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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)
 
#define TZNAME_FIXED_OFFSET   0
 
#define TZNAME_DYNTZ   1
 
#define TZNAME_ZONE   2
 

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 DecodeTimezoneName (const char *tzname, int *offset, pg_tz **tz)
 
pg_tzDecodeTimezoneNameToTz (const char *tzname)
 
int DecodeTimezoneAbbrevPrefix (const char *str, int *offset, pg_tz **tz)
 
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.

◆ TZNAME_DYNTZ

#define TZNAME_DYNTZ   1

Definition at line 300 of file datetime.h.

◆ TZNAME_FIXED_OFFSET

#define TZNAME_FIXED_OFFSET   0

Definition at line 299 of file datetime.h.

◆ TZNAME_ZONE

#define TZNAME_ZONE   2

Definition at line 301 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 366 of file timestamp.c.

367 {
368  static const int64 TimestampScales[MAX_TIMESTAMP_PRECISION + 1] = {
369  INT64CONST(1000000),
370  INT64CONST(100000),
371  INT64CONST(10000),
372  INT64CONST(1000),
373  INT64CONST(100),
374  INT64CONST(10),
375  INT64CONST(1)
376  };
377 
378  static const int64 TimestampOffsets[MAX_TIMESTAMP_PRECISION + 1] = {
379  INT64CONST(500000),
380  INT64CONST(50000),
381  INT64CONST(5000),
382  INT64CONST(500),
383  INT64CONST(50),
384  INT64CONST(5),
385  INT64CONST(0)
386  };
387 
388  if (!TIMESTAMP_NOT_FINITE(*time)
389  && (typmod != -1) && (typmod != MAX_TIMESTAMP_PRECISION))
390  {
391  if (typmod < 0 || typmod > MAX_TIMESTAMP_PRECISION)
392  ereturn(escontext, false,
393  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
394  errmsg("timestamp(%d) precision must be between %d and %d",
395  typmod, 0, MAX_TIMESTAMP_PRECISION)));
396 
397  if (*time >= INT64CONST(0))
398  {
399  *time = ((*time + TimestampOffsets[typmod]) / TimestampScales[typmod]) *
400  TimestampScales[typmod];
401  }
402  else
403  {
404  *time = -((((-*time) + TimestampOffsets[typmod]) / TimestampScales[typmod])
405  * TimestampScales[typmod]);
406  }
407  }
408 
409  return true;
410 }
#define MAX_TIMESTAMP_PRECISION
Definition: timestamp.h:92
#define TIMESTAMP_NOT_FINITE(j)
Definition: timestamp.h:169
int errcode(int sqlerrcode)
Definition: elog.c:859
int errmsg(const char *fmt,...)
Definition: elog.c:1072
#define ereturn(context, dummy_value,...)
Definition: elog.h:276

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

Referenced by executeDateTimeMethod(), GetSQLCurrentTimestamp(), GetSQLLocalTimestamp(), parse_datetime(), timestamp_in(), timestamp_recv(), timestamp_scale(), timestamptz_in(), timestamptz_recv(), timestamptz_scale(), and to_timestamp().

◆ CheckDateTokenTables()

bool CheckDateTokenTables ( void  )

Definition at line 4800 of file datetime.c.

4801 {
4802  bool ok = true;
4803 
4804  Assert(UNIX_EPOCH_JDATE == date2j(1970, 1, 1));
4805  Assert(POSTGRES_EPOCH_JDATE == date2j(2000, 1, 1));
4806 
4807  ok &= CheckDateTokenTable("datetktbl", datetktbl, szdatetktbl);
4808  ok &= CheckDateTokenTable("deltatktbl", deltatktbl, szdeltatktbl);
4809  return ok;
4810 }
static bool CheckDateTokenTable(const char *tablename, const datetkn *base, int nel)
Definition: datetime.c:4768
static const datetkn datetktbl[]
Definition: datetime.c:105
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:234
#define POSTGRES_EPOCH_JDATE
Definition: timestamp.h:235
Assert(fmt[strlen(fmt) - 1] !='\n')

◆ ConvertTimeZoneAbbrevs()

TimeZoneAbbrevTable* ConvertTimeZoneAbbrevs ( struct tzEntry abbrevs,
int  n 
)

Definition at line 4862 of file datetime.c.

4863 {
4864  TimeZoneAbbrevTable *tbl;
4865  Size tbl_size;
4866  int i;
4867 
4868  /* Space for fixed fields and datetkn array */
4869  tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
4870  n * sizeof(datetkn);
4871  tbl_size = MAXALIGN(tbl_size);
4872  /* Count up space for dynamic abbreviations */
4873  for (i = 0; i < n; i++)
4874  {
4875  struct tzEntry *abbr = abbrevs + i;
4876 
4877  if (abbr->zone != NULL)
4878  {
4879  Size dsize;
4880 
4881  dsize = offsetof(DynamicZoneAbbrev, zone) +
4882  strlen(abbr->zone) + 1;
4883  tbl_size += MAXALIGN(dsize);
4884  }
4885  }
4886 
4887  /* Alloc the result ... */
4888  tbl = guc_malloc(LOG, tbl_size);
4889  if (!tbl)
4890  return NULL;
4891 
4892  /* ... and fill it in */
4893  tbl->tblsize = tbl_size;
4894  tbl->numabbrevs = n;
4895  /* in this loop, tbl_size reprises the space calculation above */
4896  tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
4897  n * sizeof(datetkn);
4898  tbl_size = MAXALIGN(tbl_size);
4899  for (i = 0; i < n; i++)
4900  {
4901  struct tzEntry *abbr = abbrevs + i;
4902  datetkn *dtoken = tbl->abbrevs + i;
4903 
4904  /* use strlcpy to truncate name if necessary */
4905  strlcpy(dtoken->token, abbr->abbrev, TOKMAXLEN + 1);
4906  if (abbr->zone != NULL)
4907  {
4908  /* Allocate a DynamicZoneAbbrev for this abbreviation */
4909  DynamicZoneAbbrev *dtza;
4910  Size dsize;
4911 
4912  dtza = (DynamicZoneAbbrev *) ((char *) tbl + tbl_size);
4913  dtza->tz = NULL;
4914  strcpy(dtza->zone, abbr->zone);
4915 
4916  dtoken->type = DYNTZ;
4917  /* value is offset from table start to DynamicZoneAbbrev */
4918  dtoken->value = (int32) tbl_size;
4919 
4920  dsize = offsetof(DynamicZoneAbbrev, zone) +
4921  strlen(abbr->zone) + 1;
4922  tbl_size += MAXALIGN(dsize);
4923  }
4924  else
4925  {
4926  dtoken->type = abbr->is_dst ? DTZ : TZ;
4927  dtoken->value = abbr->offset;
4928  }
4929  }
4930 
4931  /* Assert the two loops above agreed on size calculations */
4932  Assert(tbl->tblsize == tbl_size);
4933 
4934  /* Check the ordering, if testing */
4935  Assert(CheckDateTokenTable("timezone abbreviations", tbl->abbrevs, n));
4936 
4937  return tbl;
4938 }
#define MAXALIGN(LEN)
Definition: c.h:798
signed int int32
Definition: c.h:481
size_t Size
Definition: c.h:592
#define LOG
Definition: elog.h:31
void * guc_malloc(int elevel, size_t size)
Definition: guc.c:640
#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 4081 of file datetime.c.

4084 {
4085  switch (dterr)
4086  {
4087  case DTERR_FIELD_OVERFLOW:
4088  errsave(escontext,
4089  (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4090  errmsg("date/time field value out of range: \"%s\"",
4091  str)));
4092  break;
4094  /* <nanny>same as above, but add hint about DateStyle</nanny> */
4095  errsave(escontext,
4096  (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4097  errmsg("date/time field value out of range: \"%s\"",
4098  str),
4099  errhint("Perhaps you need a different \"datestyle\" setting.")));
4100  break;
4102  errsave(escontext,
4103  (errcode(ERRCODE_INTERVAL_FIELD_OVERFLOW),
4104  errmsg("interval field value out of range: \"%s\"",
4105  str)));
4106  break;
4107  case DTERR_TZDISP_OVERFLOW:
4108  errsave(escontext,
4109  (errcode(ERRCODE_INVALID_TIME_ZONE_DISPLACEMENT_VALUE),
4110  errmsg("time zone displacement out of range: \"%s\"",
4111  str)));
4112  break;
4113  case DTERR_BAD_TIMEZONE:
4114  errsave(escontext,
4115  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4116  errmsg("time zone \"%s\" not recognized",
4117  extra->dtee_timezone)));
4118  break;
4119  case DTERR_BAD_ZONE_ABBREV:
4120  errsave(escontext,
4121  (errcode(ERRCODE_CONFIG_FILE_ERROR),
4122  errmsg("time zone \"%s\" not recognized",
4123  extra->dtee_timezone),
4124  errdetail("This time zone name appears in the configuration file for time zone abbreviation \"%s\".",
4125  extra->dtee_abbrev)));
4126  break;
4127  case DTERR_BAD_FORMAT:
4128  default:
4129  errsave(escontext,
4130  (errcode(ERRCODE_INVALID_DATETIME_FORMAT),
4131  errmsg("invalid input syntax for type %s: \"%s\"",
4132  datatype, str)));
4133  break;
4134  }
4135 }
int errdetail(const char *fmt,...)
Definition: elog.c:1205
int errhint(const char *fmt,...)
Definition: elog.c:1319
#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(), DecodeTimezoneName(), do_to_timestamp(), interval_in(), pg_timezone_abbrevs(), time_in(), timestamp_in(), timestamptz_in(), and timetz_in().

