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Data Structures | Macros | Typedefs | Functions | Variables
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_tz * DecodeTimezoneNameToTz (const char *tzname)
 
int DecodeTimezoneAbbrevPrefix (const char *str, int *offset, pg_tz **tz)
 
void ClearTimeZoneAbbrevCache (void)
 
int j2day (int date)
 
struct Node * TemporalSimplify (int32 max_precis, struct Node *node)
 
bool CheckDateTokenTables (void)
 
TimeZoneAbbrevTable * ConvertTimeZoneAbbrevs (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,
  u 
)
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,
  u 
)
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

typedef struct DateTimeErrorExtra DateTimeErrorExtra

◆ DynamicZoneAbbrev

typedef struct DynamicZoneAbbrev DynamicZoneAbbrev

◆ TimeZoneAbbrevTable

typedef struct TimeZoneAbbrevTable TimeZoneAbbrevTable

Function Documentation

◆ AdjustTimestampForTypmod()

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

Definition at line 368 of file timestamp.c.

369{
370 static const int64 TimestampScales[MAX_TIMESTAMP_PRECISION + 1] = {
371 INT64CONST(1000000),
372 INT64CONST(100000),
373 INT64CONST(10000),
374 INT64CONST(1000),
375 INT64CONST(100),
376 INT64CONST(10),
377 INT64CONST(1)
378 };
379
380 static const int64 TimestampOffsets[MAX_TIMESTAMP_PRECISION + 1] = {
381 INT64CONST(500000),
382 INT64CONST(50000),
383 INT64CONST(5000),
384 INT64CONST(500),
385 INT64CONST(50),
386 INT64CONST(5),
387 INT64CONST(0)
388 };
389
390 if (!TIMESTAMP_NOT_FINITE(*time)
391 && (typmod != -1) && (typmod != MAX_TIMESTAMP_PRECISION))
392 {
393 if (typmod < 0 || typmod > MAX_TIMESTAMP_PRECISION)
394 ereturn(escontext, false,
395 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
396 errmsg("timestamp(%d) precision must be between %d and %d",
397 typmod, 0, MAX_TIMESTAMP_PRECISION)));
398
399 if (*time >= INT64CONST(0))
400 {
401 *time = ((*time + TimestampOffsets[typmod]) / TimestampScales[typmod]) *
402 TimestampScales[typmod];
403 }
404 else
405 {
406 *time = -((((-*time) + TimestampOffsets[typmod]) / TimestampScales[typmod])
407 * TimestampScales[typmod]);
408 }
409 }
410
411 return true;
412}
INT64CONST
#define INT64CONST(x)
Definition: c.h:553
int64
int64_t int64
Definition: c.h:536
MAX_TIMESTAMP_PRECISION
#define MAX_TIMESTAMP_PRECISION
Definition: timestamp.h:92
TIMESTAMP_NOT_FINITE
#define TIMESTAMP_NOT_FINITE(j)
Definition: timestamp.h:169
errcode
int errcode(int sqlerrcode)
Definition: elog.c:854
errmsg
int errmsg(const char *fmt,...)
Definition: elog.c:1071
ereturn
#define ereturn(context, dummy_value,...)
Definition: elog.h:278

References ereturn, errcode(), errmsg(), INT64CONST, 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 4933 of file datetime.c.

4934{
4935 bool ok = true;
4936
4937 Assert(UNIX_EPOCH_JDATE == date2j(1970, 1, 1));
4938 Assert(POSTGRES_EPOCH_JDATE == date2j(2000, 1, 1));
4939
4940 ok &= CheckDateTokenTable("datetktbl", datetktbl, szdatetktbl);
4941 ok &= CheckDateTokenTable("deltatktbl", deltatktbl, szdeltatktbl);
4942 return ok;
4943}
CheckDateTokenTable
static bool CheckDateTokenTable(const char *tablename, const datetkn *base, int nel)
Definition: datetime.c:4901
datetktbl
static const datetkn datetktbl[]
Definition: datetime.c:105
szdeltatktbl
static const int szdeltatktbl
Definition: datetime.c:252
szdatetktbl
static const int szdatetktbl
Definition: datetime.c:181
date2j
int date2j(int year, int month, int day)
Definition: datetime.c:296
deltatktbl
static const datetkn deltatktbl[]
Definition: datetime.c:187
UNIX_EPOCH_JDATE
#define UNIX_EPOCH_JDATE
Definition: timestamp.h:234
POSTGRES_EPOCH_JDATE
#define POSTGRES_EPOCH_JDATE
Definition: timestamp.h:235
Assert
Assert(PointerIsAligned(start, uint64))

◆ ClearTimeZoneAbbrevCache()

void ClearTimeZoneAbbrevCache ( void  )

Definition at line 3227 of file datetime.c.

3228{
3229 memset(tzabbrevcache, 0, sizeof(tzabbrevcache));
3230}
tzabbrevcache
static TzAbbrevCache tzabbrevcache[MAXDATEFIELDS]
Definition: datetime.c:272

References tzabbrevcache.

Referenced by assign_timezone().

◆ ConvertTimeZoneAbbrevs()

TimeZoneAbbrevTable * ConvertTimeZoneAbbrevs ( struct tzEntry *  abbrevs,
int  n 
)

Definition at line 4995 of file datetime.c.

