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datetime.h File Reference
#include "utils/timestamp.h"
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Data Structures

struct  datetkn
 
struct  TimeZoneAbbrevTable
 
struct  DynamicZoneAbbrev
 
struct  DateTimeErrorExtra
 

Macros

#define DAGO   "ago"
 
#define DCURRENT   "current"
 
#define EPOCH   "epoch"
 
#define INVALID   "invalid"
 
#define EARLY   "-infinity"
 
#define LATE   "infinity"
 
#define NOW   "now"
 
#define TODAY   "today"
 
#define TOMORROW   "tomorrow"
 
#define YESTERDAY   "yesterday"
 
#define ZULU   "zulu"
 
#define DMICROSEC   "usecond"
 
#define DMILLISEC   "msecond"
 
#define DSECOND   "second"
 
#define DMINUTE   "minute"
 
#define DHOUR   "hour"
 
#define DDAY   "day"
 
#define DWEEK   "week"
 
#define DMONTH   "month"
 
#define DQUARTER   "quarter"
 
#define DYEAR   "year"
 
#define DDECADE   "decade"
 
#define DCENTURY   "century"
 
#define DMILLENNIUM   "millennium"
 
#define DA_D   "ad"
 
#define DB_C   "bc"
 
#define DTIMEZONE   "timezone"
 
#define AM   0
 
#define PM   1
 
#define HR24   2
 
#define AD   0
 
#define BC   1
 
#define RESERV   0
 
#define MONTH   1
 
#define YEAR   2
 
#define DAY   3
 
#define JULIAN   4
 
#define TZ   5 /* fixed-offset timezone abbreviation */
 
#define DTZ   6 /* fixed-offset timezone abbrev, DST */
 
#define DYNTZ   7 /* dynamic timezone abbreviation */
 
#define IGNORE_DTF   8
 
#define AMPM   9
 
#define HOUR   10
 
#define MINUTE   11
 
#define SECOND   12
 
#define MILLISECOND   13
 
#define MICROSECOND   14
 
#define DOY   15
 
#define DOW   16
 
#define UNITS   17
 
#define ADBC   18
 
#define AGO   19
 
#define ABS_BEFORE   20
 
#define ABS_AFTER   21
 
#define ISODATE   22
 
#define ISOTIME   23
 
#define WEEK   24
 
#define DECADE   25
 
#define CENTURY   26
 
#define MILLENNIUM   27
 
#define DTZMOD   28 /* "DST" as a separate word */
 
#define UNKNOWN_FIELD   31
 
#define DTK_NUMBER   0
 
#define DTK_STRING   1
 
#define DTK_DATE   2
 
#define DTK_TIME   3
 
#define DTK_TZ   4
 
#define DTK_AGO   5
 
#define DTK_SPECIAL   6
 
#define DTK_EARLY   9
 
#define DTK_LATE   10
 
#define DTK_EPOCH   11
 
#define DTK_NOW   12
 
#define DTK_YESTERDAY   13
 
#define DTK_TODAY   14
 
#define DTK_TOMORROW   15
 
#define DTK_ZULU   16
 
#define DTK_DELTA   17
 
#define DTK_SECOND   18
 
#define DTK_MINUTE   19
 
#define DTK_HOUR   20
 
#define DTK_DAY   21
 
#define DTK_WEEK   22
 
#define DTK_MONTH   23
 
#define DTK_QUARTER   24
 
#define DTK_YEAR   25
 
#define DTK_DECADE   26
 
#define DTK_CENTURY   27
 
#define DTK_MILLENNIUM   28
 
#define DTK_MILLISEC   29
 
#define DTK_MICROSEC   30
 
#define DTK_JULIAN   31
 
#define DTK_DOW   32
 
#define DTK_DOY   33
 
#define DTK_TZ_HOUR   34
 
#define DTK_TZ_MINUTE   35
 
#define DTK_ISOYEAR   36
 
#define DTK_ISODOW   37
 
#define DTK_M(t)   (0x01 << (t))
 
#define DTK_ALL_SECS_M   (DTK_M(SECOND) | DTK_M(MILLISECOND) | DTK_M(MICROSECOND))
 
#define DTK_DATE_M   (DTK_M(YEAR) | DTK_M(MONTH) | DTK_M(DAY))
 
#define DTK_TIME_M   (DTK_M(HOUR) | DTK_M(MINUTE) | DTK_ALL_SECS_M)
 
#define MAXDATELEN   128
 
#define MAXDATEFIELDS   25
 
#define TOKMAXLEN   10
 
#define FMODULO(t, q, u)
 
#define TMODULO(t, q, u)
 
#define isleap(y)   (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
 
#define DTERR_BAD_FORMAT   (-1)
 
#define DTERR_FIELD_OVERFLOW   (-2)
 
#define DTERR_MD_FIELD_OVERFLOW   (-3) /* triggers hint about DateStyle */
 
#define DTERR_INTERVAL_OVERFLOW   (-4)
 
#define DTERR_TZDISP_OVERFLOW   (-5)
 
#define DTERR_BAD_TIMEZONE   (-6)
 
#define DTERR_BAD_ZONE_ABBREV   (-7)
 

Typedefs

typedef struct TimeZoneAbbrevTable TimeZoneAbbrevTable
 
typedef struct DynamicZoneAbbrev DynamicZoneAbbrev
 
typedef struct DateTimeErrorExtra DateTimeErrorExtra
 

Functions

void GetCurrentDateTime (struct pg_tm *tm)
 
void GetCurrentTimeUsec (struct pg_tm *tm, fsec_t *fsec, int *tzp)
 
void j2date (int jd, int *year, int *month, int *day)
 
int date2j (int year, int month, int day)
 
int ParseDateTime (const char *timestr, char *workbuf, size_t buflen, char **field, int *ftype, int maxfields, int *numfields)
 
int DecodeDateTime (char **field, int *ftype, int nf, int *dtype, struct pg_tm *tm, fsec_t *fsec, int *tzp, DateTimeErrorExtra *extra)
 
int DecodeTimezone (const char *str, int *tzp)
 
int DecodeTimeOnly (char **field, int *ftype, int nf, int *dtype, struct pg_tm *tm, fsec_t *fsec, int *tzp, DateTimeErrorExtra *extra)
 
int DecodeInterval (char **field, int *ftype, int nf, int range, int *dtype, struct pg_itm_in *itm_in)
 
int DecodeISO8601Interval (char *str, int *dtype, struct pg_itm_in *itm_in)
 
void DateTimeParseError (int dterr, DateTimeErrorExtra *extra, const char *str, const char *datatype, struct Node *escontext)
 
int DetermineTimeZoneOffset (struct pg_tm *tm, pg_tz *tzp)
 
int DetermineTimeZoneAbbrevOffset (struct pg_tm *tm, const char *abbr, pg_tz *tzp)
 
int DetermineTimeZoneAbbrevOffsetTS (TimestampTz ts, const char *abbr, pg_tz *tzp, int *isdst)
 
void EncodeDateOnly (struct pg_tm *tm, int style, char *str)
 
void EncodeTimeOnly (struct pg_tm *tm, fsec_t fsec, bool print_tz, int tz, int style, char *str)
 
void EncodeDateTime (struct pg_tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str)
 
void EncodeInterval (struct pg_itm *itm, int style, char *str)
 
void EncodeSpecialTimestamp (Timestamp dt, char *str)
 
int ValidateDate (int fmask, bool isjulian, bool is2digits, bool bc, struct pg_tm *tm)
 
int DecodeTimezoneAbbrev (int field, const char *lowtoken, int *ftype, int *offset, pg_tz **tz, DateTimeErrorExtra *extra)
 
int DecodeSpecial (int field, const char *lowtoken, int *val)
 
int DecodeUnits (int field, const char *lowtoken, int *val)
 
int j2day (int date)
 
struct NodeTemporalSimplify (int32 max_precis, struct Node *node)
 
bool CheckDateTokenTables (void)
 
TimeZoneAbbrevTableConvertTimeZoneAbbrevs (struct tzEntry *abbrevs, int n)
 
void InstallTimeZoneAbbrevs (TimeZoneAbbrevTable *tbl)
 
bool AdjustTimestampForTypmod (Timestamp *time, int32 typmod, struct Node *escontext)
 

Variables

PGDLLIMPORT const char *const months []
 
PGDLLIMPORT const char *const days []
 
PGDLLIMPORT const int day_tab [2][13]
 

Macro Definition Documentation

◆ ABS_AFTER

#define ABS_AFTER   21

Definition at line 112 of file datetime.h.

◆ ABS_BEFORE

#define ABS_BEFORE   20

Definition at line 111 of file datetime.h.

◆ AD

#define AD   0

Definition at line 75 of file datetime.h.

◆ ADBC

#define ADBC   18

Definition at line 108 of file datetime.h.

◆ AGO

#define AGO   19

Definition at line 110 of file datetime.h.

◆ AM

#define AM   0

Definition at line 71 of file datetime.h.

◆ AMPM

#define AMPM   9

Definition at line 99 of file datetime.h.

◆ BC

#define BC   1

Definition at line 76 of file datetime.h.

◆ CENTURY

#define CENTURY   26

Definition at line 119 of file datetime.h.

◆ DA_D

#define DA_D   "ad"

Definition at line 60 of file datetime.h.

◆ DAGO

#define DAGO   "ago"

Definition at line 35 of file datetime.h.

◆ DAY

#define DAY   3

Definition at line 93 of file datetime.h.

◆ DB_C

#define DB_C   "bc"

Definition at line 61 of file datetime.h.

◆ DCENTURY

#define DCENTURY   "century"

Definition at line 58 of file datetime.h.

◆ DCURRENT

#define DCURRENT   "current"

Definition at line 36 of file datetime.h.

◆ DDAY

#define DDAY   "day"

Definition at line 52 of file datetime.h.

◆ DDECADE

#define DDECADE   "decade"

Definition at line 57 of file datetime.h.

◆ DECADE

#define DECADE   25

Definition at line 118 of file datetime.h.

◆ DHOUR

#define DHOUR   "hour"

Definition at line 51 of file datetime.h.

◆ DMICROSEC

#define DMICROSEC   "usecond"

Definition at line 47 of file datetime.h.

◆ DMILLENNIUM

#define DMILLENNIUM   "millennium"

Definition at line 59 of file datetime.h.

◆ DMILLISEC

#define DMILLISEC   "msecond"

Definition at line 48 of file datetime.h.

◆ DMINUTE

#define DMINUTE   "minute"

Definition at line 50 of file datetime.h.

◆ DMONTH

#define DMONTH   "month"

Definition at line 54 of file datetime.h.

◆ DOW

#define DOW   16

Definition at line 106 of file datetime.h.

◆ DOY

#define DOY   15

Definition at line 105 of file datetime.h.

◆ DQUARTER

#define DQUARTER   "quarter"

Definition at line 55 of file datetime.h.

◆ DSECOND

#define DSECOND   "second"

Definition at line 49 of file datetime.h.

◆ DTERR_BAD_FORMAT

#define DTERR_BAD_FORMAT   (-1)

Definition at line 282 of file datetime.h.

◆ DTERR_BAD_TIMEZONE

#define DTERR_BAD_TIMEZONE   (-6)

Definition at line 287 of file datetime.h.

◆ DTERR_BAD_ZONE_ABBREV

#define DTERR_BAD_ZONE_ABBREV   (-7)

Definition at line 288 of file datetime.h.

◆ DTERR_FIELD_OVERFLOW

#define DTERR_FIELD_OVERFLOW   (-2)

Definition at line 283 of file datetime.h.

◆ DTERR_INTERVAL_OVERFLOW

#define DTERR_INTERVAL_OVERFLOW   (-4)

Definition at line 285 of file datetime.h.

◆ DTERR_MD_FIELD_OVERFLOW

#define DTERR_MD_FIELD_OVERFLOW   (-3) /* triggers hint about DateStyle */

Definition at line 284 of file datetime.h.

◆ DTERR_TZDISP_OVERFLOW

#define DTERR_TZDISP_OVERFLOW   (-5)

Definition at line 286 of file datetime.h.

◆ DTIMEZONE

#define DTIMEZONE   "timezone"

Definition at line 62 of file datetime.h.

◆ DTK_AGO

#define DTK_AGO   5

Definition at line 147 of file datetime.h.

◆ DTK_ALL_SECS_M

#define DTK_ALL_SECS_M   (DTK_M(SECOND) | DTK_M(MILLISECOND) | DTK_M(MICROSECOND))

Definition at line 190 of file datetime.h.

◆ DTK_CENTURY

#define DTK_CENTURY   27

Definition at line 169 of file datetime.h.

◆ DTK_DATE

#define DTK_DATE   2

Definition at line 144 of file datetime.h.

◆ DTK_DATE_M

#define DTK_DATE_M   (DTK_M(YEAR) | DTK_M(MONTH) | DTK_M(DAY))

Definition at line 191 of file datetime.h.

◆ DTK_DAY

#define DTK_DAY   21

Definition at line 163 of file datetime.h.

◆ DTK_DECADE

#define DTK_DECADE   26

Definition at line 168 of file datetime.h.

◆ DTK_DELTA

#define DTK_DELTA   17

Definition at line 159 of file datetime.h.

◆ DTK_DOW

#define DTK_DOW   32

Definition at line 175 of file datetime.h.

◆ DTK_DOY

#define DTK_DOY   33

Definition at line 176 of file datetime.h.

◆ DTK_EARLY

#define DTK_EARLY   9

Definition at line 150 of file datetime.h.

◆ DTK_EPOCH

#define DTK_EPOCH   11

Definition at line 152 of file datetime.h.

◆ DTK_HOUR

#define DTK_HOUR   20

Definition at line 162 of file datetime.h.

◆ DTK_ISODOW

#define DTK_ISODOW   37

Definition at line 180 of file datetime.h.

◆ DTK_ISOYEAR

#define DTK_ISOYEAR   36

Definition at line 179 of file datetime.h.

◆ DTK_JULIAN

#define DTK_JULIAN   31

Definition at line 173 of file datetime.h.

◆ DTK_LATE

#define DTK_LATE   10

Definition at line 151 of file datetime.h.

◆ DTK_M

#define DTK_M (   t)    (0x01 << (t))

Definition at line 187 of file datetime.h.

◆ DTK_MICROSEC

#define DTK_MICROSEC   30

Definition at line 172 of file datetime.h.

◆ DTK_MILLENNIUM

#define DTK_MILLENNIUM   28

Definition at line 170 of file datetime.h.

◆ DTK_MILLISEC

#define DTK_MILLISEC   29

Definition at line 171 of file datetime.h.

◆ DTK_MINUTE

#define DTK_MINUTE   19

Definition at line 161 of file datetime.h.

◆ DTK_MONTH

#define DTK_MONTH   23

Definition at line 165 of file datetime.h.

◆ DTK_NOW

#define DTK_NOW   12

Definition at line 153 of file datetime.h.

◆ DTK_NUMBER

#define DTK_NUMBER   0

Definition at line 141 of file datetime.h.

◆ DTK_QUARTER

#define DTK_QUARTER   24

Definition at line 166 of file datetime.h.

◆ DTK_SECOND

#define DTK_SECOND   18

Definition at line 160 of file datetime.h.

◆ DTK_SPECIAL

#define DTK_SPECIAL   6

Definition at line 149 of file datetime.h.

◆ DTK_STRING

#define DTK_STRING   1

Definition at line 142 of file datetime.h.

◆ DTK_TIME

#define DTK_TIME   3

Definition at line 145 of file datetime.h.

◆ DTK_TIME_M

#define DTK_TIME_M   (DTK_M(HOUR) | DTK_M(MINUTE) | DTK_ALL_SECS_M)

Definition at line 192 of file datetime.h.

◆ DTK_TODAY

#define DTK_TODAY   14

Definition at line 155 of file datetime.h.

◆ DTK_TOMORROW

#define DTK_TOMORROW   15

Definition at line 156 of file datetime.h.

◆ DTK_TZ

#define DTK_TZ   4

Definition at line 146 of file datetime.h.

◆ DTK_TZ_HOUR

#define DTK_TZ_HOUR   34

Definition at line 177 of file datetime.h.

◆ DTK_TZ_MINUTE

#define DTK_TZ_MINUTE   35

Definition at line 178 of file datetime.h.

◆ DTK_WEEK

#define DTK_WEEK   22

Definition at line 164 of file datetime.h.

◆ DTK_YEAR

#define DTK_YEAR   25

Definition at line 167 of file datetime.h.

◆ DTK_YESTERDAY

#define DTK_YESTERDAY   13

Definition at line 154 of file datetime.h.

◆ DTK_ZULU

#define DTK_ZULU   16

Definition at line 157 of file datetime.h.

◆ DTZ

#define DTZ   6 /* fixed-offset timezone abbrev, DST */

Definition at line 96 of file datetime.h.

◆ DTZMOD

#define DTZMOD   28 /* "DST" as a separate word */

Definition at line 122 of file datetime.h.

◆ DWEEK

#define DWEEK   "week"

Definition at line 53 of file datetime.h.

◆ DYEAR

#define DYEAR   "year"

Definition at line 56 of file datetime.h.

◆ DYNTZ

#define DYNTZ   7 /* dynamic timezone abbreviation */

Definition at line 97 of file datetime.h.

◆ EARLY

#define EARLY   "-infinity"

Definition at line 39 of file datetime.h.

◆ EPOCH

#define EPOCH   "epoch"

Definition at line 37 of file datetime.h.

◆ FMODULO

#define FMODULO (   t,
  q,
 
)
Value:
do { \
(q) = (((t) < 0) ? ceil((t) / (u)) : floor((t) / (u))); \
if ((q) != 0) (t) -= rint((q) * (u)); \
} while(0)

Definition at line 237 of file datetime.h.

◆ HOUR

#define HOUR   10

Definition at line 100 of file datetime.h.

◆ HR24

#define HR24   2

Definition at line 73 of file datetime.h.

◆ IGNORE_DTF

#define IGNORE_DTF   8

Definition at line 98 of file datetime.h.

◆ INVALID

#define INVALID   "invalid"

Definition at line 38 of file datetime.h.

◆ isleap

#define isleap (   y)    (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))

Definition at line 271 of file datetime.h.

◆ ISODATE

#define ISODATE   22

Definition at line 114 of file datetime.h.

◆ ISOTIME

#define ISOTIME   23

Definition at line 115 of file datetime.h.

◆ JULIAN

#define JULIAN   4

Definition at line 94 of file datetime.h.

◆ LATE

#define LATE   "infinity"

Definition at line 40 of file datetime.h.

◆ MAXDATEFIELDS

#define MAXDATEFIELDS   25

Definition at line 202 of file datetime.h.

◆ MAXDATELEN

#define MAXDATELEN   128

Definition at line 200 of file datetime.h.

◆ MICROSECOND

#define MICROSECOND   14

Definition at line 104 of file datetime.h.

◆ MILLENNIUM

#define MILLENNIUM   27

Definition at line 120 of file datetime.h.

