Quelle output_plugin.h
Sprache: C
/*-------------------------------------------------------------------------
* output_plugin . h
* PostgreSQL Logical Decode Plugin Interface
*
* Copyright ( c ) 2012 - 2025 , PostgreSQL Global Development Group
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#ifndef OUTPUT_PLUGIN_H
#define OUTPUT_PLUGIN_H
#include "replication/reorderbuffer.h"
struct LogicalDecodingContext;
struct OutputPluginCallbacks;
typedef enum OutputPluginOutputType
{
OUTPUT_PLUGIN_BINARY_OUTPUT,
OUTPUT_PLUGIN_TEXTUAL_OUTPUT,
} OutputPluginOutputType;
/*
* Options set by the output plugin , in the startup callback .
*/
typedef struct OutputPluginOptions
{
OutputPluginOutputType output_type;
bool receive_rewrites;
} OutputPluginOptions;
/*
* Type of the shared library symbol _ PG_output_plugin_init that is looked up
* when loading an output plugin shared library .
*/
typedef void (*LogicalOutputPluginInit) (struct OutputPluginCallbacks *cb);
extern PGDLLEXPORT void _PG_output_plugin_init(struct OutputPluginCallbacks *cb);
/*
* Callback that gets called in a user - defined plugin . ctx - > private_data can
* be set to some private data .
*
* " is_init " will be set to " true " if the decoding slot just got defined . When
* the same slot is used from there one , it will be " false " .
*/
typedef void (*LogicalDecodeStartupCB) (struct LogicalDecodingContext *ctx,
OutputPluginOptions *options,
bool is_init);
/*
* Callback called for every ( explicit or implicit ) BEGIN of a successful
* transaction .
*/
typedef void (*LogicalDecodeBeginCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn);
/*
* Callback for every individual change in a successful transaction .
*/
typedef void (*LogicalDecodeChangeCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
Relation relation,
ReorderBufferChange *change);
/*
* Callback for every TRUNCATE in a successful transaction .
*/
typedef void (*LogicalDecodeTruncateCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
int nrelations,
Relation relations[],
ReorderBufferChange *change);
/*
* Called for every ( explicit or implicit ) COMMIT of a successful transaction .
*/
typedef void (*LogicalDecodeCommitCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr commit_lsn);
/*
* Called for the generic logical decoding messages .
*/
typedef void (*LogicalDecodeMessageCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr message_lsn,
bool transactional,
const char *prefix,
Size message_size,
const char *message);
/*
* Filter changes by origin .
*/
typedef bool (*LogicalDecodeFilterByOriginCB) (struct LogicalDecodingContext *ctx,
RepOriginId origin_id);
/*
* Called to shutdown an output plugin .
*/
typedef void (*LogicalDecodeShutdownCB) (struct LogicalDecodingContext *ctx);
/*
* Called before decoding of PREPARE record to decide whether this
* transaction should be decoded with separate calls to prepare and
* commit_prepared / rollback_prepared callbacks or wait till COMMIT PREPARED
* and sent as usual transaction .
*/
typedef bool (*LogicalDecodeFilterPrepareCB) (struct LogicalDecodingContext *ctx,
TransactionId xid,
const char *gid);
/*
* Callback called for every BEGIN of a prepared transaction .
*/
typedef void (*LogicalDecodeBeginPrepareCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn);
/*
* Called for PREPARE record unless it was filtered by filter_prepare ( )
* callback .
*/
typedef void (*LogicalDecodePrepareCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr prepare_lsn);
/*
* Called for COMMIT PREPARED .
*/
typedef void (*LogicalDecodeCommitPreparedCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr commit_lsn);
/*
* Called for ROLLBACK PREPARED .
*/
typedef void (*LogicalDecodeRollbackPreparedCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr prepare_end_lsn,
TimestampTz prepare_time);
/*
* Called when starting to stream a block of changes from in - progress
* transaction ( may be called repeatedly , if it ' s streamed in multiple
* chunks ) .
*/
typedef void (*LogicalDecodeStreamStartCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn);
/*
* Called when stopping to stream a block of changes from in - progress
* transaction to a remote node ( may be called repeatedly , if it ' s streamed
* in multiple chunks ) .
*/
typedef void (*LogicalDecodeStreamStopCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn);
/*
* Called to discard changes streamed to remote node from in - progress
* transaction .
*/
typedef void (*LogicalDecodeStreamAbortCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr abort_lsn);
/*
* Called to prepare changes streamed to remote node from in - progress
* transaction . This is called as part of a two - phase commit .
*/
typedef void (*LogicalDecodeStreamPrepareCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr prepare_lsn);
/*
* Called to apply changes streamed to remote node from in - progress
* transaction .
*/
typedef void (*LogicalDecodeStreamCommitCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr commit_lsn);
/*
* Callback for streaming individual changes from in - progress transactions .
*/
typedef void (*LogicalDecodeStreamChangeCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
Relation relation,
ReorderBufferChange *change);
/*
* Callback for streaming generic logical decoding messages from in - progress
* transactions .
*/
typedef void (*LogicalDecodeStreamMessageCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
XLogRecPtr message_lsn,
bool transactional,
const char *prefix,
Size message_size,
const char *message);
/*
* Callback for streaming truncates from in - progress transactions .
*/
typedef void (*LogicalDecodeStreamTruncateCB) (struct LogicalDecodingContext *ctx,
ReorderBufferTXN *txn,
int nrelations,
Relation relations[],
ReorderBufferChange *change);
/*
* Output plugin callbacks
*/
typedef struct OutputPluginCallbacks
{
LogicalDecodeStartupCB startup_cb;
LogicalDecodeBeginCB begin_cb;
LogicalDecodeChangeCB change_cb;
LogicalDecodeTruncateCB truncate_cb;
LogicalDecodeCommitCB commit_cb;
LogicalDecodeMessageCB message_cb;
LogicalDecodeFilterByOriginCB filter_by_origin_cb;
LogicalDecodeShutdownCB shutdown_cb;
/* streaming of changes at prepare time */
LogicalDecodeFilterPrepareCB filter_prepare_cb;
LogicalDecodeBeginPrepareCB begin_prepare_cb;
LogicalDecodePrepareCB prepare_cb;
LogicalDecodeCommitPreparedCB commit_prepared_cb;
LogicalDecodeRollbackPreparedCB rollback_prepared_cb;
/* streaming of changes */
LogicalDecodeStreamStartCB stream_start_cb;
LogicalDecodeStreamStopCB stream_stop_cb;
LogicalDecodeStreamAbortCB stream_abort_cb;
LogicalDecodeStreamPrepareCB stream_prepare_cb;
LogicalDecodeStreamCommitCB stream_commit_cb;
LogicalDecodeStreamChangeCB stream_change_cb;
LogicalDecodeStreamMessageCB stream_message_cb;
LogicalDecodeStreamTruncateCB stream_truncate_cb;
} OutputPluginCallbacks;
/* Functions in replication/logical/logical.c */
extern void OutputPluginPrepareWrite(struct LogicalDecodingContext *ctx, bool last_write);
extern void OutputPluginWrite(struct LogicalDecodingContext *ctx, bool last_write);
extern void OutputPluginUpdateProgress(struct LogicalDecodingContext *ctx, bool skipped_xact);
#endif /* OUTPUT_PLUGIN_H */
Messung V0.5 in Prozent C=93 H=99 G=95
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-08-08)
¤
*© Formatika GbR, Deutschland
2026-08-25
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