4996{
4997 TimeZoneAbbrevTable *tbl;
4998 Size tbl_size;
4999 int i;
5000
5001 /* Space for fixed fields and datetkn array */
5002 tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
5003 n * sizeof(datetkn);
5004 tbl_size = MAXALIGN(tbl_size);
5005 /* Count up space for dynamic abbreviations */
5006 for (i = 0; i < n; i++)
5007 {
5008 struct tzEntry *abbr = abbrevs + i;
5009
5010 if (abbr->zone != NULL)
5011 {
5012 Size dsize;
5013
5014 dsize = offsetof(DynamicZoneAbbrev, zone) +
5015 strlen(abbr->zone) + 1;
5016 tbl_size += MAXALIGN(dsize);
5017 }
5018 }
5019
5020 /* Alloc the result ... */
5021 tbl = guc_malloc(LOG, tbl_size);
5022 if (!tbl)
5023 return NULL;
5024
5025 /* ... and fill it in */
5026 tbl->tblsize = tbl_size;
5027 tbl->numabbrevs = n;
5028 /* in this loop, tbl_size reprises the space calculation above */
5029 tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
5030 n * sizeof(datetkn);
5031 tbl_size = MAXALIGN(tbl_size);
5032 for (i = 0; i < n; i++)
5033 {
5034 struct tzEntry *abbr = abbrevs + i;
5035 datetkn *dtoken = tbl->abbrevs + i;
5036
5037 /* use strlcpy to truncate name if necessary */
5038 strlcpy(dtoken->token, abbr->abbrev, TOKMAXLEN + 1);
5039 if (abbr->zone != NULL)
5040 {
5041 /* Allocate a DynamicZoneAbbrev for this abbreviation */
5042 DynamicZoneAbbrev *dtza;
5043 Size dsize;
5044
5045 dtza = (DynamicZoneAbbrev *) ((char *) tbl + tbl_size);
5046 dtza->tz = NULL;
5047 strcpy(dtza->zone, abbr->zone);
5048
5049 dtoken->type = DYNTZ;
5050 /* value is offset from table start to DynamicZoneAbbrev */
5051 dtoken->value = (int32) tbl_size;
5052
5053 dsize = offsetof(DynamicZoneAbbrev, zone) +
5054 strlen(abbr->zone) + 1;
5055 tbl_size += MAXALIGN(dsize);
5056 }
5057 else
5058 {
5059 dtoken->type = abbr->is_dst ? DTZ : TZ;
5060 dtoken->value = abbr->offset;
5061 }
5062 }
5063
5064 /* Assert the two loops above agreed on size calculations */
5065 Assert(tbl->tblsize == tbl_size);
5066
5067 /* Check the ordering, if testing */
5068 Assert(CheckDateTokenTable("timezone abbreviations", tbl->abbrevs, n));
5069
5070 return tbl;
5071}
MAXALIGN
#define MAXALIGN(LEN)
Definition: c.h:811
int32
int32_t int32
Definition: c.h:535
Size
size_t Size
Definition: c.h:611
LOG
#define LOG
Definition: elog.h:31
guc_malloc
void * guc_malloc(int elevel, size_t size)
Definition: guc.c:639
TZ
#define TZ
Definition: datetime.h:95
DTZ
#define DTZ
Definition: datetime.h:96
TOKMAXLEN
#define TOKMAXLEN
Definition: datetime.h:204
DYNTZ
#define DYNTZ
Definition: datetime.h:97
i
int i
Definition: isn.c:77
strlcpy
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
DynamicZoneAbbrev::zone
char zone[FLEXIBLE_ARRAY_MEMBER]
Definition: datetime.h:227
TimeZoneAbbrevTable::abbrevs
datetkn abbrevs[FLEXIBLE_ARRAY_MEMBER]
Definition: datetime.h:219
datetkn::token
char token[TOKMAXLEN+1]
Definition: datetime.h:209
datetkn::value
int32 value
Definition: datetime.h:211
datetkn::type
char type
Definition: datetime.h:210
tzEntry::zone
char * zone
Definition: tzparser.h:27
tzEntry::offset
int offset
Definition: tzparser.h:29
tzEntry::abbrev
char * abbrev
Definition: tzparser.h:26
tzEntry::is_dst
bool is_dst
Definition: tzparser.h:30
zone
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 296 of file datetime.c.

297{
298 int julian;
299 int century;
300
301 if (month > 2)
302 {
303 month += 1;
304 year += 4800;
305 }
306 else
307 {
308 month += 13;
309 year += 4799;
310 }
311
312 century = year / 100;
313 julian = year * 365 - 32167;
314 julian += year / 4 - century + century / 4;
315 julian += 7834 * month / 256 + day;
316
317 return julian;
318} /* date2j() */

◆ DateTimeParseError()

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

Definition at line 4214 of file datetime.c.

4217{
4218 switch (dterr)
4219 {
4220 case DTERR_FIELD_OVERFLOW:
4221 errsave(escontext,
4222 (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4223 errmsg("date/time field value out of range: \"%s\"",
4224 str)));
4225 break;
4226 case DTERR_MD_FIELD_OVERFLOW:
4227 /* <nanny>same as above, but add hint about DateStyle</nanny> */
4228 errsave(escontext,
4229 (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4230 errmsg("date/time field value out of range: \"%s\"",
4231 str),
4232 errhint("Perhaps you need a different \"DateStyle\" setting.")));
4233 break;
4234 case DTERR_INTERVAL_OVERFLOW:
4235 errsave(escontext,
4236 (errcode(ERRCODE_INTERVAL_FIELD_OVERFLOW),
4237 errmsg("interval field value out of range: \"%s\"",
4238 str)));
4239 break;
4240 case DTERR_TZDISP_OVERFLOW:
4241 errsave(escontext,
4242 (errcode(ERRCODE_INVALID_TIME_ZONE_DISPLACEMENT_VALUE),
4243 errmsg("time zone displacement out of range: \"%s\"",
4244 str)));
4245 break;
4246 case DTERR_BAD_TIMEZONE:
4247 errsave(escontext,
4248 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4249 errmsg("time zone \"%s\" not recognized",
4250 extra->dtee_timezone)));
4251 break;
4252 case DTERR_BAD_ZONE_ABBREV:
4253 errsave(escontext,
4254 (errcode(ERRCODE_CONFIG_FILE_ERROR),
4255 errmsg("time zone \"%s\" not recognized",
4256 extra->dtee_timezone),
4257 errdetail("This time zone name appears in the configuration file for time zone abbreviation \"%s\".",
4258 extra->dtee_abbrev)));
4259 break;
4260 case DTERR_BAD_FORMAT:
4261 default:
4262 errsave(escontext,
4263 (errcode(ERRCODE_INVALID_DATETIME_FORMAT),
4264 errmsg("invalid input syntax for type %s: \"%s\"",
4265 datatype, str)));
4266 break;
4267 }
4268}
errdetail
int errdetail(const char *fmt,...)
Definition: elog.c:1207
errhint
int errhint(const char *fmt,...)
Definition: elog.c:1321
errsave
#define errsave(context,...)
Definition: elog.h:262
str
const char * str
Definition: hashfn_unstable.h:254
DTERR_BAD_ZONE_ABBREV
#define DTERR_BAD_ZONE_ABBREV
Definition: datetime.h:288
DTERR_INTERVAL_OVERFLOW
#define DTERR_INTERVAL_OVERFLOW
Definition: datetime.h:285
DTERR_BAD_TIMEZONE
#define DTERR_BAD_TIMEZONE
Definition: datetime.h:287
DTERR_BAD_FORMAT
#define DTERR_BAD_FORMAT
Definition: datetime.h:282
DTERR_TZDISP_OVERFLOW
#define DTERR_TZDISP_OVERFLOW
Definition: datetime.h:286
DTERR_FIELD_OVERFLOW
#define DTERR_FIELD_OVERFLOW
Definition: datetime.h:283
DTERR_MD_FIELD_OVERFLOW
#define DTERR_MD_FIELD_OVERFLOW
Definition: datetime.h:284
DateTimeErrorExtra::dtee_timezone
const char * dtee_timezone
Definition: datetime.h:293
DateTimeErrorExtra::dtee_abbrev
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 str.

Referenced by date_in(), DecodeTimezoneName(), do_to_timestamp(), interval_in(), pg_timezone_abbrevs_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 997 of file datetime.c.