◆ MILLISECOND

#define MILLISECOND   13

Definition at line 103 of file datetime.h.

◆ MINUTE

#define MINUTE   11

Definition at line 101 of file datetime.h.

◆ MONTH

#define MONTH   1

Definition at line 91 of file datetime.h.

◆ NOW

#define NOW   "now"

Definition at line 41 of file datetime.h.

◆ PM

#define PM   1

Definition at line 72 of file datetime.h.

◆ RESERV

#define RESERV   0

Definition at line 90 of file datetime.h.

◆ SECOND

#define SECOND   12

Definition at line 102 of file datetime.h.

◆ TMODULO

#define TMODULO (   t,
  q,
 
)
Value:
do { \
(q) = ((t) / (u)); \
if ((q) != 0) (t) -= ((q) * (u)); \
} while(0)

Definition at line 248 of file datetime.h.

◆ TODAY

#define TODAY   "today"

Definition at line 42 of file datetime.h.

◆ TOKMAXLEN

#define TOKMAXLEN   10

Definition at line 204 of file datetime.h.

◆ TOMORROW

#define TOMORROW   "tomorrow"

Definition at line 43 of file datetime.h.

◆ TZ

#define TZ   5 /* fixed-offset timezone abbreviation */

Definition at line 95 of file datetime.h.

◆ UNITS

#define UNITS   17

Definition at line 107 of file datetime.h.

◆ UNKNOWN_FIELD

#define UNKNOWN_FIELD   31

Definition at line 124 of file datetime.h.

◆ WEEK

#define WEEK   24

Definition at line 117 of file datetime.h.

◆ YEAR

#define YEAR   2

Definition at line 92 of file datetime.h.

◆ YESTERDAY

#define YESTERDAY   "yesterday"

Definition at line 44 of file datetime.h.

◆ ZULU

#define ZULU   "zulu"

Definition at line 45 of file datetime.h.

Typedef Documentation

◆ DateTimeErrorExtra

◆ DynamicZoneAbbrev

◆ TimeZoneAbbrevTable

Function Documentation

◆ AdjustTimestampForTypmod()

bool AdjustTimestampForTypmod ( Timestamp time,
int32  typmod,
struct Node escontext 
)

Definition at line 348 of file timestamp.c.

349 {
350  static const int64 TimestampScales[MAX_TIMESTAMP_PRECISION + 1] = {
351  INT64CONST(1000000),
352  INT64CONST(100000),
353  INT64CONST(10000),
354  INT64CONST(1000),
355  INT64CONST(100),
356  INT64CONST(10),
357  INT64CONST(1)
358  };
359 
360  static const int64 TimestampOffsets[MAX_TIMESTAMP_PRECISION + 1] = {
361  INT64CONST(500000),
362  INT64CONST(50000),
363  INT64CONST(5000),
364  INT64CONST(500),
365  INT64CONST(50),
366  INT64CONST(5),
367  INT64CONST(0)
368  };
369 
370  if (!TIMESTAMP_NOT_FINITE(*time)
371  && (typmod != -1) && (typmod != MAX_TIMESTAMP_PRECISION))
372  {
373  if (typmod < 0 || typmod > MAX_TIMESTAMP_PRECISION)
374  ereturn(escontext, false,
375  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
376  errmsg("timestamp(%d) precision must be between %d and %d",
377  typmod, 0, MAX_TIMESTAMP_PRECISION)));
378 
379  if (*time >= INT64CONST(0))
380  {
381  *time = ((*time + TimestampOffsets[typmod]) / TimestampScales[typmod]) *
382  TimestampScales[typmod];
383  }
384  else
385  {
386  *time = -((((-*time) + TimestampOffsets[typmod]) / TimestampScales[typmod])
387  * TimestampScales[typmod]);
388  }
389  }
390 
391  return true;
392 }
#define MAX_TIMESTAMP_PRECISION
Definition: timestamp.h:92
#define TIMESTAMP_NOT_FINITE(j)
Definition: timestamp.h:161
int errcode(int sqlerrcode)
Definition: elog.c:858
int errmsg(const char *fmt,...)
Definition: elog.c:1069
#define ereturn(context, dummy_value,...)
Definition: elog.h:276

References ereturn, errcode(), errmsg(), MAX_TIMESTAMP_PRECISION, and TIMESTAMP_NOT_FINITE.

Referenced by current_timestamp(), parse_datetime(), sql_localtimestamp(), timestamp_in(), timestamp_recv(), timestamp_scale(), timestamptz_in(), timestamptz_recv(), timestamptz_scale(), and to_timestamp().

◆ CheckDateTokenTables()

bool CheckDateTokenTables ( void  )

Definition at line 4761 of file datetime.c.

4762 {
4763  bool ok = true;
4764 
4765  Assert(UNIX_EPOCH_JDATE == date2j(1970, 1, 1));
4766  Assert(POSTGRES_EPOCH_JDATE == date2j(2000, 1, 1));
4767 
4768  ok &= CheckDateTokenTable("datetktbl", datetktbl, szdatetktbl);
4769  ok &= CheckDateTokenTable("deltatktbl", deltatktbl, szdeltatktbl);
4770  return ok;
4771 }
static bool CheckDateTokenTable(const char *tablename, const datetkn *base, int nel)
Definition: datetime.c:4729
static const datetkn datetktbl[]
Definition: datetime.c:106
static const int szdeltatktbl
Definition: datetime.c:252
static const int szdatetktbl
Definition: datetime.c:181
int date2j(int year, int month, int day)
Definition: datetime.c:286
static const datetkn deltatktbl[]
Definition: datetime.c:187
#define UNIX_EPOCH_JDATE
Definition: timestamp.h:201
#define POSTGRES_EPOCH_JDATE
Definition: timestamp.h:202
Assert(fmt[strlen(fmt) - 1] !='\n')

◆ ConvertTimeZoneAbbrevs()

TimeZoneAbbrevTable* ConvertTimeZoneAbbrevs ( struct tzEntry abbrevs,
int  n 
)

Definition at line 4823 of file datetime.c.

4824 {
4825  TimeZoneAbbrevTable *tbl;
4826  Size tbl_size;
4827  int i;
4828 
4829  /* Space for fixed fields and datetkn array */
4830  tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
4831  n * sizeof(datetkn);
4832  tbl_size = MAXALIGN(tbl_size);
4833  /* Count up space for dynamic abbreviations */
4834  for (i = 0; i < n; i++)
4835  {
4836  struct tzEntry *abbr = abbrevs + i;
4837 
4838  if (abbr->zone != NULL)
4839  {
4840  Size dsize;
4841 
4842  dsize = offsetof(DynamicZoneAbbrev, zone) +
4843  strlen(abbr->zone) + 1;
4844  tbl_size += MAXALIGN(dsize);
4845  }
4846  }
4847 
4848  /* Alloc the result ... */
4849  tbl = guc_malloc(LOG, tbl_size);
4850  if (!tbl)
4851  return NULL;
4852 
4853  /* ... and fill it in */
4854  tbl->tblsize = tbl_size;
4855  tbl->numabbrevs = n;
4856  /* in this loop, tbl_size reprises the space calculation above */
4857  tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
4858  n * sizeof(datetkn);
4859  tbl_size = MAXALIGN(tbl_size);
4860  for (i = 0; i < n; i++)
4861  {
4862  struct tzEntry *abbr = abbrevs + i;
4863  datetkn *dtoken = tbl->abbrevs + i;
4864 
4865  /* use strlcpy to truncate name if necessary */
4866  strlcpy(dtoken->token, abbr->abbrev, TOKMAXLEN + 1);
4867  if (abbr->zone != NULL)
4868  {
4869  /* Allocate a DynamicZoneAbbrev for this abbreviation */
4870  DynamicZoneAbbrev *dtza;
4871  Size dsize;
4872 
4873  dtza = (DynamicZoneAbbrev *) ((char *) tbl + tbl_size);
4874  dtza->tz = NULL;
4875  strcpy(dtza->zone, abbr->zone);
4876 
4877  dtoken->type = DYNTZ;
4878  /* value is offset from table start to DynamicZoneAbbrev */
4879  dtoken->value = (int32) tbl_size;
4880 
4881  dsize = offsetof(DynamicZoneAbbrev, zone) +
4882  strlen(abbr->zone) + 1;
4883  tbl_size += MAXALIGN(dsize);
4884  }
4885  else
4886  {
4887  dtoken->type = abbr->is_dst ? DTZ : TZ;
4888  dtoken->value = abbr->offset;
4889  }
4890  }
4891 
4892  /* Assert the two loops above agreed on size calculations */
4893  Assert(tbl->tblsize == tbl_size);
4894 
4895  /* Check the ordering, if testing */
4896  Assert(CheckDateTokenTable("timezone abbreviations", tbl->abbrevs, n));
4897 
4898  return tbl;
4899 }
#define MAXALIGN(LEN)
Definition: c.h:747
signed int int32
Definition: c.h:430
size_t Size
Definition: c.h:541
#define LOG
Definition: elog.h:31
void * guc_malloc(int elevel, size_t size)
Definition: guc.c:630
#define TZ
Definition: datetime.h:95
#define DTZ
Definition: datetime.h:96
#define TOKMAXLEN
Definition: datetime.h:204
#define DYNTZ
Definition: datetime.h:97
int i
Definition: isn.c:73
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
char zone[FLEXIBLE_ARRAY_MEMBER]
Definition: datetime.h:227
datetkn abbrevs[FLEXIBLE_ARRAY_MEMBER]
Definition: datetime.h:219
char token[TOKMAXLEN+1]
Definition: datetime.h:209
int32 value
Definition: datetime.h:211
char type
Definition: datetime.h:210
char * zone
Definition: tzparser.h:27
int offset
Definition: tzparser.h:29
char * abbrev
Definition: tzparser.h:26
bool is_dst
Definition: tzparser.h:30
Definition: zic.c:94

References tzEntry::abbrev, TimeZoneAbbrevTable::abbrevs, Assert(), CheckDateTokenTable(), DTZ, DYNTZ, guc_malloc(), i, tzEntry::is_dst, LOG, MAXALIGN, TimeZoneAbbrevTable::numabbrevs, tzEntry::offset, strlcpy(), TimeZoneAbbrevTable::tblsize, datetkn::token, TOKMAXLEN, datetkn::type, TZ, DynamicZoneAbbrev::tz, datetkn::value, DynamicZoneAbbrev::zone, and tzEntry::zone.

Referenced by load_tzoffsets().

◆ date2j()

int date2j ( int  year,
int  month,
int  day 
)

Definition at line 286 of file datetime.c.

287 {
288  int julian;
289  int century;
290 
291  if (month > 2)
292  {
293  month += 1;
294  year += 4800;
295  }
296  else
297  {
298  month += 13;
299  year += 4799;
300  }
301 
302  century = year / 100;
303  julian = year * 365 - 32167;
304  julian += year / 4 - century + century / 4;
305  julian += 7834 * month / 256 + day;
306 
307  return julian;
308 } /* date2j() */

◆ DateTimeParseError()

void DateTimeParseError ( int  dterr,
DateTimeErrorExtra extra,
const char *  str,
const char *  datatype,
struct Node escontext 
)

Definition at line 4042 of file datetime.c.

4045 {
4046  switch (dterr)
4047  {
4048  case DTERR_FIELD_OVERFLOW:
4049  errsave(escontext,
4050  (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4051  errmsg("date/time field value out of range: \"%s\"",
4052  str)));
4053  break;
4055  /* <nanny>same as above, but add hint about DateStyle</nanny> */
4056  errsave(escontext,
4057  (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4058  errmsg("date/time field value out of range: \"%s\"",
4059  str),
4060  errhint("Perhaps you need a different \"datestyle\" setting.")));
4061  break;
4063  errsave(escontext,
4064  (errcode(ERRCODE_INTERVAL_FIELD_OVERFLOW),
4065  errmsg("interval field value out of range: \"%s\"",
4066  str)));
4067  break;
4068  case DTERR_TZDISP_OVERFLOW:
4069  errsave(escontext,
4070  (errcode(ERRCODE_INVALID_TIME_ZONE_DISPLACEMENT_VALUE),
4071  errmsg("time zone displacement out of range: \"%s\"",
4072  str)));
4073  break;
4074  case DTERR_BAD_TIMEZONE:
4075  errsave(escontext,
4076  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4077  errmsg("time zone \"%s\" not recognized",
4078  extra->dtee_timezone)));
4079  break;
4080  case DTERR_BAD_ZONE_ABBREV:
4081  errsave(escontext,
4082  (errcode(ERRCODE_CONFIG_FILE_ERROR),
4083  errmsg("time zone \"%s\" not recognized",
4084  extra->dtee_timezone),
4085  errdetail("This time zone name appears in the configuration file for time zone abbreviation \"%s\".",
4086  extra->dtee_abbrev)));
4087  break;
4088  case DTERR_BAD_FORMAT:
4089  default:
4090  errsave(escontext,
4091  (errcode(ERRCODE_INVALID_DATETIME_FORMAT),
4092  errmsg("invalid input syntax for type %s: \"%s\"",
4093  datatype, str)));
4094  break;
4095  }
4096 }
int errdetail(const char *fmt,...)
Definition: elog.c:1202
int errhint(const char *fmt,...)
Definition: elog.c:1316
#define errsave(context,...)
Definition: elog.h:260
#define DTERR_BAD_ZONE_ABBREV
Definition: datetime.h:288
#define DTERR_INTERVAL_OVERFLOW
Definition: datetime.h:285
#define DTERR_BAD_TIMEZONE
Definition: datetime.h:287
#define DTERR_BAD_FORMAT
Definition: datetime.h:282
#define DTERR_TZDISP_OVERFLOW
Definition: datetime.h:286
#define DTERR_FIELD_OVERFLOW
Definition: datetime.h:283
#define DTERR_MD_FIELD_OVERFLOW
Definition: datetime.h:284
const char * dtee_timezone
Definition: datetime.h:293
const char * dtee_abbrev
Definition: datetime.h:295

References DateTimeErrorExtra::dtee_abbrev, DateTimeErrorExtra::dtee_timezone, DTERR_BAD_FORMAT, DTERR_BAD_TIMEZONE, DTERR_BAD_ZONE_ABBREV, DTERR_FIELD_OVERFLOW, DTERR_INTERVAL_OVERFLOW, DTERR_MD_FIELD_OVERFLOW, DTERR_TZDISP_OVERFLOW, errcode(), errdetail(), errhint(), errmsg(), errsave, and generate_unaccent_rules::str.

Referenced by date_in(), do_to_timestamp(), interval_in(), parse_datetime(), parse_sane_timezone(), pg_timezone_abbrevs(), time_in(), timestamp_in(), timestamp_zone(), timestamptz_in(), timestamptz_trunc_zone(), timestamptz_zone(), timetz_in(), timetz_zone(), and to_timestamp().

◆ DecodeDateTime()

int DecodeDateTime ( char **  field,
int *  ftype,
int  nf,
int *  dtype,
struct pg_tm tm,
fsec_t fsec,
int *  tzp,
DateTimeErrorExtra extra 
)

Definition at line 978 of file datetime.c.

