96  buf.record = record;
97 
98  txid = XLogRecGetTopXid(record);
99 
100  /*
101  * If the top-level xid is valid, we need to assign the subxact to the
102  * top-level xact. We need to do this for all records, hence we do it
103  * before the switch.
104  */
105  if (TransactionIdIsValid(txid))
106  {
108  txid,
109  XLogRecGetXid(record),
110  buf.origptr);
111  }
112 
113  rmgr = GetRmgr(XLogRecGetRmid(record));
114 
115  if (rmgr.rm_decode != NULL)
116  rmgr.rm_decode(ctx, &buf);
117  else
118  {
119  /* just deal with xid, and done */
121  buf.origptr);
122  }
123 }
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
#define TransactionIdIsValid(xid)
Definition: transam.h:41
static RmgrData GetRmgr(RmgrId rmid)
#define XLogRecGetRmid(decoder)
Definition: xlogreader.h:411
#define XLogRecGetTopXid(decoder)
Definition: xlogreader.h:414

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

Referenced by DecodingContextFindStartpoint(), LogicalReplicationSlotHasPendingWal(), LogicalSlotAdvanceAndCheckSnapState(), pg_logical_slot_get_changes_guts(), and XLogSendLogical().

◆ logicalmsg_decode()

void logicalmsg_decode ( LogicalDecodingContext ctx,
XLogRecordBuffer buf 
)

Definition at line 582 of file decode.c.

583 {
584  SnapBuild *builder = ctx->snapshot_builder;
585  XLogReaderState *r = buf->record;
586  TransactionId xid = XLogRecGetXid(r);
587  uint8 info = XLogRecGetInfo(r) & ~XLR_INFO_MASK;
588  RepOriginId origin_id = XLogRecGetOrigin(r);
589  Snapshot snapshot = NULL;
590  xl_logical_message *message;
591 
592  if (info != XLOG_LOGICAL_MESSAGE)
593  elog(ERROR, "unexpected RM_LOGICALMSG_ID record type: %u", info);
594 
595  ReorderBufferProcessXid(ctx->reorder, XLogRecGetXid(r), buf->origptr);
596 
597  /* If we don't have snapshot, there is no point in decoding messages */
599  return;
600 
601  message = (xl_logical_message *) XLogRecGetData(r);
602 
603  if (message->dbId != ctx->slot->data.database ||
604  FilterByOrigin(ctx, origin_id))
605  return;
606 
607  if (message->transactional &&
608  !SnapBuildProcessChange(builder, xid, buf->origptr))
609  return;
610  else if (!message->transactional &&
612  SnapBuildXactNeedsSkip(builder, buf->origptr)))
613  return;
614 
615  /*
616  * We also skip decoding in fast_forward mode. This check must be last
617  * because we don't want to set the processing_required flag unless we
618  * have a decodable message.
619  */
620  if (ctx->fast_forward)
621  {
622  /*
623  * We need to set processing_required flag to notify the message's
624  * existence to the caller. Usually, the flag is set when either the
625  * COMMIT or ABORT records are decoded, but this must be turned on
626  * here because the non-transactional logical message is decoded
627  * without waiting for these records.
628  */
629  if (!message->transactional)
630  ctx->processing_required = true;
631 
632  return;
633  }
634 
635  /*
636  * If this is a non-transactional change, get the snapshot we're expected
637  * to use. We only get here when the snapshot is consistent, and the
638  * change is not meant to be skipped.
639  *
640  * For transactional changes we don't need a snapshot, we'll use the
641  * regular snapshot maintained by ReorderBuffer. We just leave it NULL.
642  */
643  if (!message->transactional)
644  snapshot = SnapBuildGetOrBuildSnapshot(builder);
645 
646  ReorderBufferQueueMessage(ctx->reorder, xid, snapshot, buf->endptr,
647  message->transactional,
648  message->message, /* first part of message is
649  * prefix */
650  message->message_size,
651  message->message + message->prefix_size);
652 }
#define XLOG_LOGICAL_MESSAGE
Definition: message.h:37
void ReorderBufferQueueMessage(ReorderBuffer *rb, TransactionId xid, Snapshot snap, XLogRecPtr lsn, bool transactional, const char *prefix, Size message_size, const char *message)
Snapshot SnapBuildGetOrBuildSnapshot(SnapBuild *builder)
Definition: snapbuild.c:579
bool transactional
Definition: message.h:23
char message[FLEXIBLE_ARRAY_MEMBER]
Definition: message.h:27
#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::processing_required, 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 359 of file decode.c.

