timestamp.h File Reference

#include "datatype/timestamp.h"
#include "fmgr.h"
#include "pgtime.h"

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Macros
#define	PG_GETARG_TIMESTAMP(n)   DatumGetTimestamp(PG_GETARG_DATUM(n))
#define	PG_GETARG_TIMESTAMPTZ(n)   DatumGetTimestampTz(PG_GETARG_DATUM(n))
#define	PG_GETARG_INTERVAL_P(n)   DatumGetIntervalP(PG_GETARG_DATUM(n))
#define	PG_RETURN_TIMESTAMP(x)   return TimestampGetDatum(x)
#define	PG_RETURN_TIMESTAMPTZ(x)   return TimestampTzGetDatum(x)
#define	PG_RETURN_INTERVAL_P(x)   return IntervalPGetDatum(x)
#define	TIMESTAMP_MASK(b)   (1 << (b))
#define	INTERVAL_MASK(b)   (1 << (b))
#define	INTERVAL_FULL_RANGE   (0x7FFF)
#define	INTERVAL_RANGE_MASK   (0x7FFF)
#define	INTERVAL_FULL_PRECISION   (0xFFFF)
#define	INTERVAL_PRECISION_MASK   (0xFFFF)
#define	INTERVAL_TYPMOD(p, r)   ((((r) & INTERVAL_RANGE_MASK) << 16) | ((p) & INTERVAL_PRECISION_MASK))
#define	INTERVAL_PRECISION(t)   ((t) & INTERVAL_PRECISION_MASK)
#define	INTERVAL_RANGE(t)   (((t) >> 16) & INTERVAL_RANGE_MASK)
#define	TimestampTzPlusMilliseconds(tz, ms)   ((tz) + ((ms) * (int64) 1000))
#define	TimestampTzPlusSeconds(tz, s)   ((tz) + ((s) * (int64) 1000000))
#define	timestamptz_cmp_internal(dt1, dt2)   timestamp_cmp_internal(dt1, dt2)

Functions
static Timestamp	DatumGetTimestamp (Datum X)
static TimestampTz	DatumGetTimestampTz (Datum X)
static Interval *	DatumGetIntervalP (Datum X)
static Datum	TimestampGetDatum (Timestamp X)
static Datum	TimestampTzGetDatum (TimestampTz X)
static Datum	IntervalPGetDatum (const Interval *X)
TimestampTz	GetCurrentTimestamp (void)
void	TimestampDifference (TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
long	TimestampDifferenceMilliseconds (TimestampTz start_time, TimestampTz stop_time)
bool	TimestampDifferenceExceeds (TimestampTz start_time, TimestampTz stop_time, int msec)
TimestampTz	time_t_to_timestamptz (pg_time_t tm)
pg_time_t	timestamptz_to_time_t (TimestampTz t)
const char *	timestamptz_to_str (TimestampTz t)
int	tm2timestamp (struct pg_tm *tm, fsec_t fsec, int *tzp, Timestamp *result)
int	timestamp2tm (Timestamp dt, int *tzp, struct pg_tm *tm, fsec_t *fsec, const char **tzn, pg_tz *attimezone)
void	dt2time (Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec)
void	interval2itm (Interval span, struct pg_itm *itm)
int	itm2interval (struct pg_itm *itm, Interval *span)
int	itmin2interval (struct pg_itm_in *itm_in, Interval *span)
Timestamp	SetEpochTimestamp (void)
void	GetEpochTime (struct pg_tm *tm)
int	timestamp_cmp_internal (Timestamp dt1, Timestamp dt2)
TimestampTz	timestamp2timestamptz_opt_overflow (Timestamp timestamp, int *overflow)
int32	timestamp_cmp_timestamptz_internal (Timestamp timestampVal, TimestampTz dt2)
int	isoweek2j (int year, int week)
void	isoweek2date (int woy, int *year, int *mon, int *mday)
void	isoweekdate2date (int isoweek, int wday, int *year, int *mon, int *mday)
int	date2isoweek (int year, int mon, int mday)
int	date2isoyear (int year, int mon, int mday)
int	date2isoyearday (int year, int mon, int mday)
bool	TimestampTimestampTzRequiresRewrite (void)

Variables
PGDLLIMPORT TimestampTz	PgStartTime
PGDLLIMPORT TimestampTz	PgReloadTime

Macro Definition Documentation

INTERVAL_FULL_PRECISION

#define INTERVAL_FULL_PRECISION   (0xFFFF)

Definition at line 78 of file timestamp.h.

INTERVAL_FULL_RANGE

#define INTERVAL_FULL_RANGE   (0x7FFF)

Definition at line 76 of file timestamp.h.

INTERVAL_MASK

#define INTERVAL_MASK

(

b

)

(1 << (b))

Definition at line 73 of file timestamp.h.

INTERVAL_PRECISION

#define INTERVAL_PRECISION

(

t

)

((t) & INTERVAL_PRECISION_MASK)

Definition at line 81 of file timestamp.h.

INTERVAL_PRECISION_MASK

#define INTERVAL_PRECISION_MASK   (0xFFFF)

Definition at line 79 of file timestamp.h.

INTERVAL_RANGE

#define INTERVAL_RANGE

(

t

)

(((t) >> 16) & INTERVAL_RANGE_MASK)

Definition at line 82 of file timestamp.h.

INTERVAL_RANGE_MASK

#define INTERVAL_RANGE_MASK   (0x7FFF)

Definition at line 77 of file timestamp.h.