981 {
982  int fmask = 0,
983  tmask,
984  type;
985  int ptype = 0; /* "prefix type" for ISO y2001m02d04 format */
986  int i;
987  int val;
988  int dterr;
989  int mer = HR24;
990  bool haveTextMonth = false;
991  bool isjulian = false;
992  bool is2digits = false;
993  bool bc = false;
994  pg_tz *namedTz = NULL;
995  pg_tz *abbrevTz = NULL;
996  pg_tz *valtz;
997  char *abbrev = NULL;
998  struct pg_tm cur_tm;
999 
1000  /*
1001  * We'll insist on at least all of the date fields, but initialize the
1002  * remaining fields in case they are not set later...
1003  */
1004  *dtype = DTK_DATE;
1005  tm->tm_hour = 0;
1006  tm->tm_min = 0;
1007  tm->tm_sec = 0;
1008  *fsec = 0;
1009  /* don't know daylight savings time status apriori */
1010  tm->tm_isdst = -1;
1011  if (tzp != NULL)
1012  *tzp = 0;
1013 
1014  for (i = 0; i < nf; i++)
1015  {
1016  switch (ftype[i])
1017  {
1018  case DTK_DATE:
1019 
1020  /*
1021  * Integral julian day with attached time zone? All other
1022  * forms with JD will be separated into distinct fields, so we
1023  * handle just this case here.
1024  */
1025  if (ptype == DTK_JULIAN)
1026  {
1027  char *cp;
1028  int jday;
1029 
1030  if (tzp == NULL)
1031  return DTERR_BAD_FORMAT;
1032 
1033  errno = 0;
1034  jday = strtoint(field[i], &cp, 10);
1035  if (errno == ERANGE || jday < 0)
1036  return DTERR_FIELD_OVERFLOW;
1037 
1038  j2date(jday, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1039  isjulian = true;
1040 
1041  /* Get the time zone from the end of the string */
1042  dterr = DecodeTimezone(cp, tzp);
1043  if (dterr)
1044  return dterr;
1045 
1046  tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1047  ptype = 0;
1048  break;
1049  }
1050 
1051  /*
1052  * Already have a date? Then this might be a time zone name
1053  * with embedded punctuation (e.g. "America/New_York") or a
1054  * run-together time with trailing time zone (e.g. hhmmss-zz).
1055  * - thomas 2001-12-25
1056  *
1057  * We consider it a time zone if we already have month & day.
1058  * This is to allow the form "mmm dd hhmmss tz year", which
1059  * we've historically accepted.
1060  */
1061  else if (ptype != 0 ||
1062  ((fmask & (DTK_M(MONTH) | DTK_M(DAY))) ==
1063  (DTK_M(MONTH) | DTK_M(DAY))))
1064  {
1065  /* No time zone accepted? Then quit... */
1066  if (tzp == NULL)
1067  return DTERR_BAD_FORMAT;
1068 
1069  if (isdigit((unsigned char) *field[i]) || ptype != 0)
1070  {
1071  char *cp;
1072 
1073  if (ptype != 0)
1074  {
1075  /* Sanity check; should not fail this test */
1076  if (ptype != DTK_TIME)
1077  return DTERR_BAD_FORMAT;
1078  ptype = 0;
1079  }
1080 
1081  /*
1082  * Starts with a digit but we already have a time
1083  * field? Then we are in trouble with a date and time
1084  * already...
1085  */
1086  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1087  return DTERR_BAD_FORMAT;
1088 
1089  if ((cp = strchr(field[i], '-')) == NULL)
1090  return DTERR_BAD_FORMAT;
1091 
1092  /* Get the time zone from the end of the string */
1093  dterr = DecodeTimezone(cp, tzp);
1094  if (dterr)
1095  return dterr;
1096  *cp = '\0';
1097 
1098  /*
1099  * Then read the rest of the field as a concatenated
1100  * time
1101  */
1102  dterr = DecodeNumberField(strlen(field[i]), field[i],
1103  fmask,
1104  &tmask, tm,
1105  fsec, &is2digits);
1106  if (dterr < 0)
1107  return dterr;
1108 
1109  /*
1110  * modify tmask after returning from
1111  * DecodeNumberField()
1112  */
1113  tmask |= DTK_M(TZ);
1114  }
1115  else
1116  {
1117  namedTz = pg_tzset(field[i]);
1118  if (!namedTz)
1119  {
1120  extra->dtee_timezone = field[i];
1121  return DTERR_BAD_TIMEZONE;
1122  }
1123  /* we'll apply the zone setting below */
1124  tmask = DTK_M(TZ);
1125  }
1126  }
1127  else
1128  {
1129  dterr = DecodeDate(field[i], fmask,
1130  &tmask, &is2digits, tm);
1131  if (dterr)
1132  return dterr;
1133  }
1134  break;
1135 
1136  case DTK_TIME:
1137 
1138  /*
1139  * This might be an ISO time following a "t" field.
1140  */
1141  if (ptype != 0)
1142  {
1143  /* Sanity check; should not fail this test */
1144  if (ptype != DTK_TIME)
1145  return DTERR_BAD_FORMAT;
1146  ptype = 0;
1147  }
1148  dterr = DecodeTime(field[i], fmask, INTERVAL_FULL_RANGE,
1149  &tmask, tm, fsec);
1150  if (dterr)
1151  return dterr;
1152 
1153  /* check for time overflow */
1155  *fsec))
1156  return DTERR_FIELD_OVERFLOW;
1157  break;
1158 
1159  case DTK_TZ:
1160  {
1161  int tz;
1162 
1163  if (tzp == NULL)
1164  return DTERR_BAD_FORMAT;
1165 
1166  dterr = DecodeTimezone(field[i], &tz);
1167  if (dterr)
1168  return dterr;
1169  *tzp = tz;
1170  tmask = DTK_M(TZ);
1171  }
1172  break;
1173 
1174  case DTK_NUMBER:
1175 
1176  /*
1177  * Was this an "ISO date" with embedded field labels? An
1178  * example is "y2001m02d04" - thomas 2001-02-04
1179  */
1180  if (ptype != 0)
1181  {
1182  char *cp;
1183  int value;
1184 
1185  errno = 0;
1186  value = strtoint(field[i], &cp, 10);
1187  if (errno == ERANGE)
1188  return DTERR_FIELD_OVERFLOW;
1189 
1190  /*
1191  * only a few kinds are allowed to have an embedded
1192  * decimal
1193  */
1194  if (*cp == '.')
1195  switch (ptype)
1196  {
1197  case DTK_JULIAN:
1198  case DTK_TIME:
1199  case DTK_SECOND:
1200  break;
1201  default:
1202  return DTERR_BAD_FORMAT;
1203  break;
1204  }
1205  else if (*cp != '\0')
1206  return DTERR_BAD_FORMAT;
1207 
1208  switch (ptype)
1209  {
1210  case DTK_YEAR:
1211  tm->tm_year = value;
1212  tmask = DTK_M(YEAR);
1213  break;
1214 
1215  case DTK_MONTH:
1216 
1217  /*
1218  * already have a month and hour? then assume
1219  * minutes
1220  */
1221  if ((fmask & DTK_M(MONTH)) != 0 &&
1222  (fmask & DTK_M(HOUR)) != 0)
1223  {
1224  tm->tm_min = value;
1225  tmask = DTK_M(MINUTE);
1226  }
1227  else
1228  {
1229  tm->tm_mon = value;
1230  tmask = DTK_M(MONTH);
1231  }
1232  break;
1233 
1234  case DTK_DAY:
1235  tm->tm_mday = value;
1236  tmask = DTK_M(DAY);
1237  break;
1238 
1239  case DTK_HOUR:
1240  tm->tm_hour = value;
1241  tmask = DTK_M(HOUR);
1242  break;
1243 
1244  case DTK_MINUTE:
1245  tm->tm_min = value;
1246  tmask = DTK_M(MINUTE);
1247  break;
1248 
1249  case DTK_SECOND:
1250  tm->tm_sec = value;
1251  tmask = DTK_M(SECOND);
1252  if (*cp == '.')
1253  {
1254  dterr = ParseFractionalSecond(cp, fsec);
1255  if (dterr)
1256  return dterr;
1257  tmask = DTK_ALL_SECS_M;
1258  }
1259  break;
1260 
1261  case DTK_TZ:
1262  tmask = DTK_M(TZ);
1263  dterr = DecodeTimezone(field[i], tzp);
1264  if (dterr)
1265  return dterr;
1266  break;
1267 
1268  case DTK_JULIAN:
1269  /* previous field was a label for "julian date" */
1270  if (value < 0)
1271  return DTERR_FIELD_OVERFLOW;
1272  tmask = DTK_DATE_M;
1273  j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1274  isjulian = true;
1275 
1276  /* fractional Julian Day? */
1277  if (*cp == '.')
1278  {
1279  double time;
1280 
1281  dterr = ParseFraction(cp, &time);
1282  if (dterr)
1283  return dterr;
1284  time *= USECS_PER_DAY;
1285  dt2time(time,
1286  &tm->tm_hour, &tm->tm_min,
1287  &tm->tm_sec, fsec);
1288  tmask |= DTK_TIME_M;
1289  }
1290  break;
1291 
1292  case DTK_TIME:
1293  /* previous field was "t" for ISO time */
1294  dterr = DecodeNumberField(strlen(field[i]), field[i],
1295  (fmask | DTK_DATE_M),
1296  &tmask, tm,
1297  fsec, &is2digits);
1298  if (dterr < 0)
1299  return dterr;
1300  if (tmask != DTK_TIME_M)
1301  return DTERR_BAD_FORMAT;
1302  break;
1303 
1304  default:
1305  return DTERR_BAD_FORMAT;
1306  break;
1307  }
1308 
1309  ptype = 0;
1310  *dtype = DTK_DATE;
1311  }
1312  else
1313  {
1314  char *cp;
1315  int flen;
1316 
1317  flen = strlen(field[i]);
1318  cp = strchr(field[i], '.');
1319 
1320  /* Embedded decimal and no date yet? */
1321  if (cp != NULL && !(fmask & DTK_DATE_M))
1322  {
1323  dterr = DecodeDate(field[i], fmask,
1324  &tmask, &is2digits, tm);
1325  if (dterr)
1326  return dterr;
1327  }
1328  /* embedded decimal and several digits before? */
1329  else if (cp != NULL && flen - strlen(cp) > 2)
1330  {
1331  /*
1332  * Interpret as a concatenated date or time Set the
1333  * type field to allow decoding other fields later.
1334  * Example: 20011223 or 040506
1335  */
1336  dterr = DecodeNumberField(flen, field[i], fmask,
1337  &tmask, tm,
1338  fsec, &is2digits);
1339  if (dterr < 0)
1340  return dterr;
1341  }
1342 
1343  /*
1344  * Is this a YMD or HMS specification, or a year number?
1345  * YMD and HMS are required to be six digits or more, so
1346  * if it is 5 digits, it is a year. If it is six or more
1347  * digits, we assume it is YMD or HMS unless no date and
1348  * no time values have been specified. This forces 6+
1349  * digit years to be at the end of the string, or to use
1350  * the ISO date specification.
1351  */
1352  else if (flen >= 6 && (!(fmask & DTK_DATE_M) ||
1353  !(fmask & DTK_TIME_M)))
1354  {
1355  dterr = DecodeNumberField(flen, field[i], fmask,
1356  &tmask, tm,
1357  fsec, &is2digits);
1358  if (dterr < 0)
1359  return dterr;
1360  }
1361  /* otherwise it is a single date/time field... */
1362  else
1363  {
1364  dterr = DecodeNumber(flen, field[i],
1365  haveTextMonth, fmask,
1366  &tmask, tm,
1367  fsec, &is2digits);
1368  if (dterr)
1369  return dterr;
1370  }
1371  }
1372  break;
1373 
1374  case DTK_STRING:
1375  case DTK_SPECIAL:
1376  /* timezone abbrevs take precedence over built-in tokens */
1377  dterr = DecodeTimezoneAbbrev(i, field[i],
1378  &type, &val, &valtz, extra);
1379  if (dterr)
1380  return dterr;
1381  if (type == UNKNOWN_FIELD)
1382  type = DecodeSpecial(i, field[i], &val);
1383  if (type == IGNORE_DTF)
1384  continue;
1385 
1386  tmask = DTK_M(type);
1387  switch (type)
1388  {
1389  case RESERV:
1390  switch (val)
1391  {
1392  case DTK_NOW:
1393  tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
1394  *dtype = DTK_DATE;
1395  GetCurrentTimeUsec(tm, fsec, tzp);
1396  break;
1397 
1398  case DTK_YESTERDAY:
1399  tmask = DTK_DATE_M;
1400  *dtype = DTK_DATE;
1401  GetCurrentDateTime(&cur_tm);
1402  j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) - 1,
1403  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1404  break;
1405 
1406  case DTK_TODAY:
1407  tmask = DTK_DATE_M;
1408  *dtype = DTK_DATE;
1409  GetCurrentDateTime(&cur_tm);
1410  tm->tm_year = cur_tm.tm_year;
1411  tm->tm_mon = cur_tm.tm_mon;
1412  tm->tm_mday = cur_tm.tm_mday;
1413  break;
1414 
1415  case DTK_TOMORROW:
1416  tmask = DTK_DATE_M;
1417  *dtype = DTK_DATE;
1418  GetCurrentDateTime(&cur_tm);
1419  j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) + 1,
1420  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1421  break;
1422 
1423  case DTK_ZULU:
1424  tmask = (DTK_TIME_M | DTK_M(TZ));
1425  *dtype = DTK_DATE;
1426  tm->tm_hour = 0;
1427  tm->tm_min = 0;
1428  tm->tm_sec = 0;
1429  if (tzp != NULL)
1430  *tzp = 0;
1431  break;
1432 
1433  default:
1434  *dtype = val;
1435  }
1436 
1437  break;
1438 
1439  case MONTH:
1440 
1441  /*
1442  * already have a (numeric) month? then see if we can
1443  * substitute...
1444  */
1445  if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
1446  !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 &&
1447  tm->tm_mon <= 31)
1448  {
1449  tm->tm_mday = tm->tm_mon;
1450  tmask = DTK_M(DAY);
1451  }
1452  haveTextMonth = true;
1453  tm->tm_mon = val;
1454  break;
1455 
1456  case DTZMOD:
1457 
1458  /*
1459  * daylight savings time modifier (solves "MET DST"
1460  * syntax)
1461  */
1462  tmask |= DTK_M(DTZ);
1463  tm->tm_isdst = 1;
1464  if (tzp == NULL)
1465  return DTERR_BAD_FORMAT;
1466  *tzp -= val;
1467  break;
1468 
1469  case DTZ:
1470 
1471  /*
1472  * set mask for TZ here _or_ check for DTZ later when
1473  * getting default timezone
1474  */
1475  tmask |= DTK_M(TZ);
1476  tm->tm_isdst = 1;
1477  if (tzp == NULL)
1478  return DTERR_BAD_FORMAT;
1479  *tzp = -val;
1480  break;
1481 
1482  case TZ:
1483  tm->tm_isdst = 0;
1484  if (tzp == NULL)
1485  return DTERR_BAD_FORMAT;
1486  *tzp = -val;
1487  break;
1488 
1489  case DYNTZ:
1490  tmask |= DTK_M(TZ);
1491  if (tzp == NULL)
1492  return DTERR_BAD_FORMAT;
1493  /* we'll determine the actual offset later */
1494  abbrevTz = valtz;
1495  abbrev = field[i];
1496  break;
1497 
1498  case AMPM:
1499  mer = val;
1500  break;
1501 
1502  case ADBC:
1503  bc = (val == BC);
1504  break;
1505 
1506  case DOW:
1507  tm->tm_wday = val;
1508  break;
1509 
1510  case UNITS:
1511  tmask = 0;
1512  ptype = val;
1513  break;
1514 
1515  case ISOTIME:
1516 
1517  /*
1518  * This is a filler field "t" indicating that the next
1519  * field is time. Try to verify that this is sensible.
1520  */
1521  tmask = 0;
1522 
1523  /* No preceding date? Then quit... */
1524  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1525  return DTERR_BAD_FORMAT;
1526 
1527  /***
1528  * We will need one of the following fields:
1529  * DTK_NUMBER should be hhmmss.fff
1530  * DTK_TIME should be hh:mm:ss.fff
1531  * DTK_DATE should be hhmmss-zz
1532  ***/
1533  if (i >= nf - 1 ||
1534  (ftype[i + 1] != DTK_NUMBER &&
1535  ftype[i + 1] != DTK_TIME &&
1536  ftype[i + 1] != DTK_DATE))
1537  return DTERR_BAD_FORMAT;
1538 
1539  ptype = val;
1540  break;
1541 
1542  case UNKNOWN_FIELD:
1543 
1544  /*
1545  * Before giving up and declaring error, check to see
1546  * if it is an all-alpha timezone name.
1547  */
1548  namedTz = pg_tzset(field[i]);
1549  if (!namedTz)
1550  return DTERR_BAD_FORMAT;
1551  /* we'll apply the zone setting below */
1552  tmask = DTK_M(TZ);
1553  break;
1554 
1555  default:
1556  return DTERR_BAD_FORMAT;
1557  }
1558  break;
1559 
1560  default:
1561  return DTERR_BAD_FORMAT;
1562  }
1563 
1564  if (tmask & fmask)
1565  return DTERR_BAD_FORMAT;
1566  fmask |= tmask;
1567  } /* end loop over fields */
1568 
1569  /* do final checking/adjustment of Y/M/D fields */
1570  dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
1571  if (dterr)
1572  return dterr;
1573 
1574  /* handle AM/PM */
1575  if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
1576  return DTERR_FIELD_OVERFLOW;
1577  if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
1578  tm->tm_hour = 0;
1579  else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
1580  tm->tm_hour += HOURS_PER_DAY / 2;
1581 
1582  /* do additional checking for full date specs... */
1583  if (*dtype == DTK_DATE)
1584  {
1585  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1586  {
1587  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1588  return 1;
1589  return DTERR_BAD_FORMAT;
1590  }
1591 
1592  /*
1593  * If we had a full timezone spec, compute the offset (we could not do
1594  * it before, because we need the date to resolve DST status).
1595  */
1596  if (namedTz != NULL)
1597  {
1598  /* daylight savings time modifier disallowed with full TZ */
1599  if (fmask & DTK_M(DTZMOD))
1600  return DTERR_BAD_FORMAT;
1601 
1602  *tzp = DetermineTimeZoneOffset(tm, namedTz);
1603  }
1604 
1605  /*
1606  * Likewise, if we had a dynamic timezone abbreviation, resolve it
1607  * now.
1608  */
1609  if (abbrevTz != NULL)
1610  {
1611  /* daylight savings time modifier disallowed with dynamic TZ */
1612  if (fmask & DTK_M(DTZMOD))
1613  return DTERR_BAD_FORMAT;
1614 
1615  *tzp = DetermineTimeZoneAbbrevOffset(tm, abbrev, abbrevTz);
1616  }
1617 
1618  /* timezone not specified? then use session timezone */
1619  if (tzp != NULL && !(fmask & DTK_M(TZ)))
1620  {
1621  /*
1622  * daylight savings time modifier but no standard timezone? then
1623  * error
1624  */
1625  if (fmask & DTK_M(DTZMOD))
1626  return DTERR_BAD_FORMAT;
1627 
1629  }
1630  }
1631 
1632  return 0;
1633 }
static int DecodeDate(char *str, int fmask, int *tmask, bool *is2digits, struct pg_tm *tm)
Definition: datetime.c:2540
static int DecodeNumberField(int len, char *str, int fmask, int *tmask, struct pg_tm *tm, fsec_t *fsec, bool *is2digits)
Definition: datetime.c:3054
static int ParseFraction(char *cp, double *frac)
Definition: datetime.c:680
static int DecodeNumber(int flen, char *str, bool haveTextMonth, int fmask, int *tmask, struct pg_tm *tm, fsec_t *fsec, bool *is2digits)
Definition: datetime.c:2869
int DetermineTimeZoneOffset(struct pg_tm *tm, pg_tz *tzp)
Definition: datetime.c:1649
static int ParseFractionalSecond(char *cp, fsec_t *fsec)
Definition: datetime.c:709
int DecodeTimezoneAbbrev(int field, const char *lowtoken, int *ftype, int *offset, pg_tz **tz, DateTimeErrorExtra *extra)
Definition: datetime.c:3233
static int DecodeTime(char *str, int fmask, int range, int *tmask, struct pg_tm *tm, fsec_t *fsec)
Definition: datetime.c:2814
int ValidateDate(int fmask, bool isjulian, bool is2digits, bool bc, struct pg_tm *tm)
Definition: datetime.c:2650
int DecodeSpecial(int field, const char *lowtoken, int *val)
Definition: datetime.c:3290
void j2date(int jd, int *year, int *month, int *day)
Definition: datetime.c:311
void GetCurrentDateTime(struct pg_tm *tm)
Definition: datetime.c:366
int DecodeTimezone(const char *str, int *tzp)
Definition: datetime.c:3149
void GetCurrentTimeUsec(struct pg_tm *tm, fsec_t *fsec, int *tzp)
Definition: datetime.c:387
int DetermineTimeZoneAbbrevOffset(struct pg_tm *tm, const char *abbr, pg_tz *tzp)
Definition: datetime.c:1810
void dt2time(Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec)
Definition: timestamp.c:1815
#define USECS_PER_DAY
Definition: timestamp.h:130
#define HOURS_PER_DAY
Definition: timestamp.h:117
bool time_overflows(int hour, int min, int sec, fsec_t fsec)
Definition: date.c:1441
#define DTK_TOMORROW
Definition: datetime.h:156
#define DTK_SPECIAL
Definition: datetime.h:149
#define AMPM
Definition: datetime.h:99
#define DTK_TIME
Definition: datetime.h:145
#define UNKNOWN_FIELD
Definition: datetime.h:124
#define DTK_SECOND
Definition: datetime.h:160
#define PM
Definition: datetime.h:72
#define DTK_NUMBER
Definition: datetime.h:141
#define DTK_STRING
Definition: datetime.h:142
#define DTK_JULIAN
Definition: datetime.h:173
#define MONTH
Definition: datetime.h:91
#define IGNORE_DTF
Definition: datetime.h:98
#define DTK_TIME_M
Definition: datetime.h:192
#define DTK_M(t)
Definition: datetime.h:187
#define HOUR
Definition: datetime.h:100
#define DAY
Definition: datetime.h:93
#define ADBC
Definition: datetime.h:108
#define YEAR
Definition: datetime.h:92
#define DTK_DATE
Definition: datetime.h:144
#define DTK_DAY
Definition: datetime.h:163
#define RESERV
Definition: datetime.h:90
#define BC
Definition: datetime.h:76
#define HR24
Definition: datetime.h:73
#define DTK_DATE_M
Definition: datetime.h:191
#define SECOND
Definition: datetime.h:102
#define DTK_ALL_SECS_M
Definition: datetime.h:190
#define DTZMOD
Definition: datetime.h:122
#define DTK_TZ
Definition: datetime.h:146
#define DOW
Definition: datetime.h:106
#define ISOTIME
Definition: datetime.h:115
#define DTK_HOUR
Definition: datetime.h:162
#define MINUTE
Definition: datetime.h:101
#define DTK_YEAR
Definition: datetime.h:167
#define AM
Definition: datetime.h:71
#define DTK_MONTH
Definition: datetime.h:165
#define DTK_YESTERDAY
Definition: datetime.h:154
#define DTK_ZULU
Definition: datetime.h:157
#define DTK_MINUTE
Definition: datetime.h:161
#define UNITS
Definition: datetime.h:107
#define DTK_TODAY
Definition: datetime.h:155
#define DTK_NOW
Definition: datetime.h:153
static struct @143 value
long val
Definition: informix.c:664
static struct pg_tm tm
Definition: localtime.c:104
PGDLLIMPORT pg_tz * session_timezone
Definition: pgtz.c:28
pg_tz * pg_tzset(const char *tzname)
Definition: pgtz.c:234
int strtoint(const char *pg_restrict str, char **pg_restrict endptr, int base)
Definition: string.c:51
Definition: pgtime.h:35
int tm_hour
Definition: pgtime.h:38
int tm_mday
Definition: pgtime.h:39
int tm_mon
Definition: pgtime.h:40
int tm_min
Definition: pgtime.h:37
int tm_wday
Definition: pgtime.h:42
int tm_sec
Definition: pgtime.h:36
int tm_isdst
Definition: pgtime.h:44
int tm_year
Definition: pgtime.h:41
Definition: pgtz.h:66
#define INTERVAL_FULL_RANGE
Definition: timestamp.h:76

