init

db_include/access/commit_ts.h

@@ -0,0 +1,78 @@
+/*
+ * commit_ts.h
+ *
+ * PostgreSQL commit timestamp manager
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/access/commit_ts.h
+ */
+#ifndef COMMIT_TS_H
+#define COMMIT_TS_H
+
+#include "access/xlog.h"
+#include "datatype/timestamp.h"
+#include "replication/origin.h"
+#include "storage/sync.h"
+#include "utils/guc.h"
+
+
+extern PGDLLIMPORT bool track_commit_timestamp;
+
+extern bool check_track_commit_timestamp(bool *newval, void **extra,
+										 GucSource source);
+
+extern void TransactionTreeSetCommitTsData(TransactionId xid, int nsubxids,
+										   TransactionId *subxids, TimestampTz timestamp,
+										   RepOriginId nodeid);
+extern bool TransactionIdGetCommitTsData(TransactionId xid,
+										 TimestampTz *ts, RepOriginId *nodeid);
+extern TransactionId GetLatestCommitTsData(TimestampTz *ts,
+										   RepOriginId *nodeid);
+
+extern Size CommitTsShmemBuffers(void);
+extern Size CommitTsShmemSize(void);
+extern void CommitTsShmemInit(void);
+extern void BootStrapCommitTs(void);
+extern void StartupCommitTs(void);
+extern void CommitTsParameterChange(bool newvalue, bool oldvalue);
+extern void CompleteCommitTsInitialization(void);
+extern void CheckPointCommitTs(void);
+extern void ExtendCommitTs(TransactionId newestXact);
+extern void TruncateCommitTs(TransactionId oldestXact);
+extern void SetCommitTsLimit(TransactionId oldestXact,
+							 TransactionId newestXact);
+extern void AdvanceOldestCommitTsXid(TransactionId oldestXact);
+
+extern int	committssyncfiletag(const FileTag *ftag, char *path);
+
+/* XLOG stuff */
+#define COMMIT_TS_ZEROPAGE		0x00
+#define COMMIT_TS_TRUNCATE		0x10
+
+typedef struct xl_commit_ts_set
+{
+	TimestampTz timestamp;
+	RepOriginId nodeid;
+	TransactionId mainxid;
+	/* subxact Xids follow */
+}			xl_commit_ts_set;
+
+#define SizeOfCommitTsSet	(offsetof(xl_commit_ts_set, mainxid) + \
+							 sizeof(TransactionId))
+
+typedef struct xl_commit_ts_truncate
+{
+	int			pageno;
+	TransactionId oldestXid;
+} xl_commit_ts_truncate;
+
+#define SizeOfCommitTsTruncate	(offsetof(xl_commit_ts_truncate, oldestXid) + \
+								 sizeof(TransactionId))
+
+extern void commit_ts_redo(XLogReaderState *record);
+extern void commit_ts_desc(StringInfo buf, XLogReaderState *record);
+extern const char *commit_ts_identify(uint8 info);
+
+#endif							/* COMMIT_TS_H */