INTERVAL_TYPMOD

#define INTERVAL_TYPMOD	(		p,
			r
	)		((((r) & INTERVAL_RANGE_MASK) << 16) | ((p) & INTERVAL_PRECISION_MASK))

Definition at line 80 of file timestamp.h.

PG_GETARG_INTERVAL_P

#define PG_GETARG_INTERVAL_P

(

n

)

DatumGetIntervalP(PG_GETARG_DATUM(n))

Definition at line 65 of file timestamp.h.

PG_GETARG_TIMESTAMP

#define PG_GETARG_TIMESTAMP

(

n

)

DatumGetTimestamp(PG_GETARG_DATUM(n))

Definition at line 63 of file timestamp.h.

PG_GETARG_TIMESTAMPTZ

#define PG_GETARG_TIMESTAMPTZ

(

n

)

DatumGetTimestampTz(PG_GETARG_DATUM(n))

Definition at line 64 of file timestamp.h.

PG_RETURN_INTERVAL_P

#define PG_RETURN_INTERVAL_P

(

x

)

return IntervalPGetDatum(x)

Definition at line 69 of file timestamp.h.

PG_RETURN_TIMESTAMP

#define PG_RETURN_TIMESTAMP

(

x

)

return TimestampGetDatum(x)

Definition at line 67 of file timestamp.h.

PG_RETURN_TIMESTAMPTZ

#define PG_RETURN_TIMESTAMPTZ

(

x

)

return TimestampTzGetDatum(x)

Definition at line 68 of file timestamp.h.

TIMESTAMP_MASK

#define TIMESTAMP_MASK

(

b

)

(1 << (b))

Definition at line 72 of file timestamp.h.

timestamptz_cmp_internal

#define timestamptz_cmp_internal	(		dt1,
			dt2
	)		timestamp_cmp_internal(dt1, dt2)

Definition at line 127 of file timestamp.h.

TimestampTzPlusMilliseconds

#define TimestampTzPlusMilliseconds	(		tz,
			ms
	)		((tz) + ((ms) * (int64) 1000))

Definition at line 85 of file timestamp.h.

TimestampTzPlusSeconds

#define TimestampTzPlusSeconds	(		tz,
			s
	)		((tz) + ((s) * (int64) 1000000))

Definition at line 86 of file timestamp.h.

Function Documentation

date2isoweek()

int date2isoweek	(	int	year,
		int	mon,
		int	mday
	)

Definition at line 4518 of file timestamp.c.

{
    float8      result;
    int         day0,
                day4,
                dayn;
 
    /* current day */
    dayn = date2j(year, mon, mday);
 
    /* fourth day of current year */
    day4 = date2j(year, 1, 4);
 
    /* day0 == offset to first day of week (Monday) */
    day0 = j2day(day4 - 1);
 
    /*
     * We need the first week containing a Thursday, otherwise this day falls
     * into the previous year for purposes of counting weeks
     */
    if (dayn < day4 - day0)
    {
        day4 = date2j(year - 1, 1, 4);
 
        /* day0 == offset to first day of week (Monday) */
        day0 = j2day(day4 - 1);
    }
 
    result = (dayn - (day4 - day0)) / 7 + 1;
 
    /*
     * Sometimes the last few days in a year will fall into the first week of
     * the next year, so check for this.
     */
    if (result >= 52)
    {
        day4 = date2j(year + 1, 1, 4);
 
        /* day0 == offset to first day of week (Monday) */
        day0 = j2day(day4 - 1);
 
        if (dayn >= day4 - day0)
            result = (dayn - (day4 - day0)) / 7 + 1;
    }
 
    return (int) result;
}

References date2j(), and j2day().

Referenced by DCH_to_char(), extract_date(), timestamp_part_common(), timestamp_trunc(), timestamptz_part_common(), and timestamptz_trunc_internal().

date2isoyear()

int date2isoyear	(	int	year,
		int	mon,
		int	mday
	)

Definition at line 4573 of file timestamp.c.

{
    float8      result;
    int         day0,
                day4,
                dayn;
 
    /* current day */
    dayn = date2j(year, mon, mday);
 
    /* fourth day of current year */
    day4 = date2j(year, 1, 4);
 
    /* day0 == offset to first day of week (Monday) */
    day0 = j2day(day4 - 1);
 
    /*
     * We need the first week containing a Thursday, otherwise this day falls
     * into the previous year for purposes of counting weeks
     */
    if (dayn < day4 - day0)
    {
        day4 = date2j(year - 1, 1, 4);
 
        /* day0 == offset to first day of week (Monday) */
        day0 = j2day(day4 - 1);
 
        year--;
    }
 
    result = (dayn - (day4 - day0)) / 7 + 1;
 
    /*
     * Sometimes the last few days in a year will fall into the first week of
     * the next year, so check for this.
     */
    if (result >= 52)
    {
        day4 = date2j(year + 1, 1, 4);
 
        /* day0 == offset to first day of week (Monday) */
        day0 = j2day(day4 - 1);
 
        if (dayn >= day4 - day0)
            year++;
    }
 
    return year;
}

References date2j(), and j2day().

Referenced by date2isoyearday(), DCH_to_char(), extract_date(), timestamp_part_common(), and timestamptz_part_common().

date2isoyearday()

int date2isoyearday	(	int	year,
		int	mon,
		int	mday
	)

Definition at line 4630 of file timestamp.c.