References ADBC, AM, AMPM, BC, date2j(), DAY, DecodeDate(), DecodeNumber(), DecodeNumberField(), DecodeSpecial(), DecodeTime(), DecodeTimezone(), DecodeTimezoneAbbrev(), DetermineTimeZoneAbbrevOffset(), DetermineTimeZoneOffset(), DOW, dt2time(), DateTimeErrorExtra::dtee_timezone, DTERR_BAD_FORMAT, DTERR_BAD_TIMEZONE, DTERR_FIELD_OVERFLOW, DTK_ALL_SECS_M, DTK_DATE, DTK_DATE_M, DTK_DAY, DTK_HOUR, DTK_JULIAN, DTK_M, DTK_MINUTE, DTK_MONTH, DTK_NOW, DTK_NUMBER, DTK_SECOND, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TIME_M, DTK_TODAY, DTK_TOMORROW, DTK_TZ, DTK_YEAR, DTK_YESTERDAY, DTK_ZULU, DTZ, DTZMOD, DYNTZ, GetCurrentDateTime(), GetCurrentTimeUsec(), HOUR, HOURS_PER_DAY, HR24, i, IGNORE_DTF, INTERVAL_FULL_RANGE, ISOTIME, j2date(), MINUTE, MONTH, ParseFraction(), ParseFractionalSecond(), pg_tzset(), PM, RESERV, SECOND, session_timezone, strtoint(), time_overflows(), tm, 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_wday, pg_tm::tm_year, generate_unaccent_rules::type, TZ, UNITS, UNKNOWN_FIELD, USECS_PER_DAY, val, ValidateDate(), value, and YEAR.

Referenced by check_recovery_target_time(), date_in(), pg_logdir_ls_internal(), PGTYPESdate_from_asc(), PGTYPEStimestamp_from_asc(), timestamp_in(), and timestamptz_in().

◆ DecodeInterval()

int DecodeInterval ( char **  field,
int *  ftype,
int  nf,
int  range,
int *  dtype,
struct pg_itm_in itm_in 
)

Definition at line 3343 of file datetime.c.

3345 {
3346  bool force_negative = false;
3347  bool is_before = false;
3348  char *cp;
3349  int fmask = 0,
3350  tmask,
3351  type,
3352  uval;
3353  int i;
3354  int dterr;
3355  int64 val;
3356  double fval;
3357 
3358  *dtype = DTK_DELTA;
3359  type = IGNORE_DTF;
3360  ClearPgItmIn(itm_in);
3361 
3362  /*----------
3363  * The SQL standard defines the interval literal
3364  * '-1 1:00:00'
3365  * to mean "negative 1 days and negative 1 hours", while Postgres
3366  * traditionally treats this as meaning "negative 1 days and positive
3367  * 1 hours". In SQL_STANDARD intervalstyle, we apply the leading sign
3368  * to all fields if there are no other explicit signs.
3369  *
3370  * We leave the signs alone if there are additional explicit signs.
3371  * This protects us against misinterpreting postgres-style dump output,
3372  * since the postgres-style output code has always put an explicit sign on
3373  * all fields following a negative field. But note that SQL-spec output
3374  * is ambiguous and can be misinterpreted on load! (So it's best practice
3375  * to dump in postgres style, not SQL style.)
3376  *----------
3377  */
3378  if (IntervalStyle == INTSTYLE_SQL_STANDARD && *field[0] == '-')
3379  {
3380  force_negative = true;
3381  /* Check for additional explicit signs */
3382  for (i = 1; i < nf; i++)
3383  {
3384  if (*field[i] == '-' || *field[i] == '+')
3385  {
3386  force_negative = false;
3387  break;
3388  }
3389  }
3390  }
3391 
3392  /* read through list backwards to pick up units before values */
3393  for (i = nf - 1; i >= 0; i--)
3394  {
3395  switch (ftype[i])
3396  {
3397  case DTK_TIME:
3398  dterr = DecodeTimeForInterval(field[i], fmask, range,
3399  &tmask, itm_in);
3400  if (dterr)
3401  return dterr;
3402  if (force_negative &&
3403  itm_in->tm_usec > 0)
3404  itm_in->tm_usec = -itm_in->tm_usec;
3405  type = DTK_DAY;
3406  break;
3407 
3408  case DTK_TZ:
3409 
3410  /*
3411  * Timezone means a token with a leading sign character and at
3412  * least one digit; there could be ':', '.', '-' embedded in
3413  * it as well.
3414  */
3415  Assert(*field[i] == '-' || *field[i] == '+');
3416 
3417  /*
3418  * Check for signed hh:mm or hh:mm:ss. If so, process exactly
3419  * like DTK_TIME case above, plus handling the sign.
3420  */
3421  if (strchr(field[i] + 1, ':') != NULL &&
3422  DecodeTimeForInterval(field[i] + 1, fmask, range,
3423  &tmask, itm_in) == 0)
3424  {
3425  if (*field[i] == '-')
3426  {
3427  /* flip the sign on time field */
3428  if (itm_in->tm_usec == PG_INT64_MIN)
3429  return DTERR_FIELD_OVERFLOW;
3430  itm_in->tm_usec = -itm_in->tm_usec;
3431  }
3432 
3433  if (force_negative &&
3434  itm_in->tm_usec > 0)
3435  itm_in->tm_usec = -itm_in->tm_usec;
3436 
3437  /*
3438  * Set the next type to be a day, if units are not
3439  * specified. This handles the case of '1 +02:03' since we
3440  * are reading right to left.
3441  */
3442  type = DTK_DAY;
3443  break;
3444  }
3445 
3446  /*
3447  * Otherwise, fall through to DTK_NUMBER case, which can
3448  * handle signed float numbers and signed year-month values.
3449  */
3450 
3451  /* FALLTHROUGH */
3452 
3453  case DTK_DATE:
3454  case DTK_NUMBER:
3455  if (type == IGNORE_DTF)
3456  {
3457  /* use typmod to decide what rightmost field is */
3458  switch (range)
3459  {
3460  case INTERVAL_MASK(YEAR):
3461  type = DTK_YEAR;
3462  break;
3463  case INTERVAL_MASK(MONTH):
3465  type = DTK_MONTH;
3466  break;
3467  case INTERVAL_MASK(DAY):
3468  type = DTK_DAY;
3469  break;
3470  case INTERVAL_MASK(HOUR):
3472  type = DTK_HOUR;
3473  break;
3474  case INTERVAL_MASK(MINUTE):
3477  type = DTK_MINUTE;
3478  break;
3479  case INTERVAL_MASK(SECOND):
3483  type = DTK_SECOND;
3484  break;
3485  default:
3486  type = DTK_SECOND;
3487  break;
3488  }
3489  }
3490 
3491  errno = 0;
3492  val = strtoi64(field[i], &cp, 10);
3493  if (errno == ERANGE)
3494  return DTERR_FIELD_OVERFLOW;
3495 
3496  if (*cp == '-')
3497  {
3498  /* SQL "years-months" syntax */
3499  int val2;
3500 
3501  val2 = strtoint(cp + 1, &cp, 10);
3502  if (errno == ERANGE || val2 < 0 || val2 >= MONTHS_PER_YEAR)
3503  return DTERR_FIELD_OVERFLOW;
3504  if (*cp != '\0')
3505  return DTERR_BAD_FORMAT;
3506  type = DTK_MONTH;
3507  if (*field[i] == '-')
3508  val2 = -val2;
3510  return DTERR_FIELD_OVERFLOW;
3511  if (pg_add_s64_overflow(val, val2, &val))
3512  return DTERR_FIELD_OVERFLOW;
3513  fval = 0;
3514  }
3515  else if (*cp == '.')
3516  {
3517  dterr = ParseFraction(cp, &fval);
3518  if (dterr)
3519  return dterr;
3520  if (*field[i] == '-')
3521  fval = -fval;
3522  }
3523  else if (*cp == '\0')
3524  fval = 0;
3525  else
3526  return DTERR_BAD_FORMAT;
3527 
3528  tmask = 0; /* DTK_M(type); */
3529 
3530  if (force_negative)
3531  {
3532  /* val and fval should be of same sign, but test anyway */
3533  if (val > 0)
3534  val = -val;
3535  if (fval > 0)
3536  fval = -fval;
3537  }
3538 
3539  switch (type)
3540  {
3541  case DTK_MICROSEC:
3542  if (!AdjustMicroseconds(val, fval, 1, itm_in))
3543  return DTERR_FIELD_OVERFLOW;
3544  tmask = DTK_M(MICROSECOND);
3545  break;
3546 
3547  case DTK_MILLISEC:
3548  if (!AdjustMicroseconds(val, fval, 1000, itm_in))
3549  return DTERR_FIELD_OVERFLOW;
3550  tmask = DTK_M(MILLISECOND);
3551  break;
3552 
3553  case DTK_SECOND:
3554  if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
3555  return DTERR_FIELD_OVERFLOW;
3556 
3557  /*
3558  * If any subseconds were specified, consider this
3559  * microsecond and millisecond input as well.
3560  */
3561  if (fval == 0)
3562  tmask = DTK_M(SECOND);
3563  else
3564  tmask = DTK_ALL_SECS_M;
3565  break;
3566 
3567  case DTK_MINUTE:
3568  if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3569  return DTERR_FIELD_OVERFLOW;
3570  tmask = DTK_M(MINUTE);
3571  break;
3572 
3573  case DTK_HOUR:
3574  if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3575  return DTERR_FIELD_OVERFLOW;
3576  tmask = DTK_M(HOUR);
3577  type = DTK_DAY; /* set for next field */
3578  break;
3579 
3580  case DTK_DAY:
3581  if (!AdjustDays(val, 1, itm_in) ||
3582  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3583  return DTERR_FIELD_OVERFLOW;
3584  tmask = DTK_M(DAY);
3585  break;
3586 
3587  case DTK_WEEK:
3588  if (!AdjustDays(val, 7, itm_in) ||
3589  !AdjustFractDays(fval, 7, itm_in))
3590  return DTERR_FIELD_OVERFLOW;
3591  tmask = DTK_M(WEEK);
3592  break;
3593 
3594  case DTK_MONTH:
3595  if (!AdjustMonths(val, itm_in) ||
3596  !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3597  return DTERR_FIELD_OVERFLOW;
3598  tmask = DTK_M(MONTH);
3599  break;
3600 
3601  case DTK_YEAR:
3602  if (!AdjustYears(val, 1, itm_in) ||
3603  !AdjustFractYears(fval, 1, itm_in))
3604  return DTERR_FIELD_OVERFLOW;
3605  tmask = DTK_M(YEAR);
3606  break;
3607 
3608  case DTK_DECADE:
3609  if (!AdjustYears(val, 10, itm_in) ||
3610  !AdjustFractYears(fval, 10, itm_in))
3611  return DTERR_FIELD_OVERFLOW;
3612  tmask = DTK_M(DECADE);
3613  break;
3614 
3615  case DTK_CENTURY:
3616  if (!AdjustYears(val, 100, itm_in) ||
3617  !AdjustFractYears(fval, 100, itm_in))
3618  return DTERR_FIELD_OVERFLOW;
3619  tmask = DTK_M(CENTURY);
3620  break;
3621 
3622  case DTK_MILLENNIUM:
3623  if (!AdjustYears(val, 1000, itm_in) ||
3624  !AdjustFractYears(fval, 1000, itm_in))
3625  return DTERR_FIELD_OVERFLOW;
3626  tmask = DTK_M(MILLENNIUM);
3627  break;
3628 
3629  default:
3630  return DTERR_BAD_FORMAT;
3631  }
3632  break;
3633 
3634  case DTK_STRING:
3635  case DTK_SPECIAL:
3636  type = DecodeUnits(i, field[i], &uval);
3637  if (type == IGNORE_DTF)
3638  continue;
3639 
3640  tmask = 0; /* DTK_M(type); */
3641  switch (type)
3642  {
3643  case UNITS:
3644  type = uval;
3645  break;
3646 
3647  case AGO:
3648  is_before = true;
3649  type = uval;
3650  break;
3651 
3652  case RESERV:
3653  tmask = (DTK_DATE_M | DTK_TIME_M);
3654  *dtype = uval;
3655  break;
3656 
3657  default:
3658  return DTERR_BAD_FORMAT;
3659  }
3660  break;
3661 
3662  default:
3663  return DTERR_BAD_FORMAT;
3664  }
3665 
3666  if (tmask & fmask)
3667  return DTERR_BAD_FORMAT;
3668  fmask |= tmask;
3669  }
3670 
3671  /* ensure that at least one time field has been found */
3672  if (fmask == 0)
3673  return DTERR_BAD_FORMAT;
3674 
3675  /* finally, AGO negates everything */
3676  if (is_before)
3677  {
3678  if (itm_in->tm_usec == PG_INT64_MIN ||
3679  itm_in->tm_mday == INT_MIN ||
3680  itm_in->tm_mon == INT_MIN ||
3681  itm_in->tm_year == INT_MIN)
3682  return DTERR_FIELD_OVERFLOW;
3683 
3684  itm_in->tm_usec = -itm_in->tm_usec;
3685  itm_in->tm_mday = -itm_in->tm_mday;
3686  itm_in->tm_mon = -itm_in->tm_mon;
3687  itm_in->tm_year = -itm_in->tm_year;
3688  }
3689 
3690  return 0;
3691 }
int DecodeUnits(int field, const char *lowtoken, int *val)
Definition: datetime.c:3997
static bool AdjustDays(int64 val, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:633
static bool AdjustFractYears(double frac, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:601
static bool AdjustMicroseconds(int64 val, double fval, int64 scale, struct pg_itm_in *itm_in)
Definition: datetime.c:618
static int DecodeTimeForInterval(char *str, int fmask, int range, int *tmask, struct pg_itm_in *itm_in)
Definition: datetime.c:2843
static bool AdjustFractMicroseconds(double frac, int64 scale, struct pg_itm_in *itm_in)
Definition: datetime.c:537
static bool AdjustYears(int64 val, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:661
static bool AdjustMonths(int64 val, struct pg_itm_in *itm_in)
Definition: datetime.c:649
static bool AdjustFractDays(double frac, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:569
static void ClearPgItmIn(struct pg_itm_in *itm_in)
Definition: datetime.c:3322
#define strtoi64(str, endptr, base)
Definition: c.h:1233
#define PG_INT64_MIN
Definition: c.h:527
#define USECS_PER_HOUR
Definition: timestamp.h:131
#define MONTHS_PER_YEAR
Definition: timestamp.h:108
#define USECS_PER_SEC
Definition: timestamp.h:133
#define USECS_PER_MINUTE
Definition: timestamp.h:132
#define DAYS_PER_MONTH
Definition: timestamp.h:116
int IntervalStyle
Definition: globals.c:121
#define MILLENNIUM
Definition: datetime.h:120
#define DTK_DECADE
Definition: datetime.h:168
#define DTK_DELTA
Definition: datetime.h:159
#define MICROSECOND
Definition: datetime.h:104
#define WEEK
Definition: datetime.h:117
#define DECADE
Definition: datetime.h:118
#define DTK_CENTURY
Definition: datetime.h:169
#define MILLISECOND
Definition: datetime.h:103
#define CENTURY
Definition: datetime.h:119
#define DTK_MILLENNIUM
Definition: datetime.h:170
#define DTK_WEEK
Definition: datetime.h:164
#define DTK_MICROSEC
Definition: datetime.h:172
#define AGO
Definition: datetime.h:110
#define DTK_MILLISEC
Definition: datetime.h:171
static bool pg_mul_s64_overflow(int64 a, int64 b, int64 *result)
Definition: int.h:215
static bool pg_add_s64_overflow(int64 a, int64 b, int64 *result)
Definition: int.h:161
#define INTSTYLE_SQL_STANDARD
Definition: miscadmin.h:252
static struct cvec * range(struct vars *v, chr a, chr b, int cases)
Definition: regc_locale.c:412
int tm_mon
Definition: timestamp.h:86
int tm_year
Definition: timestamp.h:87
int tm_mday
Definition: timestamp.h:85
int64 tm_usec
Definition: timestamp.h:84
#define INTERVAL_MASK(b)
Definition: timestamp.h:73

References AdjustDays(), AdjustFractDays(), AdjustFractMicroseconds(), AdjustFractYears(), AdjustMicroseconds(), AdjustMonths(), AdjustYears(), AGO, Assert(), CENTURY, ClearPgItmIn(), DAY, DAYS_PER_MONTH, DECADE, DecodeTimeForInterval(), DecodeUnits(), DTERR_BAD_FORMAT, DTERR_FIELD_OVERFLOW, DTK_ALL_SECS_M, DTK_CENTURY, DTK_DATE, DTK_DATE_M, DTK_DAY, DTK_DECADE, DTK_DELTA, DTK_HOUR, DTK_M, DTK_MICROSEC, DTK_MILLENNIUM, DTK_MILLISEC, DTK_MINUTE, DTK_MONTH, DTK_NUMBER, DTK_SECOND, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TIME_M, DTK_TZ, DTK_WEEK, DTK_YEAR, HOUR, i, IGNORE_DTF, INTERVAL_MASK, IntervalStyle, INTSTYLE_SQL_STANDARD, MICROSECOND, MILLENNIUM, MILLISECOND, MINUTE, MONTH, MONTHS_PER_YEAR, ParseFraction(), pg_add_s64_overflow(), PG_INT64_MIN, pg_mul_s64_overflow(), range(), RESERV, SECOND, strtoi64, strtoint(), pg_itm_in::tm_mday, pg_itm_in::tm_mon, pg_itm_in::tm_usec, pg_itm_in::tm_year, generate_unaccent_rules::type, UNITS, USECS_PER_DAY, USECS_PER_HOUR, USECS_PER_MINUTE, USECS_PER_SEC, val, WEEK, and YEAR.

