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6f58115ddd
Define a new function, GetCurrentTransactionStartTimeUsec() to get the time to this precision. Allow now() and timestamp 'now' to use this higher precision result so we now have fractional seconds in this "constant". Add timestamp without time zone type. Move previous timestamp type to timestamp with time zone. Accept another ISO variant for date/time values: yyyy-mm-ddThh:mm:ss (note the "T" separating the day from hours information). Remove 'current' from date/time types; convert to 'now' in input. Separate time and timetz regression tests. Separate timestamp and timestamptz regression test.
139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* xact.h
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* postgres transaction system definitions
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*
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*
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: xact.h,v 1.37 2001/09/28 08:09:12 thomas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef XACT_H
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#define XACT_H
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#include "access/transam.h"
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#include "access/xlog.h"
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#include "utils/nabstime.h"
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#include "utils/timestamp.h"
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/*
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* Xact isolation levels
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*/
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#define XACT_DIRTY_READ 0 /* not implemented */
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#define XACT_READ_COMMITTED 1
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#define XACT_REPEATABLE_READ 2 /* not implemented */
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#define XACT_SERIALIZABLE 3
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extern int DefaultXactIsoLevel;
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extern int XactIsoLevel;
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/* ----------------
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* transaction state structure
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* ----------------
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*/
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typedef struct TransactionStateData
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{
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TransactionId transactionIdData;
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CommandId commandId;
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CommandId scanCommandId;
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AbsoluteTime startTime;
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int startTimeMsec;
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int state;
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int blockState;
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} TransactionStateData;
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typedef TransactionStateData *TransactionState;
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/* ----------------
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* transaction states
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* ----------------
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*/
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#define TRANS_DEFAULT 0
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#define TRANS_START 1
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#define TRANS_INPROGRESS 2
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#define TRANS_COMMIT 3
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#define TRANS_ABORT 4
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/* ----------------
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* transaction block states
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* ----------------
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*/
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#define TBLOCK_DEFAULT 0
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#define TBLOCK_BEGIN 1
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#define TBLOCK_INPROGRESS 2
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#define TBLOCK_END 3
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#define TBLOCK_ABORT 4
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#define TBLOCK_ENDABORT 5
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/*
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* XLOG allows to store some information in high 4 bits of log
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* record xl_info field
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*/
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#define XLOG_XACT_COMMIT 0x00
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#define XLOG_XACT_ABORT 0x20
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typedef struct xl_xact_commit
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{
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time_t xtime;
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/*
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* Array of RelFileNode-s to drop may follow at the end of struct
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*/
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} xl_xact_commit;
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#define SizeOfXactCommit ((offsetof(xl_xact_commit, xtime) + sizeof(time_t)))
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typedef struct xl_xact_abort
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{
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time_t xtime;
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} xl_xact_abort;
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#define SizeOfXactAbort ((offsetof(xl_xact_abort, xtime) + sizeof(time_t)))
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/* ----------------
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* extern definitions
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* ----------------
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*/
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extern int TransactionFlushEnabled(void);
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extern void SetTransactionFlushEnabled(bool state);
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extern bool IsAbortedTransactionBlockState(void);
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extern TransactionId GetCurrentTransactionId(void);
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extern CommandId GetCurrentCommandId(void);
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extern CommandId GetScanCommandId(void);
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extern void SetScanCommandId(CommandId);
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extern AbsoluteTime GetCurrentTransactionStartTime(void);
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extern AbsoluteTime GetCurrentTransactionStartTimeUsec(int *usec);
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extern bool TransactionIdIsCurrentTransactionId(TransactionId xid);
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extern bool CommandIdIsCurrentCommandId(CommandId cid);
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extern bool CommandIdGEScanCommandId(CommandId cid);
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extern void CommandCounterIncrement(void);
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extern void StartTransactionCommand(void);
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extern void CommitTransactionCommand(void);
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extern void AbortCurrentTransaction(void);
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extern void BeginTransactionBlock(void);
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extern void EndTransactionBlock(void);
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extern bool IsTransactionBlock(void);
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extern void UserAbortTransactionBlock(void);
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extern void AbortOutOfAnyTransaction(void);
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extern void RecordTransactionCommit(void);
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extern void XactPushRollback(void (*func) (void *), void *data);
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extern void XactPopRollback(void);
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extern void xact_redo(XLogRecPtr lsn, XLogRecord *record);
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extern void xact_undo(XLogRecPtr lsn, XLogRecord *record);
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extern void xact_desc(char *buf, uint8 xl_info, char *rec);
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/* defined in xid.c */
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extern Datum xidin(PG_FUNCTION_ARGS);
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extern Datum xidout(PG_FUNCTION_ARGS);
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extern Datum xideq(PG_FUNCTION_ARGS);
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extern Datum xid_age(PG_FUNCTION_ARGS);
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#endif /* XACT_H */
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