◆ 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 and Julian formats */
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  /*
1074  * Allow a preceding "t" field, but no other units.
1075  */
1076  if (ptype != 0)
1077  {
1078  /* Sanity check; should not fail this test */
1079  if (ptype != DTK_TIME)
1080  return DTERR_BAD_FORMAT;
1081  ptype = 0;
1082  }
1083 
1084  /*
1085  * Starts with a digit but we already have a time
1086  * field? Then we are in trouble with a date and time
1087  * already...
1088  */
1089  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1090  return DTERR_BAD_FORMAT;
1091 
1092  if ((cp = strchr(field[i], '-')) == NULL)
1093  return DTERR_BAD_FORMAT;
1094 
1095  /* Get the time zone from the end of the string */
1096  dterr = DecodeTimezone(cp, tzp);
1097  if (dterr)
1098  return dterr;
1099  *cp = '\0';
1100 
1101  /*
1102  * Then read the rest of the field as a concatenated
1103  * time
1104  */
1105  dterr = DecodeNumberField(strlen(field[i]), field[i],
1106  fmask,
1107  &tmask, tm,
1108  fsec, &is2digits);
1109  if (dterr < 0)
1110  return dterr;
1111 
1112  /*
1113  * modify tmask after returning from
1114  * DecodeNumberField()
1115  */
1116  tmask |= DTK_M(TZ);
1117  }
1118  else
1119  {
1120  namedTz = pg_tzset(field[i]);
1121  if (!namedTz)
1122  {
1123  extra->dtee_timezone = field[i];
1124  return DTERR_BAD_TIMEZONE;
1125  }
1126  /* we'll apply the zone setting below */
1127  tmask = DTK_M(TZ);
1128  }
1129  }
1130  else
1131  {
1132  dterr = DecodeDate(field[i], fmask,
1133  &tmask, &is2digits, tm);
1134  if (dterr)
1135  return dterr;
1136  }
1137  break;
1138 
1139  case DTK_TIME:
1140 
1141  /*
1142  * This might be an ISO time following a "t" field.
1143  */
1144  if (ptype != 0)
1145  {
1146  /* Sanity check; should not fail this test */
1147  if (ptype != DTK_TIME)
1148  return DTERR_BAD_FORMAT;
1149  ptype = 0;
1150  }
1151  dterr = DecodeTime(field[i], fmask, INTERVAL_FULL_RANGE,
1152  &tmask, tm, fsec);
1153  if (dterr)
1154  return dterr;
1155 
1156  /* check for time overflow */
1158  *fsec))
1159  return DTERR_FIELD_OVERFLOW;
1160  break;
1161 
1162  case DTK_TZ:
1163  {
1164  int tz;
1165 
1166  if (tzp == NULL)
1167  return DTERR_BAD_FORMAT;
1168 
1169  dterr = DecodeTimezone(field[i], &tz);
1170  if (dterr)
1171  return dterr;
1172  *tzp = tz;
1173  tmask = DTK_M(TZ);
1174  }
1175  break;
1176 
1177  case DTK_NUMBER:
1178 
1179  /*
1180  * Deal with cases where previous field labeled this one
1181  */
1182  if (ptype != 0)
1183  {
1184  char *cp;
1185  int value;
1186 
1187  errno = 0;
1188  value = strtoint(field[i], &cp, 10);
1189  if (errno == ERANGE)
1190  return DTERR_FIELD_OVERFLOW;
1191  if (*cp != '.' && *cp != '\0')
1192  return DTERR_BAD_FORMAT;
1193 
1194  switch (ptype)
1195  {
1196  case DTK_JULIAN:
1197  /* previous field was a label for "julian date" */
1198  if (value < 0)
1199  return DTERR_FIELD_OVERFLOW;
1200  tmask = DTK_DATE_M;
1201  j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1202  isjulian = true;
1203 
1204  /* fractional Julian Day? */
1205  if (*cp == '.')
1206  {
1207  double time;
1208 
1209  dterr = ParseFraction(cp, &time);
1210  if (dterr)
1211  return dterr;
1212  time *= USECS_PER_DAY;
1213  dt2time(time,
1214  &tm->tm_hour, &tm->tm_min,
1215  &tm->tm_sec, fsec);
1216  tmask |= DTK_TIME_M;
1217  }
1218  break;
1219 
1220  case DTK_TIME:
1221  /* previous field was "t" for ISO time */
1222  dterr = DecodeNumberField(strlen(field[i]), field[i],
1223  (fmask | DTK_DATE_M),
1224  &tmask, tm,
1225  fsec, &is2digits);
1226  if (dterr < 0)
1227  return dterr;
1228  if (tmask != DTK_TIME_M)
1229  return DTERR_BAD_FORMAT;
1230  break;
1231 
1232  default:
1233  return DTERR_BAD_FORMAT;
1234  break;
1235  }
1236 
1237  ptype = 0;
1238  *dtype = DTK_DATE;
1239  }
1240  else
1241  {
1242  char *cp;
1243  int flen;
1244 
1245  flen = strlen(field[i]);
1246  cp = strchr(field[i], '.');
1247 
1248  /* Embedded decimal and no date yet? */
1249  if (cp != NULL && !(fmask & DTK_DATE_M))
1250  {
1251  dterr = DecodeDate(field[i], fmask,
1252  &tmask, &is2digits, tm);
1253  if (dterr)
1254  return dterr;
1255  }
1256  /* embedded decimal and several digits before? */
1257  else if (cp != NULL && flen - strlen(cp) > 2)
1258  {
1259  /*
1260  * Interpret as a concatenated date or time Set the
1261  * type field to allow decoding other fields later.
1262  * Example: 20011223 or 040506
1263  */
1264  dterr = DecodeNumberField(flen, field[i], fmask,
1265  &tmask, tm,
1266  fsec, &is2digits);
1267  if (dterr < 0)
1268  return dterr;
1269  }
1270 
1271  /*
1272  * Is this a YMD or HMS specification, or a year number?
1273  * YMD and HMS are required to be six digits or more, so
1274  * if it is 5 digits, it is a year. If it is six or more
1275  * digits, we assume it is YMD or HMS unless no date and
1276  * no time values have been specified. This forces 6+
1277  * digit years to be at the end of the string, or to use
1278  * the ISO date specification.
1279  */
1280  else if (flen >= 6 && (!(fmask & DTK_DATE_M) ||
1281  !(fmask & DTK_TIME_M)))
1282  {
1283  dterr = DecodeNumberField(flen, field[i], fmask,
1284  &tmask, tm,
1285  fsec, &is2digits);
1286  if (dterr < 0)
1287  return dterr;
1288  }
1289  /* otherwise it is a single date/time field... */
1290  else
1291  {
1292  dterr = DecodeNumber(flen, field[i],
1293  haveTextMonth, fmask,
1294  &tmask, tm,
1295  fsec, &is2digits);
1296  if (dterr)
1297  return dterr;
1298  }
1299  }
1300  break;
1301 
1302  case DTK_STRING:
1303  case DTK_SPECIAL:
1304  /* timezone abbrevs take precedence over built-in tokens */
1305  dterr = DecodeTimezoneAbbrev(i, field[i],
1306  &type, &val, &valtz, extra);
1307  if (dterr)
1308  return dterr;
1309  if (type == UNKNOWN_FIELD)
1310  type = DecodeSpecial(i, field[i], &val);
1311  if (type == IGNORE_DTF)
1312  continue;
1313 
1314  tmask = DTK_M(type);
1315  switch (type)
1316  {
1317  case RESERV:
1318  switch (val)
1319  {
1320  case DTK_NOW:
1321  tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
1322  *dtype = DTK_DATE;
1323  GetCurrentTimeUsec(tm, fsec, tzp);
1324  break;
1325 
1326  case DTK_YESTERDAY:
1327  tmask = DTK_DATE_M;
1328  *dtype = DTK_DATE;
1329  GetCurrentDateTime(&cur_tm);
1330  j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) - 1,
1331  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1332  break;
1333 
1334  case DTK_TODAY:
1335  tmask = DTK_DATE_M;
1336  *dtype = DTK_DATE;
1337  GetCurrentDateTime(&cur_tm);
1338  tm->tm_year = cur_tm.tm_year;
1339  tm->tm_mon = cur_tm.tm_mon;
1340  tm->tm_mday = cur_tm.tm_mday;
1341  break;
1342 
1343  case DTK_TOMORROW:
1344  tmask = DTK_DATE_M;
1345  *dtype = DTK_DATE;
1346  GetCurrentDateTime(&cur_tm);
1347  j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) + 1,
1348  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1349  break;
1350 
1351  case DTK_ZULU:
1352  tmask = (DTK_TIME_M | DTK_M(TZ));
1353  *dtype = DTK_DATE;
1354  tm->tm_hour = 0;
1355  tm->tm_min = 0;
1356  tm->tm_sec = 0;
1357  if (tzp != NULL)
1358  *tzp = 0;
1359  break;
1360 
1361  case DTK_EPOCH:
1362  case DTK_LATE:
1363  case DTK_EARLY:
1364  tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
1365  *dtype = val;
1366  /* caller ignores tm for these dtype codes */
1367  break;
1368 
1369  default:
1370  elog(ERROR, "unrecognized RESERV datetime token: %d",
1371  val);
1372  }
1373 
1374  break;
1375 
1376  case MONTH:
1377 
1378  /*
1379  * already have a (numeric) month? then see if we can
1380  * substitute...
1381  */
1382  if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
1383  !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 &&
1384  tm->tm_mon <= 31)
1385  {
1386  tm->tm_mday = tm->tm_mon;
1387  tmask = DTK_M(DAY);
1388  }
1389  haveTextMonth = true;
1390  tm->tm_mon = val;
1391  break;
1392 
1393  case DTZMOD:
1394 
1395  /*
1396  * daylight savings time modifier (solves "MET DST"
1397  * syntax)
1398  */
1399  tmask |= DTK_M(DTZ);
1400  tm->tm_isdst = 1;
1401  if (tzp == NULL)
1402  return DTERR_BAD_FORMAT;
1403  *tzp -= val;
1404  break;
1405 
1406  case DTZ:
1407 
1408  /*
1409  * set mask for TZ here _or_ check for DTZ later when
1410  * getting default timezone
1411  */
1412  tmask |= DTK_M(TZ);
1413  tm->tm_isdst = 1;
1414  if (tzp == NULL)
1415  return DTERR_BAD_FORMAT;
1416  *tzp = -val;
1417  break;
1418 
1419  case TZ:
1420  tm->tm_isdst = 0;
1421  if (tzp == NULL)
1422  return DTERR_BAD_FORMAT;
1423  *tzp = -val;
1424  break;
1425 
1426  case DYNTZ:
1427  tmask |= DTK_M(TZ);
1428  if (tzp == NULL)
1429  return DTERR_BAD_FORMAT;
1430  /* we'll determine the actual offset later */
1431  abbrevTz = valtz;
1432  abbrev = field[i];
1433  break;
1434 
1435  case AMPM:
1436  mer = val;
1437  break;
1438 
1439  case ADBC:
1440  bc = (val == BC);
1441  break;
1442 
1443  case DOW:
1444  tm->tm_wday = val;
1445  break;
1446 
1447  case UNITS:
1448  tmask = 0;
1449  /* reject consecutive unhandled units */
1450  if (ptype != 0)
1451  return DTERR_BAD_FORMAT;
1452  ptype = val;
1453  break;
1454 
1455  case ISOTIME:
1456 
1457  /*
1458  * This is a filler field "t" indicating that the next
1459  * field is time. Try to verify that this is sensible.
1460  */
1461  tmask = 0;
1462 
1463  /* No preceding date? Then quit... */
1464  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1465  return DTERR_BAD_FORMAT;
1466 
1467  /* reject consecutive unhandled units */
1468  if (ptype != 0)
1469  return DTERR_BAD_FORMAT;
1470  ptype = val;
1471  break;
1472 
1473  case UNKNOWN_FIELD:
1474 
1475  /*
1476  * Before giving up and declaring error, check to see
1477  * if it is an all-alpha timezone name.
1478  */
1479  namedTz = pg_tzset(field[i]);
1480  if (!namedTz)
1481  return DTERR_BAD_FORMAT;
1482  /* we'll apply the zone setting below */
1483  tmask = DTK_M(TZ);
1484  break;
1485 
1486  default:
1487  return DTERR_BAD_FORMAT;
1488  }
1489  break;
1490 
1491  default:
1492  return DTERR_BAD_FORMAT;
1493  }
1494 
1495  if (tmask & fmask)
1496  return DTERR_BAD_FORMAT;
1497  fmask |= tmask;
1498  } /* end loop over fields */
1499 
1500  /* reject if prefix type appeared and was never handled */
1501  if (ptype != 0)
1502  return DTERR_BAD_FORMAT;
1503 
1504  /* do additional checking for normal date specs (but not "infinity" etc) */
1505  if (*dtype == DTK_DATE)
1506  {
1507  /* do final checking/adjustment of Y/M/D fields */
1508  dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
1509  if (dterr)
1510  return dterr;
1511 
1512  /* handle AM/PM */
1513  if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
1514  return DTERR_FIELD_OVERFLOW;
1515  if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
1516  tm->tm_hour = 0;
1517  else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
1518  tm->tm_hour += HOURS_PER_DAY / 2;
1519 
1520  /* check for incomplete input */
1521  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1522  {
1523  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1524  return 1;
1525  return DTERR_BAD_FORMAT;
1526  }
1527 
1528  /*
1529  * If we had a full timezone spec, compute the offset (we could not do
1530  * it before, because we need the date to resolve DST status).
1531  */
1532  if (namedTz != NULL)
1533  {
1534  /* daylight savings time modifier disallowed with full TZ */
1535  if (fmask & DTK_M(DTZMOD))
1536  return DTERR_BAD_FORMAT;
1537 
1538  *tzp = DetermineTimeZoneOffset(tm, namedTz);
1539  }
1540 
1541  /*
1542  * Likewise, if we had a dynamic timezone abbreviation, resolve it
1543  * now.
1544  */
1545  if (abbrevTz != NULL)
1546  {
1547  /* daylight savings time modifier disallowed with dynamic TZ */
1548  if (fmask & DTK_M(DTZMOD))
1549  return DTERR_BAD_FORMAT;
1550 
1551  *tzp = DetermineTimeZoneAbbrevOffset(tm, abbrev, abbrevTz);
1552  }
1553 
1554  /* timezone not specified? then use session timezone */
1555  if (tzp != NULL && !(fmask & DTK_M(TZ)))
1556  {
1557  /*
1558  * daylight savings time modifier but no standard timezone? then
1559  * error
1560  */
1561  if (fmask & DTK_M(DTZMOD))
1562  return DTERR_BAD_FORMAT;
1563 
1565  }
1566  }
1567 
1568  return 0;
1569 }
static int DecodeDate(char *str, int fmask, int *tmask, bool *is2digits, struct pg_tm *tm)
Definition: datetime.c:2387
static int DecodeNumberField(int len, char *str, int fmask, int *tmask, struct pg_tm *tm, fsec_t *fsec, bool *is2digits)
Definition: datetime.c:2901
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:2716
int DetermineTimeZoneOffset(struct pg_tm *tm, pg_tz *tzp)
Definition: datetime.c:1585
int DecodeTimezoneAbbrev(int field, const char *lowtoken, int *ftype, int *offset, pg_tz **tz, DateTimeErrorExtra *extra)
Definition: datetime.c:3080
static int DecodeTime(char *str, int fmask, int range, int *tmask, struct pg_tm *tm, fsec_t *fsec)
Definition: datetime.c:2661
int ValidateDate(int fmask, bool isjulian, bool is2digits, bool bc, struct pg_tm *tm)
Definition: datetime.c:2497
int DecodeSpecial(int field, const char *lowtoken, int *val)
Definition: datetime.c:3137
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:2996
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:1746
void dt2time(Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec)
Definition: timestamp.c:1874
#define USECS_PER_DAY
Definition: timestamp.h:131
#define HOURS_PER_DAY
Definition: timestamp.h:118
bool time_overflows(int hour, int min, int sec, fsec_t fsec)
Definition: date.c:1427
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:224
#define DTK_TOMORROW
Definition: datetime.h:156
#define DTK_EPOCH
Definition: datetime.h:152
#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 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 DAY
Definition: datetime.h:93
#define ADBC
Definition: datetime.h:108
#define DTK_LATE
Definition: datetime.h:151
#define DTK_DATE
Definition: datetime.h:144
#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 DTK_EARLY
Definition: datetime.h:150
#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 AM
Definition: datetime.h:71
#define DTK_YESTERDAY
Definition: datetime.h:154
#define DTK_ZULU
Definition: datetime.h:157
#define UNITS
Definition: datetime.h:107
#define DTK_TODAY
Definition: datetime.h:155
#define DTK_NOW
Definition: datetime.h:153
static struct @154 value
long val
Definition: informix.c:670
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
const char * type