Referenced by interval_in().

◆ DecodeISO8601Interval()

int DecodeISO8601Interval ( char *  str,
int *  dtype,
struct pg_itm_in itm_in 
)

Definition at line 3779 of file datetime.c.

3781 {
3782  bool datepart = true;
3783  bool havefield = false;
3784 
3785  *dtype = DTK_DELTA;
3786  ClearPgItmIn(itm_in);
3787 
3788  if (strlen(str) < 2 || str[0] != 'P')
3789  return DTERR_BAD_FORMAT;
3790 
3791  str++;
3792  while (*str)
3793  {
3794  char *fieldstart;
3795  int64 val;
3796  double fval;
3797  char unit;
3798  int dterr;
3799 
3800  if (*str == 'T') /* T indicates the beginning of the time part */
3801  {
3802  datepart = false;
3803  havefield = false;
3804  str++;
3805  continue;
3806  }
3807 
3808  fieldstart = str;
3809  dterr = ParseISO8601Number(str, &str, &val, &fval);
3810  if (dterr)
3811  return dterr;
3812 
3813  /*
3814  * Note: we could step off the end of the string here. Code below
3815  * *must* exit the loop if unit == '\0'.
3816  */
3817  unit = *str++;
3818 
3819  if (datepart)
3820  {
3821  switch (unit) /* before T: Y M W D */
3822  {
3823  case 'Y':
3824  if (!AdjustYears(val, 1, itm_in) ||
3825  !AdjustFractYears(fval, 1, itm_in))
3826  return DTERR_FIELD_OVERFLOW;
3827  break;
3828  case 'M':
3829  if (!AdjustMonths(val, itm_in) ||
3830  !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3831  return DTERR_FIELD_OVERFLOW;
3832  break;
3833  case 'W':
3834  if (!AdjustDays(val, 7, itm_in) ||
3835  !AdjustFractDays(fval, 7, itm_in))
3836  return DTERR_FIELD_OVERFLOW;
3837  break;
3838  case 'D':
3839  if (!AdjustDays(val, 1, itm_in) ||
3840  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3841  return DTERR_FIELD_OVERFLOW;
3842  break;
3843  case 'T': /* ISO 8601 4.4.3.3 Alternative Format / Basic */
3844  case '\0':
3845  if (ISO8601IntegerWidth(fieldstart) == 8 && !havefield)
3846  {
3847  if (!AdjustYears(val / 10000, 1, itm_in) ||
3848  !AdjustMonths((val / 100) % 100, itm_in) ||
3849  !AdjustDays(val % 100, 1, itm_in) ||
3850  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3851  return DTERR_FIELD_OVERFLOW;
3852  if (unit == '\0')
3853  return 0;
3854  datepart = false;
3855  havefield = false;
3856  continue;
3857  }
3858  /* Else fall through to extended alternative format */
3859  /* FALLTHROUGH */
3860  case '-': /* ISO 8601 4.4.3.3 Alternative Format,
3861  * Extended */
3862  if (havefield)
3863  return DTERR_BAD_FORMAT;
3864 
3865  if (!AdjustYears(val, 1, itm_in) ||
3866  !AdjustFractYears(fval, 1, itm_in))
3867  return DTERR_FIELD_OVERFLOW;
3868  if (unit == '\0')
3869  return 0;
3870  if (unit == 'T')
3871  {
3872  datepart = false;
3873  havefield = false;
3874  continue;
3875  }
3876 
3877  dterr = ParseISO8601Number(str, &str, &val, &fval);
3878  if (dterr)
3879  return dterr;
3880  if (!AdjustMonths(val, itm_in) ||
3881  !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3882  return DTERR_FIELD_OVERFLOW;
3883  if (*str == '\0')
3884  return 0;
3885  if (*str == 'T')
3886  {
3887  datepart = false;
3888  havefield = false;
3889  continue;
3890  }
3891  if (*str != '-')
3892  return DTERR_BAD_FORMAT;
3893  str++;
3894 
3895  dterr = ParseISO8601Number(str, &str, &val, &fval);
3896  if (dterr)
3897  return dterr;
3898  if (!AdjustDays(val, 1, itm_in) ||
3899  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3900  return DTERR_FIELD_OVERFLOW;
3901  if (*str == '\0')
3902  return 0;
3903  if (*str == 'T')
3904  {
3905  datepart = false;
3906  havefield = false;
3907  continue;
3908  }
3909  return DTERR_BAD_FORMAT;
3910  default:
3911  /* not a valid date unit suffix */
3912  return DTERR_BAD_FORMAT;
3913  }
3914  }
3915  else
3916  {
3917  switch (unit) /* after T: H M S */
3918  {
3919  case 'H':
3920  if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3921  return DTERR_FIELD_OVERFLOW;
3922  break;
3923  case 'M':
3924  if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3925  return DTERR_FIELD_OVERFLOW;
3926  break;
3927  case 'S':
3928  if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
3929  return DTERR_FIELD_OVERFLOW;
3930  break;
3931  case '\0': /* ISO 8601 4.4.3.3 Alternative Format */
3932  if (ISO8601IntegerWidth(fieldstart) == 6 && !havefield)
3933  {
3934  if (!AdjustMicroseconds(val / 10000, 0, USECS_PER_HOUR, itm_in) ||
3935  !AdjustMicroseconds((val / 100) % 100, 0, USECS_PER_MINUTE, itm_in) ||
3936  !AdjustMicroseconds(val % 100, 0, USECS_PER_SEC, itm_in) ||
3937  !AdjustFractMicroseconds(fval, 1, itm_in))
3938  return DTERR_FIELD_OVERFLOW;
3939  return 0;
3940  }
3941  /* Else fall through to extended alternative format */
3942  /* FALLTHROUGH */
3943  case ':': /* ISO 8601 4.4.3.3 Alternative Format,
3944  * Extended */
3945  if (havefield)
3946  return DTERR_BAD_FORMAT;
3947 
3948  if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3949  return DTERR_FIELD_OVERFLOW;
3950  if (unit == '\0')
3951  return 0;
3952 
3953  dterr = ParseISO8601Number(str, &str, &val, &fval);
3954  if (dterr)
3955  return dterr;
3956  if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3957  return DTERR_FIELD_OVERFLOW;
3958  if (*str == '\0')
3959  return 0;
3960  if (*str != ':')
3961  return DTERR_BAD_FORMAT;
3962  str++;
3963 
3964  dterr = ParseISO8601Number(str, &str, &val, &fval);
3965  if (dterr)
3966  return dterr;
3967  if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
3968  return DTERR_FIELD_OVERFLOW;
3969  if (*str == '\0')
3970  return 0;
3971  return DTERR_BAD_FORMAT;
3972 
3973  default:
3974  /* not a valid time unit suffix */
3975  return DTERR_BAD_FORMAT;
3976  }
3977  }
3978 
3979  havefield = true;
3980  }
3981 
3982  return 0;
3983 }
static int ISO8601IntegerWidth(char *fieldstart)
Definition: datetime.c:3752
static int ParseISO8601Number(char *str, char **endptr, int64 *ipart, double *fpart)
Definition: datetime.c:3702

References AdjustDays(), AdjustFractDays(), AdjustFractMicroseconds(), AdjustFractYears(), AdjustMicroseconds(), AdjustMonths(), AdjustYears(), ClearPgItmIn(), DAYS_PER_MONTH, DTERR_BAD_FORMAT, DTERR_FIELD_OVERFLOW, DTK_DELTA, ISO8601IntegerWidth(), ParseISO8601Number(), generate_unaccent_rules::str, USECS_PER_DAY, USECS_PER_HOUR, USECS_PER_MINUTE, USECS_PER_SEC, and val.

Referenced by interval_in().

◆ DecodeSpecial()

int DecodeSpecial ( int  field,
const char *  lowtoken,
int *  val 
)

Definition at line 3290 of file datetime.c.

3291 {
3292  int type;
3293  const datetkn *tp;
3294 
3295  tp = datecache[field];
3296  /* use strncmp so that we match truncated tokens */
3297  if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
3298  {
3299  tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
3300  }
3301  if (tp == NULL)
3302  {
3303  type = UNKNOWN_FIELD;
3304  *val = 0;
3305  }
3306  else
3307  {
3308  datecache[field] = tp;
3309  type = tp->type;
3310  *val = tp->value;
3311  }
3312 
3313  return type;
3314 }
static const datetkn * datecache[MAXDATEFIELDS]
Definition: datetime.c:258
static const datetkn * datebsearch(const char *key, const datetkn *base, int nel)
Definition: datetime.c:4103

References datebsearch(), datecache, datetktbl, szdatetktbl, datetkn::token, TOKMAXLEN, generate_unaccent_rules::type, datetkn::type, UNKNOWN_FIELD, val, and datetkn::value.

Referenced by DecodeDate(), DecodeDateTime(), DecodeTimeOnly(), extract_date(), interval_part_common(), time_part_common(), timestamp_part_common(), timestamptz_part_common(), and timetz_part_common().

◆ DecodeTimeOnly()

int DecodeTimeOnly ( char **  field,
int *  ftype,
int  nf,
int *  dtype,
struct pg_tm tm,
fsec_t fsec,
int *  tzp,
DateTimeErrorExtra extra 
)

Definition at line 1928 of file datetime.c.

1931 {
1932  int fmask = 0,
1933  tmask,
1934  type;
1935  int ptype = 0; /* "prefix type" for ISO h04mm05s06 format */
1936  int i;
1937  int val;
1938  int dterr;
1939  bool isjulian = false;
1940  bool is2digits = false;
1941  bool bc = false;
1942  int mer = HR24;
1943  pg_tz *namedTz = NULL;
1944  pg_tz *abbrevTz = NULL;
1945  char *abbrev = NULL;
1946  pg_tz *valtz;
1947 
1948  *dtype = DTK_TIME;
1949  tm->tm_hour = 0;
1950  tm->tm_min = 0;
1951  tm->tm_sec = 0;
1952  *fsec = 0;
1953  /* don't know daylight savings time status apriori */
1954  tm->tm_isdst = -1;
1955 
1956  if (tzp != NULL)
1957  *tzp = 0;
1958 
1959  for (i = 0; i < nf; i++)
1960  {
1961  switch (ftype[i])
1962  {
1963  case DTK_DATE:
1964 
1965  /*
1966  * Time zone not allowed? Then should not accept dates or time
1967  * zones no matter what else!
1968  */
1969  if (tzp == NULL)
1970  return DTERR_BAD_FORMAT;
1971 
1972  /* Under limited circumstances, we will accept a date... */
1973  if (i == 0 && nf >= 2 &&
1974  (ftype[nf - 1] == DTK_DATE || ftype[1] == DTK_TIME))
1975  {
1976  dterr = DecodeDate(field[i], fmask,
1977  &tmask, &is2digits, tm);
1978  if (dterr)
1979  return dterr;
1980  }
1981  /* otherwise, this is a time and/or time zone */
1982  else
1983  {
1984  if (isdigit((unsigned char) *field[i]))
1985  {
1986  char *cp;
1987 
1988  /*
1989  * Starts with a digit but we already have a time
1990  * field? Then we are in trouble with time already...
1991  */
1992  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1993  return DTERR_BAD_FORMAT;
1994 
1995  /*
1996  * Should not get here and fail. Sanity check only...
1997  */
1998  if ((cp = strchr(field[i], '-')) == NULL)
1999  return DTERR_BAD_FORMAT;
2000 
2001  /* Get the time zone from the end of the string */
2002  dterr = DecodeTimezone(cp, tzp);
2003  if (dterr)
2004  return dterr;
2005  *cp = '\0';
2006 
2007  /*
2008  * Then read the rest of the field as a concatenated
2009  * time
2010  */
2011  dterr = DecodeNumberField(strlen(field[i]), field[i],
2012  (fmask | DTK_DATE_M),
2013  &tmask, tm,
2014  fsec, &is2digits);
2015  if (dterr < 0)
2016  return dterr;
2017  ftype[i] = dterr;
2018 
2019  tmask |= DTK_M(TZ);
2020  }
2021  else
2022  {
2023  namedTz = pg_tzset(field[i]);
2024  if (!namedTz)
2025  {
2026  extra->dtee_timezone = field[i];
2027  return DTERR_BAD_TIMEZONE;
2028  }
2029  /* we'll apply the zone setting below */
2030  ftype[i] = DTK_TZ;
2031  tmask = DTK_M(TZ);
2032  }
2033  }
2034  break;
2035 
2036  case DTK_TIME:
2037  dterr = DecodeTime(field[i], (fmask | DTK_DATE_M),
2039  &tmask, tm, fsec);
2040  if (dterr)
2041  return dterr;
2042  break;
2043 
2044  case DTK_TZ:
2045  {
2046  int tz;
2047 
2048  if (tzp == NULL)
2049  return DTERR_BAD_FORMAT;
2050 
2051  dterr = DecodeTimezone(field[i], &tz);
2052  if (dterr)
2053  return dterr;
2054  *tzp = tz;
2055  tmask = DTK_M(TZ);
2056  }
2057  break;
2058 
2059  case DTK_NUMBER:
2060 
2061  /*
2062  * Was this an "ISO time" with embedded field labels? An
2063  * example is "h04mm05s06" - thomas 2001-02-04
2064  */
2065  if (ptype != 0)
2066  {
2067  char *cp;
2068  int value;
2069 
2070  /* Only accept a date under limited circumstances */
2071  switch (ptype)
2072  {
2073  case DTK_JULIAN:
2074  case DTK_YEAR:
2075  case DTK_MONTH:
2076  case DTK_DAY:
2077  if (tzp == NULL)
2078  return DTERR_BAD_FORMAT;
2079  default:
2080  break;
2081  }
2082 
2083  errno = 0;
2084  value = strtoint(field[i], &cp, 10);
2085  if (errno == ERANGE)
2086  return DTERR_FIELD_OVERFLOW;
2087 
2088  /*
2089  * only a few kinds are allowed to have an embedded
2090  * decimal
2091  */
2092  if (*cp == '.')
2093  switch (ptype)
2094  {
2095  case DTK_JULIAN:
2096  case DTK_TIME:
2097  case DTK_SECOND:
2098  break;
2099  default:
2100  return DTERR_BAD_FORMAT;
2101  break;
2102  }
2103  else if (*cp != '\0')
2104  return DTERR_BAD_FORMAT;
2105 
2106  switch (ptype)
2107  {
2108  case DTK_YEAR:
2109  tm->tm_year = value;
2110  tmask = DTK_M(YEAR);
2111  break;
2112 
2113  case DTK_MONTH:
2114 
2115  /*
2116  * already have a month and hour? then assume
2117  * minutes
2118  */
2119  if ((fmask & DTK_M(MONTH)) != 0 &&
2120  (fmask & DTK_M(HOUR)) != 0)
2121  {
2122  tm->tm_min = value;
2123  tmask = DTK_M(MINUTE);
2124  }
2125  else
2126  {
2127  tm->tm_mon = value;
2128  tmask = DTK_M(MONTH);
2129  }
2130  break;
2131 
2132  case DTK_DAY:
2133  tm->tm_mday = value;
2134  tmask = DTK_M(DAY);
2135  break;
2136 
2137  case DTK_HOUR:
2138  tm->tm_hour = value;
2139  tmask = DTK_M(HOUR);
2140  break;
2141 
2142  case DTK_MINUTE:
2143  tm->tm_min = value;
2144  tmask = DTK_M(MINUTE);
2145  break;
2146 
2147  case DTK_SECOND:
2148  tm->tm_sec = value;
2149  tmask = DTK_M(SECOND);
2150  if (*cp == '.')
2151  {
2152  dterr = ParseFractionalSecond(cp, fsec);
2153  if (dterr)
2154  return dterr;
2155  tmask = DTK_ALL_SECS_M;
2156  }
2157  break;
2158 
2159  case DTK_TZ:
2160  tmask = DTK_M(TZ);
2161  dterr = DecodeTimezone(field[i], tzp);
2162  if (dterr)
2163  return dterr;
2164  break;
2165 
2166  case DTK_JULIAN:
2167  /* previous field was a label for "julian date" */
2168  if (value < 0)
2169  return DTERR_FIELD_OVERFLOW;
2170  tmask = DTK_DATE_M;
2171  j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2172  isjulian = true;
2173 
2174  if (*cp == '.')
2175  {
2176  double time;
2177 
2178  dterr = ParseFraction(cp, &time);
2179  if (dterr)
2180  return dterr;
2181  time *= USECS_PER_DAY;
2182  dt2time(time,
2183  &tm->tm_hour, &tm->tm_min,
2184  &tm->tm_sec, fsec);
2185  tmask |= DTK_TIME_M;
2186  }
2187  break;
2188 
2189  case DTK_TIME:
2190  /* previous field was "t" for ISO time */
2191  dterr = DecodeNumberField(strlen(field[i]), field[i],
2192  (fmask | DTK_DATE_M),
2193  &tmask, tm,
2194  fsec, &is2digits);
2195  if (dterr < 0)
2196  return dterr;
2197  ftype[i] = dterr;
2198 
2199  if (tmask != DTK_TIME_M)
2200  return DTERR_BAD_FORMAT;
2201  break;
2202 
2203  default:
2204  return DTERR_BAD_FORMAT;
2205  break;
2206  }
2207 
2208  ptype = 0;
2209  *dtype = DTK_DATE;
2210  }
2211  else
2212  {
2213  char *cp;
2214  int flen;
2215 
2216  flen = strlen(field[i]);
2217  cp = strchr(field[i], '.');
2218 
2219  /* Embedded decimal? */
2220  if (cp != NULL)
2221  {
2222  /*
2223  * Under limited circumstances, we will accept a
2224  * date...
2225  */
2226  if (i == 0 && nf >= 2 && ftype[nf - 1] == DTK_DATE)
2227  {
2228  dterr = DecodeDate(field[i], fmask,
2229  &tmask, &is2digits, tm);
2230  if (dterr)
2231  return dterr;
2232  }
2233  /* embedded decimal and several digits before? */
2234  else if (flen - strlen(cp) > 2)
2235  {
2236  /*
2237  * Interpret as a concatenated date or time Set
2238  * the type field to allow decoding other fields
2239  * later. Example: 20011223 or 040506
2240  */
2241  dterr = DecodeNumberField(flen, field[i],
2242  (fmask | DTK_DATE_M),
2243  &tmask, tm,
2244  fsec, &is2digits);
2245  if (dterr < 0)
2246  return dterr;
2247  ftype[i] = dterr;
2248  }
2249  else
2250  return DTERR_BAD_FORMAT;
2251  }
2252  else if (flen > 4)
2253  {
2254  dterr = DecodeNumberField(flen, field[i],
2255  (fmask | DTK_DATE_M),
2256  &tmask, tm,
2257  fsec, &is2digits);
2258  if (dterr < 0)
2259  return dterr;
2260  ftype[i] = dterr;
2261  }
2262  /* otherwise it is a single date/time field... */
2263  else
2264  {
2265  dterr = DecodeNumber(flen, field[i],
2266  false,
2267  (fmask | DTK_DATE_M),
2268  &tmask, tm,
2269  fsec, &is2digits);
2270  if (dterr)
2271  return dterr;
2272  }
2273  }
2274  break;
2275 
2276  case DTK_STRING:
2277  case DTK_SPECIAL:
2278  /* timezone abbrevs take precedence over built-in tokens */
2279  dterr = DecodeTimezoneAbbrev(i, field[i],
2280  &type, &val, &valtz, extra);
2281  if (dterr)
2282  return dterr;
2283  if (type == UNKNOWN_FIELD)
2284  type = DecodeSpecial(i, field[i], &val);
2285  if (type == IGNORE_DTF)
2286  continue;
2287 
2288  tmask = DTK_M(type);
2289  switch (type)
2290  {
2291  case RESERV:
2292  switch (val)
2293  {
2294  case DTK_NOW:
2295  tmask = DTK_TIME_M;
2296  *dtype = DTK_TIME;
2297  GetCurrentTimeUsec(tm, fsec, NULL);
2298  break;
2299 
2300  case DTK_ZULU:
2301  tmask = (DTK_TIME_M | DTK_M(TZ));
2302  *dtype = DTK_TIME;
2303  tm->tm_hour = 0;
2304  tm->tm_min = 0;
2305  tm->tm_sec = 0;
2306  tm->tm_isdst = 0;
2307  break;
2308 
2309  default:
2310  return DTERR_BAD_FORMAT;
2311  }
2312 
2313  break;
2314 
2315  case DTZMOD:
2316 
2317  /*
2318  * daylight savings time modifier (solves "MET DST"
2319  * syntax)
2320  */
2321  tmask |= DTK_M(DTZ);
2322  tm->tm_isdst = 1;
2323  if (tzp == NULL)
2324  return DTERR_BAD_FORMAT;
2325  *tzp -= val;
2326  break;
2327 
2328  case DTZ:
2329 
2330  /*
2331  * set mask for TZ here _or_ check for DTZ later when
2332  * getting default timezone
2333  */
2334  tmask |= DTK_M(TZ);
2335  tm->tm_isdst = 1;
2336  if (tzp == NULL)
2337  return DTERR_BAD_FORMAT;
2338  *tzp = -val;
2339  ftype[i] = DTK_TZ;
2340  break;
2341 
2342  case TZ:
2343  tm->tm_isdst = 0;
2344  if (tzp == NULL)
2345  return DTERR_BAD_FORMAT;
2346  *tzp = -val;
2347  ftype[i] = DTK_TZ;
2348  break;
2349 
2350  case DYNTZ:
2351  tmask |= DTK_M(TZ);
2352  if (tzp == NULL)
2353  return DTERR_BAD_FORMAT;
2354  /* we'll determine the actual offset later */
2355  abbrevTz = valtz;
2356  abbrev = field[i];
2357  ftype[i] = DTK_TZ;
2358  break;
2359 
2360  case AMPM:
2361  mer = val;
2362  break;
2363 
2364  case ADBC:
2365  bc = (val == BC);
2366  break;
2367 
2368  case UNITS:
2369  tmask = 0;
2370  ptype = val;
2371  break;
2372 
2373  case ISOTIME:
2374  tmask = 0;
2375 
2376  /***
2377  * We will need one of the following fields:
2378  * DTK_NUMBER should be hhmmss.fff
2379  * DTK_TIME should be hh:mm:ss.fff
2380  * DTK_DATE should be hhmmss-zz
2381  ***/
2382  if (i >= nf - 1 ||
2383  (ftype[i + 1] != DTK_NUMBER &&
2384  ftype[i + 1] != DTK_TIME &&
2385  ftype[i + 1] != DTK_DATE))
2386  return DTERR_BAD_FORMAT;
2387 
2388  ptype = val;
2389  break;
2390 
2391  case UNKNOWN_FIELD:
2392 
2393  /*
2394  * Before giving up and declaring error, check to see
2395  * if it is an all-alpha timezone name.
2396  */
2397  namedTz = pg_tzset(field[i]);
2398  if (!namedTz)
2399  return DTERR_BAD_FORMAT;
2400  /* we'll apply the zone setting below */
2401  tmask = DTK_M(TZ);
2402  break;
2403 
2404  default:
2405  return DTERR_BAD_FORMAT;
2406  }
2407  break;
2408 
2409  default:
2410  return DTERR_BAD_FORMAT;
2411  }
2412 
2413  if (tmask & fmask)
2414  return DTERR_BAD_FORMAT;
2415  fmask |= tmask;
2416  } /* end loop over fields */
2417 
2418  /* do final checking/adjustment of Y/M/D fields */
2419  dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
2420  if (dterr)
2421  return dterr;
2422 
2423  /* handle AM/PM */
2424  if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
2425  return DTERR_FIELD_OVERFLOW;
2426  if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
2427  tm->tm_hour = 0;
2428  else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
2429  tm->tm_hour += HOURS_PER_DAY / 2;
2430 
2431  /* check for time overflow */
2432  if (time_overflows(tm->tm_hour, tm->tm_min, tm->tm_sec, *fsec))
2433  return DTERR_FIELD_OVERFLOW;
2434 
2435  if ((fmask & DTK_TIME_M) != DTK_TIME_M)
2436  return DTERR_BAD_FORMAT;
2437 
2438  /*
2439  * If we had a full timezone spec, compute the offset (we could not do it
2440  * before, because we may need the date to resolve DST status).
2441  */
2442  if (namedTz != NULL)
2443  {
2444  long int gmtoff;
2445 
2446  /* daylight savings time modifier disallowed with full TZ */
2447  if (fmask & DTK_M(DTZMOD))
2448  return DTERR_BAD_FORMAT;
2449 
2450  /* if non-DST zone, we do not need to know the date */
2451  if (pg_get_timezone_offset(namedTz, &gmtoff))
2452  {
2453  *tzp = -(int) gmtoff;
2454  }
2455  else
2456  {
2457  /* a date has to be specified */
2458  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2459  return DTERR_BAD_FORMAT;
2460  *tzp = DetermineTimeZoneOffset(tm, namedTz);
2461  }
2462  }
2463 
2464  /*
2465  * Likewise, if we had a dynamic timezone abbreviation, resolve it now.
2466  */
2467  if (abbrevTz != NULL)
2468  {
2469  struct pg_tm tt,
2470  *tmp = &tt;
2471 
2472  /*
2473  * daylight savings time modifier but no standard timezone? then error
2474  */
2475  if (fmask & DTK_M(DTZMOD))
2476  return DTERR_BAD_FORMAT;
2477 
2478  if ((fmask & DTK_DATE_M) == 0)
2479  GetCurrentDateTime(tmp);
2480  else
2481  {
2482  /* a date has to be specified */
2483  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2484  return DTERR_BAD_FORMAT;
2485  tmp->tm_year = tm->tm_year;
2486  tmp->tm_mon = tm->tm_mon;
2487  tmp->tm_mday = tm->tm_mday;
2488  }
2489  tmp->tm_hour = tm->tm_hour;
2490  tmp->tm_min = tm->tm_min;
2491  tmp->tm_sec = tm->tm_sec;
2492  *tzp = DetermineTimeZoneAbbrevOffset(tmp, abbrev, abbrevTz);
2493  tm->tm_isdst = tmp->tm_isdst;
2494  }
2495 
2496  /* timezone not specified? then use session timezone */
2497  if (tzp != NULL && !(fmask & DTK_M(TZ)))
2498  {
2499  struct pg_tm tt,
2500  *tmp = &tt;
2501 
2502  /*
2503  * daylight savings time modifier but no standard timezone? then error
2504  */
2505  if (fmask & DTK_M(DTZMOD))
2506  return DTERR_BAD_FORMAT;
2507 
2508  if ((fmask & DTK_DATE_M) == 0)
2509  GetCurrentDateTime(tmp);
2510  else
2511  {
2512  /* a date has to be specified */
2513  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2514  return DTERR_BAD_FORMAT;
2515  tmp->tm_year = tm->tm_year;
2516  tmp->tm_mon = tm->tm_mon;
2517  tmp->tm_mday = tm->tm_mday;
2518  }
2519  tmp->tm_hour = tm->tm_hour;
2520  tmp->tm_min = tm->tm_min;
2521  tmp->tm_sec = tm->tm_sec;
2523  tm->tm_isdst = tmp->tm_isdst;
2524  }
2525 
2526  return 0;
2527 }
bool pg_get_timezone_offset(const pg_tz *tz, long int *gmtoff)
Definition: localtime.c:1851