1000{
1001 int fmask = 0,
1002 tmask,
1003 type;
1004 int ptype = 0; /* "prefix type" for ISO and Julian formats */
1005 int i;
1006 int val;
1007 int dterr;
1008 int mer = HR24;
1009 bool haveTextMonth = false;
1010 bool isjulian = false;
1011 bool is2digits = false;
1012 bool bc = false;
1013 pg_tz *namedTz = NULL;
1014 pg_tz *abbrevTz = NULL;
1015 pg_tz *valtz;
1016 char *abbrev = NULL;
1017 struct pg_tm cur_tm;
1018
1019 /*
1020 * We'll insist on at least all of the date fields, but initialize the
1021 * remaining fields in case they are not set later...
1022 */
1023 *dtype = DTK_DATE;
1024 tm->tm_hour = 0;
1025 tm->tm_min = 0;
1026 tm->tm_sec = 0;
1027 *fsec = 0;
1028 /* don't know daylight savings time status apriori */
1029 tm->tm_isdst = -1;
1030 if (tzp != NULL)
1031 *tzp = 0;
1032
1033 for (i = 0; i < nf; i++)
1034 {
1035 switch (ftype[i])
1036 {
1037 case DTK_DATE:
1038
1039 /*
1040 * Integral julian day with attached time zone? All other
1041 * forms with JD will be separated into distinct fields, so we
1042 * handle just this case here.
1043 */
1044 if (ptype == DTK_JULIAN)
1045 {
1046 char *cp;
1047 int jday;
1048
1049 if (tzp == NULL)
1050 return DTERR_BAD_FORMAT;
1051
1052 errno = 0;
1053 jday = strtoint(field[i], &cp, 10);
1054 if (errno == ERANGE || jday < 0)
1055 return DTERR_FIELD_OVERFLOW;
1056
1057 j2date(jday, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1058 isjulian = true;
1059
1060 /* Get the time zone from the end of the string */
1061 dterr = DecodeTimezone(cp, tzp);
1062 if (dterr)
1063 return dterr;
1064
1065 tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1066 ptype = 0;
1067 break;
1068 }
1069
1070 /*
1071 * Already have a date? Then this might be a time zone name
1072 * with embedded punctuation (e.g. "America/New_York") or a
1073 * run-together time with trailing time zone (e.g. hhmmss-zz).
1074 * - thomas 2001-12-25
1075 *
1076 * We consider it a time zone if we already have month & day.
1077 * This is to allow the form "mmm dd hhmmss tz year", which
1078 * we've historically accepted.
1079 */
1080 else if (ptype != 0 ||
1081 ((fmask & (DTK_M(MONTH) | DTK_M(DAY))) ==
1082 (DTK_M(MONTH) | DTK_M(DAY))))
1083 {
1084 /* No time zone accepted? Then quit... */
1085 if (tzp == NULL)
1086 return DTERR_BAD_FORMAT;
1087
1088 if (isdigit((unsigned char) *field[i]) || ptype != 0)
1089 {
1090 char *cp;
1091
1092 /*
1093 * Allow a preceding "t" field, but no other units.
1094 */
1095 if (ptype != 0)
1096 {
1097 /* Sanity check; should not fail this test */
1098 if (ptype != DTK_TIME)
1099 return DTERR_BAD_FORMAT;
1100 ptype = 0;
1101 }
1102
1103 /*
1104 * Starts with a digit but we already have a time
1105 * field? Then we are in trouble with a date and time
1106 * already...
1107 */
1108 if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1109 return DTERR_BAD_FORMAT;
1110
1111 if ((cp = strchr(field[i], '-')) == NULL)
1112 return DTERR_BAD_FORMAT;
1113
1114 /* Get the time zone from the end of the string */
1115 dterr = DecodeTimezone(cp, tzp);
1116 if (dterr)
1117 return dterr;
1118 *cp = '\0';
1119
1120 /*
1121 * Then read the rest of the field as a concatenated
1122 * time
1123 */
1124 dterr = DecodeNumberField(strlen(field[i]), field[i],
1125 fmask,
1126 &tmask, tm,
1127 fsec, &is2digits);
1128 if (dterr < 0)
1129 return dterr;
1130
1131 /*
1132 * modify tmask after returning from
1133 * DecodeNumberField()
1134 */
1135 tmask |= DTK_M(TZ);
1136 }
1137 else
1138 {
1139 namedTz = pg_tzset(field[i]);
1140 if (!namedTz)
1141 {
1142 extra->dtee_timezone = field[i];
1143 return DTERR_BAD_TIMEZONE;
1144 }
1145 /* we'll apply the zone setting below */
1146 tmask = DTK_M(TZ);
1147 }
1148 }
1149 else
1150 {
1151 dterr = DecodeDate(field[i], fmask,
1152 &tmask, &is2digits, tm);
1153 if (dterr)
1154 return dterr;
1155 }
1156 break;
1157
1158 case DTK_TIME:
1159
1160 /*
1161 * This might be an ISO time following a "t" field.
1162 */
1163 if (ptype != 0)
1164 {
1165 /* Sanity check; should not fail this test */
1166 if (ptype != DTK_TIME)
1167 return DTERR_BAD_FORMAT;
1168 ptype = 0;
1169 }
1170 dterr = DecodeTime(field[i], fmask, INTERVAL_FULL_RANGE,
1171 &tmask, tm, fsec);
1172 if (dterr)
1173 return dterr;
1174
1175 /* check for time overflow */
1176 if (time_overflows(tm->tm_hour, tm->tm_min, tm->tm_sec,
1177 *fsec))
1178 return DTERR_FIELD_OVERFLOW;
1179 break;
1180
1181 case DTK_TZ:
1182 {
1183 int tz;
1184
1185 if (tzp == NULL)
1186 return DTERR_BAD_FORMAT;
1187
1188 dterr = DecodeTimezone(field[i], &tz);
1189 if (dterr)
1190 return dterr;
1191 *tzp = tz;
1192 tmask = DTK_M(TZ);
1193 }
1194 break;
1195
1196 case DTK_NUMBER:
1197
1198 /*
1199 * Deal with cases where previous field labeled this one
1200 */
1201 if (ptype != 0)
1202 {
1203 char *cp;
1204 int value;
1205
1206 errno = 0;
1207 value = strtoint(field[i], &cp, 10);
1208 if (errno == ERANGE)
1209 return DTERR_FIELD_OVERFLOW;
1210 if (*cp != '.' && *cp != '\0')
1211 return DTERR_BAD_FORMAT;
1212
1213 switch (ptype)
1214 {
1215 case DTK_JULIAN:
1216 /* previous field was a label for "julian date" */
1217 if (value < 0)
1218 return DTERR_FIELD_OVERFLOW;
1219 tmask = DTK_DATE_M;
1220 j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1221 isjulian = true;
1222
1223 /* fractional Julian Day? */
1224 if (*cp == '.')
1225 {
1226 double time;
1227
1228 dterr = ParseFraction(cp, &time);
1229 if (dterr)
1230 return dterr;
1231 time *= USECS_PER_DAY;
1232 dt2time(time,
1233 &tm->tm_hour, &tm->tm_min,
1234 &tm->tm_sec, fsec);
1235 tmask |= DTK_TIME_M;
1236 }
1237 break;
1238
1239 case DTK_TIME:
1240 /* previous field was "t" for ISO time */
1241 dterr = DecodeNumberField(strlen(field[i]), field[i],
1242 (fmask | DTK_DATE_M),
1243 &tmask, tm,
1244 fsec, &is2digits);
1245 if (dterr < 0)
1246 return dterr;
1247 if (tmask != DTK_TIME_M)
1248 return DTERR_BAD_FORMAT;
1249 break;
1250
1251 default:
1252 return DTERR_BAD_FORMAT;
1253 break;
1254 }
1255
1256 ptype = 0;
1257 *dtype = DTK_DATE;
1258 }
1259 else
1260 {
1261 char *cp;
1262 int flen;
1263
1264 flen = strlen(field[i]);
1265 cp = strchr(field[i], '.');
1266
1267 /* Embedded decimal and no date yet? */
1268 if (cp != NULL && !(fmask & DTK_DATE_M))
1269 {
1270 dterr = DecodeDate(field[i], fmask,
1271 &tmask, &is2digits, tm);
