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Logical replication

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- Add PUBLICATION catalogs and DDL
- Add SUBSCRIPTION catalog and DDL
- Define logical replication protocol and output plugin
- Add logical replication workers

From: Petr Jelinek <petr@2ndquadrant.com>
Reviewed-by: Steve Singer <steve@ssinger.info>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Erik Rijkers <er@xs4all.nl>
Reviewed-by: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
This commit is contained in:
Peter Eisentraut
2017-01-19 12:00:00 -05:00
parent ba61a04bc7
commit 665d1fad99
119 changed files with 13354 additions and 95 deletions
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104
src/include/replication/logicalproto.h Normal file
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/*-------------------------------------------------------------------------
*
* logicalproto.h
* logical replication protocol
*
* Copyright (c) 2015, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/include/replication/logicalproto.h
*
*-------------------------------------------------------------------------
*/
#ifndef LOGICAL_PROTO_H
#define LOGICAL_PROTO_H
#include "replication/reorderbuffer.h"
#include "utils/rel.h"
/*
* Protocol capabilities
*
* LOGICAL_PROTO_VERSION_NUM is our native protocol and the greatest version
* we can support. PGLOGICAL_PROTO_MIN_VERSION_NUM is the oldest version we
* have backwards compatibility for. The client requests protocol version at
* connect time.
*/
#define LOGICALREP_PROTO_MIN_VERSION_NUM 1
#define LOGICALREP_PROTO_VERSION_NUM 1
/* Tuple coming via logical replication. */
typedef struct LogicalRepTupleData
{
char *values[MaxTupleAttributeNumber]; /* value in out function format or NULL if values is NULL */
bool changed[MaxTupleAttributeNumber]; /* marker for changed/unchanged values */
} LogicalRepTupleData;
typedef uint32 LogicalRepRelId;
/* Relation information */
typedef struct LogicalRepRelation
{
/* Info coming from the remote side. */
LogicalRepRelId remoteid; /* unique id of the relation */
char *nspname; /* schema name */
char *relname; /* relation name */
int natts; /* number of columns */
char **attnames; /* column names */
Oid *atttyps; /* column types */
char replident; /* replica identity */
Bitmapset *attkeys; /* Bitmap of key columns */
} LogicalRepRelation;
/* Type mapping info */
typedef struct LogicalRepTyp
{
Oid remoteid; /* unique id of the type */
char *nspname; /* schema name */
char *typname; /* name of the type */
Oid typoid; /* local type Oid */
} LogicalRepTyp;
/* Transaction info */
typedef struct LogicalRepBeginData
{
XLogRecPtr final_lsn;
TimestampTz committime;
TransactionId xid;
} LogicalRepBeginData;
typedef struct LogicalRepCommitData
{
XLogRecPtr commit_lsn;
XLogRecPtr end_lsn;
TimestampTz committime;
} LogicalRepCommitData;
extern void logicalrep_write_begin(StringInfo out, ReorderBufferTXN *txn);
extern void logicalrep_read_begin(StringInfo in,
LogicalRepBeginData *begin_data);
extern void logicalrep_write_commit(StringInfo out, ReorderBufferTXN *txn,
XLogRecPtr commit_lsn);
extern void logicalrep_read_commit(StringInfo in,
LogicalRepCommitData *commit_data);
extern void logicalrep_write_origin(StringInfo out, const char *origin,
XLogRecPtr origin_lsn);
extern char *logicalrep_read_origin(StringInfo in, XLogRecPtr *origin_lsn);
extern void logicalrep_write_insert(StringInfo out, Relation rel,
HeapTuple newtuple);
extern LogicalRepRelId logicalrep_read_insert(StringInfo in, LogicalRepTupleData *newtup);
extern void logicalrep_write_update(StringInfo out, Relation rel, HeapTuple oldtuple,
HeapTuple newtuple);
extern LogicalRepRelId logicalrep_read_update(StringInfo in,
bool *has_oldtuple, LogicalRepTupleData *oldtup,
LogicalRepTupleData *newtup);
extern void logicalrep_write_delete(StringInfo out, Relation rel,
HeapTuple oldtuple);
extern LogicalRepRelId logicalrep_read_delete(StringInfo in,
LogicalRepTupleData *oldtup);
extern void logicalrep_write_rel(StringInfo out, Relation rel);
extern LogicalRepRelation *logicalrep_read_rel(StringInfo in);
extern void logicalrep_write_typ(StringInfo out, Oid typoid);
extern void logicalrep_read_typ(StringInfo out, LogicalRepTyp *ltyp);
#endif /* LOGICALREP_PROTO_H */