{
    return date2j(year, mon, mday) - isoweek2j(date2isoyear(year, mon, mday), 1) + 1;
}

References date2isoyear(), date2j(), and isoweek2j().

Referenced by DCH_to_char().

DatumGetIntervalP()

static Interval* DatumGetIntervalP ( Datum  X )

inlinestatic

Definition at line 40 of file timestamp.h.

{
    return (Interval *) DatumGetPointer(X);
}

References DatumGetPointer().

Referenced by abs_interval(), check_timezone(), convert_timevalue_to_scalar(), gbt_intv_compress(), gbt_time_dist(), gbt_time_penalty(), gbt_ts_dist(), in_range_interval_interval(), interval_accum(), interval_accum_inv(), interval_avg(), interval_combine(), interval_dist(), time_dist(), timestamp_mi(), ts_dist(), and tstz_dist().

DatumGetTimestamp()

static Timestamp DatumGetTimestamp ( Datum  X )

inlinestatic

Definition at line 28 of file timestamp.h.

{
    return (Timestamp) DatumGetInt64(X);
}

References DatumGetInt64().

Referenced by compareDatetime(), convert_timevalue_to_scalar(), gbt_num_compress(), generate_series_timestamp(), in_range_timestamp_interval(), JsonEncodeDateTime(), map_sql_value_to_xml_value(), and timestamp_fastcmp().

DatumGetTimestampTz()

static TimestampTz DatumGetTimestampTz ( Datum  X )

inlinestatic

Definition at line 34 of file timestamp.h.

{
    return (TimestampTz) DatumGetInt64(X);
}

References DatumGetInt64().

Referenced by compareDatetime(), convert_timevalue_to_scalar(), gbt_tstz_compress(), get_role_password(), JsonEncodeDateTime(), and validateRecoveryParameters().

dt2time()

void dt2time	(	Timestamp	jd,
		int *	hour,
		int *	min,
		int *	sec,
		fsec_t *	fsec
	)

Definition at line 1811 of file timestamp.c.

{
    TimeOffset  time;
 
    time = jd;
 
    *hour = time / USECS_PER_HOUR;
    time -= (*hour) * USECS_PER_HOUR;
    *min = time / USECS_PER_MINUTE;
    time -= (*min) * USECS_PER_MINUTE;
    *sec = time / USECS_PER_SEC;
    *fsec = time - (*sec * USECS_PER_SEC);
}                               /* dt2time() */

References USECS_PER_HOUR, USECS_PER_MINUTE, and USECS_PER_SEC.

Referenced by DecodeDateTime(), DecodeTimeOnly(), and timestamp2tm().

GetCurrentTimestamp()

TimestampTz GetCurrentTimestamp

(

void

)

Definition at line 1582 of file timestamp.c.

{
    TimestampTz result;
    struct timeval tp;
 
    gettimeofday(&tp, NULL);
 
    result = (TimestampTz) tp.tv_sec -
        ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY);
    result = (result * USECS_PER_SEC) + tp.tv_usec;
 
    return result;
}

References gettimeofday(), POSTGRES_EPOCH_JDATE, SECS_PER_DAY, UNIX_EPOCH_JDATE, and USECS_PER_SEC.

Referenced by ApplyLauncherMain(), ApplyWorkerMain(), asyncQueueFillWarning(), autoprewarm_main(), AutoVacLauncherMain(), BackgroundWriterMain(), bbsink_copystream_archive_contents(), bbsink_copystream_end_archive(), bbsink_copystream_new(), bbsink_throttle_begin_backup(), check_log_duration(), CheckPointGuts(), CleanupBackgroundWorker(), clock_timestamp(), CreateCheckPoint(), CreateEndOfRecoveryRecord(), CreateOverwriteContrecordRecord(), CreateRestartPoint(), DetermineSleepTime(), disable_timeout(), disable_timeouts(), do_analyze_rel(), do_start_bgworker(), do_start_worker(), enable_startup_progress_timeout(), enable_timeout_after(), enable_timeout_at(), enable_timeout_every(), enable_timeouts(), entry_reset(), get_role_password(), GetCurrentTransactionStopTimestamp(), GetReplicationApplyDelay(), GetSnapshotCurrentTimestamp(), handle_sig_alarm(), has_startup_progress_timeout_expired(), heap_vacuum_rel(), initialize_drandom_seed(), InitProcessGlobals(), KnownAssignedXidsCompress(), launcher_determine_sleep(), LockBufferForCleanup(), log_disconnections(), LogCheckpointEnd(), logicalrep_worker_launch(), LogicalRepApplyLoop(), maybe_start_bgworkers(), pa_send_data(), PerformWalRecovery(), pgfdw_cancel_query(), pgfdw_exec_cleanup_query(), pgfdw_get_cleanup_result(), pgss_shmem_startup(), pgstat_build_snapshot(), pgstat_report_activity(), pgstat_report_analyze(), pgstat_report_archiver(), pgstat_report_autovac(), pgstat_report_checksum_failures_in_db(), pgstat_report_vacuum(), pgstat_reset(), pgstat_reset_after_failure(), pgstat_reset_counters(), pgstat_reset_of_kind(), pgstat_reset_slru(), PostgresSingleUserMain(), PostmasterMain(), PrepareTransaction(), process_syncing_tables_for_apply(), ProcessConfigFileInternal(), ProcessPendingWrites(), ProcessRepliesIfAny(), ProcessStandbyReplyMessage(), ProcessWalSndrMessage(), ProcSleep(), rebuild_database_list(), RecordTransactionAbort(), RecordTransactionAbortPrepared(), RecordTransactionCommitPrepared(), recoveryApplyDelay(), reschedule_timeouts(), ResolveRecoveryConflictWithBufferPin(), ResolveRecoveryConflictWithLock(), ResolveRecoveryConflictWithVirtualXIDs(), send_feedback(), SetCurrentStatementStartTimestamp(), StartTransaction(), test_pattern(), throttle(), UpdateWorkerStats(), WaitExceedsMaxStandbyDelay(), WaitForWALToBecomeAvailable(), WalReceiverMain(), WalSndKeepalive(), WalSndLoop(), WalSndUpdateProgress(), WalSndWaitForWal(), WalSndWriteData(), XLogBackgroundFlush(), XLogFileRead(), XLogPrefetchResetStats(), XLogPrefetchShmemInit(), XLogRestorePoint(), XLogSendPhysical(), XLogWalRcvSendHSFeedback(), and XLogWalRcvSendReply().

