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122 lines
3.6 KiB
122 lines
3.6 KiB
/*-------------------------------------------------------------------------
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* output_plugin.h
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* PostgreSQL Logical Decode Plugin Interface
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*
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* Copyright (c) 2012-2019, PostgreSQL Global Development Group
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef OUTPUT_PLUGIN_H
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#define OUTPUT_PLUGIN_H
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#include "replication/reorderbuffer.h"
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struct LogicalDecodingContext;
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struct OutputPluginCallbacks;
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typedef enum OutputPluginOutputType
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{
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OUTPUT_PLUGIN_BINARY_OUTPUT,
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OUTPUT_PLUGIN_TEXTUAL_OUTPUT
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} OutputPluginOutputType;
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/*
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* Options set by the output plugin, in the startup callback.
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*/
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typedef struct OutputPluginOptions
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{
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OutputPluginOutputType output_type;
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bool receive_rewrites;
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} OutputPluginOptions;
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/*
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* Type of the shared library symbol _PG_output_plugin_init that is looked up
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* when loading an output plugin shared library.
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*/
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typedef void (*LogicalOutputPluginInit) (struct OutputPluginCallbacks *cb);
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/*
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* Callback that gets called in a user-defined plugin. ctx->private_data can
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* be set to some private data.
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*
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* "is_init" will be set to "true" if the decoding slot just got defined. When
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* the same slot is used from there one, it will be "false".
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*/
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typedef void (*LogicalDecodeStartupCB) (struct LogicalDecodingContext *ctx,
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OutputPluginOptions *options,
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bool is_init);
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/*
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* Callback called for every (explicit or implicit) BEGIN of a successful
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* transaction.
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*/
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typedef void (*LogicalDecodeBeginCB) (struct LogicalDecodingContext *ctx,
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ReorderBufferTXN *txn);
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/*
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* Callback for every individual change in a successful transaction.
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*/
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typedef void (*LogicalDecodeChangeCB) (struct LogicalDecodingContext *ctx,
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ReorderBufferTXN *txn,
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Relation relation,
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ReorderBufferChange *change);
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/*
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* Callback for every TRUNCATE in a successful transaction.
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*/
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typedef void (*LogicalDecodeTruncateCB) (struct LogicalDecodingContext *ctx,
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ReorderBufferTXN *txn,
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int nrelations,
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Relation relations[],
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ReorderBufferChange *change);
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/*
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* Called for every (explicit or implicit) COMMIT of a successful transaction.
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*/
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typedef void (*LogicalDecodeCommitCB) (struct LogicalDecodingContext *ctx,
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ReorderBufferTXN *txn,
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XLogRecPtr commit_lsn);
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/*
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* Called for the generic logical decoding messages.
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*/
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typedef void (*LogicalDecodeMessageCB) (struct LogicalDecodingContext *ctx,
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ReorderBufferTXN *txn,
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XLogRecPtr message_lsn,
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bool transactional,
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const char *prefix,
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Size message_size,
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const char *message);
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/*
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* Filter changes by origin.
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*/
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typedef bool (*LogicalDecodeFilterByOriginCB) (struct LogicalDecodingContext *ctx,
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RepOriginId origin_id);
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/*
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* Called to shutdown an output plugin.
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*/
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typedef void (*LogicalDecodeShutdownCB) (struct LogicalDecodingContext *ctx);
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/*
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* Output plugin callbacks
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*/
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typedef struct OutputPluginCallbacks
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{
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LogicalDecodeStartupCB startup_cb;
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LogicalDecodeBeginCB begin_cb;
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LogicalDecodeChangeCB change_cb;
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LogicalDecodeTruncateCB truncate_cb;
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LogicalDecodeCommitCB commit_cb;
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LogicalDecodeMessageCB message_cb;
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LogicalDecodeFilterByOriginCB filter_by_origin_cb;
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LogicalDecodeShutdownCB shutdown_cb;
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} OutputPluginCallbacks;
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/* Functions in replication/logical/logical.c */
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extern void OutputPluginPrepareWrite(struct LogicalDecodingContext *ctx, bool last_write);
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extern void OutputPluginWrite(struct LogicalDecodingContext *ctx, bool last_write);
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extern void OutputPluginUpdateProgress(struct LogicalDecodingContext *ctx);
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#endif /* OUTPUT_PLUGIN_H */
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