1272 if (dterr)
1273 return dterr;
1274 }
1275 /* embedded decimal and several digits before? */
1276 else if (cp != NULL && flen - strlen(cp) > 2)
1277 {
1278 /*
1279 * Interpret as a concatenated date or time Set the
1280 * type field to allow decoding other fields later.
1281 * Example: 20011223 or 040506
1282 */
1283 dterr = DecodeNumberField(flen, field[i], fmask,
1284 &tmask, tm,
1285 fsec, &is2digits);
1286 if (dterr < 0)
1287 return dterr;
1288 }
1289
1290 /*
1291 * Is this a YMD or HMS specification, or a year number?
1292 * YMD and HMS are required to be six digits or more, so
1293 * if it is 5 digits, it is a year. If it is six or more
1294 * digits, we assume it is YMD or HMS unless no date and
1295 * no time values have been specified. This forces 6+
1296 * digit years to be at the end of the string, or to use
1297 * the ISO date specification.
1298 */
1299 else if (flen >= 6 && (!(fmask & DTK_DATE_M) ||
1300 !(fmask & DTK_TIME_M)))
1301 {
1302 dterr = DecodeNumberField(flen, field[i], fmask,
1303 &tmask, tm,
1304 fsec, &is2digits);
1305 if (dterr < 0)
1306 return dterr;
1307 }
1308 /* otherwise it is a single date/time field... */
1309 else
1310 {
1311 dterr = DecodeNumber(flen, field[i],
1312 haveTextMonth, fmask,
1313 &tmask, tm,
1314 fsec, &is2digits);
1315 if (dterr)
1316 return dterr;
1317 }
1318 }
1319 break;
1320
1321 case DTK_STRING:
1322 case DTK_SPECIAL:
1323 /* timezone abbrevs take precedence over built-in tokens */
1324 dterr = DecodeTimezoneAbbrev(i, field[i],
1325 &type, &val, &valtz, extra);
1326 if (dterr)
1327 return dterr;
1328 if (type == UNKNOWN_FIELD)
1329 type = DecodeSpecial(i, field[i], &val);
1330 if (type == IGNORE_DTF)
1331 continue;
1332
1333 tmask = DTK_M(type);
1334 switch (type)
1335 {
1336 case RESERV:
1337 switch (val)
1338 {
1339 case DTK_NOW:
1340 tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
1341 *dtype = DTK_DATE;
1342 GetCurrentTimeUsec(tm, fsec, tzp);
1343 break;
1344
1345 case DTK_YESTERDAY:
1346 tmask = DTK_DATE_M;
1347 *dtype = DTK_DATE;
1348 GetCurrentDateTime(&cur_tm);
1349 j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) - 1,
1350 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1351 break;
1352
1353 case DTK_TODAY:
1354 tmask = DTK_DATE_M;
1355 *dtype = DTK_DATE;
1356 GetCurrentDateTime(&cur_tm);
1357 tm->tm_year = cur_tm.tm_year;
1358 tm->tm_mon = cur_tm.tm_mon;
1359 tm->tm_mday = cur_tm.tm_mday;
1360 break;
1361
1362 case DTK_TOMORROW:
1363 tmask = DTK_DATE_M;
1364 *dtype = DTK_DATE;
1365 GetCurrentDateTime(&cur_tm);
1366 j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) + 1,
1367 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1368 break;
1369
1370 case DTK_ZULU:
1371 tmask = (DTK_TIME_M | DTK_M(TZ));
1372 *dtype = DTK_DATE;
1373 tm->tm_hour = 0;
1374 tm->tm_min = 0;
1375 tm->tm_sec = 0;
1376 if (tzp != NULL)
1377 *tzp = 0;
1378 break;
1379
1380 case DTK_EPOCH:
1381 case DTK_LATE:
1382 case DTK_EARLY:
1383 tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
1384 *dtype = val;
1385 /* caller ignores tm for these dtype codes */
1386 break;
1387
1388 default:
1389 elog(ERROR, "unrecognized RESERV datetime token: %d",
1390 val);
1391 }
1392
1393 break;
1394
1395 case MONTH:
1396
1397 /*
1398 * already have a (numeric) month? then see if we can
1399 * substitute...
1400 */
1401 if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
1402 !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 &&
1403 tm->tm_mon <= 31)
1404 {
1405 tm->tm_mday = tm->tm_mon;
1406 tmask = DTK_M(DAY);
1407 }
1408 haveTextMonth = true;
1409 tm->tm_mon = val;
1410 break;
1411
1412 case DTZMOD:
1413
1414 /*
1415 * daylight savings time modifier (solves "MET DST"
1416 * syntax)
1417 */
1418 tmask |= DTK_M(DTZ);
1419 tm->tm_isdst = 1;
1420 if (tzp == NULL)
1421 return DTERR_BAD_FORMAT;
1422 *tzp -= val;
1423 break;
1424
1425 case DTZ:
1426
1427 /*
1428 * set mask for TZ here _or_ check for DTZ later when
1429 * getting default timezone
1430 */
1431 tmask |= DTK_M(TZ);
1432 tm->tm_isdst = 1;
1433 if (tzp == NULL)
1434 return DTERR_BAD_FORMAT;
1435 *tzp = -val;
1436 break;
1437
1438 case TZ:
1439 tm->tm_isdst = 0;
1440 if (tzp == NULL)
1441 return DTERR_BAD_FORMAT;
1442 *tzp = -val;
1443 break;
1444
1445 case DYNTZ:
1446 tmask |= DTK_M(TZ);
1447 if (tzp == NULL)
1448 return DTERR_BAD_FORMAT;
1449 /* we'll determine the actual offset later */
1450 abbrevTz = valtz;
1451 abbrev = field[i];
1452 break;
1453
1454 case AMPM:
1455 mer = val;
1456 break;
1457
1458 case ADBC:
1459 bc = (val == BC);
1460 break;
1461
1462 case DOW:
1463 tm->tm_wday = val;
1464 break;
1465
1466 case UNITS:
1467 tmask = 0;
1468 /* reject consecutive unhandled units */
1469 if (ptype != 0)
1470 return DTERR_BAD_FORMAT;
1471 ptype = val;
1472 break;
1473
1474 case ISOTIME:
1475
1476 /*
1477 * This is a filler field "t" indicating that the next
1478 * field is time. Try to verify that this is sensible.
1479 */
1480 tmask = 0;
1481
1482 /* No preceding date? Then quit... */
1483 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1484 return DTERR_BAD_FORMAT;
1485
1486 /* reject consecutive unhandled units */
1487 if (ptype != 0)
1488 return DTERR_BAD_FORMAT;
1489 ptype = val;
1490 break;
1491
1492 case UNKNOWN_FIELD:
1493
1494 /*
1495 * Before giving up and declaring error, check to see
1496 * if it is an all-alpha timezone name.
1497 */
1498 namedTz = pg_tzset(field[i]);
1499 if (!namedTz)
1500 return DTERR_BAD_FORMAT;
1501 /* we'll apply the zone setting below */
1502 tmask = DTK_M(TZ);
1503 break;
1504
1505 default:
1506 return DTERR_BAD_FORMAT;
1507 }
1508 break;
1509
1510 default:
1511 return DTERR_BAD_FORMAT;
1512 }
1513
1514 if (tmask & fmask)
1515 return DTERR_BAD_FORMAT;
1516 fmask |= tmask;
1517 } /* end loop over fields */
1518
1519 /* reject if prefix type appeared and was never handled */
1520 if (ptype != 0)
1521 return DTERR_BAD_FORMAT;
1522
1523 /* do additional checking for normal date specs (but not "infinity" etc) */
1524 if (*dtype == DTK_DATE)
1525 {
1526 /* do final checking/adjustment of Y/M/D fields */
1527 dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
1528 if (dterr)
1529 return dterr;
1530
1531 /* handle AM/PM */
1532 if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