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_DATE, DTK_DATE_M, DTK_EARLY, DTK_EPOCH, DTK_JULIAN, DTK_LATE, DTK_M, DTK_NOW, DTK_NUMBER, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TIME_M, DTK_TODAY, DTK_TOMORROW, DTK_TZ, DTK_YESTERDAY, DTK_ZULU, DTZ, DTZMOD, DYNTZ, elog, ERROR, GetCurrentDateTime(), GetCurrentTimeUsec(), HOURS_PER_DAY, HR24, i, IGNORE_DTF, INTERVAL_FULL_RANGE, ISOTIME, j2date(), MONTH, ParseFraction(), pg_tzset(), PM, RESERV, 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, type, TZ, UNITS, UNKNOWN_FIELD, USECS_PER_DAY, val, ValidateDate(), and value.

Referenced by check_recovery_target_time(), date_in(), 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 3353 of file datetime.c.

3355 {
3356  bool force_negative = false;
3357  bool is_before = false;
3358  bool parsing_unit_val = false;
3359  char *cp;
3360  int fmask = 0,
3361  tmask,
3362  type,
3363  uval;
3364  int i;
3365  int dterr;
3366  int64 val;
3367  double fval;
3368 
3369  *dtype = DTK_DELTA;
3370  type = IGNORE_DTF;
3371  ClearPgItmIn(itm_in);
3372 
3373  /*----------
3374  * The SQL standard defines the interval literal
3375  * '-1 1:00:00'
3376  * to mean "negative 1 days and negative 1 hours", while Postgres
3377  * traditionally treats this as meaning "negative 1 days and positive
3378  * 1 hours". In SQL_STANDARD intervalstyle, we apply the leading sign
3379  * to all fields if there are no other explicit signs.
3380  *
3381  * We leave the signs alone if there are additional explicit signs.
3382  * This protects us against misinterpreting postgres-style dump output,
3383  * since the postgres-style output code has always put an explicit sign on
3384  * all fields following a negative field. But note that SQL-spec output
3385  * is ambiguous and can be misinterpreted on load! (So it's best practice
3386  * to dump in postgres style, not SQL style.)
3387  *----------
3388  */
3389  if (IntervalStyle == INTSTYLE_SQL_STANDARD && nf > 0 && *field[0] == '-')
3390  {
3391  force_negative = true;
3392  /* Check for additional explicit signs */
3393  for (i = 1; i < nf; i++)
3394  {
3395  if (*field[i] == '-' || *field[i] == '+')
3396  {
3397  force_negative = false;
3398  break;
3399  }
3400  }
3401  }
3402 
3403  /* read through list backwards to pick up units before values */
3404  for (i = nf - 1; i >= 0; i--)
3405  {
3406  switch (ftype[i])
3407  {
3408  case DTK_TIME:
3409  dterr = DecodeTimeForInterval(field[i], fmask, range,
3410  &tmask, itm_in);
3411  if (dterr)
3412  return dterr;
3413  if (force_negative &&
3414  itm_in->tm_usec > 0)
3415  itm_in->tm_usec = -itm_in->tm_usec;
3416  type = DTK_DAY;
3417  parsing_unit_val = false;
3418  break;
3419 
3420  case DTK_TZ:
3421 
3422  /*
3423  * Timezone means a token with a leading sign character and at
3424  * least one digit; there could be ':', '.', '-' embedded in
3425  * it as well.
3426  */
3427  Assert(*field[i] == '-' || *field[i] == '+');
3428 
3429  /*
3430  * Check for signed hh:mm or hh:mm:ss. If so, process exactly
3431  * like DTK_TIME case above, plus handling the sign.
3432  */
3433  if (strchr(field[i] + 1, ':') != NULL &&
3434  DecodeTimeForInterval(field[i] + 1, fmask, range,
3435  &tmask, itm_in) == 0)
3436  {
3437  if (*field[i] == '-')
3438  {
3439  /* flip the sign on time field */
3440  if (itm_in->tm_usec == PG_INT64_MIN)
3441  return DTERR_FIELD_OVERFLOW;
3442  itm_in->tm_usec = -itm_in->tm_usec;
3443  }
3444 
3445  if (force_negative &&
3446  itm_in->tm_usec > 0)
3447  itm_in->tm_usec = -itm_in->tm_usec;
3448 
3449  /*
3450  * Set the next type to be a day, if units are not
3451  * specified. This handles the case of '1 +02:03' since we
3452  * are reading right to left.
3453  */
3454  type = DTK_DAY;
3455  parsing_unit_val = false;
3456  break;
3457  }
3458 
3459  /*
3460  * Otherwise, fall through to DTK_NUMBER case, which can
3461  * handle signed float numbers and signed year-month values.
3462  */
3463 
3464  /* FALLTHROUGH */
3465 
3466  case DTK_DATE:
3467  case DTK_NUMBER:
3468  if (type == IGNORE_DTF)
3469  {
3470  /* use typmod to decide what rightmost field is */
3471  switch (range)
3472  {
3473  case INTERVAL_MASK(YEAR):
3474  type = DTK_YEAR;
3475  break;
3476  case INTERVAL_MASK(MONTH):
3478  type = DTK_MONTH;
3479  break;
3480  case INTERVAL_MASK(DAY):
3481  type = DTK_DAY;
3482  break;
3483  case INTERVAL_MASK(HOUR):
3485  type = DTK_HOUR;
3486  break;
3487  case INTERVAL_MASK(MINUTE):
3490  type = DTK_MINUTE;
3491  break;
3492  case INTERVAL_MASK(SECOND):
3496  type = DTK_SECOND;
3497  break;
3498  default:
3499  type = DTK_SECOND;
3500  break;
3501  }
3502  }
3503 
3504  errno = 0;
3505  val = strtoi64(field[i], &cp, 10);
3506  if (errno == ERANGE)
3507  return DTERR_FIELD_OVERFLOW;
3508 
3509  if (*cp == '-')
3510  {
3511  /* SQL "years-months" syntax */
3512  int val2;
3513 
3514  val2 = strtoint(cp + 1, &cp, 10);
3515  if (errno == ERANGE || val2 < 0 || val2 >= MONTHS_PER_YEAR)
3516  return DTERR_FIELD_OVERFLOW;
3517  if (*cp != '\0')
3518  return DTERR_BAD_FORMAT;
3519  type = DTK_MONTH;
3520  if (*field[i] == '-')
3521  val2 = -val2;
3523  return DTERR_FIELD_OVERFLOW;
3524  if (pg_add_s64_overflow(val, val2, &val))
3525  return DTERR_FIELD_OVERFLOW;
3526  fval = 0;
3527  }
3528  else if (*cp == '.')
3529  {
3530  dterr = ParseFraction(cp, &fval);
3531  if (dterr)
3532  return dterr;
3533  if (*field[i] == '-')
3534  fval = -fval;
3535  }
3536  else if (*cp == '\0')
3537  fval = 0;
3538  else
3539  return DTERR_BAD_FORMAT;
3540 
3541  tmask = 0; /* DTK_M(type); */
3542 
3543  if (force_negative)
3544  {
3545  /* val and fval should be of same sign, but test anyway */
3546  if (val > 0)
3547  val = -val;
3548  if (fval > 0)
3549  fval = -fval;
3550  }
3551 
3552  switch (type)
3553  {
3554  case DTK_MICROSEC:
3555  if (!AdjustMicroseconds(val, fval, 1, itm_in))
3556  return DTERR_FIELD_OVERFLOW;
3557  tmask = DTK_M(MICROSECOND);
3558  break;
3559 
3560  case DTK_MILLISEC:
3561  if (!AdjustMicroseconds(val, fval, 1000, itm_in))
3562  return DTERR_FIELD_OVERFLOW;
3563  tmask = DTK_M(MILLISECOND);
3564  break;
3565 
3566  case DTK_SECOND:
3567  if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
3568  return DTERR_FIELD_OVERFLOW;
3569 
3570  /*
3571  * If any subseconds were specified, consider this
3572  * microsecond and millisecond input as well.
3573  */
3574  if (fval == 0)
3575  tmask = DTK_M(SECOND);
3576  else
3577  tmask = DTK_ALL_SECS_M;
3578  break;
3579 
3580  case DTK_MINUTE:
3581  if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3582  return DTERR_FIELD_OVERFLOW;
3583  tmask = DTK_M(MINUTE);
3584  break;
3585 
3586  case DTK_HOUR:
3587  if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3588  return DTERR_FIELD_OVERFLOW;
3589  tmask = DTK_M(HOUR);
3590  type = DTK_DAY; /* set for next field */
3591  break;
3592 
3593  case DTK_DAY:
3594  if (!AdjustDays(val, 1, itm_in) ||
3595  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3596  return DTERR_FIELD_OVERFLOW;
3597  tmask = DTK_M(DAY);
3598  break;
3599 
3600  case DTK_WEEK:
3601  if (!AdjustDays(val, 7, itm_in) ||
3602  !AdjustFractDays(fval, 7, itm_in))
3603  return DTERR_FIELD_OVERFLOW;
3604  tmask = DTK_M(WEEK);
3605  break;
3606 
3607  case DTK_MONTH:
3608  if (!AdjustMonths(val, itm_in) ||
3609  !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3610  return DTERR_FIELD_OVERFLOW;
3611  tmask = DTK_M(MONTH);
3612  break;
3613 
3614  case DTK_YEAR:
3615  if (!AdjustYears(val, 1, itm_in) ||
3616  !AdjustFractYears(fval, 1, itm_in))
3617  return DTERR_FIELD_OVERFLOW;
3618  tmask = DTK_M(YEAR);
3619  break;
3620 
3621  case DTK_DECADE:
3622  if (!AdjustYears(val, 10, itm_in) ||
3623  !AdjustFractYears(fval, 10, itm_in))
3624  return DTERR_FIELD_OVERFLOW;
3625  tmask = DTK_M(DECADE);
3626  break;
3627 
3628  case DTK_CENTURY:
3629  if (!AdjustYears(val, 100, itm_in) ||
3630  !AdjustFractYears(fval, 100, itm_in))
3631  return DTERR_FIELD_OVERFLOW;
3632  tmask = DTK_M(CENTURY);
3633  break;
3634 
3635  case DTK_MILLENNIUM:
3636  if (!AdjustYears(val, 1000, itm_in) ||
3637  !AdjustFractYears(fval, 1000, itm_in))
3638  return DTERR_FIELD_OVERFLOW;
3639  tmask = DTK_M(MILLENNIUM);
3640  break;
3641 
3642  default:
3643  return DTERR_BAD_FORMAT;
3644  }
3645  parsing_unit_val = false;
3646  break;
3647 
3648  case DTK_STRING:
3649  case DTK_SPECIAL:
3650  /* reject consecutive unhandled units */
3651  if (parsing_unit_val)
3652  return DTERR_BAD_FORMAT;
3653  type = DecodeUnits(i, field[i], &uval);
3654  if (type == UNKNOWN_FIELD)
3655  type = DecodeSpecial(i, field[i], &uval);
3656  if (type == IGNORE_DTF)
3657  continue;
3658 
3659  tmask = 0; /* DTK_M(type); */
3660  switch (type)
3661  {
3662  case UNITS:
3663  type = uval;
3664  parsing_unit_val = true;
3665  break;
3666 
3667  case AGO:
3668 
3669  /*
3670  * "ago" is only allowed to appear at the end of the
3671  * interval.
3672  */
3673  if (i != nf - 1)
3674  return DTERR_BAD_FORMAT;
3675  is_before = true;
3676  type = uval;
3677  break;
3678 
3679  case RESERV:
3680  tmask = (DTK_DATE_M | DTK_TIME_M);
3681 
3682  /*
3683  * Only reserved words corresponding to infinite
3684  * intervals are accepted.
3685  */
3686  if (uval != DTK_LATE && uval != DTK_EARLY)
3687  return DTERR_BAD_FORMAT;
3688 
3689  /*
3690  * Infinity cannot be followed by anything else. We
3691  * could allow "ago" to reverse the sign of infinity
3692  * but using signed infinity is more intuitive.
3693  */
3694  if (i != nf - 1)
3695  return DTERR_BAD_FORMAT;
3696 
3697  *dtype = uval;
3698  break;
3699 
3700  default:
3701  return DTERR_BAD_FORMAT;
3702  }
3703  break;
3704 
3705  default:
3706  return DTERR_BAD_FORMAT;
3707  }
3708 
3709  if (tmask & fmask)
3710  return DTERR_BAD_FORMAT;
3711  fmask |= tmask;
3712  }
3713 
3714  /* ensure that at least one time field has been found */
3715  if (fmask == 0)
3716  return DTERR_BAD_FORMAT;
3717 
3718  /* reject if unit appeared and was never handled */
3719  if (parsing_unit_val)
3720  return DTERR_BAD_FORMAT;
3721 
3722  /* finally, AGO negates everything */
3723  if (is_before)
3724  {
3725  if (itm_in->tm_usec == PG_INT64_MIN ||
3726  itm_in->tm_mday == INT_MIN ||
3727  itm_in->tm_mon == INT_MIN ||
3728  itm_in->tm_year == INT_MIN)
3729  return DTERR_FIELD_OVERFLOW;
3730 
3731  itm_in->tm_usec = -itm_in->tm_usec;
3732  itm_in->tm_mday = -itm_in->tm_mday;
3733  itm_in->tm_mon = -itm_in->tm_mon;
3734  itm_in->tm_year = -itm_in->tm_year;
3735  }
3736 
3737  return 0;
3738 }
int DecodeUnits(int field, const char *lowtoken, int *val)
Definition: datetime.c:4036
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:2690
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:3329
#define strtoi64(str, endptr, base)
Definition: c.h:1284
#define PG_INT64_MIN
Definition: c.h:578
#define USECS_PER_HOUR
Definition: timestamp.h:132
#define MONTHS_PER_YEAR
Definition: timestamp.h:108
#define USECS_PER_SEC
Definition: timestamp.h:134
#define USECS_PER_MINUTE
Definition: timestamp.h:133
#define DAYS_PER_MONTH
Definition: timestamp.h:116
int IntervalStyle
Definition: globals.c:124
#define MILLENNIUM
Definition: datetime.h:120
#define DTK_DECADE
Definition: datetime.h:168
#define DTK_SECOND
Definition: datetime.h:160
#define DTK_DELTA
Definition: datetime.h:159
#define MICROSECOND
Definition: datetime.h:104
#define HOUR
Definition: datetime.h:100
#define WEEK
Definition: datetime.h:117
#define DECADE
Definition: datetime.h:118
#define YEAR
Definition: datetime.h:92
#define DTK_CENTURY
Definition: datetime.h:169
#define MILLISECOND
Definition: datetime.h:103
#define DTK_DAY
Definition: datetime.h:163
#define CENTURY
Definition: datetime.h:119
#define DTK_MILLENNIUM
Definition: datetime.h:170
#define SECOND
Definition: datetime.h:102
#define DTK_ALL_SECS_M
Definition: datetime.h:190
#define DTK_HOUR
Definition: datetime.h:162
#define DTK_WEEK
Definition: datetime.h:164
#define MINUTE
Definition: datetime.h:101
#define DTK_MICROSEC
Definition: datetime.h:172
#define DTK_YEAR
Definition: datetime.h:167
#define AGO
Definition: datetime.h:110
#define DTK_MILLISEC
Definition: datetime.h:171
#define DTK_MONTH
Definition: datetime.h:165
#define DTK_MINUTE
Definition: datetime.h:161
static bool pg_mul_s64_overflow(int64 a, int64 b, int64 *result)
Definition: int.h:219
static bool pg_add_s64_overflow(int64 a, int64 b, int64 *result)
Definition: int.h:161
#define INTSTYLE_SQL_STANDARD
Definition: miscadmin.h:257
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, DecodeSpecial(), 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_EARLY, DTK_HOUR, DTK_LATE, 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, type, UNITS, UNKNOWN_FIELD, 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 3818 of file datetime.c.

