init

2026-04-07 13:35:22 +08:00
commit 0120fa9ce3
1530 changed files with 424864 additions and 0 deletions
--- a/db_include/replication/logical.h
+++ b/db_include/replication/logical.h
@@ -0,0 +1,134 @@
+/*-------------------------------------------------------------------------
+ * logical.h
+ *	   PostgreSQL logical decoding coordination
+ *
+ * Copyright (c) 2012-2021, PostgreSQL Global Development Group
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef LOGICAL_H
+#define LOGICAL_H
+
+#include "access/xlog.h"
+#include "access/xlogreader.h"
+#include "replication/output_plugin.h"
+#include "replication/slot.h"
+
+struct LogicalDecodingContext;
+
+typedef void (*LogicalOutputPluginWriterWrite) (struct LogicalDecodingContext *lr,
+												XLogRecPtr Ptr,
+												TransactionId xid,
+												bool last_write
+);
+
+typedef LogicalOutputPluginWriterWrite LogicalOutputPluginWriterPrepareWrite;
+
+typedef void (*LogicalOutputPluginWriterUpdateProgress) (struct LogicalDecodingContext *lr,
+														 XLogRecPtr Ptr,
+														 TransactionId xid
+);
+
+typedef struct LogicalDecodingContext
+{
+	/* memory context this is all allocated in */
+	MemoryContext context;
+
+	/* The associated replication slot */
+	ReplicationSlot *slot;
+
+	/* infrastructure pieces for decoding */
+	XLogReaderState *reader;
+	struct ReorderBuffer *reorder;
+	struct SnapBuild *snapshot_builder;
+
+	/*
+	 * Marks the logical decoding context as fast forward decoding one. Such a
+	 * context does not have plugin loaded so most of the following properties
+	 * are unused.
+	 */
+	bool		fast_forward;
+
+	OutputPluginCallbacks callbacks;
+	OutputPluginOptions options;
+
+	/*
+	 * User specified options
+	 */
+	List	   *output_plugin_options;
+
+	/*
+	 * User-Provided callback for writing/streaming out data.
+	 */
+	LogicalOutputPluginWriterPrepareWrite prepare_write;
+	LogicalOutputPluginWriterWrite write;
+	LogicalOutputPluginWriterUpdateProgress update_progress;
+
+	/*
+	 * Output buffer.
+	 */
+	StringInfo	out;
+
+	/*
+	 * Private data pointer of the output plugin.
+	 */
+	void	   *output_plugin_private;
+
+	/*
+	 * Private data pointer for the data writer.
+	 */
+	void	   *output_writer_private;
+
+	/*
+	 * Does the output plugin support streaming, and is it enabled?
+	 */
+	bool		streaming;
+
+	/*
+	 * Does the output plugin support two-phase decoding, and is it enabled?
+	 */
+	bool		twophase;
+
+	/*
+	 * State for writing output.
+	 */
+	bool		accept_writes;
+	bool		prepared_write;
+	XLogRecPtr	write_location;
+	TransactionId write_xid;
+} LogicalDecodingContext;
+
+
+extern void CheckLogicalDecodingRequirements(void);
+
+extern LogicalDecodingContext *CreateInitDecodingContext(const char *plugin,
+														 List *output_plugin_options,
+														 bool need_full_snapshot,
+														 XLogRecPtr restart_lsn,
+														 XLogReaderRoutine *xl_routine,
+														 LogicalOutputPluginWriterPrepareWrite prepare_write,
+														 LogicalOutputPluginWriterWrite do_write,
+														 LogicalOutputPluginWriterUpdateProgress update_progress);
+extern LogicalDecodingContext *CreateDecodingContext(XLogRecPtr start_lsn,
+													 List *output_plugin_options,
+													 bool fast_forward,
+													 XLogReaderRoutine *xl_routine,
+													 LogicalOutputPluginWriterPrepareWrite prepare_write,
+													 LogicalOutputPluginWriterWrite do_write,
+													 LogicalOutputPluginWriterUpdateProgress update_progress);
+extern void DecodingContextFindStartpoint(LogicalDecodingContext *ctx);
+extern bool DecodingContextReady(LogicalDecodingContext *ctx);
+extern void FreeDecodingContext(LogicalDecodingContext *ctx);
+
+extern void LogicalIncreaseXminForSlot(XLogRecPtr lsn, TransactionId xmin);
+extern void LogicalIncreaseRestartDecodingForSlot(XLogRecPtr current_lsn,
+												  XLogRecPtr restart_lsn);
+extern void LogicalConfirmReceivedLocation(XLogRecPtr lsn);
+
+extern bool filter_prepare_cb_wrapper(LogicalDecodingContext *ctx,
+									  TransactionId xid, const char *gid);
+extern bool filter_by_origin_cb_wrapper(LogicalDecodingContext *ctx, RepOriginId origin_id);
+extern void ResetLogicalStreamingState(void);
+extern void UpdateDecodingStats(LogicalDecodingContext *ctx);
+
+#endif