360 {
361  SnapBuild *builder = ctx->snapshot_builder;
362  XLogReaderState *r = buf->record;
363  uint8 info = XLogRecGetInfo(r) & ~XLR_INFO_MASK;
364 
365  ReorderBufferProcessXid(ctx->reorder, XLogRecGetXid(r), buf->origptr);
366 
367  switch (info)
368  {
369  case XLOG_RUNNING_XACTS:
370  {
372 
373  SnapBuildProcessRunningXacts(builder, buf->origptr, running);
374 
375  /*
376  * Abort all transactions that we keep track of, that are
377  * older than the record's oldestRunningXid. This is the most
378  * convenient spot for doing so since, in contrast to shutdown
379  * or end-of-recovery checkpoints, we have information about
380  * all running transactions which includes prepared ones,
381  * while shutdown checkpoints just know that no non-prepared
382  * transactions are in progress.
383  */
385  }
386  break;
387  case XLOG_STANDBY_LOCK:
388  break;
389  case XLOG_INVALIDATIONS:
390 
391  /*
392  * We are processing the invalidations at the command level via
393  * XLOG_XACT_INVALIDATIONS. So we don't need to do anything here.
394  */
395  break;
396  default:
397  elog(ERROR, "unexpected RM_STANDBY_ID record type: %u", info);
398  }
399 }
void ReorderBufferAbortOld(ReorderBuffer *rb, TransactionId oldestRunningXid)
void SnapBuildProcessRunningXacts(SnapBuild *builder, XLogRecPtr lsn, xl_running_xacts *running)
Definition: snapbuild.c:1088
#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 201 of file decode.c.