GetEpochTime()

void GetEpochTime

(

struct pg_tm *

tm

)

Definition at line 2091 of file timestamp.c.

{
    struct pg_tm *t0;
    pg_time_t   epoch = 0;
 
    t0 = pg_gmtime(&epoch);
 
    if (t0 == NULL)
        elog(ERROR, "could not convert epoch to timestamp: %m");
 
    tm->tm_year = t0->tm_year;
    tm->tm_mon = t0->tm_mon;
    tm->tm_mday = t0->tm_mday;
    tm->tm_hour = t0->tm_hour;
    tm->tm_min = t0->tm_min;
    tm->tm_sec = t0->tm_sec;
 
    tm->tm_year += 1900;
    tm->tm_mon++;
}

References elog(), epoch, ERROR, pg_gmtime(), tm, pg_tm::tm_hour, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, and pg_tm::tm_year.

Referenced by date_in(), PGTYPESdate_from_asc(), and SetEpochTimestamp().

interval2itm()

void interval2itm	(	Interval	span,
		struct pg_itm *	itm
	)

Definition at line 1984 of file timestamp.c.

{
    TimeOffset  time;
    TimeOffset  tfrac;
 
    itm->tm_year = span.month / MONTHS_PER_YEAR;
    itm->tm_mon = span.month % MONTHS_PER_YEAR;
    itm->tm_mday = span.day;
    time = span.time;
 
    tfrac = time / USECS_PER_HOUR;
    time -= tfrac * USECS_PER_HOUR;
    itm->tm_hour = tfrac;
    tfrac = time / USECS_PER_MINUTE;
    time -= tfrac * USECS_PER_MINUTE;
    itm->tm_min = (int) tfrac;
    tfrac = time / USECS_PER_SEC;
    time -= tfrac * USECS_PER_SEC;
    itm->tm_sec = (int) tfrac;
    itm->tm_usec = (int) time;
}

References Interval::day, Interval::month, MONTHS_PER_YEAR, Interval::time, pg_itm::tm_hour, pg_itm::tm_mday, pg_itm::tm_min, pg_itm::tm_mon, pg_itm::tm_sec, pg_itm::tm_usec, pg_itm::tm_year, USECS_PER_HOUR, USECS_PER_MINUTE, and USECS_PER_SEC.

Referenced by interval_out(), interval_part_common(), interval_to_char(), and interval_trunc().

IntervalPGetDatum()

static Datum IntervalPGetDatum ( const Interval *  X )

inlinestatic

Definition at line 58 of file timestamp.h.

{
    return PointerGetDatum(X);
}

References PointerGetDatum().

Referenced by abs_interval(), gbt_intveq(), gbt_intvge(), gbt_intvgt(), gbt_intvkey_cmp(), gbt_intvle(), gbt_intvlt(), in_range_date_interval(), in_range_interval_interval(), in_range_timestamp_interval(), interval_accum(), interval_accum_inv(), interval_avg(), interval_combine(), leftmostvalue_interval(), pg_stat_get_wal_senders(), pg_timezone_abbrevs(), and timestamp_mi().

isoweek2date()

void isoweek2date	(	int	woy,
		int *	year,
		int *	mon,
		int *	mday
	)

Definition at line 4487 of file timestamp.c.

{
    j2date(isoweek2j(*year, woy), year, mon, mday);
}

References isoweek2j(), and j2date().

Referenced by do_to_timestamp(), timestamp_trunc(), and timestamptz_trunc_internal().

isoweek2j()

int isoweek2j	(	int	year,
		int	week
	)

Definition at line 4467 of file timestamp.c.

{
    int         day0,
                day4;
 
    /* fourth day of current year */
    day4 = date2j(year, 1, 4);
 
    /* day0 == offset to first day of week (Monday) */
    day0 = j2day(day4 - 1);
 
    return ((week - 1) * 7) + (day4 - day0);
}

References date2j(), and j2day().

Referenced by date2isoyearday(), do_to_timestamp(), isoweek2date(), and isoweekdate2date().

isoweekdate2date()

void isoweekdate2date	(	int	isoweek,
		int	wday,
		int *	year,
		int *	mon,
		int *	mday
	)

Definition at line 4500 of file timestamp.c.

{
    int         jday;
 
    jday = isoweek2j(*year, isoweek);
    /* convert Gregorian week start (Sunday=1) to ISO week start (Monday=1) */
    if (wday > 1)
        jday += wday - 2;
    else
        jday += 6;
    j2date(jday, year, mon, mday);
}

References isoweek2j(), and j2date().