3820 {
3821  bool datepart = true;
3822  bool havefield = false;
3823 
3824  *dtype = DTK_DELTA;
3825  ClearPgItmIn(itm_in);
3826 
3827  if (strlen(str) < 2 || str[0] != 'P')
3828  return DTERR_BAD_FORMAT;
3829 
3830  str++;
3831  while (*str)
3832  {
3833  char *fieldstart;
3834  int64 val;
3835  double fval;
3836  char unit;
3837  int dterr;
3838 
3839  if (*str == 'T') /* T indicates the beginning of the time part */
3840  {
3841  datepart = false;
3842  havefield = false;
3843  str++;
3844  continue;
3845  }
3846 
3847  fieldstart = str;
3848  dterr = ParseISO8601Number(str, &str, &val, &fval);
3849  if (dterr)
3850  return dterr;
3851 
3852  /*
3853  * Note: we could step off the end of the string here. Code below
3854  * *must* exit the loop if unit == '\0'.
3855  */
3856  unit = *str++;
3857 
3858  if (datepart)
3859  {
3860  switch (unit) /* before T: Y M W D */
3861  {
3862  case 'Y':
3863  if (!AdjustYears(val, 1, itm_in) ||
3864  !AdjustFractYears(fval, 1, itm_in))
3865  return DTERR_FIELD_OVERFLOW;
3866  break;
3867  case 'M':
3868  if (!AdjustMonths(val, itm_in) ||
3869  !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3870  return DTERR_FIELD_OVERFLOW;
3871  break;
3872  case 'W':
3873  if (!AdjustDays(val, 7, itm_in) ||
3874  !AdjustFractDays(fval, 7, itm_in))
3875  return DTERR_FIELD_OVERFLOW;
3876  break;
3877  case 'D':
3878  if (!AdjustDays(val, 1, itm_in) ||
3879  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3880  return DTERR_FIELD_OVERFLOW;
3881  break;
3882  case 'T': /* ISO 8601 4.4.3.3 Alternative Format / Basic */
3883  case '\0':
3884  if (ISO8601IntegerWidth(fieldstart) == 8 && !havefield)
3885  {
3886  if (!AdjustYears(val / 10000, 1, itm_in) ||
3887  !AdjustMonths((val / 100) % 100, itm_in) ||
3888  !AdjustDays(val % 100, 1, itm_in) ||
3889  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3890  return DTERR_FIELD_OVERFLOW;
3891  if (unit == '\0')
3892  return 0;
3893  datepart = false;
3894  havefield = false;
3895  continue;
3896  }
3897  /* Else fall through to extended alternative format */
3898  /* FALLTHROUGH */
3899  case '-': /* ISO 8601 4.4.3.3 Alternative Format,
3900  * Extended */
3901  if (havefield)
3902  return DTERR_BAD_FORMAT;
3903 
3904  if (!AdjustYears(val, 1, itm_in) ||
3905  !AdjustFractYears(fval, 1, itm_in))
3906  return DTERR_FIELD_OVERFLOW;
3907  if (unit == '\0')
3908  return 0;
3909  if (unit == 'T')
3910  {
3911  datepart = false;
3912  havefield = false;
3913  continue;
3914  }
3915 
3916  dterr = ParseISO8601Number(str, &str, &val, &fval);
3917  if (dterr)
3918  return dterr;
3919  if (!AdjustMonths(val, itm_in) ||
3920  !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3921  return DTERR_FIELD_OVERFLOW;
3922  if (*str == '\0')
3923  return 0;
3924  if (*str == 'T')
3925  {
3926  datepart = false;
3927  havefield = false;
3928  continue;
3929  }
3930  if (*str != '-')
3931  return DTERR_BAD_FORMAT;
3932  str++;
3933 
3934  dterr = ParseISO8601Number(str, &str, &val, &fval);
3935  if (dterr)
3936  return dterr;
3937  if (!AdjustDays(val, 1, itm_in) ||
3938  !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3939  return DTERR_FIELD_OVERFLOW;
3940  if (*str == '\0')
3941  return 0;
3942  if (*str == 'T')
3943  {
3944  datepart = false;
3945  havefield = false;
3946  continue;
3947  }
3948  return DTERR_BAD_FORMAT;
3949  default:
3950  /* not a valid date unit suffix */
3951  return DTERR_BAD_FORMAT;
3952  }
3953  }
3954  else
3955  {
3956  switch (unit) /* after T: H M S */
3957  {
3958  case 'H':
3959  if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3960  return DTERR_FIELD_OVERFLOW;
3961  break;
3962  case 'M':
3963  if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3964  return DTERR_FIELD_OVERFLOW;
3965  break;
3966  case 'S':
3967  if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
3968  return DTERR_FIELD_OVERFLOW;
3969  break;
3970  case '\0': /* ISO 8601 4.4.3.3 Alternative Format */
3971  if (ISO8601IntegerWidth(fieldstart) == 6 && !havefield)
3972  {
3973  if (!AdjustMicroseconds(val / 10000, 0, USECS_PER_HOUR, itm_in) ||
3974  !AdjustMicroseconds((val / 100) % 100, 0, USECS_PER_MINUTE, itm_in) ||
3975  !AdjustMicroseconds(val % 100, 0, USECS_PER_SEC, itm_in) ||
3976  !AdjustFractMicroseconds(fval, 1, itm_in))
3977  return DTERR_FIELD_OVERFLOW;
3978  return 0;
3979  }
3980  /* Else fall through to extended alternative format */
3981  /* FALLTHROUGH */
3982  case ':': /* ISO 8601 4.4.3.3 Alternative Format,
3983  * Extended */
3984  if (havefield)
3985  return DTERR_BAD_FORMAT;
3986 
3987  if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3988  return DTERR_FIELD_OVERFLOW;
3989  if (unit == '\0')
3990  return 0;
3991 
3992  dterr = ParseISO8601Number(str, &str, &val, &fval);
3993  if (dterr)
3994  return dterr;
3995  if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3996  return DTERR_FIELD_OVERFLOW;
3997  if (*str == '\0')
3998  return 0;
3999  if (*str != ':')
4000  return DTERR_BAD_FORMAT;
4001  str++;
4002 
4003  dterr = ParseISO8601Number(str, &str, &val, &fval);
4004  if (dterr)
4005  return dterr;
4006  if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
4007  return DTERR_FIELD_OVERFLOW;
4008  if (*str == '\0')
4009  return 0;
4010  return DTERR_BAD_FORMAT;
4011 
4012  default:
4013  /* not a valid time unit suffix */
4014  return DTERR_BAD_FORMAT;
4015  }
4016  }
4017 
4018  havefield = true;
4019  }
4020 
4021  return 0;
4022 }
static int ISO8601IntegerWidth(char *fieldstart)
Definition: datetime.c:3791
static int ParseISO8601Number(char *str, char **endptr, int64 *ipart, double *fpart)
Definition: datetime.c:3749

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 3137 of file datetime.c.

3138 {
3139  int type;
3140  const datetkn *tp;
3141 
3142  tp = datecache[field];
3143  /* use strncmp so that we match truncated tokens */
3144  if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
3145  {
3146  tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
3147  }
3148  if (tp == NULL)
3149  {
3150  type = UNKNOWN_FIELD;
3151  *val = 0;
3152  }
3153  else
3154  {
3155  datecache[field] = tp;
3156  type = tp->type;
3157  *val = tp->value;
3158  }
3159 
3160  return type;
3161 }
static const datetkn * datecache[MAXDATEFIELDS]
Definition: datetime.c:258
static const datetkn * datebsearch(const char *key, const datetkn *base, int nel)
Definition: datetime.c:4142

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

Referenced by DecodeDate(), DecodeDateTime(), DecodeInterval(), 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 1864 of file datetime.c.