1533 return DTERR_FIELD_OVERFLOW;
1534 if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
1535 tm->tm_hour = 0;
1536 else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
1537 tm->tm_hour += HOURS_PER_DAY / 2;
1538
1539 /* check for incomplete input */
1540 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1541 {
1542 if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1543 return 1;
1544 return DTERR_BAD_FORMAT;
1545 }
1546
1547 /*
1548 * If we had a full timezone spec, compute the offset (we could not do
1549 * it before, because we need the date to resolve DST status).
1550 */
1551 if (namedTz != NULL)
1552 {
1553 /* daylight savings time modifier disallowed with full TZ */
1554 if (fmask & DTK_M(DTZMOD))
1555 return DTERR_BAD_FORMAT;
1556
1557 *tzp = DetermineTimeZoneOffset(tm, namedTz);
1558 }
1559
1560 /*
1561 * Likewise, if we had a dynamic timezone abbreviation, resolve it
1562 * now.
1563 */
1564 if (abbrevTz != NULL)
1565 {
1566 /* daylight savings time modifier disallowed with dynamic TZ */
1567 if (fmask & DTK_M(DTZMOD))
1568 return DTERR_BAD_FORMAT;
1569
1570 *tzp = DetermineTimeZoneAbbrevOffset(tm, abbrev, abbrevTz);
1571 }
1572
1573 /* timezone not specified? then use session timezone */
1574 if (tzp != NULL && !(fmask & DTK_M(TZ)))
1575 {
1576 /*
1577 * daylight savings time modifier but no standard timezone? then
1578 * error
1579 */
1580 if (fmask & DTK_M(DTZMOD))
1581 return DTERR_BAD_FORMAT;
1582
1583 *tzp = DetermineTimeZoneOffset(tm, session_timezone);
1584 }
1585 }
1586
1587 return 0;
1588}
DecodeDate
static int DecodeDate(char *str, int fmask, int *tmask, bool *is2digits, struct pg_tm *tm)
Definition: datetime.c:2451
DecodeNumberField
static int DecodeNumberField(int len, char *str, int fmask, int *tmask, struct pg_tm *tm, fsec_t *fsec, bool *is2digits)
Definition: datetime.c:2965
ParseFraction
static int ParseFraction(char *cp, double *frac)
Definition: datetime.c:690
DecodeNumber
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:2780
DetermineTimeZoneOffset
int DetermineTimeZoneOffset(struct pg_tm *tm, pg_tz *tzp)
Definition: datetime.c:1604
DecodeTimezoneAbbrev
int DecodeTimezoneAbbrev(int field, const char *lowtoken, int *ftype, int *offset, pg_tz **tz, DateTimeErrorExtra *extra)
Definition: datetime.c:3141
DecodeTime
static int DecodeTime(char *str, int fmask, int range, int *tmask, struct pg_tm *tm, fsec_t *fsec)
Definition: datetime.c:2725
ValidateDate
int ValidateDate(int fmask, bool isjulian, bool is2digits, bool bc, struct pg_tm *tm)
Definition: datetime.c:2561
DecodeSpecial
int DecodeSpecial(int field, const char *lowtoken, int *val)
Definition: datetime.c:3246
j2date
void j2date(int jd, int *year, int *month, int *day)
Definition: datetime.c:321
GetCurrentDateTime
void GetCurrentDateTime(struct pg_tm *tm)
Definition: datetime.c:376
DecodeTimezone
int DecodeTimezone(const char *str, int *tzp)
Definition: datetime.c:3057
GetCurrentTimeUsec
void GetCurrentTimeUsec(struct pg_tm *tm, fsec_t *fsec, int *tzp)
Definition: datetime.c:397
DetermineTimeZoneAbbrevOffset
int DetermineTimeZoneAbbrevOffset(struct pg_tm *tm, const char *abbr, pg_tz *tzp)
Definition: datetime.c:1765
dt2time
void dt2time(Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec)
Definition: timestamp.c:1883
USECS_PER_DAY
#define USECS_PER_DAY
Definition: timestamp.h:131
HOURS_PER_DAY
#define HOURS_PER_DAY
Definition: timestamp.h:118
time_overflows
bool time_overflows(int hour, int min, int sec, fsec_t fsec)
Definition: date.c:1574
ERROR
#define ERROR
Definition: elog.h:39
elog
#define elog(elevel,...)
Definition: elog.h:226
DTK_TOMORROW
#define DTK_TOMORROW
Definition: datetime.h:156
DTK_EPOCH
#define DTK_EPOCH
Definition: datetime.h:152
DTK_SPECIAL
#define DTK_SPECIAL
Definition: datetime.h:149
AMPM
#define AMPM
Definition: datetime.h:99
DTK_TIME
#define DTK_TIME
Definition: datetime.h:145
UNKNOWN_FIELD
#define UNKNOWN_FIELD
Definition: datetime.h:124
PM
#define PM
Definition: datetime.h:72
DTK_NUMBER
#define DTK_NUMBER
Definition: datetime.h:141
DTK_STRING
#define DTK_STRING
Definition: datetime.h:142
DTK_JULIAN
#define DTK_JULIAN
Definition: datetime.h:173
MONTH
#define MONTH
Definition: datetime.h:91
IGNORE_DTF
#define IGNORE_DTF
Definition: datetime.h:98
DTK_TIME_M
#define DTK_TIME_M
Definition: datetime.h:192
DTK_M
#define DTK_M(t)
Definition: datetime.h:187
DAY
#define DAY
Definition: datetime.h:93
ADBC
#define ADBC
Definition: datetime.h:108
DTK_LATE
#define DTK_LATE
Definition: datetime.h:151
DTK_DATE
#define DTK_DATE
Definition: datetime.h:144
RESERV
#define RESERV
Definition: datetime.h:90
BC
#define BC
Definition: datetime.h:76
HR24
#define HR24
Definition: datetime.h:73
DTK_DATE_M
#define DTK_DATE_M
Definition: datetime.h:191
DTK_EARLY
#define DTK_EARLY
Definition: datetime.h:150
DTZMOD
#define DTZMOD
Definition: datetime.h:122
DTK_TZ
#define DTK_TZ
Definition: datetime.h:146
DOW
#define DOW
Definition: datetime.h:106
ISOTIME
#define ISOTIME
Definition: datetime.h:115
AM
#define AM
Definition: datetime.h:71
DTK_YESTERDAY
#define DTK_YESTERDAY
Definition: datetime.h:154
DTK_ZULU
#define DTK_ZULU
Definition: datetime.h:157
UNITS
#define UNITS
Definition: datetime.h:107
DTK_TODAY
#define DTK_TODAY
Definition: datetime.h:155
DTK_NOW
#define DTK_NOW
Definition: datetime.h:153
val
long val
Definition: informix.c:689
value
static struct @166 value
tm
static struct pg_tm tm
Definition: localtime.c:104
pg_tzset
pg_tz * pg_tzset(const char *tzname)
Definition: pgtz.c:234
session_timezone
PGDLLIMPORT pg_tz * session_timezone
Definition: pgtz.c:28
strtoint
int strtoint(const char *pg_restrict str, char **pg_restrict endptr, int base)
Definition: string.c:50
pg_tm
Definition: pgtime.h:35
pg_tm::tm_hour
int tm_hour
Definition: pgtime.h:38
pg_tm::tm_mday
int tm_mday
Definition: pgtime.h:39
pg_tm::tm_mon
int tm_mon
Definition: pgtime.h:40
pg_tm::tm_min
int tm_min
Definition: pgtime.h:37
pg_tm::tm_wday
int tm_wday
Definition: pgtime.h:42
pg_tm::tm_sec
int tm_sec
Definition: pgtime.h:36
pg_tm::tm_isdst
int tm_isdst
Definition: pgtime.h:44
pg_tm::tm_year
int tm_year
Definition: pgtime.h:41
pg_tz
Definition: pgtz.h:66
INTERVAL_FULL_RANGE
#define INTERVAL_FULL_RANGE
Definition: timestamp.h:76
type
const char * type
Definition: wait_event_funcs.c:27