Referenced by do_to_timestamp().

itm2interval()

int itm2interval	(	struct pg_itm *	itm,
		Interval *	span
	)

Definition at line 2011 of file timestamp.c.

{
    int64       total_months = (int64) itm->tm_year * MONTHS_PER_YEAR + itm->tm_mon;
 
    if (total_months > INT_MAX || total_months < INT_MIN)
        return -1;
    span->month = (int32) total_months;
    span->day = itm->tm_mday;
    if (pg_mul_s64_overflow(itm->tm_hour, USECS_PER_HOUR,
                            &span->time))
        return -1;
    /* tm_min, tm_sec are 32 bits, so intermediate products can't overflow */
    if (pg_add_s64_overflow(span->time, itm->tm_min * USECS_PER_MINUTE,
                            &span->time))
        return -1;
    if (pg_add_s64_overflow(span->time, itm->tm_sec * USECS_PER_SEC,
                            &span->time))
        return -1;
    if (pg_add_s64_overflow(span->time, itm->tm_usec,
                            &span->time))
        return -1;
    return 0;
}

References Interval::day, if(), Interval::month, MONTHS_PER_YEAR, pg_add_s64_overflow(), pg_mul_s64_overflow(), Interval::time, pg_itm::tm_hour, pg_itm::tm_mday, pg_itm::tm_min, pg_itm::tm_mon, pg_itm::tm_sec, pg_itm::tm_usec, pg_itm::tm_year, USECS_PER_HOUR, USECS_PER_MINUTE, and USECS_PER_SEC.

Referenced by interval_trunc(), timestamp_age(), and timestamptz_age().

itmin2interval()

int itmin2interval	(	struct pg_itm_in *	itm_in,
		Interval *	span
	)

Definition at line 2040 of file timestamp.c.

{
    int64       total_months = (int64) itm_in->tm_year * MONTHS_PER_YEAR + itm_in->tm_mon;
 
    if (total_months > INT_MAX || total_months < INT_MIN)
        return -1;
    span->month = (int32) total_months;
    span->day = itm_in->tm_mday;
    span->time = itm_in->tm_usec;
    return 0;
}

References Interval::day, if(), Interval::month, MONTHS_PER_YEAR, Interval::time, pg_itm_in::tm_mday, pg_itm_in::tm_mon, pg_itm_in::tm_usec, and pg_itm_in::tm_year.

Referenced by interval_in(), and pg_timezone_abbrevs().

SetEpochTimestamp()

Timestamp SetEpochTimestamp

(

void

)

Definition at line 2113 of file timestamp.c.

{
    Timestamp   dt;
    struct pg_tm tt,
               *tm = &tt;
 
    GetEpochTime(tm);
    /* we don't bother to test for failure ... */
    tm2timestamp(tm, 0, NULL, &dt);
 
    return dt;
}                               /* SetEpochTimestamp() */

References GetEpochTime(), tm, and tm2timestamp().

Referenced by dttofmtasc_replace(), PGTYPEStimestamp_from_asc(), timestamp_in(), timestamp_part_common(), timestamptz_in(), and timestamptz_part_common().

time_t_to_timestamptz()

TimestampTz time_t_to_timestamptz

(

pg_time_t

tm

)

Definition at line 1748 of file timestamp.c.

{
    TimestampTz result;
 
    result = (TimestampTz) tm -
        ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY);
    result *= USECS_PER_SEC;
 
    return result;
}

References POSTGRES_EPOCH_JDATE, SECS_PER_DAY, tm, UNIX_EPOCH_JDATE, and USECS_PER_SEC.

Referenced by pg_control_checkpoint(), pg_control_system(), pg_ls_dir_files(), and pg_stat_file().

timestamp2timestamptz_opt_overflow()

TimestampTz timestamp2timestamptz_opt_overflow	(	Timestamp	timestamp,
		int *	overflow
	)

Definition at line 5569 of file timestamp.c.

{
    TimestampTz result;
    struct pg_tm tt,
               *tm = &tt;
    fsec_t      fsec;
    int         tz;
 
    if (overflow)
        *overflow = 0;
 
    if (TIMESTAMP_NOT_FINITE(timestamp))
        return timestamp;
 
    /* We don't expect this to fail, but check it pro forma */
    if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
    {
        tz = DetermineTimeZoneOffset(tm, session_timezone);
 
        result = dt2local(timestamp, -tz);
 
        if (IS_VALID_TIMESTAMP(result))
        {
            return result;
        }
        else if (overflow)
        {
            if (result < MIN_TIMESTAMP)
            {
                *overflow = -1;
                TIMESTAMP_NOBEGIN(result);
            }
            else
            {
                *overflow = 1;
                TIMESTAMP_NOEND(result);
            }
            return result;
        }
    }
 
    ereport(ERROR,
            (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
             errmsg("timestamp out of range")));
 
    return 0;
}

References DetermineTimeZoneOffset(), dt2local(), ereport, errcode(), errmsg(), ERROR, IS_VALID_TIMESTAMP, MIN_TIMESTAMP, session_timezone, timestamp2tm(), TIMESTAMP_NOBEGIN, TIMESTAMP_NOEND, TIMESTAMP_NOT_FINITE, and tm.

Referenced by timestamp2timestamptz(), and timestamp_cmp_timestamptz_internal().

timestamp2tm()

int timestamp2tm	(	Timestamp	dt,
		int *	tzp,
		struct pg_tm *	tm,
		fsec_t *	fsec,
		const char **	tzn,
		pg_tz *	attimezone
	)

Definition at line 1838 of file timestamp.c.