202 {
203  SnapBuild *builder = ctx->snapshot_builder;
204  ReorderBuffer *reorder = ctx->reorder;
205  XLogReaderState *r = buf->record;
207 
208  /*
209  * If the snapshot isn't yet fully built, we cannot decode anything, so
210  * bail out.
211  */
213  return;
214 
215  switch (info)
216  {
217  case XLOG_XACT_COMMIT:
219  {
220  xl_xact_commit *xlrec;
221  xl_xact_parsed_commit parsed;
222  TransactionId xid;
223  bool two_phase = false;
224 
225  xlrec = (xl_xact_commit *) XLogRecGetData(r);
226  ParseCommitRecord(XLogRecGetInfo(buf->record), xlrec, &parsed);
227 
228  if (!TransactionIdIsValid(parsed.twophase_xid))
229  xid = XLogRecGetXid(r);
230  else
231  xid = parsed.twophase_xid;
232 
233  /*
234  * We would like to process the transaction in a two-phase
235  * manner iff output plugin supports two-phase commits and
236  * doesn't filter the transaction at prepare time.
237  */
238  if (info == XLOG_XACT_COMMIT_PREPARED)
239  two_phase = !(FilterPrepare(ctx, xid,
240  parsed.twophase_gid));
241 
242  DecodeCommit(ctx, buf, &parsed, xid, two_phase);
243  break;
244  }
245  case XLOG_XACT_ABORT:
247  {
248  xl_xact_abort *xlrec;
249  xl_xact_parsed_abort parsed;
250  TransactionId xid;
251  bool two_phase = false;
252 
253  xlrec = (xl_xact_abort *) XLogRecGetData(r);
254  ParseAbortRecord(XLogRecGetInfo(buf->record), xlrec, &parsed);
255 
256  if (!TransactionIdIsValid(parsed.twophase_xid))
257  xid = XLogRecGetXid(r);
258  else
259  xid = parsed.twophase_xid;
260 
261  /*
262  * We would like to process the transaction in a two-phase
263  * manner iff output plugin supports two-phase commits and
264  * doesn't filter the transaction at prepare time.
265  */
266  if (info == XLOG_XACT_ABORT_PREPARED)
267  two_phase = !(FilterPrepare(ctx, xid,
268  parsed.twophase_gid));
269 
270  DecodeAbort(ctx, buf, &parsed, xid, two_phase);
271  break;
272  }
274 
275  /*
276  * We assign subxact to the toplevel xact while processing each
277  * record if required. So, we don't need to do anything here. See
278  * LogicalDecodingProcessRecord.
279  */
280  break;
282  {
283  TransactionId xid;
284  xl_xact_invals *invals;
285 
286  xid = XLogRecGetXid(r);
287  invals = (xl_xact_invals *) XLogRecGetData(r);
288 
289  /*
290  * Execute the invalidations for xid-less transactions,
291  * otherwise, accumulate them so that they can be processed at
292  * the commit time.
293  */
294  if (TransactionIdIsValid(xid))
295  {
296  if (!ctx->fast_forward)
297  ReorderBufferAddInvalidations(reorder, xid,
298  buf->origptr,
299  invals->nmsgs,
300  invals->msgs);
302  buf->origptr);
303  }
304  else if (!ctx->fast_forward)
306  invals->nmsgs,
307  invals->msgs);
308 
309  break;
310  }
311  case XLOG_XACT_PREPARE:
312  {
313  xl_xact_parsed_prepare parsed;
314  xl_xact_prepare *xlrec;
315 
316  /* ok, parse it */
317  xlrec = (xl_xact_prepare *) XLogRecGetData(r);
319  xlrec, &parsed);
320 
321  /*
322  * We would like to process the transaction in a two-phase
323  * manner iff output plugin supports two-phase commits and
324  * doesn't filter the transaction at prepare time.
325  */
326  if (FilterPrepare(ctx, parsed.twophase_xid,
327  parsed.twophase_gid))
328  {
329  ReorderBufferProcessXid(reorder, parsed.twophase_xid,
330  buf->origptr);
331  break;
332  }
333 
334  /*
335  * Note that if the prepared transaction has locked [user]
336  * catalog tables exclusively then decoding prepare can block
337  * till the main transaction is committed because it needs to
338  * lock the catalog tables.
339  *
340  * XXX Now, this can even lead to a deadlock if the prepare
341  * transaction is waiting to get it logically replicated for
342  * distributed 2PC. This can be avoided by disallowing
343  * preparing transactions that have locked [user] catalog
344  * tables exclusively but as of now, we ask users not to do
345  * such an operation.
346  */
347  DecodePrepare(ctx, buf, &parsed);
348  break;
349  }
350  default:
351  elog(ERROR, "unexpected RM_XACT_ID record type: %u", info);
352  }
353 }
static void DecodeAbort(LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_abort *parsed, TransactionId xid, bool two_phase)
Definition: decode.c:834
static bool FilterPrepare(LogicalDecodingContext *ctx, TransactionId xid, const char *gid)
Definition: decode.c:547
static void DecodeCommit(LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_commit *parsed, TransactionId xid, bool two_phase)
Definition: decode.c:663
static void DecodePrepare(LogicalDecodingContext *ctx, XLogRecordBuffer *buf, xl_xact_parsed_prepare *parsed)
Definition: decode.c:759
void ReorderBufferXidSetCatalogChanges(ReorderBuffer *rb, TransactionId xid, XLogRecPtr lsn)
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:305
int nmsgs
Definition: xact.h:304
TransactionId twophase_xid
Definition: xact.h:427
#define XLOG_XACT_COMMIT_PREPARED
Definition: xact.h:172
#define XLOG_XACT_INVALIDATIONS
Definition: xact.h:175
#define XLOG_XACT_PREPARE
Definition: xact.h:170
#define XLOG_XACT_COMMIT
Definition: xact.h:169
#define XLOG_XACT_OPMASK
Definition: xact.h:179
#define XLOG_XACT_ABORT
Definition: xact.h:171
#define XLOG_XACT_ASSIGNMENT
Definition: xact.h:174
#define XLOG_XACT_ABORT_PREPARED
Definition: xact.h:173
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 129 of file decode.c.