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 3486 of file datetime.c.

3488{
3489 bool force_negative = false;
3490 bool is_before = false;
3491 bool parsing_unit_val = false;
3492 char *cp;
3493 int fmask = 0,
3494 tmask,
3495 type,
3496 uval;
3497 int i;
3498 int dterr;
3499 int64 val;
3500 double fval;
3501
3502 *dtype = DTK_DELTA;
3503 type = IGNORE_DTF;
3504 ClearPgItmIn(itm_in);
3505
3506 /*----------
3507 * The SQL standard defines the interval literal
3508 * '-1 1:00:00'
3509 * to mean "negative 1 days and negative 1 hours", while Postgres
3510 * traditionally treats this as meaning "negative 1 days and positive
3511 * 1 hours". In SQL_STANDARD intervalstyle, we apply the leading sign
3512 * to all fields if there are no other explicit signs.
3513 *
3514 * We leave the signs alone if there are additional explicit signs.
3515 * This protects us against misinterpreting postgres-style dump output,
3516 * since the postgres-style output code has always put an explicit sign on
3517 * all fields following a negative field. But note that SQL-spec output
3518 * is ambiguous and can be misinterpreted on load! (So it's best practice
3519 * to dump in postgres style, not SQL style.)
3520 *----------
3521 */
3522 if (IntervalStyle == INTSTYLE_SQL_STANDARD && nf > 0 && *field[0] == '-')
3523 {
3524 force_negative = true;
3525 /* Check for additional explicit signs */
3526 for (i = 1; i < nf; i++)
3527 {
3528 if (*field[i] == '-' || *field[i] == '+')
3529 {
3530 force_negative = false;
3531 break;
3532 }
3533 }
3534 }
3535
3536 /* read through list backwards to pick up units before values */
3537 for (i = nf - 1; i >= 0; i--)
3538 {
3539 switch (ftype[i])
3540 {
3541 case DTK_TIME:
3542 dterr = DecodeTimeForInterval(field[i], fmask, range,
3543 &tmask, itm_in);
3544 if (dterr)
3545 return dterr;
3546 if (force_negative &&
3547 itm_in->tm_usec > 0)
3548 itm_in->tm_usec = -itm_in->tm_usec;
3549 type = DTK_DAY;
3550 parsing_unit_val = false;
3551 break;
3552
3553 case DTK_TZ:
3554
3555 /*
3556 * Timezone means a token with a leading sign character and at
3557 * least one digit; there could be ':', '.', '-' embedded in
3558 * it as well.
3559 */
3560 Assert(*field[i] == '-' || *field[i] == '+');
3561
3562 /*
3563 * Check for signed hh:mm or hh:mm:ss. If so, process exactly
3564 * like DTK_TIME case above, plus handling the sign.
3565 */
3566 if (strchr(field[i] + 1, ':') != NULL &&
3567 DecodeTimeForInterval(field[i] + 1, fmask, range,
3568 &tmask, itm_in) == 0)
3569 {
3570 if (*field[i] == '-')
3571 {
3572 /* flip the sign on time field */
3573 if (itm_in->tm_usec == PG_INT64_MIN)
3574 return DTERR_FIELD_OVERFLOW;
3575 itm_in->tm_usec = -itm_in->tm_usec;
3576 }
3577
3578 if (force_negative &&
3579 itm_in->tm_usec > 0)
3580 itm_in->tm_usec = -itm_in->tm_usec;
3581
3582 /*
3583 * Set the next type to be a day, if units are not
3584 * specified. This handles the case of '1 +02:03' since we
3585 * are reading right to left.
3586 */
3587 type = DTK_DAY;
3588 parsing_unit_val = false;
3589 break;
3590 }
3591
3592 /*
3593 * Otherwise, fall through to DTK_NUMBER case, which can
3594 * handle signed float numbers and signed year-month values.
3595 */
3596
3597 /* FALLTHROUGH */
3598
3599 case DTK_DATE:
3600 case DTK_NUMBER:
3601 if (type == IGNORE_DTF)
3602 {
3603 /* use typmod to decide what rightmost field is */
3604 switch (range)
3605 {
3606 case INTERVAL_MASK(YEAR):
3607 type = DTK_YEAR;
3608 break;
3609 case INTERVAL_MASK(MONTH):
3610 case INTERVAL_MASK(YEAR) | INTERVAL_MASK(MONTH):
3611 type = DTK_MONTH;
3612 break;
3613 case INTERVAL_MASK(DAY):
3614 type = DTK_DAY;
3615 break;
3616 case INTERVAL_MASK(HOUR):
3617 case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR):
3618 type = DTK_HOUR;
3619 break;
3620 case INTERVAL_MASK(MINUTE):
3621 case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
3622 case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
3623 type = DTK_MINUTE;
3624 break;
3625 case INTERVAL_MASK(SECOND):
3626 case INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
3627 case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
3628 case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
3629 type = DTK_SECOND;
3630 break;
3631 default:
3632 type = DTK_SECOND;
3633 break;
3634 }
3635 }
3636
3637 errno = 0;
3638 val = strtoi64(field[i], &cp, 10);
3639 if (errno == ERANGE)
3640 return DTERR_FIELD_OVERFLOW;
3641
3642 if (*cp == '-')
3643 {
3644 /* SQL "years-months" syntax */
3645 int val2;
3646
3647 val2 = strtoint(cp + 1, &cp, 10);
3648 if (errno == ERANGE || val2 < 0 || val2 >= MONTHS_PER_YEAR)
3649 return DTERR_FIELD_OVERFLOW;
3650 if (*cp != '\0')
3651 return DTERR_BAD_FORMAT;
3652 type = DTK_MONTH;
3653 if (*field[i] == '-')
3654 val2 = -val2;
3655 if (pg_mul_s64_overflow(val, MONTHS_PER_YEAR, &val))
3656 return DTERR_FIELD_OVERFLOW;
3657 if (pg_add_s64_overflow(val, val2, &val))
3658 return DTERR_FIELD_OVERFLOW;
3659 fval = 0;
3660 }
3661 else if (*cp == '.')
3662 {
3663 dterr = ParseFraction(cp, &fval);
3664 if (dterr)
3665 return dterr;
3666 if (*field[i] == '-')
3667 fval = -fval;
3668 }
3669 else if (*cp == '\0')
3670 fval = 0;
3671 else
3672 return DTERR_BAD_FORMAT;
3673
3674 tmask = 0; /* DTK_M(type); */
3675
3676 if (force_negative)
3677 {
3678 /* val and fval should be of same sign, but test anyway */
3679 if (val > 0)
3680 val = -val;
3681 if (fval > 0)
3682 fval = -fval;
3683 }
3684
3685 switch (type)
3686 {
3687 case DTK_MICROSEC:
3688 if (!AdjustMicroseconds(val, fval, 1, itm_in))
3689 return DTERR_FIELD_OVERFLOW;
3690 tmask = DTK_M(MICROSECOND);
3691 break;
3692
3693 case DTK_MILLISEC:
3694 if (!AdjustMicroseconds(val, fval, 1000, itm_in))
3695 return DTERR_FIELD_OVERFLOW;
3696 tmask = DTK_M(MILLISECOND);
3697 break;
3698
3699 case DTK_SECOND:
3700 if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
3701 return DTERR_FIELD_OVERFLOW;
3702
3703 /*
3704 * If any subseconds were specified, consider this
3705 * microsecond and millisecond input as well.
3706 */
3707 if (fval == 0)
3708 tmask = DTK_M(SECOND);
3709 else
3710 tmask = DTK_ALL_SECS_M;
3711 break;
3712
3713 case DTK_MINUTE:
3714 if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3715 return DTERR_FIELD_OVERFLOW;
3716 tmask = DTK_M(MINUTE);
3717 break;
3718
3719 case DTK_HOUR:
3720 if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3721 return DTERR_FIELD_OVERFLOW;
3722 tmask = DTK_M(HOUR);
3723 type = DTK_DAY; /* set for next field */
3724 break;
3725
3726 case DTK_DAY:
3727 if (!AdjustDays(val, 1, itm_in) ||
3728 !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3729 return DTERR_FIELD_OVERFLOW;
3730 tmask = DTK_M(DAY);
3731 break;
3732
3733 case DTK_WEEK:
3734 if (!AdjustDays(val, 7, itm_in) ||
3735 !AdjustFractDays(fval, 7, itm_in))
3736 return DTERR_FIELD_OVERFLOW;
3737 tmask = DTK_M(WEEK);
3738 break;
3739
3740 case DTK_MONTH:
3741 if (!AdjustMonths(val, itm_in) ||
3742 !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3743 return DTERR_FIELD_OVERFLOW;
3744 tmask = DTK_M(MONTH);
3745 break;
3746
3747 case DTK_YEAR:
3748 if (!AdjustYears(val, 1, itm_in) ||
3749 !AdjustFractYears(fval, 1, itm_in))
3750 return DTERR_FIELD_OVERFLOW;
3751 tmask = DTK_M(YEAR);
3752 break;
3753
3754 case DTK_DECADE:
3755 if (!AdjustYears(val, 10, itm_in) ||
3756 !AdjustFractYears(fval, 10, itm_in))
3757 return DTERR_FIELD_OVERFLOW;
3758 tmask = DTK_M(DECADE);
3759 break;
3760
3761 case DTK_CENTURY:
3762 if (!AdjustYears(val, 100, itm_in) ||
3763 !AdjustFractYears(fval, 100, itm_in))
3764 return DTERR_FIELD_OVERFLOW;
3765 tmask = DTK_M(CENTURY);
3766 break;
3767
3768 case DTK_MILLENNIUM:
3769 if (!AdjustYears(val, 1000, itm_in) ||
3770 !AdjustFractYears(fval, 1000, itm_in))
3771 return DTERR_FIELD_OVERFLOW;
3772 tmask = DTK_M(MILLENNIUM);
3773 break;
3774
3775 default:
3776 return DTERR_BAD_FORMAT;
3777 }
3778 parsing_unit_val = false;
3779 break;
3780
3781 case DTK_STRING:
3782 case DTK_SPECIAL:
3783 /* reject consecutive unhandled units */
3784 if (parsing_unit_val)
3785 return DTERR_BAD_FORMAT;
3786 type = DecodeUnits(i, field[i], &uval);
3787 if (type == UNKNOWN_FIELD)
3788 type = DecodeSpecial(i, field[i], &uval);
3789 if (type == IGNORE_DTF)
3790 continue;
3791
3792 tmask = 0; /* DTK_M(type); */
3793 switch (type)
3794 {
3795 case UNITS:
3796 type = uval;
3797 parsing_unit_val = true;
3798 break;
3799
3800 case AGO:
3801
3802 /*
3803 * "ago" is only allowed to appear at the end of the
3804 * interval.
3805 */
3806 if (i != nf - 1)
3807 return DTERR_BAD_FORMAT;
3808 is_before = true;
3809 type = uval;
3810 break;
3811
3812 case RESERV:
3813 tmask = (DTK_DATE_M | DTK_TIME_M);
3814
3815 /*
3816 * Only reserved words corresponding to infinite
3817 * intervals are accepted.
3818 */
3819 if (uval != DTK_LATE && uval != DTK_EARLY)
3820 return DTERR_BAD_FORMAT;
3821
3822 /*
3823 * Infinity cannot be followed by anything else. We
3824 * could allow "ago" to reverse the sign of infinity
3825 * but using signed infinity is more intuitive.
3826 */
3827 if (i != nf - 1)
3828 return DTERR_BAD_FORMAT;
3829
3830 *dtype = uval;
3831 break;
3832
3833 default:
3834 return DTERR_BAD_FORMAT;
3835 }
3836 break;
3837
3838 default:
3839 return DTERR_BAD_FORMAT;
3840 }
3841
3842 if (tmask & fmask)
3843 return DTERR_BAD_FORMAT;
3844 fmask |= tmask;
3845 }
3846
3847 /* ensure that at least one time field has been found */
3848 if (fmask == 0)
3849 return DTERR_BAD_FORMAT;
3850
3851 /* reject if unit appeared and was never handled */
3852 if (parsing_unit_val)
3853 return DTERR_BAD_FORMAT;
3854
3855 /* finally, AGO negates everything */
3856 if (is_before)
3857 {
3858 if (itm_in->tm_usec == PG_INT64_MIN ||
3859 itm_in->tm_mday == INT_MIN ||
3860 itm_in->tm_mon == INT_MIN ||
3861 itm_in->tm_year == INT_MIN)
3862 return DTERR_FIELD_OVERFLOW;
3863
3864 itm_in->tm_usec = -itm_in->tm_usec;
3865 itm_in->tm_mday = -itm_in->tm_mday;
3866 itm_in->tm_mon = -itm_in->tm_mon;
3867 itm_in->tm_year = -itm_in->tm_year;
3868 }
3869
3870 return 0;
3871}
DecodeUnits
int DecodeUnits(int field, const char *lowtoken, int *val)
Definition: datetime.c:4169
AdjustDays
static bool AdjustDays(int64 val, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:643
AdjustFractYears
static bool AdjustFractYears(double frac, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:611
AdjustMicroseconds
static bool AdjustMicroseconds(int64 val, double fval, int64 scale, struct pg_itm_in *itm_in)
Definition: datetime.c:628
DecodeTimeForInterval
static int DecodeTimeForInterval(char *str, int fmask, int range, int *tmask, struct pg_itm_in *itm_in)
Definition: datetime.c:2754
AdjustFractMicroseconds
static bool AdjustFractMicroseconds(double frac, int64 scale, struct pg_itm_in *itm_in)
Definition: datetime.c:547
AdjustYears
static bool AdjustYears(int64 val, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:671
AdjustMonths
static bool AdjustMonths(int64 val, struct pg_itm_in *itm_in)
Definition: datetime.c:659
AdjustFractDays
static bool AdjustFractDays(double frac, int scale, struct pg_itm_in *itm_in)
Definition: datetime.c:579
ClearPgItmIn
static void ClearPgItmIn(struct pg_itm_in *itm_in)
Definition: datetime.c:3462
PG_INT64_MIN
#define PG_INT64_MIN
Definition: c.h:597
USECS_PER_HOUR
#define USECS_PER_HOUR
Definition: timestamp.h:132
MONTHS_PER_YEAR
#define MONTHS_PER_YEAR
Definition: timestamp.h:108
USECS_PER_SEC
#define USECS_PER_SEC
Definition: timestamp.h:134
USECS_PER_MINUTE
#define USECS_PER_MINUTE
Definition: timestamp.h:133
DAYS_PER_MONTH
#define DAYS_PER_MONTH
Definition: timestamp.h:116
IntervalStyle
int IntervalStyle
Definition: globals.c:127
MILLENNIUM
#define MILLENNIUM
Definition: datetime.h:120
DTK_DECADE
#define DTK_DECADE
Definition: datetime.h:168
DTK_SECOND
#define DTK_SECOND
Definition: datetime.h:160
DTK_DELTA
#define DTK_DELTA
Definition: datetime.h:159
MICROSECOND
#define MICROSECOND
Definition: datetime.h:104
HOUR
#define HOUR
Definition: datetime.h:100
WEEK
#define WEEK
Definition: datetime.h:117
DECADE
#define DECADE
Definition: datetime.h:118
YEAR
#define YEAR
Definition: datetime.h:92
DTK_CENTURY
#define DTK_CENTURY
Definition: datetime.h:169
MILLISECOND
#define MILLISECOND
Definition: datetime.h:103
DTK_DAY
#define DTK_DAY
Definition: datetime.h:163
CENTURY
#define CENTURY
Definition: datetime.h:119
DTK_MILLENNIUM
#define DTK_MILLENNIUM
Definition: datetime.h:170
SECOND
#define SECOND
Definition: datetime.h:102
DTK_ALL_SECS_M
#define DTK_ALL_SECS_M
Definition: datetime.h:190
DTK_HOUR
#define DTK_HOUR
Definition: datetime.h:162
DTK_WEEK
#define DTK_WEEK
Definition: datetime.h:164
MINUTE
#define MINUTE
Definition: datetime.h:101
DTK_MICROSEC
#define DTK_MICROSEC
Definition: datetime.h:172
DTK_YEAR
#define DTK_YEAR
Definition: datetime.h:167
AGO
#define AGO
Definition: datetime.h:110
DTK_MILLISEC
#define DTK_MILLISEC
Definition: datetime.h:171
DTK_MONTH
#define DTK_MONTH
Definition: datetime.h:165
DTK_MINUTE
#define DTK_MINUTE
Definition: datetime.h:161
pg_mul_s64_overflow
static bool pg_mul_s64_overflow(int64 a, int64 b, int64 *result)
Definition: int.h:293
pg_add_s64_overflow
static bool pg_add_s64_overflow(int64 a, int64 b, int64 *result)
Definition: int.h:235
INTSTYLE_SQL_STANDARD
#define INTSTYLE_SQL_STANDARD
Definition: miscadmin.h:258
range
static struct cvec * range(struct vars *v, chr a, chr b, int cases)
Definition: regc_locale.c:412
pg_itm_in::tm_mon
int tm_mon
Definition: timestamp.h:86
pg_itm_in::tm_year
int tm_year
Definition: timestamp.h:87
pg_itm_in::tm_mday
int tm_mday
Definition: timestamp.h:85
pg_itm_in::tm_usec
int64 tm_usec
Definition: timestamp.h:84
INTERVAL_MASK
#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, 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 3951 of file datetime.c.