References ADBC, AM, AMPM, BC, DAY, DecodeDate(), DecodeNumber(), DecodeNumberField(), DecodeSpecial(), DecodeTime(), DecodeTimezone(), DecodeTimezoneAbbrev(), DetermineTimeZoneAbbrevOffset(), DetermineTimeZoneOffset(), dt2time(), DateTimeErrorExtra::dtee_timezone, DTERR_BAD_FORMAT, DTERR_BAD_TIMEZONE, DTERR_FIELD_OVERFLOW, DTK_ALL_SECS_M, DTK_DATE, DTK_DATE_M, DTK_DAY, DTK_HOUR, DTK_JULIAN, DTK_M, DTK_MINUTE, DTK_MONTH, DTK_NOW, DTK_NUMBER, DTK_SECOND, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TIME_M, DTK_TZ, DTK_YEAR, DTK_ZULU, DTZ, DTZMOD, DYNTZ, GetCurrentDateTime(), GetCurrentTimeUsec(), HOUR, HOURS_PER_DAY, HR24, i, IGNORE_DTF, INTERVAL_FULL_RANGE, ISOTIME, j2date(), MINUTE, MONTH, ParseFraction(), ParseFractionalSecond(), pg_get_timezone_offset(), pg_tzset(), PM, RESERV, SECOND, session_timezone, strtoint(), time_overflows(), tm, 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, generate_unaccent_rules::type, TZ, UNITS, UNKNOWN_FIELD, USECS_PER_DAY, val, ValidateDate(), value, and YEAR.

Referenced by time_in(), and timetz_in().

◆ DecodeTimezone()

int DecodeTimezone ( const char *  str,
int *  tzp 
)

Definition at line 3149 of file datetime.c.

3150 {
3151  int tz;
3152  int hr,
3153  min,
3154  sec = 0;
3155  char *cp;
3156 
3157  /* leading character must be "+" or "-" */
3158  if (*str != '+' && *str != '-')
3159  return DTERR_BAD_FORMAT;
3160 
3161  errno = 0;
3162  hr = strtoint(str + 1, &cp, 10);
3163  if (errno == ERANGE)
3164  return DTERR_TZDISP_OVERFLOW;
3165 
3166  /* explicit delimiter? */
3167  if (*cp == ':')
3168  {
3169  errno = 0;
3170  min = strtoint(cp + 1, &cp, 10);
3171  if (errno == ERANGE)
3172  return DTERR_TZDISP_OVERFLOW;
3173  if (*cp == ':')
3174  {
3175  errno = 0;
3176  sec = strtoint(cp + 1, &cp, 10);
3177  if (errno == ERANGE)
3178  return DTERR_TZDISP_OVERFLOW;
3179  }
3180  }
3181  /* otherwise, might have run things together... */
3182  else if (*cp == '\0' && strlen(str) > 3)
3183  {
3184  min = hr % 100;
3185  hr = hr / 100;
3186  /* we could, but don't, support a run-together hhmmss format */
3187  }
3188  else
3189  min = 0;
3190 
3191  /* Range-check the values; see notes in datatype/timestamp.h */
3192  if (hr < 0 || hr > MAX_TZDISP_HOUR)
3193  return DTERR_TZDISP_OVERFLOW;
3194  if (min < 0 || min >= MINS_PER_HOUR)
3195  return DTERR_TZDISP_OVERFLOW;
3196  if (sec < 0 || sec >= SECS_PER_MINUTE)
3197  return DTERR_TZDISP_OVERFLOW;
3198 
3199  tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE + sec;
3200  if (*str == '-')
3201  tz = -tz;
3202 
3203  *tzp = -tz;
3204 
3205  if (*cp != '\0')
3206  return DTERR_BAD_FORMAT;
3207 
3208  return 0;
3209 }
#define MAX_TZDISP_HOUR
Definition: timestamp.h:142
#define MINS_PER_HOUR
Definition: timestamp.h:128
#define SECS_PER_MINUTE
Definition: timestamp.h:127

References DTERR_BAD_FORMAT, DTERR_TZDISP_OVERFLOW, MAX_TZDISP_HOUR, MINS_PER_HOUR, SECS_PER_MINUTE, generate_unaccent_rules::str, and strtoint().

Referenced by DecodeDateTime(), DecodeTimeOnly(), parse_datetime(), parse_sane_timezone(), and to_timestamp().

◆ DecodeTimezoneAbbrev()

int DecodeTimezoneAbbrev ( int  field,
const char *  lowtoken,
int *  ftype,
int *  offset,
pg_tz **  tz,
DateTimeErrorExtra extra 
)

Definition at line 3233 of file datetime.c.

3236 {
3237  const datetkn *tp;
3238 
3239  tp = abbrevcache[field];
3240  /* use strncmp so that we match truncated tokens */
3241  if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
3242  {
3243  if (zoneabbrevtbl)
3244  tp = datebsearch(lowtoken, zoneabbrevtbl->abbrevs,
3246  else
3247  tp = NULL;
3248  }
3249  if (tp == NULL)
3250  {
3251  *ftype = UNKNOWN_FIELD;
3252  *offset = 0;
3253  *tz = NULL;
3254  }
3255  else
3256  {
3257  abbrevcache[field] = tp;
3258  *ftype = tp->type;
3259  if (tp->type == DYNTZ)
3260  {
3261  *offset = 0;
3262  *tz = FetchDynamicTimeZone(zoneabbrevtbl, tp, extra);
3263  if (*tz == NULL)
3264  return DTERR_BAD_ZONE_ABBREV;
3265  }
3266  else
3267  {
3268  *offset = tp->value;
3269  *tz = NULL;
3270  }
3271  }
3272 
3273  return 0;
3274 }
static const datetkn * abbrevcache[MAXDATEFIELDS]
Definition: datetime.c:262
static TimeZoneAbbrevTable * zoneabbrevtbl
Definition: datetime.c:254
static pg_tz * FetchDynamicTimeZone(TimeZoneAbbrevTable *tbl, const datetkn *tp, DateTimeErrorExtra *extra)
Definition: datetime.c:4920

References abbrevcache, TimeZoneAbbrevTable::abbrevs, datebsearch(), DTERR_BAD_ZONE_ABBREV, DYNTZ, FetchDynamicTimeZone(), TimeZoneAbbrevTable::numabbrevs, datetkn::token, TOKMAXLEN, datetkn::type, UNKNOWN_FIELD, datetkn::value, and zoneabbrevtbl.

Referenced by DecodeDateTime(), DecodeTimeOnly(), parse_sane_timezone(), timestamp_zone(), timestamptz_trunc_zone(), timestamptz_zone(), and timetz_zone().

◆ DecodeUnits()

int DecodeUnits ( int  field,
const char *  lowtoken,
int *  val 
)

Definition at line 3997 of file datetime.c.

3998 {
3999  int type;
4000  const datetkn *tp;
4001 
4002  tp = deltacache[field];
4003  /* use strncmp so that we match truncated tokens */
4004  if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
4005  {
4006  tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
4007  }
4008  if (tp == NULL)
4009  {
4010  type = UNKNOWN_FIELD;
4011  *val = 0;
4012  }
4013  else
4014  {
4015  deltacache[field] = tp;
4016  type = tp->type;
4017  *val = tp->value;
4018  }
4019 
4020  return type;
4021 } /* DecodeUnits() */
static const datetkn * deltacache[MAXDATEFIELDS]
Definition: datetime.c:260

References datebsearch(), deltacache, deltatktbl, szdeltatktbl, datetkn::token, TOKMAXLEN, generate_unaccent_rules::type, datetkn::type, UNKNOWN_FIELD, val, and datetkn::value.

Referenced by DecodeInterval(), extract_date(), interval_part_common(), interval_trunc(), time_part_common(), timestamp_part_common(), timestamp_trunc(), timestamptz_part_common(), timestamptz_trunc_internal(), and timetz_part_common().

◆ DetermineTimeZoneAbbrevOffset()

int DetermineTimeZoneAbbrevOffset ( struct pg_tm tm,
const char *  abbr,
pg_tz tzp 
)

Definition at line 1810 of file datetime.c.

1811 {
1812  pg_time_t t;
1813  int zone_offset;
1814  int abbr_offset;
1815  int abbr_isdst;
1816 
1817  /*
1818  * Compute the UTC time we want to probe at. (In event of overflow, we'll
1819  * probe at the epoch, which is a bit random but probably doesn't matter.)
1820  */
1821  zone_offset = DetermineTimeZoneOffsetInternal(tm, tzp, &t);
1822 
1823  /*
1824  * Try to match the abbreviation to something in the zone definition.
1825  */
1826  if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1827  &abbr_offset, &abbr_isdst))
1828  {
1829  /* Success, so use the abbrev-specific answers. */
1830  tm->tm_isdst = abbr_isdst;
1831  return abbr_offset;
1832  }
1833 
1834  /*
1835  * No match, so use the answers we already got from
1836  * DetermineTimeZoneOffsetInternal.
1837  */
1838  return zone_offset;
1839 }
static int DetermineTimeZoneOffsetInternal(struct pg_tm *tm, pg_tz *tzp, pg_time_t *tp)
Definition: datetime.c:1671
static bool DetermineTimeZoneAbbrevOffsetInternal(pg_time_t t, const char *abbr, pg_tz *tzp, int *offset, int *isdst)
Definition: datetime.c:1885
int64 pg_time_t
Definition: pgtime.h:23

References DetermineTimeZoneAbbrevOffsetInternal(), DetermineTimeZoneOffsetInternal(), tm, and pg_tm::tm_isdst.

Referenced by DecodeDateTime(), DecodeTimeOnly(), parse_sane_timezone(), and timestamp_zone().

◆ DetermineTimeZoneAbbrevOffsetTS()

int DetermineTimeZoneAbbrevOffsetTS ( TimestampTz  ts,
const char *  abbr,
pg_tz tzp,
int *  isdst 
)

Definition at line 1848 of file datetime.c.