{
    Timestamp   date;
    Timestamp   time;
    pg_time_t   utime;
 
    /* Use session timezone if caller asks for default */
    if (attimezone == NULL)
        attimezone = session_timezone;
 
    time = dt;
    TMODULO(time, date, USECS_PER_DAY);
 
    if (time < INT64CONST(0))
    {
        time += USECS_PER_DAY;
        date -= 1;
    }
 
    /* add offset to go from J2000 back to standard Julian date */
    date += POSTGRES_EPOCH_JDATE;
 
    /* Julian day routine does not work for negative Julian days */
    if (date < 0 || date > (Timestamp) INT_MAX)
        return -1;
 
    j2date((int) date, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
    dt2time(time, &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
 
    /* Done if no TZ conversion wanted */
    if (tzp == NULL)
    {
        tm->tm_isdst = -1;
        tm->tm_gmtoff = 0;
        tm->tm_zone = NULL;
        if (tzn != NULL)
            *tzn = NULL;
        return 0;
    }
 
    /*
     * If the time falls within the range of pg_time_t, use pg_localtime() to
     * rotate to the local time zone.
     *
     * First, convert to an integral timestamp, avoiding possibly
     * platform-specific roundoff-in-wrong-direction errors, and adjust to
     * Unix epoch.  Then see if we can convert to pg_time_t without loss. This
     * coding avoids hardwiring any assumptions about the width of pg_time_t,
     * so it should behave sanely on machines without int64.
     */
    dt = (dt - *fsec) / USECS_PER_SEC +
        (POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY;
    utime = (pg_time_t) dt;
    if ((Timestamp) utime == dt)
    {
        struct pg_tm *tx = pg_localtime(&utime, attimezone);
 
        tm->tm_year = tx->tm_year + 1900;
        tm->tm_mon = tx->tm_mon + 1;
        tm->tm_mday = tx->tm_mday;
        tm->tm_hour = tx->tm_hour;
        tm->tm_min = tx->tm_min;
        tm->tm_sec = tx->tm_sec;
        tm->tm_isdst = tx->tm_isdst;
        tm->tm_gmtoff = tx->tm_gmtoff;
        tm->tm_zone = tx->tm_zone;
        *tzp = -tm->tm_gmtoff;
        if (tzn != NULL)
            *tzn = tm->tm_zone;
    }
    else
    {
        /*
         * When out of range of pg_time_t, treat as GMT
         */
        *tzp = 0;
        /* Mark this as *no* time zone available */
        tm->tm_isdst = -1;
        tm->tm_gmtoff = 0;
        tm->tm_zone = NULL;
        if (tzn != NULL)
            *tzn = NULL;
    }
 
    return 0;
}

References dt2time(), j2date(), pg_localtime(), POSTGRES_EPOCH_JDATE, SECS_PER_DAY, session_timezone, tm, pg_tm::tm_gmtoff, pg_tm::tm_hour, pg_tm::tm_isdst, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, pg_tm::tm_year, pg_tm::tm_zone, TMODULO, UNIX_EPOCH_JDATE, USECS_PER_DAY, and USECS_PER_SEC.

Referenced by DetermineTimeZoneAbbrevOffsetTS(), GetCurrentTimeUsec(), JsonEncodeDateTime(), make_timestamptz_at_timezone(), map_sql_value_to_xml_value(), PGTYPEStimestamp_add_interval(), PGTYPEStimestamp_fmt_asc(), PGTYPEStimestamp_to_asc(), timestamp2timestamptz_opt_overflow(), timestamp_age(), timestamp_date(), timestamp_out(), timestamp_part_common(), timestamp_pl_interval(), timestamp_recv(), timestamp_time(), timestamp_to_char(), timestamp_trunc(), timestamp_zone(), timestamptz2timestamp(), timestamptz_age(), timestamptz_date(), timestamptz_out(), timestamptz_part_common(), timestamptz_pl_interval_internal(), timestamptz_recv(), timestamptz_time(), timestamptz_timetz(), timestamptz_to_char(), timestamptz_to_str(), timestamptz_trunc_internal(), timestamptz_zone(), and timetz_zone().

timestamp_cmp_internal()

int timestamp_cmp_internal	(	Timestamp	dt1,
		Timestamp	dt2
	)

Definition at line 2133 of file timestamp.c.

{
    return (dt1 < dt2) ? -1 : ((dt1 > dt2) ? 1 : 0);
}

Referenced by date_cmp_timestamp_internal(), generate_series_timestamp(), generate_series_timestamptz_internal(), timestamp_cmp(), timestamp_eq(), timestamp_fastcmp(), timestamp_ge(), timestamp_gt(), timestamp_larger(), timestamp_le(), timestamp_lt(), timestamp_ne(), and timestamp_smaller().

timestamp_cmp_timestamptz_internal()

int32 timestamp_cmp_timestamptz_internal	(	Timestamp	timestampVal,
		TimestampTz	dt2
	)

Definition at line 2248 of file timestamp.c.

