PostgreSQL Source Code  git master
message.c File Reference
#include "postgres.h"
#include "access/xact.h"
#include "access/xloginsert.h"
#include "miscadmin.h"
#include "nodes/execnodes.h"
#include "replication/logical.h"
#include "replication/message.h"
#include "utils/memutils.h"
Include dependency graph for message.c:

Go to the source code of this file.

Functions

XLogRecPtr LogLogicalMessage (const char *prefix, const char *message, size_t size, bool transactional)
 
void logicalmsg_redo (XLogReaderState *record)
 

Function Documentation

◆ logicalmsg_redo()

void logicalmsg_redo ( XLogReaderState record)

Definition at line 81 of file message.c.

82 {
83  uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
84 
85  if (info != XLOG_LOGICAL_MESSAGE)
86  elog(PANIC, "logicalmsg_redo: unknown op code %u", info);
87 
88  /* This is only interesting for logical decoding, see decode.c. */
89 }
unsigned char uint8
Definition: c.h:493
#define PANIC
Definition: elog.h:42
#define XLOG_LOGICAL_MESSAGE
Definition: message.h:36
#define XLogRecGetInfo(decoder)
Definition: xlogreader.h:410
#define XLR_INFO_MASK
Definition: xlogrecord.h:62

References elog(), PANIC, XLOG_LOGICAL_MESSAGE, XLogRecGetInfo, and XLR_INFO_MASK.

◆ LogLogicalMessage()

XLogRecPtr LogLogicalMessage ( const char *  prefix,
const char *  message,
size_t  size,
bool  transactional 
)

Definition at line 46 of file message.c.

48 {
49  xl_logical_message xlrec;
50 
51  /*
52  * Force xid to be allocated if we're emitting a transactional message.
53  */
54  if (transactional)
55  {
58  }
59 
60  xlrec.dbId = MyDatabaseId;
61  xlrec.transactional = transactional;
62  /* trailing zero is critical; see logicalmsg_desc */
63  xlrec.prefix_size = strlen(prefix) + 1;
64  xlrec.message_size = size;
65 
67  XLogRegisterData((char *) &xlrec, SizeOfLogicalMessage);
68  XLogRegisterData(unconstify(char *, prefix), xlrec.prefix_size);
69  XLogRegisterData(unconstify(char *, message), size);
70 
71  /* allow origin filtering */
73 
74  return XLogInsert(RM_LOGICALMSG_ID, XLOG_LOGICAL_MESSAGE);
75 }
#define unconstify(underlying_type, expr)
Definition: c.h:1255
Oid MyDatabaseId
Definition: globals.c:89
Assert(fmt[strlen(fmt) - 1] !='\n')
#define SizeOfLogicalMessage
Definition: message.h:30
bool transactional
Definition: message.h:23
bool IsTransactionState(void)
Definition: xact.c:378
TransactionId GetCurrentTransactionId(void)
Definition: xact.c:445
#define XLOG_INCLUDE_ORIGIN
Definition: xlog.h:149
void XLogRegisterData(char *data, uint32 len)
Definition: xloginsert.c:351
XLogRecPtr XLogInsert(RmgrId rmid, uint8 info)
Definition: xloginsert.c:461
void XLogSetRecordFlags(uint8 flags)
Definition: xloginsert.c:443
void XLogBeginInsert(void)
Definition: xloginsert.c:150

References Assert(), xl_logical_message::dbId, GetCurrentTransactionId(), IsTransactionState(), xl_logical_message::message_size, MyDatabaseId, xl_logical_message::prefix_size, SizeOfLogicalMessage, xl_logical_message::transactional, unconstify, XLOG_INCLUDE_ORIGIN, XLOG_LOGICAL_MESSAGE, XLogBeginInsert(), XLogInsert(), XLogRegisterData(), and XLogSetRecordFlags().

Referenced by pg_logical_emit_message_bytea().