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/* * commit_ts.h * * PostgreSQL commit timestamp manager * * Portions Copyright (c) 1996-2016, 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 "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, bool write_xlog); 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 xlrecvalue, bool pgcontrolvalue); extern void CompleteCommitTsInitialization(void); extern void ShutdownCommitTs(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); /* XLOG stuff */ #define COMMIT_TS_ZEROPAGE 0x00 #define COMMIT_TS_TRUNCATE 0x10 #define COMMIT_TS_SETTS 0x20 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)) 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 */