1850 {
1852  int zone_offset;
1853  int abbr_offset;
1854  int tz;
1855  struct pg_tm tm;
1856  fsec_t fsec;
1857 
1858  /*
1859  * If the abbrev matches anything in the zone data, this is pretty easy.
1860  */
1861  if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1862  &abbr_offset, isdst))
1863  return abbr_offset;
1864 
1865  /*
1866  * Else, break down the timestamp so we can use DetermineTimeZoneOffset.
1867  */
1868  if (timestamp2tm(ts, &tz, &tm, &fsec, NULL, tzp) != 0)
1869  ereport(ERROR,
1870  (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
1871  errmsg("timestamp out of range")));
1872 
1873  zone_offset = DetermineTimeZoneOffset(&tm, tzp);
1874  *isdst = tm.tm_isdst;
1875  return zone_offset;
1876 }
int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm *tm, fsec_t *fsec, const char **tzn, pg_tz *attimezone)
Definition: timestamp.c:1842
pg_time_t timestamptz_to_time_t(TimestampTz t)
Definition: timestamp.c:1774
int32 fsec_t
Definition: timestamp.h:41
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149

References DetermineTimeZoneAbbrevOffsetInternal(), DetermineTimeZoneOffset(), ereport, errcode(), errmsg(), ERROR, timestamp2tm(), timestamptz_to_time_t(), tm, and pg_tm::tm_isdst.

Referenced by pg_timezone_abbrevs(), timestamptz_zone(), and timetz_zone().

◆ DetermineTimeZoneOffset()

◆ EncodeDateOnly()

void EncodeDateOnly ( struct pg_tm tm,
int  style,
char *  str 
)

Definition at line 4177 of file datetime.c.

4178 {
4179  Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4180 
4181  switch (style)
4182  {
4183  case USE_ISO_DATES:
4184  case USE_XSD_DATES:
4185  /* compatible with ISO date formats */
4187  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4188  *str++ = '-';
4190  *str++ = '-';
4192  break;
4193 
4194  case USE_SQL_DATES:
4195  /* compatible with Oracle/Ingres date formats */
4196  if (DateOrder == DATEORDER_DMY)
4197  {
4199  *str++ = '/';
4201  }
4202  else
4203  {
4205  *str++ = '/';
4207  }
4208  *str++ = '/';
4210  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4211  break;
4212 
4213  case USE_GERMAN_DATES:
4214  /* German-style date format */
4216  *str++ = '.';
4218  *str++ = '.';
4220  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4221  break;
4222 
4223  case USE_POSTGRES_DATES:
4224  default:
4225  /* traditional date-only style for Postgres */
4226  if (DateOrder == DATEORDER_DMY)
4227  {
4229  *str++ = '-';
4231  }
4232  else
4233  {
4235  *str++ = '-';
4237  }
4238  *str++ = '-';
4240  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4241  break;
4242  }
4243 
4244  if (tm->tm_year <= 0)
4245  {
4246  memcpy(str, " BC", 3); /* Don't copy NUL */
4247  str += 3;
4248  }
4249  *str = '\0';
4250 }
int DateOrder
Definition: globals.c:120
#define USE_SQL_DATES
Definition: miscadmin.h:231
#define USE_POSTGRES_DATES
Definition: miscadmin.h:229
#define USE_ISO_DATES
Definition: miscadmin.h:230
#define DATEORDER_DMY
Definition: miscadmin.h:237
#define USE_XSD_DATES
Definition: miscadmin.h:233
#define USE_GERMAN_DATES
Definition: miscadmin.h:232
char * pg_ultostr_zeropad(char *str, uint32 value, int32 minwidth)
Definition: numutils.c:578

References Assert(), DateOrder, DATEORDER_DMY, MONTHS_PER_YEAR, pg_ultostr_zeropad(), generate_unaccent_rules::str, tm, pg_tm::tm_mday, pg_tm::tm_mon, pg_tm::tm_year, USE_GERMAN_DATES, USE_ISO_DATES, USE_POSTGRES_DATES, USE_SQL_DATES, and USE_XSD_DATES.

Referenced by date_out(), JsonEncodeDateTime(), map_sql_value_to_xml_value(), and PGTYPESdate_to_asc().

◆ EncodeDateTime()

void EncodeDateTime ( struct pg_tm tm,
fsec_t  fsec,
bool  print_tz,
int  tz,
const char *  tzn,
int  style,
char *  str 
)

Definition at line 4292 of file datetime.c.

4293 {
4294  int day;
4295 
4296  Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4297 
4298  /*
4299  * Negative tm_isdst means we have no valid time zone translation.
4300  */
4301  if (tm->tm_isdst < 0)
4302  print_tz = false;
4303 
4304  switch (style)
4305  {
4306  case USE_ISO_DATES:
4307  case USE_XSD_DATES:
4308  /* Compatible with ISO-8601 date formats */
4310  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4311  *str++ = '-';
4313  *str++ = '-';
4315  *str++ = (style == USE_ISO_DATES) ? ' ' : 'T';
4317  *str++ = ':';
4319  *str++ = ':';
4320  str = AppendTimestampSeconds(str, tm, fsec);
4321  if (print_tz)
4322  str = EncodeTimezone(str, tz, style);
4323  break;
4324 
4325  case USE_SQL_DATES:
4326  /* Compatible with Oracle/Ingres date formats */
4327  if (DateOrder == DATEORDER_DMY)
4328  {
4330  *str++ = '/';
4332  }
4333  else
4334  {
4336  *str++ = '/';
4338  }
4339  *str++ = '/';
4341  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4342  *str++ = ' ';
4344  *str++ = ':';
4346  *str++ = ':';
4347  str = AppendTimestampSeconds(str, tm, fsec);
4348 
4349  /*
4350  * Note: the uses of %.*s in this function would be risky if the
4351  * timezone names ever contain non-ASCII characters, since we are
4352  * not being careful to do encoding-aware clipping. However, all
4353  * TZ abbreviations in the IANA database are plain ASCII.
4354  */
4355  if (print_tz)
4356  {
4357  if (tzn)
4358  {
4359  sprintf(str, " %.*s", MAXTZLEN, tzn);
4360  str += strlen(str);
4361  }
4362  else
4363  str = EncodeTimezone(str, tz, style);
4364  }
4365  break;
4366 
4367  case USE_GERMAN_DATES:
4368  /* German variant on European style */
4370  *str++ = '.';
4372  *str++ = '.';
4374  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4375  *str++ = ' ';
4377  *str++ = ':';
4379  *str++ = ':';
4380  str = AppendTimestampSeconds(str, tm, fsec);
4381 
4382  if (print_tz)
4383  {
4384  if (tzn)
4385  {
4386  sprintf(str, " %.*s", MAXTZLEN, tzn);
4387  str += strlen(str);
4388  }
4389  else
4390  str = EncodeTimezone(str, tz, style);
4391  }
4392  break;
4393 
4394  case USE_POSTGRES_DATES:
4395  default:
4396  /* Backward-compatible with traditional Postgres abstime dates */
4397  day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
4398  tm->tm_wday = j2day(day);
4399  memcpy(str, days[tm->tm_wday], 3);
4400  str += 3;
4401  *str++ = ' ';
4402  if (DateOrder == DATEORDER_DMY)
4403  {
4405  *str++ = ' ';
4406  memcpy(str, months[tm->tm_mon - 1], 3);
4407  str += 3;
4408  }
4409  else
4410  {
4411  memcpy(str, months[tm->tm_mon - 1], 3);
4412  str += 3;
4413  *str++ = ' ';
4415  }
4416  *str++ = ' ';
4418  *str++ = ':';
4420  *str++ = ':';
4421  str = AppendTimestampSeconds(str, tm, fsec);
4422  *str++ = ' ';
4424  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4425 
4426  if (print_tz)
4427  {
4428  if (tzn)
4429  {
4430  sprintf(str, " %.*s", MAXTZLEN, tzn);
4431  str += strlen(str);
4432  }
4433  else
4434  {
4435  /*
4436  * We have a time zone, but no string version. Use the
4437  * numeric form, but be sure to include a leading space to
4438  * avoid formatting something which would be rejected by
4439  * the date/time parser later. - thomas 2001-10-19
4440  */
4441  *str++ = ' ';
4442  str = EncodeTimezone(str, tz, style);
4443  }
4444  }
4445  break;
4446  }
4447 
4448  if (tm->tm_year <= 0)
4449  {
4450  memcpy(str, " BC", 3); /* Don't copy NUL */
4451  str += 3;
4452  }
4453  *str = '\0';
4454 }
static char * EncodeTimezone(char *str, int tz, int style)
Definition: datetime.c:4139
int j2day(int date)
Definition: datetime.c:344
const char *const months[]
Definition: datetime.c:82
static char * AppendTimestampSeconds(char *cp, struct pg_tm *tm, fsec_t fsec)
Definition: datetime.c:511
const char *const days[]
Definition: datetime.c:85
#define MAXTZLEN
Definition: miscadmin.h:257
#define sprintf
Definition: port.h:240

References AppendTimestampSeconds(), Assert(), date2j(), DateOrder, DATEORDER_DMY, days, EncodeTimezone(), j2day(), MAXTZLEN, months, MONTHS_PER_YEAR, pg_ultostr_zeropad(), sprintf, generate_unaccent_rules::str, tm, pg_tm::tm_hour, pg_tm::tm_isdst, pg_tm::tm_mday, pg_tm::tm_min, pg_tm::tm_mon, pg_tm::tm_wday, pg_tm::tm_year, USE_GERMAN_DATES, USE_ISO_DATES, USE_POSTGRES_DATES, USE_SQL_DATES, and USE_XSD_DATES.

Referenced by JsonEncodeDateTime(), map_sql_value_to_xml_value(), PGTYPEStimestamp_to_asc(), timestamp_out(), timestamptz_out(), and timestamptz_to_str().

◆ EncodeInterval()

void EncodeInterval ( struct pg_itm itm,
int  style,
char *  str 
)

Definition at line 4535 of file datetime.c.

4536 {
4537  char *cp = str;
4538  int year = itm->tm_year;
4539  int mon = itm->tm_mon;
4540  int64 mday = itm->tm_mday; /* tm_mday could be INT_MIN */
4541  int64 hour = itm->tm_hour;
4542  int min = itm->tm_min;
4543  int sec = itm->tm_sec;
4544  int fsec = itm->tm_usec;
4545  bool is_before = false;
4546  bool is_zero = true;
4547 
4548  /*
4549  * The sign of year and month are guaranteed to match, since they are
4550  * stored internally as "month". But we'll need to check for is_before and
4551  * is_zero when determining the signs of day and hour/minute/seconds
4552  * fields.
4553  */
4554  switch (style)
4555  {
4556  /* SQL Standard interval format */
4557  case INTSTYLE_SQL_STANDARD:
4558  {
4559  bool has_negative = year < 0 || mon < 0 ||
4560  mday < 0 || hour < 0 ||
4561  min < 0 || sec < 0 || fsec < 0;
4562  bool has_positive = year > 0 || mon > 0 ||
4563  mday > 0 || hour > 0 ||
4564  min > 0 || sec > 0 || fsec > 0;
4565  bool has_year_month = year != 0 || mon != 0;
4566  bool has_day_time = mday != 0 || hour != 0 ||
4567  min != 0 || sec != 0 || fsec != 0;
4568  bool has_day = mday != 0;
4569  bool sql_standard_value = !(has_negative && has_positive) &&
4570  !(has_year_month && has_day_time);
4571 
4572  /*
4573  * SQL Standard wants only 1 "<sign>" preceding the whole
4574  * interval ... but can't do that if mixed signs.
4575  */
4576  if (has_negative && sql_standard_value)
4577  {
4578  *cp++ = '-';
4579  year = -year;
4580  mon = -mon;
4581  mday = -mday;
4582  hour = -hour;
4583  min = -min;
4584  sec = -sec;
4585  fsec = -fsec;
4586  }
4587 
4588  if (!has_negative && !has_positive)
4589  {
4590  sprintf(cp, "0");
4591  }
4592  else if (!sql_standard_value)
4593  {
4594  /*
4595  * For non sql-standard interval values, force outputting
4596  * the signs to avoid ambiguities with intervals with
4597  * mixed sign components.
4598  */
4599  char year_sign = (year < 0 || mon < 0) ? '-' : '+';
4600  char day_sign = (mday < 0) ? '-' : '+';
4601  char sec_sign = (hour < 0 || min < 0 ||
4602  sec < 0 || fsec < 0) ? '-' : '+';
4603 
4604  sprintf(cp, "%c%d-%d %c%lld %c%lld:%02d:",
4605  year_sign, abs(year), abs(mon),
4606  day_sign, (long long) i64abs(mday),
4607  sec_sign, (long long) i64abs(hour), abs(min));
4608  cp += strlen(cp);
4609  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4610  *cp = '\0';
4611  }
4612  else if (has_year_month)
4613  {
4614  sprintf(cp, "%d-%d", year, mon);
4615  }
4616  else if (has_day)
4617  {
4618  sprintf(cp, "%lld %lld:%02d:",
4619  (long long) mday, (long long) hour, min);
4620  cp += strlen(cp);
4621  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4622  *cp = '\0';
4623  }
4624  else
4625  {
4626  sprintf(cp, "%lld:%02d:", (long long) hour, min);
4627  cp += strlen(cp);
4628  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4629  *cp = '\0';
4630  }
4631  }
4632  break;
4633 
4634  /* ISO 8601 "time-intervals by duration only" */
4635  case INTSTYLE_ISO_8601:
4636  /* special-case zero to avoid printing nothing */
4637  if (year == 0 && mon == 0 && mday == 0 &&
4638  hour == 0 && min == 0 && sec == 0 && fsec == 0)
4639  {
4640  sprintf(cp, "PT0S");
4641  break;
4642  }
4643  *cp++ = 'P';
4644  cp = AddISO8601IntPart(cp, year, 'Y');
4645  cp = AddISO8601IntPart(cp, mon, 'M');
4646  cp = AddISO8601IntPart(cp, mday, 'D');
4647  if (hour != 0 || min != 0 || sec != 0 || fsec != 0)
4648  *cp++ = 'T';
4649  cp = AddISO8601IntPart(cp, hour, 'H');
4650  cp = AddISO8601IntPart(cp, min, 'M');
4651  if (sec != 0 || fsec != 0)
4652  {
4653  if (sec < 0 || fsec < 0)
4654  *cp++ = '-';
4655  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4656  *cp++ = 'S';
4657  *cp++ = '\0';
4658  }
4659  break;
4660 
4661  /* Compatible with postgresql < 8.4 when DateStyle = 'iso' */
4662  case INTSTYLE_POSTGRES:
4663  cp = AddPostgresIntPart(cp, year, "year", &is_zero, &is_before);
4664 
4665  /*
4666  * Ideally we should spell out "month" like we do for "year" and
4667  * "day". However, for backward compatibility, we can't easily
4668  * fix this. bjm 2011-05-24
4669  */
4670  cp = AddPostgresIntPart(cp, mon, "mon", &is_zero, &is_before);
4671  cp = AddPostgresIntPart(cp, mday, "day", &is_zero, &is_before);
4672  if (is_zero || hour != 0 || min != 0 || sec != 0 || fsec != 0)
4673  {
4674  bool minus = (hour < 0 || min < 0 || sec < 0 || fsec < 0);
4675 
4676  sprintf(cp, "%s%s%02lld:%02d:",
4677  is_zero ? "" : " ",
4678  (minus ? "-" : (is_before ? "+" : "")),
4679  (long long) i64abs(hour), abs(min));
4680  cp += strlen(cp);
4681  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4682  *cp = '\0';
4683  }
4684  break;
4685 
4686  /* Compatible with postgresql < 8.4 when DateStyle != 'iso' */
4688  default:
4689  strcpy(cp, "@");
4690  cp++;
4691  cp = AddVerboseIntPart(cp, year, "year", &is_zero, &is_before);
4692  cp = AddVerboseIntPart(cp, mon, "mon", &is_zero, &is_before);
4693  cp = AddVerboseIntPart(cp, mday, "day", &is_zero, &is_before);
4694  cp = AddVerboseIntPart(cp, hour, "hour", &is_zero, &is_before);
4695  cp = AddVerboseIntPart(cp, min, "min", &is_zero, &is_before);
4696  if (sec != 0 || fsec != 0)
4697  {
4698  *cp++ = ' ';
4699  if (sec < 0 || (sec == 0 && fsec < 0))
4700  {
4701  if (is_zero)
4702  is_before = true;
4703  else if (!is_before)
4704  *cp++ = '-';
4705  }
4706  else if (is_before)
4707  *cp++ = '-';
4708  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4709  /* We output "ago", not negatives, so use abs(). */
4710  sprintf(cp, " sec%s",
4711  (abs(sec) != 1 || fsec != 0) ? "s" : "");
4712  is_zero = false;
4713  }
4714  /* identically zero? then put in a unitless zero... */
4715  if (is_zero)
4716  strcat(cp, " 0");
4717  if (is_before)
4718  strcat(cp, " ago");
4719  break;
4720  }
4721 }
static char * AddVerboseIntPart(char *cp, int64 value, const char *units, bool *is_zero, bool *is_before)
Definition: datetime.c:4496
static char * AddPostgresIntPart(char *cp, int64 value, const char *units, bool *is_zero, bool *is_before)
Definition: datetime.c:4473
static char * AddISO8601IntPart(char *cp, int64 value, char units)
Definition: datetime.c:4463
static char * AppendSeconds(char *cp, int sec, fsec_t fsec, int precision, bool fillzeros)
Definition: datetime.c:448
#define i64abs(i)
Definition: c.h:1243
#define MAX_INTERVAL_PRECISION
Definition: timestamp.h:93
#define INTSTYLE_POSTGRES_VERBOSE
Definition: miscadmin.h:251
#define INTSTYLE_ISO_8601
Definition: miscadmin.h:253
#define INTSTYLE_POSTGRES
Definition: miscadmin.h:250
int64 tm_hour
Definition: timestamp.h:70
int tm_year
Definition: timestamp.h:73
int tm_mon
Definition: timestamp.h:72
int tm_mday
Definition: timestamp.h:71
int tm_sec
Definition: timestamp.h:68
int tm_min
Definition: timestamp.h:69
int tm_usec
Definition: timestamp.h:67

References AddISO8601IntPart(), AddPostgresIntPart(), AddVerboseIntPart(), AppendSeconds(), i64abs, INTSTYLE_ISO_8601, INTSTYLE_POSTGRES, INTSTYLE_POSTGRES_VERBOSE, INTSTYLE_SQL_STANDARD, MAX_INTERVAL_PRECISION, sprintf, generate_unaccent_rules::str, pg_itm::tm_hour, pg_itm::tm_mday, pg_itm::tm_min, pg_itm::tm_mon, pg_itm::tm_sec, pg_itm::tm_usec, and pg_itm::tm_year.

Referenced by interval_out().

◆ EncodeSpecialTimestamp()

void EncodeSpecialTimestamp ( Timestamp  dt,
char *  str 
)

Definition at line 1538 of file timestamp.c.