130 {
131  SnapBuild *builder = ctx->snapshot_builder;
132  uint8 info = XLogRecGetInfo(buf->record) & ~XLR_INFO_MASK;
133 
135  buf->origptr);
136 
137  switch (info)
138  {
139  /* this is also used in END_OF_RECOVERY checkpoints */
142  SnapBuildSerializationPoint(builder, buf->origptr);
143 
144  break;
146 
147  /*
148  * a RUNNING_XACTS record will have been logged near to this, we
149  * can restart from there.
150  */
151  break;
153  {
154  xl_parameter_change *xlrec =
156 
157  /*
158  * If wal_level on the primary is reduced to less than
159  * logical, we want to prevent existing logical slots from
160  * being used. Existing logical slots on the standby get
161  * invalidated when this WAL record is replayed; and further,
162  * slot creation fails when wal_level is not sufficient; but
163  * all these operations are not synchronized, so a logical
164  * slot may creep in while the wal_level is being reduced.
165  * Hence this extra check.
166  */
167  if (xlrec->wal_level < WAL_LEVEL_LOGICAL)
168  {
169  /*
170  * This can occur only on a standby, as a primary would
171  * not allow to restart after changing wal_level < logical
172  * if there is pre-existing logical slot.
173  */
175  ereport(ERROR,
176  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
177  errmsg("logical decoding on standby requires \"wal_level\" >= \"logical\" on the primary")));
178  }
179  break;
180  }
181  case XLOG_NOOP:
182  case XLOG_NEXTOID:
183  case XLOG_SWITCH:
184  case XLOG_BACKUP_END:
185  case XLOG_RESTORE_POINT:
186  case XLOG_FPW_CHANGE:
187  case XLOG_FPI_FOR_HINT:
188  case XLOG_FPI:
191  break;
192  default:
193  elog(ERROR, "unexpected RM_XLOG_ID record type: %u", info);
194  }
195 }
int errcode(int sqlerrcode)
Definition: elog.c:853
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define ereport(elevel,...)
Definition: elog.h:149
#define XLOG_RESTORE_POINT
Definition: pg_control.h:75
#define XLOG_FPW_CHANGE
Definition: pg_control.h:76
#define XLOG_CHECKPOINT_REDO
Definition: pg_control.h:82
#define XLOG_OVERWRITE_CONTRECORD
Definition: pg_control.h:81
#define XLOG_FPI
Definition: pg_control.h:79
#define XLOG_FPI_FOR_HINT
Definition: pg_control.h:78
#define XLOG_NEXTOID
Definition: pg_control.h:71
#define XLOG_NOOP
Definition: pg_control.h:70
#define XLOG_CHECKPOINT_SHUTDOWN
Definition: pg_control.h:68
#define XLOG_SWITCH
Definition: pg_control.h:72
#define XLOG_BACKUP_END
Definition: pg_control.h:73
#define XLOG_PARAMETER_CHANGE
Definition: pg_control.h:74
#define XLOG_CHECKPOINT_ONLINE
Definition: pg_control.h:69
#define XLOG_END_OF_RECOVERY
Definition: pg_control.h:77
void SnapBuildSerializationPoint(SnapBuild *builder, XLogRecPtr lsn)
Definition: snapbuild.c:1436
bool RecoveryInProgress(void)
Definition: xlog.c:6334
@ WAL_LEVEL_LOGICAL
Definition: xlog.h:76

References Assert, buf, elog, ereport, errcode(), errmsg(), ERROR, RecoveryInProgress(), LogicalDecodingContext::reorder, ReorderBufferProcessXid(), SnapBuildSerializationPoint(), LogicalDecodingContext::snapshot_builder, xl_parameter_change::wal_level, WAL_LEVEL_LOGICAL, XLOG_BACKUP_END, XLOG_CHECKPOINT_ONLINE, XLOG_CHECKPOINT_REDO, 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, XLogRecGetData, XLogRecGetInfo, XLogRecGetXid, and XLR_INFO_MASK.