1867 {
1868  int fmask = 0,
1869  tmask,
1870  type;
1871  int ptype = 0; /* "prefix type" for ISO and Julian formats */
1872  int i;
1873  int val;
1874  int dterr;
1875  bool isjulian = false;
1876  bool is2digits = false;
1877  bool bc = false;
1878  int mer = HR24;
1879  pg_tz *namedTz = NULL;
1880  pg_tz *abbrevTz = NULL;
1881  char *abbrev = NULL;
1882  pg_tz *valtz;
1883 
1884  *dtype = DTK_TIME;
1885  tm->tm_hour = 0;
1886  tm->tm_min = 0;
1887  tm->tm_sec = 0;
1888  *fsec = 0;
1889  /* don't know daylight savings time status apriori */
1890  tm->tm_isdst = -1;
1891 
1892  if (tzp != NULL)
1893  *tzp = 0;
1894 
1895  for (i = 0; i < nf; i++)
1896  {
1897  switch (ftype[i])
1898  {
1899  case DTK_DATE:
1900 
1901  /*
1902  * Time zone not allowed? Then should not accept dates or time
1903  * zones no matter what else!
1904  */
1905  if (tzp == NULL)
1906  return DTERR_BAD_FORMAT;
1907 
1908  /* Under limited circumstances, we will accept a date... */
1909  if (i == 0 && nf >= 2 &&
1910  (ftype[nf - 1] == DTK_DATE || ftype[1] == DTK_TIME))
1911  {
1912  dterr = DecodeDate(field[i], fmask,
1913  &tmask, &is2digits, tm);
1914  if (dterr)
1915  return dterr;
1916  }
1917  /* otherwise, this is a time and/or time zone */
1918  else
1919  {
1920  if (isdigit((unsigned char) *field[i]))
1921  {
1922  char *cp;
1923 
1924  /*
1925  * Starts with a digit but we already have a time
1926  * field? Then we are in trouble with time already...
1927  */
1928  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1929  return DTERR_BAD_FORMAT;
1930 
1931  /*
1932  * Should not get here and fail. Sanity check only...
1933  */
1934  if ((cp = strchr(field[i], '-')) == NULL)
1935  return DTERR_BAD_FORMAT;
1936 
1937  /* Get the time zone from the end of the string */
1938  dterr = DecodeTimezone(cp, tzp);
1939  if (dterr)
1940  return dterr;
1941  *cp = '\0';
1942 
1943  /*
1944  * Then read the rest of the field as a concatenated
1945  * time
1946  */
1947  dterr = DecodeNumberField(strlen(field[i]), field[i],
1948  (fmask | DTK_DATE_M),
1949  &tmask, tm,
1950  fsec, &is2digits);
1951  if (dterr < 0)
1952  return dterr;
1953  ftype[i] = dterr;
1954 
1955  tmask |= DTK_M(TZ);
1956  }
1957  else
1958  {
1959  namedTz = pg_tzset(field[i]);
1960  if (!namedTz)
1961  {
1962  extra->dtee_timezone = field[i];
1963  return DTERR_BAD_TIMEZONE;
1964  }
1965  /* we'll apply the zone setting below */
1966  ftype[i] = DTK_TZ;
1967  tmask = DTK_M(TZ);
1968  }
1969  }
1970  break;
1971 
1972  case DTK_TIME:
1973  dterr = DecodeTime(field[i], (fmask | DTK_DATE_M),
1975  &tmask, tm, fsec);
1976  if (dterr)
1977  return dterr;
1978  break;
1979 
1980  case DTK_TZ:
1981  {
1982  int tz;
1983 
1984  if (tzp == NULL)
1985  return DTERR_BAD_FORMAT;
1986 
1987  dterr = DecodeTimezone(field[i], &tz);
1988  if (dterr)
1989  return dterr;
1990  *tzp = tz;
1991  tmask = DTK_M(TZ);
1992  }
1993  break;
1994 
1995  case DTK_NUMBER:
1996 
1997  /*
1998  * Deal with cases where previous field labeled this one
1999  */
2000  if (ptype != 0)
2001  {
2002  char *cp;
2003  int value;
2004 
2005  errno = 0;
2006  value = strtoint(field[i], &cp, 10);
2007  if (errno == ERANGE)
2008  return DTERR_FIELD_OVERFLOW;
2009  if (*cp != '.' && *cp != '\0')
2010  return DTERR_BAD_FORMAT;
2011 
2012  switch (ptype)
2013  {
2014  case DTK_JULIAN:
2015  /* previous field was a label for "julian date" */
2016  if (tzp == NULL)
2017  return DTERR_BAD_FORMAT;
2018  if (value < 0)
2019  return DTERR_FIELD_OVERFLOW;
2020  tmask = DTK_DATE_M;
2021  j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2022  isjulian = true;
2023 
2024  if (*cp == '.')
2025  {
2026  double time;
2027 
2028  dterr = ParseFraction(cp, &time);
2029  if (dterr)
2030  return dterr;
2031  time *= USECS_PER_DAY;
2032  dt2time(time,
2033  &tm->tm_hour, &tm->tm_min,
2034  &tm->tm_sec, fsec);
2035  tmask |= DTK_TIME_M;
2036  }
2037  break;
2038 
2039  case DTK_TIME:
2040  /* previous field was "t" for ISO time */
2041  dterr = DecodeNumberField(strlen(field[i]), field[i],
2042  (fmask | DTK_DATE_M),
2043  &tmask, tm,
2044  fsec, &is2digits);
2045  if (dterr < 0)
2046  return dterr;
2047  ftype[i] = dterr;
2048 
2049  if (tmask != DTK_TIME_M)
2050  return DTERR_BAD_FORMAT;
2051  break;
2052 
2053  default:
2054  return DTERR_BAD_FORMAT;
2055  break;
2056  }
2057 
2058  ptype = 0;
2059  *dtype = DTK_DATE;
2060  }
2061  else
2062  {
2063  char *cp;
2064  int flen;
2065 
2066  flen = strlen(field[i]);
2067  cp = strchr(field[i], '.');
2068 
2069  /* Embedded decimal? */
2070  if (cp != NULL)
2071  {
2072  /*
2073  * Under limited circumstances, we will accept a
2074  * date...
2075  */
2076  if (i == 0 && nf >= 2 && ftype[nf - 1] == DTK_DATE)
2077  {
2078  dterr = DecodeDate(field[i], fmask,
2079  &tmask, &is2digits, tm);
2080  if (dterr)
2081  return dterr;
2082  }
2083  /* embedded decimal and several digits before? */
2084  else if (flen - strlen(cp) > 2)
2085  {
2086  /*
2087  * Interpret as a concatenated date or time Set
2088  * the type field to allow decoding other fields
2089  * later. Example: 20011223 or 040506
2090  */
2091  dterr = DecodeNumberField(flen, field[i],
2092  (fmask | DTK_DATE_M),
2093  &tmask, tm,
2094  fsec, &is2digits);
2095  if (dterr < 0)
2096  return dterr;
2097  ftype[i] = dterr;
2098  }
2099  else
2100  return DTERR_BAD_FORMAT;
2101  }
2102  else if (flen > 4)
2103  {
2104  dterr = DecodeNumberField(flen, field[i],
2105  (fmask | DTK_DATE_M),
2106  &tmask, tm,
2107  fsec, &is2digits);
2108  if (dterr < 0)
2109  return dterr;
2110  ftype[i] = dterr;
2111  }
2112  /* otherwise it is a single date/time field... */
2113  else
2114  {
2115  dterr = DecodeNumber(flen, field[i],
2116  false,
2117  (fmask | DTK_DATE_M),
2118  &tmask, tm,
2119  fsec, &is2digits);
2120  if (dterr)
2121  return dterr;
2122  }
2123  }
2124  break;
2125 
2126  case DTK_STRING:
2127  case DTK_SPECIAL:
2128  /* timezone abbrevs take precedence over built-in tokens */
2129  dterr = DecodeTimezoneAbbrev(i, field[i],
2130  &type, &val, &valtz, extra);
2131  if (dterr)
2132  return dterr;
2133  if (type == UNKNOWN_FIELD)
2134  type = DecodeSpecial(i, field[i], &val);
2135  if (type == IGNORE_DTF)
2136  continue;
2137 
2138  tmask = DTK_M(type);
2139  switch (type)
2140  {
2141  case RESERV:
2142  switch (val)
2143  {
2144  case DTK_NOW:
2145  tmask = DTK_TIME_M;
2146  *dtype = DTK_TIME;
2147  GetCurrentTimeUsec(tm, fsec, NULL);
2148  break;
2149 
2150  case DTK_ZULU:
2151  tmask = (DTK_TIME_M | DTK_M(TZ));
2152  *dtype = DTK_TIME;
2153  tm->tm_hour = 0;
2154  tm->tm_min = 0;
2155  tm->tm_sec = 0;
2156  tm->tm_isdst = 0;
2157  break;
2158 
2159  default:
2160  return DTERR_BAD_FORMAT;
2161  }
2162 
2163  break;
2164 
2165  case DTZMOD:
2166 
2167  /*
2168  * daylight savings time modifier (solves "MET DST"
2169  * syntax)
2170  */
2171  tmask |= DTK_M(DTZ);
2172  tm->tm_isdst = 1;
2173  if (tzp == NULL)
2174  return DTERR_BAD_FORMAT;
2175  *tzp -= val;
2176  break;
2177 
2178  case DTZ:
2179 
2180  /*
2181  * set mask for TZ here _or_ check for DTZ later when
2182  * getting default timezone
2183  */
2184  tmask |= DTK_M(TZ);
2185  tm->tm_isdst = 1;
2186  if (tzp == NULL)
2187  return DTERR_BAD_FORMAT;
2188  *tzp = -val;
2189  ftype[i] = DTK_TZ;
2190  break;
2191 
2192  case TZ:
2193  tm->tm_isdst = 0;
2194  if (tzp == NULL)
2195  return DTERR_BAD_FORMAT;
2196  *tzp = -val;
2197  ftype[i] = DTK_TZ;
2198  break;
2199 
2200  case DYNTZ:
2201  tmask |= DTK_M(TZ);
2202  if (tzp == NULL)
2203  return DTERR_BAD_FORMAT;
2204  /* we'll determine the actual offset later */
2205  abbrevTz = valtz;
2206  abbrev = field[i];
2207  ftype[i] = DTK_TZ;
2208  break;
2209 
2210  case AMPM:
2211  mer = val;
2212  break;
2213 
2214  case ADBC:
2215  bc = (val == BC);
2216  break;
2217 
2218  case UNITS:
2219  tmask = 0;
2220  /* reject consecutive unhandled units */
2221  if (ptype != 0)
2222  return DTERR_BAD_FORMAT;
2223  ptype = val;
2224  break;
2225 
2226  case ISOTIME:
2227  tmask = 0;
2228  /* reject consecutive unhandled units */
2229  if (ptype != 0)
2230  return DTERR_BAD_FORMAT;
2231  ptype = val;
2232  break;
2233 
2234  case UNKNOWN_FIELD:
2235 
2236  /*
2237  * Before giving up and declaring error, check to see
2238  * if it is an all-alpha timezone name.
2239  */
2240  namedTz = pg_tzset(field[i]);
2241  if (!namedTz)
2242  return DTERR_BAD_FORMAT;
2243  /* we'll apply the zone setting below */
2244  tmask = DTK_M(TZ);
2245  break;
2246 
2247  default:
2248  return DTERR_BAD_FORMAT;
2249  }
2250  break;
2251 
2252  default:
2253  return DTERR_BAD_FORMAT;
2254  }
2255 
2256  if (tmask & fmask)
2257  return DTERR_BAD_FORMAT;
2258  fmask |= tmask;
2259  } /* end loop over fields */
2260 
2261  /* reject if prefix type appeared and was never handled */
2262  if (ptype != 0)
2263  return DTERR_BAD_FORMAT;
2264 
2265  /* do final checking/adjustment of Y/M/D fields */
2266  dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
2267  if (dterr)
2268  return dterr;
2269 
2270  /* handle AM/PM */
2271  if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
2272  return DTERR_FIELD_OVERFLOW;
2273  if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
2274  tm->tm_hour = 0;
2275  else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
2276  tm->tm_hour += HOURS_PER_DAY / 2;
2277 
2278  /* check for time overflow */
2279  if (time_overflows(tm->tm_hour, tm->tm_min, tm->tm_sec, *fsec))
2280  return DTERR_FIELD_OVERFLOW;
2281 
2282  if ((fmask & DTK_TIME_M) != DTK_TIME_M)
2283  return DTERR_BAD_FORMAT;
2284 
2285  /*
2286  * If we had a full timezone spec, compute the offset (we could not do it
2287  * before, because we may need the date to resolve DST status).
2288  */
2289  if (namedTz != NULL)
2290  {
2291  long int gmtoff;
2292 
2293  /* daylight savings time modifier disallowed with full TZ */
2294  if (fmask & DTK_M(DTZMOD))
2295  return DTERR_BAD_FORMAT;
2296 
2297  /* if non-DST zone, we do not need to know the date */
2298  if (pg_get_timezone_offset(namedTz, &gmtoff))
2299  {
2300  *tzp = -(int) gmtoff;
2301  }
2302  else
2303  {
2304  /* a date has to be specified */
2305  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2306  return DTERR_BAD_FORMAT;
2307  *tzp = DetermineTimeZoneOffset(tm, namedTz);
2308  }
2309  }
2310 
2311  /*
2312  * Likewise, if we had a dynamic timezone abbreviation, resolve it now.
2313  */
2314  if (abbrevTz != NULL)
2315  {
2316  struct pg_tm tt,
2317  *tmp = &tt;
2318 
2319  /*
2320  * daylight savings time modifier but no standard timezone? then error
2321  */
2322  if (fmask & DTK_M(DTZMOD))
2323  return DTERR_BAD_FORMAT;
2324 
2325  if ((fmask & DTK_DATE_M) == 0)
2326  GetCurrentDateTime(tmp);
2327  else
2328  {
2329  /* a date has to be specified */
2330  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2331  return DTERR_BAD_FORMAT;
2332  tmp->tm_year = tm->tm_year;
2333  tmp->tm_mon = tm->tm_mon;
2334  tmp->tm_mday = tm->tm_mday;
2335  }
2336  tmp->tm_hour = tm->tm_hour;
2337  tmp->tm_min = tm->tm_min;
2338  tmp->tm_sec = tm->tm_sec;
2339  *tzp = DetermineTimeZoneAbbrevOffset(tmp, abbrev, abbrevTz);
2340  tm->tm_isdst = tmp->tm_isdst;
2341  }
2342 
2343  /* timezone not specified? then use session timezone */
2344  if (tzp != NULL && !(fmask & DTK_M(TZ)))
2345  {
2346  struct pg_tm tt,
2347  *tmp = &tt;
2348 
2349  /*
2350  * daylight savings time modifier but no standard timezone? then error
2351  */
2352  if (fmask & DTK_M(DTZMOD))
2353  return DTERR_BAD_FORMAT;
2354 
2355  if ((fmask & DTK_DATE_M) == 0)
2356  GetCurrentDateTime(tmp);
2357  else
2358  {
2359  /* a date has to be specified */
2360  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2361  return DTERR_BAD_FORMAT;
2362  tmp->tm_year = tm->tm_year;
2363  tmp->tm_mon = tm->tm_mon;
2364  tmp->tm_mday = tm->tm_mday;
2365  }
2366  tmp->tm_hour = tm->tm_hour;
2367  tmp->tm_min = tm->tm_min;
2368  tmp->tm_sec = tm->tm_sec;
2370  tm->tm_isdst = tmp->tm_isdst;
2371  }
2372 
2373  return 0;
2374 }
bool pg_get_timezone_offset(const pg_tz *tz, long int *gmtoff)
Definition: localtime.c:1851