1539 {
1540  if (TIMESTAMP_IS_NOBEGIN(dt))
1541  strcpy(str, EARLY);
1542  else if (TIMESTAMP_IS_NOEND(dt))
1543  strcpy(str, LATE);
1544  else /* shouldn't happen */
1545  elog(ERROR, "invalid argument for EncodeSpecialTimestamp");
1546 }
#define TIMESTAMP_IS_NOEND(j)
Definition: timestamp.h:159
#define TIMESTAMP_IS_NOBEGIN(j)
Definition: timestamp.h:154
#define EARLY
Definition: datetime.h:39
#define LATE
Definition: datetime.h:40

References EARLY, elog(), ERROR, LATE, generate_unaccent_rules::str, TIMESTAMP_IS_NOBEGIN, and TIMESTAMP_IS_NOEND.

Referenced by JsonEncodeDateTime(), PGTYPEStimestamp_to_asc(), timestamp_out(), timestamptz_out(), and timestamptz_to_str().

◆ EncodeTimeOnly()

void EncodeTimeOnly ( struct pg_tm tm,
fsec_t  fsec,
bool  print_tz,
int  tz,
int  style,
char *  str 
)

Definition at line 4262 of file datetime.c.

4263 {
4265  *str++ = ':';
4267  *str++ = ':';
4268  str = AppendSeconds(str, tm->tm_sec, fsec, MAX_TIME_PRECISION, true);
4269  if (print_tz)
4270  str = EncodeTimezone(str, tz, style);
4271  *str = '\0';
4272 }
#define MAX_TIME_PRECISION
Definition: date.h:45

References AppendSeconds(), EncodeTimezone(), MAX_TIME_PRECISION, pg_ultostr_zeropad(), generate_unaccent_rules::str, tm, pg_tm::tm_hour, pg_tm::tm_min, and pg_tm::tm_sec.

Referenced by JsonEncodeDateTime(), time_out(), and timetz_out().

◆ GetCurrentDateTime()

void GetCurrentDateTime ( struct pg_tm tm)

Definition at line 366 of file datetime.c.

367 {
368  fsec_t fsec;
369 
370  GetCurrentTimeUsec(tm, &fsec, NULL);
371 }

References GetCurrentTimeUsec(), and tm.

Referenced by current_date(), DecodeDateTime(), DecodeTimeOnly(), PGTYPESdate_today(), PGTYPEStimestamp_current(), and time_timetz().

◆ GetCurrentTimeUsec()

void GetCurrentTimeUsec ( struct pg_tm tm,
fsec_t fsec,
int *  tzp 
)

Definition at line 387 of file datetime.c.

388 {
390 
391  /*
392  * The cache key must include both current time and current timezone. By
393  * representing the timezone by just a pointer, we're assuming that
394  * distinct timezone settings could never have the same pointer value.
395  * This is true by virtue of the hashtable used inside pg_tzset();
396  * however, it might need another look if we ever allow entries in that
397  * hash to be recycled.
398  */
399  static TimestampTz cache_ts = 0;
400  static pg_tz *cache_timezone = NULL;
401  static struct pg_tm cache_tm;
402  static fsec_t cache_fsec;
403  static int cache_tz;
404 
405  if (cur_ts != cache_ts || session_timezone != cache_timezone)
406  {
407  /*
408  * Make sure cache is marked invalid in case of error after partial
409  * update within timestamp2tm.
410  */
411  cache_timezone = NULL;
412 
413  /*
414  * Perform the computation, storing results into cache. We do not
415  * really expect any error here, since current time surely ought to be
416  * within range, but check just for sanity's sake.
417  */
418  if (timestamp2tm(cur_ts, &cache_tz, &cache_tm, &cache_fsec,
419  NULL, session_timezone) != 0)
420  ereport(ERROR,
421  (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
422  errmsg("timestamp out of range")));
423 
424  /* OK, so mark the cache valid. */
425  cache_ts = cur_ts;
426  cache_timezone = session_timezone;
427  }
428 
429  *tm = cache_tm;
430  *fsec = cache_fsec;
431  if (tzp != NULL)
432  *tzp = cache_tz;
433 }
int64 TimestampTz
Definition: timestamp.h:39
TimestampTz GetCurrentTransactionStartTimestamp(void)
Definition: xact.c:854

References ereport, errcode(), errmsg(), ERROR, GetCurrentTransactionStartTimestamp(), session_timezone, timestamp2tm(), and tm.

Referenced by current_time(), DecodeDateTime(), DecodeTimeOnly(), GetCurrentDateTime(), and sql_localtime().

◆ InstallTimeZoneAbbrevs()

void InstallTimeZoneAbbrevs ( TimeZoneAbbrevTable tbl)

Definition at line 4907 of file datetime.c.

4908 {
4909  zoneabbrevtbl = tbl;
4910  /* reset abbrevcache, which may contain pointers into old table */
4911  memset(abbrevcache, 0, sizeof(abbrevcache));
4912 }

References abbrevcache, and zoneabbrevtbl.

Referenced by assign_timezone_abbreviations().

◆ j2date()

void j2date ( int  jd,
int *  year,
int *  month,
int *  day 
)

Definition at line 311 of file datetime.c.

312 {
313  unsigned int julian;
314  unsigned int quad;
315  unsigned int extra;
316  int y;
317 
318  julian = jd;
319  julian += 32044;
320  quad = julian / 146097;
321  extra = (julian - quad * 146097) * 4 + 3;
322  julian += 60 + quad * 3 + extra / 146097;
323  quad = julian / 1461;
324  julian -= quad * 1461;
325  y = julian * 4 / 1461;
326  julian = ((y != 0) ? ((julian + 305) % 365) : ((julian + 306) % 366))
327  + 123;
328  y += quad * 4;
329  *year = y - 4800;
330  quad = julian * 2141 / 65536;
331  *day = julian - 7834 * quad / 256;
332  *month = (quad + 10) % MONTHS_PER_YEAR + 1;
333 } /* j2date() */
int y
Definition: isn.c:72

◆ j2day()

int j2day ( int  date)

Definition at line 344 of file datetime.c.

345 {
346  date += 1;
347  date %= 7;
348  /* Cope if division truncates towards zero, as it probably does */
349  if (date < 0)
350  date += 7;
351 
352  return date;
353 } /* j2day() */
long date
Definition: pgtypes_date.h:9

Referenced by date2isoweek(), date2isoyear(), EncodeDateTime(), extract_date(), isoweek2j(), timestamp_part_common(), and timestamptz_part_common().

◆ ParseDateTime()

int ParseDateTime ( const char *  timestr,
char *  workbuf,
size_t  buflen,
char **  field,
int *  ftype,
int  maxfields,
int *  numfields 
)

Definition at line 754 of file datetime.c.

756 {
757  int nf = 0;
758  const char *cp = timestr;
759  char *bufp = workbuf;
760  const char *bufend = workbuf + buflen;
761 
762  /*
763  * Set the character pointed-to by "bufptr" to "newchar", and increment
764  * "bufptr". "end" gives the end of the buffer -- we return an error if
765  * there is no space left to append a character to the buffer. Note that
766  * "bufptr" is evaluated twice.
767  */
768 #define APPEND_CHAR(bufptr, end, newchar) \
769  do \
770  { \
771  if (((bufptr) + 1) >= (end)) \
772  return DTERR_BAD_FORMAT; \
773  *(bufptr)++ = newchar; \
774  } while (0)
775 
776  /* outer loop through fields */
777  while (*cp != '\0')
778  {
779  /* Ignore spaces between fields */
780  if (isspace((unsigned char) *cp))
781  {
782  cp++;
783  continue;
784  }
785 
786  /* Record start of current field */
787  if (nf >= maxfields)
788  return DTERR_BAD_FORMAT;
789  field[nf] = bufp;
790 
791  /* leading digit? then date or time */
792  if (isdigit((unsigned char) *cp))
793  {
794  APPEND_CHAR(bufp, bufend, *cp++);
795  while (isdigit((unsigned char) *cp))
796  APPEND_CHAR(bufp, bufend, *cp++);
797 
798  /* time field? */
799  if (*cp == ':')
800  {
801  ftype[nf] = DTK_TIME;
802  APPEND_CHAR(bufp, bufend, *cp++);
803  while (isdigit((unsigned char) *cp) ||
804  (*cp == ':') || (*cp == '.'))
805  APPEND_CHAR(bufp, bufend, *cp++);
806  }
807  /* date field? allow embedded text month */
808  else if (*cp == '-' || *cp == '/' || *cp == '.')
809  {
810  /* save delimiting character to use later */
811  char delim = *cp;
812 
813  APPEND_CHAR(bufp, bufend, *cp++);
814  /* second field is all digits? then no embedded text month */
815  if (isdigit((unsigned char) *cp))
816  {
817  ftype[nf] = ((delim == '.') ? DTK_NUMBER : DTK_DATE);
818  while (isdigit((unsigned char) *cp))
819  APPEND_CHAR(bufp, bufend, *cp++);
820 
821  /*
822  * insist that the delimiters match to get a three-field
823  * date.
824  */
825  if (*cp == delim)
826  {
827  ftype[nf] = DTK_DATE;
828  APPEND_CHAR(bufp, bufend, *cp++);
829  while (isdigit((unsigned char) *cp) || *cp == delim)
830  APPEND_CHAR(bufp, bufend, *cp++);
831  }
832  }
833  else
834  {
835  ftype[nf] = DTK_DATE;
836  while (isalnum((unsigned char) *cp) || *cp == delim)
837  APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
838  }
839  }
840 
841  /*
842  * otherwise, number only and will determine year, month, day, or
843  * concatenated fields later...
844  */
845  else
846  ftype[nf] = DTK_NUMBER;
847  }
848  /* Leading decimal point? Then fractional seconds... */
849  else if (*cp == '.')
850  {
851  APPEND_CHAR(bufp, bufend, *cp++);
852  while (isdigit((unsigned char) *cp))
853  APPEND_CHAR(bufp, bufend, *cp++);
854 
855  ftype[nf] = DTK_NUMBER;
856  }
857 
858  /*
859  * text? then date string, month, day of week, special, or timezone
860  */
861  else if (isalpha((unsigned char) *cp))
862  {
863  bool is_date;
864 
865  ftype[nf] = DTK_STRING;
866  APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
867  while (isalpha((unsigned char) *cp))
868  APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
869 
870  /*
871  * Dates can have embedded '-', '/', or '.' separators. It could
872  * also be a timezone name containing embedded '/', '+', '-', '_',
873  * or ':' (but '_' or ':' can't be the first punctuation). If the
874  * next character is a digit or '+', we need to check whether what
875  * we have so far is a recognized non-timezone keyword --- if so,
876  * don't believe that this is the start of a timezone.
877  */
878  is_date = false;
879  if (*cp == '-' || *cp == '/' || *cp == '.')
880  is_date = true;
881  else if (*cp == '+' || isdigit((unsigned char) *cp))
882  {
883  *bufp = '\0'; /* null-terminate current field value */
884  /* we need search only the core token table, not TZ names */
885  if (datebsearch(field[nf], datetktbl, szdatetktbl) == NULL)
886  is_date = true;
887  }
888  if (is_date)
889  {
890  ftype[nf] = DTK_DATE;
891  do
892  {
893  APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
894  } while (*cp == '+' || *cp == '-' ||
895  *cp == '/' || *cp == '_' ||
896  *cp == '.' || *cp == ':' ||
897  isalnum((unsigned char) *cp));
898  }
899  }
900  /* sign? then special or numeric timezone */
901  else if (*cp == '+' || *cp == '-')
902  {
903  APPEND_CHAR(bufp, bufend, *cp++);
904  /* soak up leading whitespace */
905  while (isspace((unsigned char) *cp))
906  cp++;
907  /* numeric timezone? */
908  /* note that "DTK_TZ" could also be a signed float or yyyy-mm */
909  if (isdigit((unsigned char) *cp))
910  {
911  ftype[nf] = DTK_TZ;
912  APPEND_CHAR(bufp, bufend, *cp++);
913  while (isdigit((unsigned char) *cp) ||
914  *cp == ':' || *cp == '.' || *cp == '-')
915  APPEND_CHAR(bufp, bufend, *cp++);
916  }
917  /* special? */
918  else if (isalpha((unsigned char) *cp))
919  {
920  ftype[nf] = DTK_SPECIAL;
921  APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
922  while (isalpha((unsigned char) *cp))
923  APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
924  }
925  /* otherwise something wrong... */
926  else
927  return DTERR_BAD_FORMAT;
928  }
929  /* ignore other punctuation but use as delimiter */
930  else if (ispunct((unsigned char) *cp))
931  {
932  cp++;
933  continue;
934  }
935  /* otherwise, something is not right... */
936  else
937  return DTERR_BAD_FORMAT;
938 
939  /* force in a delimiter after each field */
940  *bufp++ = '\0';
941  nf++;
942  }
943 
944  *numfields = nf;
945 
946  return 0;
947 }
#define APPEND_CHAR(bufptr, end, newchar)
unsigned char pg_tolower(unsigned char ch)
Definition: pgstrcasecmp.c:122

References APPEND_CHAR, datebsearch(), datetktbl, DTERR_BAD_FORMAT, DTK_DATE, DTK_NUMBER, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TZ, pg_tolower(), and szdatetktbl.

Referenced by check_recovery_target_time(), date_in(), interval_in(), pg_logdir_ls_internal(), PGTYPESdate_from_asc(), PGTYPESinterval_from_asc(), PGTYPEStimestamp_from_asc(), time_in(), timestamp_in(), timestamptz_in(), and timetz_in().

◆ TemporalSimplify()

struct Node* TemporalSimplify ( int32  max_precis,
struct Node node 
)

Definition at line 4790 of file datetime.c.

4791 {
4792  FuncExpr *expr = castNode(FuncExpr, node);
4793  Node *ret = NULL;
4794  Node *typmod;
4795 
4796  Assert(list_length(expr->args) >= 2);
4797 
4798  typmod = (Node *) lsecond(expr->args);
4799 
4800  if (IsA(typmod, Const) && !((Const *) typmod)->constisnull)
4801  {
4802  Node *source = (Node *) linitial(expr->args);
4803  int32 old_precis = exprTypmod(source);
4804  int32 new_precis = DatumGetInt32(((Const *) typmod)->constvalue);
4805 
4806  if (new_precis < 0 || new_precis == max_precis ||
4807  (old_precis >= 0 && new_precis >= old_precis))
4808  ret = relabel_to_typmod(source, new_precis);
4809  }
4810 
4811  return ret;
4812 }
int32 exprTypmod(const Node *expr)
Definition: nodeFuncs.c:266
Node * relabel_to_typmod(Node *expr, int32 typmod)
Definition: nodeFuncs.c:632
#define IsA(nodeptr, _type_)
Definition: nodes.h:168
#define castNode(_type_, nodeptr)
Definition: nodes.h:186
static int list_length(const List *l)
Definition: pg_list.h:150
#define linitial(l)
Definition: pg_list.h:176
#define lsecond(l)
Definition: pg_list.h:181
static rewind_source * source
Definition: pg_rewind.c:81
static int32 DatumGetInt32(Datum X)
Definition: postgres.h:550
List * args
Definition: primnodes.h:606
Definition: nodes.h:118

References FuncExpr::args, Assert(), castNode, DatumGetInt32(), exprTypmod(), IsA, linitial, list_length(), lsecond, relabel_to_typmod(), and source.

Referenced by time_support(), and timestamp_support().

◆ ValidateDate()

int ValidateDate ( int  fmask,
bool  isjulian,
bool  is2digits,
bool  bc,
struct pg_tm tm 
)

Definition at line 2650 of file datetime.c.

2652 {
2653  if (fmask & DTK_M(YEAR))
2654  {
2655  if (isjulian)
2656  {
2657  /* tm_year is correct and should not be touched */
2658  }
2659  else if (bc)
2660  {
2661  /* there is no year zero in AD/BC notation */
2662  if (tm->tm_year <= 0)
2663  return DTERR_FIELD_OVERFLOW;
2664  /* internally, we represent 1 BC as year zero, 2 BC as -1, etc */
2665  tm->tm_year = -(tm->tm_year - 1);
2666  }
2667  else if (is2digits)
2668  {
2669  /* process 1 or 2-digit input as 1970-2069 AD, allow '0' and '00' */
2670  if (tm->tm_year < 0) /* just paranoia */
2671  return DTERR_FIELD_OVERFLOW;
2672  if (tm->tm_year < 70)
2673  tm->tm_year += 2000;
2674  else if (tm->tm_year < 100)
2675  tm->tm_year += 1900;
2676  }
2677  else
2678  {
2679  /* there is no year zero in AD/BC notation */
2680  if (tm->tm_year <= 0)
2681  return DTERR_FIELD_OVERFLOW;
2682  }
2683  }
2684 
2685  /* now that we have correct year, decode DOY */
2686  if (fmask & DTK_M(DOY))
2687  {
2688  j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
2689  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2690  }
2691 
2692  /* check for valid month */
2693  if (fmask & DTK_M(MONTH))
2694  {
2695  if (tm->tm_mon < 1 || tm->tm_mon > MONTHS_PER_YEAR)
2696  return DTERR_MD_FIELD_OVERFLOW;
2697  }
2698 
2699  /* minimal check for valid day */
2700  if (fmask & DTK_M(DAY))
2701  {
2702  if (tm->tm_mday < 1 || tm->tm_mday > 31)
2703  return DTERR_MD_FIELD_OVERFLOW;
2704  }
2705 
2706  if ((fmask & DTK_DATE_M) == DTK_DATE_M)
2707  {
2708  /*
2709  * Check for valid day of month, now that we know for sure the month
2710  * and year. Note we don't use MD_FIELD_OVERFLOW here, since it seems
2711  * unlikely that "Feb 29" is a YMD-order error.
2712  */
2713  if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2714  return DTERR_FIELD_OVERFLOW;
2715  }
2716 
2717  return 0;
2718 }
const int day_tab[2][13]
Definition: datetime.c:76
#define isleap(y)
Definition: datetime.h:271
#define DOY
Definition: datetime.h:105
int tm_yday
Definition: pgtime.h:43

References date2j(), DAY, day_tab, DOY, DTERR_FIELD_OVERFLOW, DTERR_MD_FIELD_OVERFLOW, DTK_DATE_M, DTK_M, isleap, j2date(), MONTH, MONTHS_PER_YEAR, tm, pg_tm::tm_mday, pg_tm::tm_mon, pg_tm::tm_yday, pg_tm::tm_year, and YEAR.

Referenced by DecodeDateTime(), DecodeTimeOnly(), do_to_timestamp(), make_date(), and make_timestamp_internal().

Variable Documentation

◆ day_tab

PGDLLIMPORT const int day_tab[2][13]
extern

Definition at line 76 of file datetime.c.

◆ days

PGDLLIMPORT const char* const days[]
extern

Definition at line 85 of file datetime.c.

◆ months

PGDLLIMPORT const char* const months[]
extern

Definition at line 82 of file datetime.c.