{
    TimestampTz dt1;
    int         overflow;
 
    dt1 = timestamp2timestamptz_opt_overflow(timestampVal, &overflow);
    if (overflow > 0)
    {
        /* dt1 is larger than any finite timestamp, but less than infinity */
        return TIMESTAMP_IS_NOEND(dt2) ? -1 : +1;
    }
    if (overflow < 0)
    {
        /* dt1 is less than any finite timestamp, but more than -infinity */
        return TIMESTAMP_IS_NOBEGIN(dt2) ? +1 : -1;
    }
 
    return timestamptz_cmp_internal(dt1, dt2);
}

References timestamp2timestamptz_opt_overflow(), TIMESTAMP_IS_NOBEGIN, TIMESTAMP_IS_NOEND, and timestamptz_cmp_internal.

Referenced by cmpTimestampToTimestampTz(), timestamp_cmp_timestamptz(), timestamp_eq_timestamptz(), timestamp_ge_timestamptz(), timestamp_gt_timestamptz(), timestamp_le_timestamptz(), timestamp_lt_timestamptz(), timestamp_ne_timestamptz(), timestamptz_cmp_timestamp(), timestamptz_eq_timestamp(), timestamptz_ge_timestamp(), timestamptz_gt_timestamp(), timestamptz_le_timestamp(), timestamptz_lt_timestamp(), and timestamptz_ne_timestamp().

TimestampDifference()

void TimestampDifference	(	TimestampTz	start_time,
		TimestampTz	stop_time,
		long *	secs,
		int *	microsecs
	)

Definition at line 1667 of file timestamp.c.

{
    TimestampTz diff = stop_time - start_time;
 
    if (diff <= 0)
    {
        *secs = 0;
        *microsecs = 0;
    }
    else
    {
        *secs = (long) (diff / USECS_PER_SEC);
        *microsecs = (int) (diff % USECS_PER_SEC);
    }
}

References start_time, and USECS_PER_SEC.

Referenced by check_log_duration(), has_startup_progress_timeout_expired(), heap_vacuum_rel(), launcher_determine_sleep(), log_disconnections(), LogRecoveryConflict(), pgstat_report_activity(), pgstat_update_dbstats(), ProcSleep(), and schedule_alarm().

TimestampDifferenceExceeds()

bool TimestampDifferenceExceeds	(	TimestampTz	start_time,
		TimestampTz	stop_time,
		int	msec
	)

Definition at line 1727 of file timestamp.c.

{
    TimestampTz diff = stop_time - start_time;
 
    return (diff >= msec * INT64CONST(1000));
}

References start_time.

Referenced by asyncQueueFillWarning(), AutoVacLauncherMain(), do_analyze_rel(), do_start_worker(), heap_vacuum_rel(), LockBufferForCleanup(), logicalrep_worker_launch(), maybe_start_bgworkers(), pa_send_data(), pgstat_report_stat(), process_syncing_tables_for_apply(), ProcSleep(), ResolveRecoveryConflictWithVirtualXIDs(), send_feedback(), WaitForWALToBecomeAvailable(), WalSndUpdateProgress(), and XLogBackgroundFlush().

TimestampDifferenceMilliseconds()

long TimestampDifferenceMilliseconds	(	TimestampTz	start_time,
		TimestampTz	stop_time
	)

Definition at line 1703 of file timestamp.c.

{
    TimestampTz diff;
 
    /* Deal with zero or negative elapsed time quickly. */
    if (start_time >= stop_time)
        return 0;
    /* To not fail with timestamp infinities, we must detect overflow. */
    if (pg_sub_s64_overflow(stop_time, start_time, &diff))
        return (long) INT_MAX;
    if (diff >= (INT_MAX * INT64CONST(1000) - 999))
        return (long) INT_MAX;
    else
        return (long) ((diff + 999) / 1000);
}

References pg_sub_s64_overflow(), and start_time.

Referenced by ApplyLauncherMain(), autoprewarm_main(), bbsink_copystream_archive_contents(), DetermineSleepTime(), do_analyze_rel(), GetReplicationApplyDelay(), GetReplicationTransferLatency(), LogCheckpointEnd(), pgfdw_get_cleanup_result(), recoveryApplyDelay(), WaitForWALToBecomeAvailable(), WalReceiverMain(), and WalSndComputeSleeptime().

TimestampGetDatum()

static Datum TimestampGetDatum ( Timestamp  X )

inlinestatic

Definition at line 46 of file timestamp.h.

{
    return Int64GetDatum(X);
}

References Int64GetDatum().

Referenced by date_mi_interval(), date_pl_interval(), gbt_num_fetch(), generate_series_timestamp(), in_range_date_interval(), in_range_timestamp_interval(), leftmostvalue_timestamp(), parse_datetime(), sql_localtimestamp(), and timestamp_mi_interval().

TimestampTimestampTzRequiresRewrite()

bool TimestampTimestampTzRequiresRewrite

(

void

)

Definition at line 5538 of file timestamp.c.

{
    long        offset;
 
    if (pg_get_timezone_offset(session_timezone, &offset) && offset == 0)
        return false;
    return true;
}

References pg_get_timezone_offset(), and session_timezone.

Referenced by ATColumnChangeRequiresRewrite().

timestamptz_to_str()

const char* timestamptz_to_str

(

TimestampTz

t

)

Definition at line 1790 of file timestamp.c.

{
    static char buf[MAXDATELEN + 1];
    int         tz;
    struct pg_tm tt,
               *tm = &tt;
    fsec_t      fsec;
    const char *tzn;
 
    if (TIMESTAMP_NOT_FINITE(t))
        EncodeSpecialTimestamp(t, buf);
    else if (timestamp2tm(t, &tz, tm, &fsec, &tzn, NULL) == 0)
        EncodeDateTime(tm, fsec, true, tz, tzn, USE_ISO_DATES, buf);
    else
        strlcpy(buf, "(timestamp out of range)", sizeof(buf));
 
    return buf;
}

References buf, EncodeDateTime(), EncodeSpecialTimestamp(), MAXDATELEN, snprintf, strlcpy(), timestamp2tm(), TIMESTAMP_NOT_FINITE, timestamptz_to_time_t(), tm, USE_ISO_DATES, and USECS_PER_SEC.