References ADBC, AM, AMPM, BC, DecodeDate(), DecodeNumber(), DecodeNumberField(), DecodeSpecial(), DecodeTime(), DecodeTimezone(), DecodeTimezoneAbbrev(), DetermineTimeZoneAbbrevOffset(), DetermineTimeZoneOffset(), dt2time(), DateTimeErrorExtra::dtee_timezone, DTERR_BAD_FORMAT, DTERR_BAD_TIMEZONE, DTERR_FIELD_OVERFLOW, DTK_DATE, DTK_DATE_M, DTK_JULIAN, DTK_M, DTK_NOW, DTK_NUMBER, DTK_SPECIAL, DTK_STRING, DTK_TIME, DTK_TIME_M, DTK_TZ, DTK_ZULU, DTZ, DTZMOD, DYNTZ, GetCurrentDateTime(), GetCurrentTimeUsec(), HOURS_PER_DAY, HR24, i, IGNORE_DTF, INTERVAL_FULL_RANGE, ISOTIME, j2date(), ParseFraction(), pg_get_timezone_offset(), pg_tzset(), PM, RESERV, 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, type, TZ, UNITS, UNKNOWN_FIELD, USECS_PER_DAY, val, ValidateDate(), and value.

Referenced by time_in(), and timetz_in().

◆ DecodeTimezone()

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

Definition at line 2996 of file datetime.c.

2997 {
2998  int tz;
2999  int hr,
3000  min,
3001  sec = 0;
3002  char *cp;
3003 
3004  /* leading character must be "+" or "-" */
3005  if (*str != '+' && *str != '-')
3006  return DTERR_BAD_FORMAT;
3007 
3008  errno = 0;
3009  hr = strtoint(str + 1, &cp, 10);
3010  if (errno == ERANGE)
3011  return DTERR_TZDISP_OVERFLOW;
3012 
3013  /* explicit delimiter? */
3014  if (*cp == ':')
3015  {
3016  errno = 0;
3017  min = strtoint(cp + 1, &cp, 10);
3018  if (errno == ERANGE)
3019  return DTERR_TZDISP_OVERFLOW;
3020  if (*cp == ':')
3021  {
3022  errno = 0;
3023  sec = strtoint(cp + 1, &cp, 10);
3024  if (errno == ERANGE)
3025  return DTERR_TZDISP_OVERFLOW;
3026  }
3027  }
3028  /* otherwise, might have run things together... */
3029  else if (*cp == '\0' && strlen(str) > 3)
3030  {
3031  min = hr % 100;
3032  hr = hr / 100;
3033  /* we could, but don't, support a run-together hhmmss format */
3034  }
3035  else
3036  min = 0;
3037 
3038  /* Range-check the values; see notes in datatype/timestamp.h */
3039  if (hr < 0 || hr > MAX_TZDISP_HOUR)
3040  return DTERR_TZDISP_OVERFLOW;
3041  if (min < 0 || min >= MINS_PER_HOUR)
3042  return DTERR_TZDISP_OVERFLOW;
3043  if (sec < 0 || sec >= SECS_PER_MINUTE)
3044  return DTERR_TZDISP_OVERFLOW;
3045 
3046  tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE + sec;
3047  if (*str == '-')
3048  tz = -tz;
3049 
3050  *tzp = -tz;
3051 
3052  if (*cp != '\0')
3053  return DTERR_BAD_FORMAT;
3054 
3055  return 0;
3056 }
#define MAX_TZDISP_HOUR
Definition: timestamp.h:143
#define MINS_PER_HOUR
Definition: timestamp.h:129
#define SECS_PER_MINUTE
Definition: timestamp.h:128

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(), and parse_sane_timezone().

◆ DecodeTimezoneAbbrev()

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

Definition at line 3080 of file datetime.c.

3083 {
3084  const datetkn *tp;
3085 
3086  tp = abbrevcache[field];
3087  /* use strncmp so that we match truncated tokens */
3088  if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
3089  {
3090  if (zoneabbrevtbl)
3091  tp = datebsearch(lowtoken, zoneabbrevtbl->abbrevs,
3093  else
3094  tp = NULL;
3095  }
3096  if (tp == NULL)
3097  {
3098  *ftype = UNKNOWN_FIELD;
3099  *offset = 0;
3100  *tz = NULL;
3101  }
3102  else
3103  {
3104  abbrevcache[field] = tp;
3105  *ftype = tp->type;
3106  if (tp->type == DYNTZ)
3107  {
3108  *offset = 0;
3109  *tz = FetchDynamicTimeZone(zoneabbrevtbl, tp, extra);
3110  if (*tz == NULL)
3111  return DTERR_BAD_ZONE_ABBREV;
3112  }
3113  else
3114  {
3115  *offset = tp->value;
3116  *tz = NULL;
3117  }
3118  }
3119 
3120  return 0;
3121 }
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:4959

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(), and DecodeTimezoneName().

◆ DecodeTimezoneAbbrevPrefix()

int DecodeTimezoneAbbrevPrefix ( const char *  str,
int *  offset,
pg_tz **  tz 
)

Definition at line 3262 of file datetime.c.

3263 {
3264  char lowtoken[TOKMAXLEN + 1];
3265  int len;
3266 
3267  *offset = 0; /* avoid uninitialized vars on failure */
3268  *tz = NULL;
3269 
3270  if (!zoneabbrevtbl)
3271  return -1; /* no abbrevs known, so fail immediately */
3272 
3273  /* Downcase as much of the string as we could need */
3274  for (len = 0; len < TOKMAXLEN; len++)
3275  {
3276  if (*str == '\0' || !isalpha((unsigned char) *str))
3277  break;
3278  lowtoken[len] = pg_tolower((unsigned char) *str++);
3279  }
3280  lowtoken[len] = '\0';
3281 
3282  /*
3283  * We could avoid doing repeated binary searches if we cared to duplicate
3284  * datebsearch here, but it's not clear that such an optimization would be
3285  * worth the trouble. In common cases there's probably not anything after
3286  * the zone abbrev anyway. So just search with successively truncated
3287  * strings.
3288  */
3289  while (len > 0)
3290  {
3291  const datetkn *tp = datebsearch(lowtoken, zoneabbrevtbl->abbrevs,
3293 
3294  if (tp != NULL)
3295  {
3296  if (tp->type == DYNTZ)
3297  {
3298  DateTimeErrorExtra extra;
3300  &extra);
3301 
3302  if (tzp != NULL)
3303  {
3304  /* Caller must resolve the abbrev's current meaning */
3305  *tz = tzp;
3306  return len;
3307  }
3308  }
3309  else
3310  {
3311  /* Fixed-offset zone abbrev, so it's easy */
3312  *offset = tp->value;
3313  return len;
3314  }
3315  }
3316  lowtoken[--len] = '\0';
3317  }
3318 
3319  /* Did not find a match */
3320  return -1;
3321 }
const void size_t len
unsigned char pg_tolower(unsigned char ch)
Definition: pgstrcasecmp.c:122

References TimeZoneAbbrevTable::abbrevs, datebsearch(), DYNTZ, FetchDynamicTimeZone(), len, TimeZoneAbbrevTable::numabbrevs, pg_tolower(), generate_unaccent_rules::str, TOKMAXLEN, datetkn::type, datetkn::value, and zoneabbrevtbl.

Referenced by DCH_from_char().

◆ DecodeTimezoneName()

int DecodeTimezoneName ( const char *  tzname,
int *  offset,
pg_tz **  tz 
)

Definition at line 3179 of file datetime.c.

3180 {
3181  char *lowzone;
3182  int dterr,
3183  type;
3184  DateTimeErrorExtra extra;
3185 
3186  /*
3187  * First we look in the timezone abbreviation table (to handle cases like
3188  * "EST"), and if that fails, we look in the timezone database (to handle
3189  * cases like "America/New_York"). This matches the order in which
3190  * timestamp input checks the cases; it's important because the timezone
3191  * database unwisely uses a few zone names that are identical to offset
3192  * abbreviations.
3193  */
3194 
3195  /* DecodeTimezoneAbbrev requires lowercase input */
3196  lowzone = downcase_truncate_identifier(tzname,
3197  strlen(tzname),
3198  false);
3199 
3200  dterr = DecodeTimezoneAbbrev(0, lowzone, &type, offset, tz, &extra);
3201  if (dterr)
3202  DateTimeParseError(dterr, &extra, NULL, NULL, NULL);
3203 
3204  if (type == TZ || type == DTZ)
3205  {
3206  /* fixed-offset abbreviation, return the offset */
3207  return TZNAME_FIXED_OFFSET;
3208  }
3209  else if (type == DYNTZ)
3210  {
3211  /* dynamic-offset abbreviation, return its referenced timezone */
3212  return TZNAME_DYNTZ;
3213  }
3214  else
3215  {
3216  /* try it as a full zone name */
3217  *tz = pg_tzset(tzname);
3218  if (*tz == NULL)
3219  ereport(ERROR,
3220  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3221  errmsg("time zone \"%s\" not recognized", tzname)));
3222  return TZNAME_ZONE;
3223  }
3224 }
void DateTimeParseError(int dterr, DateTimeErrorExtra *extra, const char *str, const char *datatype, Node *escontext)
Definition: datetime.c:4081
#define ereport(elevel,...)
Definition: elog.h:149
#define TZNAME_ZONE
Definition: datetime.h:301
#define TZNAME_FIXED_OFFSET
Definition: datetime.h:299
#define TZNAME_DYNTZ
Definition: datetime.h:300
char * downcase_truncate_identifier(const char *ident, int len, bool warn)
Definition: scansup.c:37

References DateTimeParseError(), DecodeTimezoneAbbrev(), downcase_truncate_identifier(), DTZ, DYNTZ, ereport, errcode(), errmsg(), ERROR, pg_tzset(), type, TZ, TZNAME_DYNTZ, TZNAME_FIXED_OFFSET, and TZNAME_ZONE.

Referenced by DecodeTimezoneNameToTz(), parse_sane_timezone(), timestamp_zone(), timestamptz_zone(), and timetz_zone().

◆ DecodeTimezoneNameToTz()

pg_tz* DecodeTimezoneNameToTz ( const char *  tzname)

Definition at line 3234 of file datetime.c.

3235 {
3236  pg_tz *result;
3237  int offset;
3238 
3239  if (DecodeTimezoneName(tzname, &offset, &result) == TZNAME_FIXED_OFFSET)
3240  {
3241  /* fixed-offset abbreviation, get a pg_tz descriptor for that */
3242  result = pg_tzset_offset(-offset); /* flip to POSIX sign convention */
3243  }
3244  return result;
3245 }
int DecodeTimezoneName(const char *tzname, int *offset, pg_tz **tz)
Definition: datetime.c:3179
pg_tz * pg_tzset_offset(long gmtoffset)
Definition: pgtz.c:320

References DecodeTimezoneName(), pg_tzset_offset(), and TZNAME_FIXED_OFFSET.

Referenced by lookup_timezone().

◆ DecodeUnits()

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

Definition at line 4036 of file datetime.c.

4037 {
4038  int type;
4039  const datetkn *tp;
4040 
4041  tp = deltacache[field];
4042  /* use strncmp so that we match truncated tokens */
4043  if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
4044  {
4045  tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
4046  }
4047  if (tp == NULL)
4048  {
4049  type = UNKNOWN_FIELD;
4050  *val = 0;
4051  }
4052  else
4053  {
4054  deltacache[field] = tp;
4055  type = tp->type;
4056  *val = tp->value;
4057  }
4058 
4059  return type;
4060 } /* DecodeUnits() */
static const datetkn * deltacache[MAXDATEFIELDS]
Definition: datetime.c:260

References datebsearch(), deltacache, deltatktbl, szdeltatktbl, datetkn::token, TOKMAXLEN, 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 1746 of file datetime.c.

1747 {
1748  pg_time_t t;
1749  int zone_offset;
1750  int abbr_offset;
1751  int abbr_isdst;
1752 
1753  /*
1754  * Compute the UTC time we want to probe at. (In event of overflow, we'll
1755  * probe at the epoch, which is a bit random but probably doesn't matter.)
1756  */
1757  zone_offset = DetermineTimeZoneOffsetInternal(tm, tzp, &t);
1758 
1759  /*
1760  * Try to match the abbreviation to something in the zone definition.
1761  */
1762  if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1763  &abbr_offset, &abbr_isdst))
1764  {
1765  /* Success, so use the abbrev-specific answers. */
1766  tm->tm_isdst = abbr_isdst;
1767  return abbr_offset;
1768  }
1769 
1770  /*
1771  * No match, so use the answers we already got from
1772  * DetermineTimeZoneOffsetInternal.
1773  */
1774  return zone_offset;
1775 }
static int DetermineTimeZoneOffsetInternal(struct pg_tm *tm, pg_tz *tzp, pg_time_t *tp)
Definition: datetime.c:1607
static bool DetermineTimeZoneAbbrevOffsetInternal(pg_time_t t, const char *abbr, pg_tz *tzp, int *offset, int *isdst)
Definition: datetime.c:1821
int64 pg_time_t
Definition: pgtime.h:23

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

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

◆ DetermineTimeZoneAbbrevOffsetTS()

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

Definition at line 1784 of file datetime.c.

1786 {
1788  int zone_offset;
1789  int abbr_offset;
1790  int tz;
1791  struct pg_tm tm;
1792  fsec_t fsec;
1793 
1794  /*
1795  * If the abbrev matches anything in the zone data, this is pretty easy.
1796  */
1797  if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1798  &abbr_offset, isdst))
1799  return abbr_offset;
1800 
1801  /*
1802  * Else, break down the timestamp so we can use DetermineTimeZoneOffset.
1803  */
1804  if (timestamp2tm(ts, &tz, &tm, &fsec, NULL, tzp) != 0)
1805  ereport(ERROR,
1806  (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
1807  errmsg("timestamp out of range")));
1808 
1809  zone_offset = DetermineTimeZoneOffset(&tm, tzp);
1810  *isdst = tm.tm_isdst;
1811  return zone_offset;
1812 }
int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm *tm, fsec_t *fsec, const char **tzn, pg_tz *attimezone)
Definition: timestamp.c:1901
pg_time_t timestamptz_to_time_t(TimestampTz t)
Definition: timestamp.c:1833
int32 fsec_t
Definition: timestamp.h:41

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 4216 of file datetime.c.

4217 {
4218  Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4219 
4220  switch (style)
4221  {
4222  case USE_ISO_DATES:
4223  case USE_XSD_DATES:
4224  /* compatible with ISO date formats */
4226  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4227  *str++ = '-';
4229  *str++ = '-';
4231  break;
4232 
4233  case USE_SQL_DATES:
4234  /* compatible with Oracle/Ingres date formats */
4235  if (DateOrder == DATEORDER_DMY)
4236  {
4238  *str++ = '/';
4240  }
4241  else
4242  {
4244  *str++ = '/';
4246  }
4247  *str++ = '/';
4249  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4250  break;
4251 
4252  case USE_GERMAN_DATES:
4253  /* German-style date format */
4255  *str++ = '.';
4257  *str++ = '.';
4259  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4260  break;
4261 
4262  case USE_POSTGRES_DATES:
4263  default:
4264  /* traditional date-only style for Postgres */
4265  if (DateOrder == DATEORDER_DMY)
4266  {
4268  *str++ = '-';
4270  }
4271  else
4272  {
4274  *str++ = '-';
4276  }
4277  *str++ = '-';
4279  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4280  break;
4281  }
4282 
4283  if (tm->tm_year <= 0)
4284  {
4285  memcpy(str, " BC", 3); /* Don't copy NUL */
4286  str += 3;
4287  }
4288  *str = '\0';
4289 }
int DateOrder
Definition: globals.c:123
#define USE_SQL_DATES
Definition: miscadmin.h:236
#define USE_POSTGRES_DATES
Definition: miscadmin.h:234
#define USE_ISO_DATES
Definition: miscadmin.h:235
#define DATEORDER_DMY
Definition: miscadmin.h:242
#define USE_XSD_DATES
Definition: miscadmin.h:238
#define USE_GERMAN_DATES
Definition: miscadmin.h:237
char * pg_ultostr_zeropad(char *str, uint32 value, int32 minwidth)
Definition: numutils.c:1269

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 4331 of file datetime.c.

4332 {
4333  int day;
4334 
4335  Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4336 
4337  /*
4338  * Negative tm_isdst means we have no valid time zone translation.
4339  */
4340  if (tm->tm_isdst < 0)
4341  print_tz = false;
4342 
4343  switch (style)
4344  {
4345  case USE_ISO_DATES:
4346  case USE_XSD_DATES:
4347  /* Compatible with ISO-8601 date formats */
4349  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4350  *str++ = '-';
4352  *str++ = '-';
4354  *str++ = (style == USE_ISO_DATES) ? ' ' : 'T';
4356  *str++ = ':';
4358  *str++ = ':';
4359  str = AppendTimestampSeconds(str, tm, fsec);
4360  if (print_tz)
4361  str = EncodeTimezone(str, tz, style);
4362  break;
4363 
4364  case USE_SQL_DATES:
4365  /* Compatible with Oracle/Ingres date formats */
4366  if (DateOrder == DATEORDER_DMY)
4367  {
4369  *str++ = '/';
4371  }
4372  else
4373  {
4375  *str++ = '/';
4377  }
4378  *str++ = '/';
4380  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4381  *str++ = ' ';
4383  *str++ = ':';
4385  *str++ = ':';
4386  str = AppendTimestampSeconds(str, tm, fsec);
4387 
4388  /*
4389  * Note: the uses of %.*s in this function would be risky if the
4390  * timezone names ever contain non-ASCII characters, since we are
4391  * not being careful to do encoding-aware clipping. However, all
4392  * TZ abbreviations in the IANA database are plain ASCII.
4393  */
4394  if (print_tz)
4395  {
4396  if (tzn)
4397  {
4398  sprintf(str, " %.*s", MAXTZLEN, tzn);
4399  str += strlen(str);
4400  }
4401  else
4402  str = EncodeTimezone(str, tz, style);
4403  }
4404  break;
4405 
4406  case USE_GERMAN_DATES:
4407  /* German variant on European style */
4409  *str++ = '.';
4411  *str++ = '.';
4413  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4414  *str++ = ' ';
4416  *str++ = ':';
4418  *str++ = ':';
4419  str = AppendTimestampSeconds(str, tm, fsec);
4420 
4421  if (print_tz)
4422  {
4423  if (tzn)
4424  {
4425  sprintf(str, " %.*s", MAXTZLEN, tzn);
4426  str += strlen(str);
4427  }
4428  else
4429  str = EncodeTimezone(str, tz, style);
4430  }
4431  break;
4432 
4433  case USE_POSTGRES_DATES:
4434  default:
4435  /* Backward-compatible with traditional Postgres abstime dates */
4436  day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
4437  tm->tm_wday = j2day(day);
4438  memcpy(str, days[tm->tm_wday], 3);
4439  str += 3;
4440  *str++ = ' ';
4441  if (DateOrder == DATEORDER_DMY)
4442  {
4444  *str++ = ' ';
4445  memcpy(str, months[tm->tm_mon - 1], 3);
4446  str += 3;
4447  }
4448  else
4449  {
4450  memcpy(str, months[tm->tm_mon - 1], 3);
4451  str += 3;
4452  *str++ = ' ';
4454  }
4455  *str++ = ' ';
4457  *str++ = ':';
4459  *str++ = ':';
4460  str = AppendTimestampSeconds(str, tm, fsec);
4461  *str++ = ' ';
4463  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4464 
4465  if (print_tz)
4466  {
4467  if (tzn)
4468  {
4469  sprintf(str, " %.*s", MAXTZLEN, tzn);
4470  str += strlen(str);
4471  }
4472  else
4473  {
4474  /*
4475  * We have a time zone, but no string version. Use the
4476  * numeric form, but be sure to include a leading space to
4477  * avoid formatting something which would be rejected by
4478  * the date/time parser later. - thomas 2001-10-19
4479  */
4480  *str++ = ' ';
4481  str = EncodeTimezone(str, tz, style);
4482  }
4483  }
4484  break;
4485  }
4486 
4487  if (tm->tm_year <= 0)
4488  {
4489  memcpy(str, " BC", 3); /* Don't copy NUL */
4490  str += 3;
4491  }
4492  *str = '\0';
4493 }
static char * EncodeTimezone(char *str, int tz, int style)
Definition: datetime.c:4178
int j2day(int date)
Definition: datetime.c:344
const char *const months[]
Definition: datetime.c:81
static char * AppendTimestampSeconds(char *cp, struct pg_tm *tm, fsec_t fsec)
Definition: datetime.c:511
const char *const days[]
Definition: datetime.c:84
#define MAXTZLEN
Definition: miscadmin.h:262
#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 4574 of file datetime.c.