Referenced by CreateRestartPoint(), getRecoveryStopReason(), InitWalRecovery(), PerformWalRecovery(), pg_decode_commit_prepared_txn(), pg_decode_commit_txn(), pg_decode_prepare_txn(), pg_decode_rollback_prepared_txn(), pg_decode_stream_commit(), pg_decode_stream_prepare(), ProcessStandbyHSFeedbackMessage(), ProcessStandbyReplyMessage(), ProcessWalSndrMessage(), recoveryStopsAfter(), recoveryStopsBefore(), xact_desc_abort(), xact_desc_commit(), xact_desc_prepare(), xlog_desc(), and xlogrecovery_redo().

timestamptz_to_time_t()

pg_time_t timestamptz_to_time_t

(

TimestampTz

t

)

Definition at line 1770 of file timestamp.c.

{
    pg_time_t   result;
 
    result = (pg_time_t) (t / USECS_PER_SEC +
                          ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY));
 
    return result;
}

References POSTGRES_EPOCH_JDATE, SECS_PER_DAY, UNIX_EPOCH_JDATE, and USECS_PER_SEC.

Referenced by DetermineTimeZoneAbbrevOffsetTS(), InitProcessGlobals(), and timestamptz_to_str().

TimestampTzGetDatum()

static Datum TimestampTzGetDatum ( TimestampTz  X )

inlinestatic

Definition at line 52 of file timestamp.h.

{
    return Int64GetDatum(X);
}

References Int64GetDatum().

Referenced by current_timestamp(), generate_series_timestamptz_internal(), MakeOldSnapshotTimeMappingTuple(), parse_datetime(), pg_control_checkpoint(), pg_control_system(), pg_cursor(), pg_last_committed_xact(), pg_lock_status(), pg_ls_dir_files(), pg_prepared_statement(), pg_prepared_xact(), pg_stat_file(), pg_stat_get_activity(), pg_stat_get_archiver(), pg_stat_get_io(), pg_stat_get_recovery_prefetch(), pg_stat_get_replication_slot(), pg_stat_get_slru(), pg_stat_get_subscription(), pg_stat_get_subscription_stats(), pg_stat_get_wal(), pg_stat_get_wal_receiver(), pg_stat_get_wal_senders(), pg_stat_statements_info(), and pg_xact_commit_timestamp_origin().

tm2timestamp()

int tm2timestamp	(	struct pg_tm *	tm,
		fsec_t	fsec,
		int *	tzp,
		Timestamp *	result
	)

Definition at line 1934 of file timestamp.c.

{
    TimeOffset  date;
    TimeOffset  time;
 
    /* Prevent overflow in Julian-day routines */
    if (!IS_VALID_JULIAN(tm->tm_year, tm->tm_mon, tm->tm_mday))
    {
        *result = 0;            /* keep compiler quiet */
        return -1;
    }
 
    date = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE;
    time = time2t(tm->tm_hour, tm->tm_min, tm->tm_sec, fsec);
 
    *result = date * USECS_PER_DAY + time;
    /* check for major overflow */
    if ((*result - time) / USECS_PER_DAY != date)
    {
        *result = 0;            /* keep compiler quiet */
        return -1;
    }
    /* check for just-barely overflow (okay except time-of-day wraps) */
    /* caution: we want to allow 1999-12-31 24:00:00 */
    if ((*result < 0 && date > 0) ||
        (*result > 0 && date < -1))
    {
        *result = 0;            /* keep compiler quiet */
        return -1;
    }
    if (tzp != NULL)
        *result = dt2local(*result, -(*tzp));
 
    /* final range check catches just-out-of-range timestamps */
    if (!IS_VALID_TIMESTAMP(*result))
    {
        *result = 0;            /* keep compiler quiet */
        return -1;
    }
 
    return 0;
}

References date2j(), dt2local(), IS_VALID_JULIAN, IS_VALID_TIMESTAMP, POSTGRES_EPOCH_JDATE, time2t(), tm, pg_tm::tm_hour, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_sec, pg_tm::tm_year, and USECS_PER_DAY.

Referenced by check_recovery_target_time(), parse_datetime(), PGTYPEStimestamp_add_interval(), PGTYPEStimestamp_current(), PGTYPEStimestamp_defmt_scan(), PGTYPEStimestamp_from_asc(), SetEpochTimestamp(), timestamp_in(), timestamp_pl_interval(), timestamp_trunc(), timestamp_zone(), timestamptz2timestamp(), timestamptz_in(), timestamptz_pl_interval_internal(), timestamptz_trunc_internal(), timestamptz_zone(), and to_timestamp().

Variable Documentation

PgReloadTime

PGDLLIMPORT TimestampTz PgReloadTime

extern

Definition at line 56 of file timestamp.c.

Referenced by pg_conf_load_time(), and ProcessConfigFileInternal().

PgStartTime

PGDLLIMPORT TimestampTz PgStartTime

extern

Definition at line 53 of file timestamp.c.

Referenced by pg_postmaster_start_time(), PostgresSingleUserMain(), and PostmasterMain().