4575 {
4576  char *cp = str;
4577  int year = itm->tm_year;
4578  int mon = itm->tm_mon;
4579  int64 mday = itm->tm_mday; /* tm_mday could be INT_MIN */
4580  int64 hour = itm->tm_hour;
4581  int min = itm->tm_min;
4582  int sec = itm->tm_sec;
4583  int fsec = itm->tm_usec;
4584  bool is_before = false;
4585  bool is_zero = true;
4586 
4587  /*
4588  * The sign of year and month are guaranteed to match, since they are
4589  * stored internally as "month". But we'll need to check for is_before and
4590  * is_zero when determining the signs of day and hour/minute/seconds
4591  * fields.
4592  */
4593  switch (style)
4594  {
4595  /* SQL Standard interval format */
4596  case INTSTYLE_SQL_STANDARD:
4597  {
4598  bool has_negative = year < 0 || mon < 0 ||
4599  mday < 0 || hour < 0 ||
4600  min < 0 || sec < 0 || fsec < 0;
4601  bool has_positive = year > 0 || mon > 0 ||
4602  mday > 0 || hour > 0 ||
4603  min > 0 || sec > 0 || fsec > 0;
4604  bool has_year_month = year != 0 || mon != 0;
4605  bool has_day_time = mday != 0 || hour != 0 ||
4606  min != 0 || sec != 0 || fsec != 0;
4607  bool has_day = mday != 0;
4608  bool sql_standard_value = !(has_negative && has_positive) &&
4609  !(has_year_month && has_day_time);
4610 
4611  /*
4612  * SQL Standard wants only 1 "<sign>" preceding the whole
4613  * interval ... but can't do that if mixed signs.
4614  */
4615  if (has_negative && sql_standard_value)
4616  {
4617  *cp++ = '-';
4618  year = -year;
4619  mon = -mon;
4620  mday = -mday;
4621  hour = -hour;
4622  min = -min;
4623  sec = -sec;
4624  fsec = -fsec;
4625  }
4626 
4627  if (!has_negative && !has_positive)
4628  {
4629  sprintf(cp, "0");
4630  }
4631  else if (!sql_standard_value)
4632  {
4633  /*
4634  * For non sql-standard interval values, force outputting
4635  * the signs to avoid ambiguities with intervals with
4636  * mixed sign components.
4637  */
4638  char year_sign = (year < 0 || mon < 0) ? '-' : '+';
4639  char day_sign = (mday < 0) ? '-' : '+';
4640  char sec_sign = (hour < 0 || min < 0 ||
4641  sec < 0 || fsec < 0) ? '-' : '+';
4642 
4643  sprintf(cp, "%c%d-%d %c%lld %c%lld:%02d:",
4644  year_sign, abs(year), abs(mon),
4645  day_sign, (long long) i64abs(mday),
4646  sec_sign, (long long) i64abs(hour), abs(min));
4647  cp += strlen(cp);
4648  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4649  *cp = '\0';
4650  }
4651  else if (has_year_month)
4652  {
4653  sprintf(cp, "%d-%d", year, mon);
4654  }
4655  else if (has_day)
4656  {
4657  sprintf(cp, "%lld %lld:%02d:",
4658  (long long) mday, (long long) hour, min);
4659  cp += strlen(cp);
4660  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4661  *cp = '\0';
4662  }
4663  else
4664  {
4665  sprintf(cp, "%lld:%02d:", (long long) hour, min);
4666  cp += strlen(cp);
4667  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4668  *cp = '\0';
4669  }
4670  }
4671  break;
4672 
4673  /* ISO 8601 "time-intervals by duration only" */
4674  case INTSTYLE_ISO_8601:
4675  /* special-case zero to avoid printing nothing */
4676  if (year == 0 && mon == 0 && mday == 0 &&
4677  hour == 0 && min == 0 && sec == 0 && fsec == 0)
4678  {
4679  sprintf(cp, "PT0S");
4680  break;
4681  }
4682  *cp++ = 'P';
4683  cp = AddISO8601IntPart(cp, year, 'Y');
4684  cp = AddISO8601IntPart(cp, mon, 'M');
4685  cp = AddISO8601IntPart(cp, mday, 'D');
4686  if (hour != 0 || min != 0 || sec != 0 || fsec != 0)
4687  *cp++ = 'T';
4688  cp = AddISO8601IntPart(cp, hour, 'H');
4689  cp = AddISO8601IntPart(cp, min, 'M');
4690  if (sec != 0 || fsec != 0)
4691  {
4692  if (sec < 0 || fsec < 0)
4693  *cp++ = '-';
4694  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4695  *cp++ = 'S';
4696  *cp++ = '\0';
4697  }
4698  break;
4699 
4700  /* Compatible with postgresql < 8.4 when DateStyle = 'iso' */
4701  case INTSTYLE_POSTGRES:
4702  cp = AddPostgresIntPart(cp, year, "year", &is_zero, &is_before);
4703 
4704  /*
4705  * Ideally we should spell out "month" like we do for "year" and
4706  * "day". However, for backward compatibility, we can't easily
4707  * fix this. bjm 2011-05-24
4708  */
4709  cp = AddPostgresIntPart(cp, mon, "mon", &is_zero, &is_before);
4710  cp = AddPostgresIntPart(cp, mday, "day", &is_zero, &is_before);
4711  if (is_zero || hour != 0 || min != 0 || sec != 0 || fsec != 0)
4712  {
4713  bool minus = (hour < 0 || min < 0 || sec < 0 || fsec < 0);
4714 
4715  sprintf(cp, "%s%s%02lld:%02d:",
4716  is_zero ? "" : " ",
4717  (minus ? "-" : (is_before ? "+" : "")),
4718  (long long) i64abs(hour), abs(min));
4719  cp += strlen(cp);
4720  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4721  *cp = '\0';
4722  }
4723  break;
4724 
4725  /* Compatible with postgresql < 8.4 when DateStyle != 'iso' */
4727  default:
4728  strcpy(cp, "@");
4729  cp++;
4730  cp = AddVerboseIntPart(cp, year, "year", &is_zero, &is_before);
4731  cp = AddVerboseIntPart(cp, mon, "mon", &is_zero, &is_before);
4732  cp = AddVerboseIntPart(cp, mday, "day", &is_zero, &is_before);
4733  cp = AddVerboseIntPart(cp, hour, "hour", &is_zero, &is_before);
4734  cp = AddVerboseIntPart(cp, min, "min", &is_zero, &is_before);
4735  if (sec != 0 || fsec != 0)
4736  {
4737  *cp++ = ' ';
4738  if (sec < 0 || (sec == 0 && fsec < 0))
4739  {
4740  if (is_zero)
4741  is_before = true;
4742  else if (!is_before)
4743  *cp++ = '-';
4744  }
4745  else if (is_before)
4746  *cp++ = '-';
4747  cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4748  /* We output "ago", not negatives, so use abs(). */
4749  sprintf(cp, " sec%s",
4750  (abs(sec) != 1 || fsec != 0) ? "s" : "");
4751  is_zero = false;
4752  }
4753  /* identically zero? then put in a unitless zero... */
4754  if (is_zero)
4755  strcat(cp, " 0");
4756  if (is_before)
4757  strcat(cp, " ago");
4758  break;
4759  }
4760 }
static char * AddVerboseIntPart(char *cp, int64 value, const char *units, bool *is_zero, bool *is_before)
Definition: datetime.c:4535
static char * AddPostgresIntPart(char *cp, int64 value, const char *units, bool *is_zero, bool *is_before)
Definition: datetime.c:4512
static char * AddISO8601IntPart(char *cp, int64 value, char units)
Definition: datetime.c:4502
static char * AppendSeconds(char *cp, int sec, fsec_t fsec, int precision, bool fillzeros)
Definition: datetime.c:448
#define i64abs(i)
Definition: c.h:1294
#define MAX_INTERVAL_PRECISION
Definition: timestamp.h:93
#define INTSTYLE_POSTGRES_VERBOSE
Definition: miscadmin.h:256
#define INTSTYLE_ISO_8601
Definition: miscadmin.h:258
#define INTSTYLE_POSTGRES
Definition: miscadmin.h:255
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 1596 of file timestamp.c.

1597 {
1598  if (TIMESTAMP_IS_NOBEGIN(dt))
1599  strcpy(str, EARLY);
1600  else if (TIMESTAMP_IS_NOEND(dt))
1601  strcpy(str, LATE);
1602  else /* shouldn't happen */
1603  elog(ERROR, "invalid argument for EncodeSpecialTimestamp");
1604 }
#define TIMESTAMP_IS_NOEND(j)
Definition: timestamp.h:167
#define TIMESTAMP_IS_NOBEGIN(j)
Definition: timestamp.h:162
#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 4301 of file datetime.c.

4302 {
4304  *str++ = ':';
4306  *str++ = ':';
4307  str = AppendSeconds(str, tm->tm_sec, fsec, MAX_TIME_PRECISION, true);
4308  if (print_tz)
4309  str = EncodeTimezone(str, tz, style);
4310  *str = '\0';
4311 }
#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 DecodeDateTime(), DecodeTimeOnly(), GetSQLCurrentDate(), 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:856

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

Referenced by DecodeDateTime(), DecodeTimeOnly(), GetCurrentDateTime(), GetSQLCurrentTime(), and GetSQLLocalTime().

◆ InstallTimeZoneAbbrevs()

void InstallTimeZoneAbbrevs ( TimeZoneAbbrevTable tbl)

Definition at line 4946 of file datetime.c.

4947 {
4948  zoneabbrevtbl = tbl;
4949  /* reset abbrevcache, which may contain pointers into old table */
4950  memset(abbrevcache, 0, sizeof(abbrevcache));
4951 }

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)

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(), 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 4829 of file datetime.c.

4830 {
4831  FuncExpr *expr = castNode(FuncExpr, node);
4832  Node *ret = NULL;
4833  Node *typmod;
4834 
4835  Assert(list_length(expr->args) >= 2);
4836 
4837  typmod = (Node *) lsecond(expr->args);
4838 
4839  if (IsA(typmod, Const) && !((Const *) typmod)->constisnull)
4840  {
4841  Node *source = (Node *) linitial(expr->args);
4842  int32 old_precis = exprTypmod(source);
4843  int32 new_precis = DatumGetInt32(((Const *) typmod)->constvalue);
4844 
4845  if (new_precis < 0 || new_precis == max_precis ||
4846  (old_precis >= 0 && new_precis >= old_precis))
4847  ret = relabel_to_typmod(source, new_precis);
4848  }
4849 
4850  return ret;
4851 }
int32 exprTypmod(const Node *expr)
Definition: nodeFuncs.c:298
Node * relabel_to_typmod(Node *expr, int32 typmod)
Definition: nodeFuncs.c:684
#define IsA(nodeptr, _type_)
Definition: nodes.h:158
#define castNode(_type_, nodeptr)
Definition: nodes.h:176
static int list_length(const List *l)
Definition: pg_list.h:152
#define linitial(l)
Definition: pg_list.h:178
#define lsecond(l)
Definition: pg_list.h:183
static rewind_source * source
Definition: pg_rewind.c:89
static int32 DatumGetInt32(Datum X)
Definition: postgres.h:202
List * args
Definition: primnodes.h:724
Definition: nodes.h:129

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 2497 of file datetime.c.

2499 {
2500  if (fmask & DTK_M(YEAR))
2501  {
2502  if (isjulian)
2503  {
2504  /* tm_year is correct and should not be touched */
2505  }
2506  else if (bc)
2507  {
2508  /* there is no year zero in AD/BC notation */
2509  if (tm->tm_year <= 0)
2510  return DTERR_FIELD_OVERFLOW;
2511  /* internally, we represent 1 BC as year zero, 2 BC as -1, etc */
2512  tm->tm_year = -(tm->tm_year - 1);
2513  }
2514  else if (is2digits)
2515  {
2516  /* process 1 or 2-digit input as 1970-2069 AD, allow '0' and '00' */
2517  if (tm->tm_year < 0) /* just paranoia */
2518  return DTERR_FIELD_OVERFLOW;
2519  if (tm->tm_year < 70)
2520  tm->tm_year += 2000;
2521  else if (tm->tm_year < 100)
2522  tm->tm_year += 1900;
2523  }
2524  else
2525  {
2526  /* there is no year zero in AD/BC notation */
2527  if (tm->tm_year <= 0)
2528  return DTERR_FIELD_OVERFLOW;
2529  }
2530  }
2531 
2532  /* now that we have correct year, decode DOY */
2533  if (fmask & DTK_M(DOY))
2534  {
2535  j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
2536  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2537  }
2538 
2539  /* check for valid month */
2540  if (fmask & DTK_M(MONTH))
2541  {
2542  if (tm->tm_mon < 1 || tm->tm_mon > MONTHS_PER_YEAR)
2543  return DTERR_MD_FIELD_OVERFLOW;
2544  }
2545 
2546  /* minimal check for valid day */
2547  if (fmask & DTK_M(DAY))
2548  {
2549  if (tm->tm_mday < 1 || tm->tm_mday > 31)
2550  return DTERR_MD_FIELD_OVERFLOW;
2551  }
2552 
2553  if ((fmask & DTK_DATE_M) == DTK_DATE_M)
2554  {
2555  /*
2556  * Check for valid day of month, now that we know for sure the month
2557  * and year. Note we don't use MD_FIELD_OVERFLOW here, since it seems
2558  * unlikely that "Feb 29" is a YMD-order error.
2559  */
2560  if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2561  return DTERR_FIELD_OVERFLOW;
2562  }
2563 
2564  return 0;
2565 }
const int day_tab[2][13]
Definition: datetime.c:75
#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 75 of file datetime.c.

◆ days

PGDLLIMPORT const char* const days[]
extern

Definition at line 84 of file datetime.c.

◆ months

PGDLLIMPORT const char* const months[]
extern

Definition at line 81 of file datetime.c.