3953{
3954 bool datepart = true;
3955 bool havefield = false;
3956
3957 *dtype = DTK_DELTA;
3958 ClearPgItmIn(itm_in);
3959
3960 if (strlen(str) < 2 || str[0] != 'P')
3961 return DTERR_BAD_FORMAT;
3962
3963 str++;
3964 while (*str)
3965 {
3966 char *fieldstart;
3967 int64 val;
3968 double fval;
3969 char unit;
3970 int dterr;
3971
3972 if (*str == 'T') /* T indicates the beginning of the time part */
3973 {
3974 datepart = false;
3975 havefield = false;
3976 str++;
3977 continue;
3978 }
3979
3980 fieldstart = str;
3981 dterr = ParseISO8601Number(str, &str, &val, &fval);
3982 if (dterr)
3983 return dterr;
3984
3985 /*
3986 * Note: we could step off the end of the string here. Code below
3987 * *must* exit the loop if unit == '\0'.
3988 */
3989 unit = *str++;
3990
3991 if (datepart)
3992 {
3993 switch (unit) /* before T: Y M W D */
3994 {
3995 case 'Y':
3996 if (!AdjustYears(val, 1, itm_in) ||
3997 !AdjustFractYears(fval, 1, itm_in))
3998 return DTERR_FIELD_OVERFLOW;
3999 break;
4000 case 'M':
4001 if (!AdjustMonths(val, itm_in) ||
4002 !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
4003 return DTERR_FIELD_OVERFLOW;
4004 break;
4005 case 'W':
4006 if (!AdjustDays(val, 7, itm_in) ||
4007 !AdjustFractDays(fval, 7, itm_in))
4008 return DTERR_FIELD_OVERFLOW;
4009 break;
4010 case 'D':
4011 if (!AdjustDays(val, 1, itm_in) ||
4012 !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
4013 return DTERR_FIELD_OVERFLOW;
4014 break;
4015 case 'T': /* ISO 8601 4.4.3.3 Alternative Format / Basic */
4016 case '\0':
4017 if (ISO8601IntegerWidth(fieldstart) == 8 && !havefield)
4018 {
4019 if (!AdjustYears(val / 10000, 1, itm_in) ||
4020 !AdjustMonths((val / 100) % 100, itm_in) ||
4021 !AdjustDays(val % 100, 1, itm_in) ||
4022 !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
4023 return DTERR_FIELD_OVERFLOW;
4024 if (unit == '\0')
4025 return 0;
4026 datepart = false;
4027 havefield = false;
4028 continue;
4029 }
4030 /* Else fall through to extended alternative format */
4031 /* FALLTHROUGH */
4032 case '-': /* ISO 8601 4.4.3.3 Alternative Format,
4033 * Extended */
4034 if (havefield)
4035 return DTERR_BAD_FORMAT;
4036
4037 if (!AdjustYears(val, 1, itm_in) ||
4038 !AdjustFractYears(fval, 1, itm_in))
4039 return DTERR_FIELD_OVERFLOW;
4040 if (unit == '\0')
4041 return 0;
4042 if (unit == 'T')
4043 {
4044 datepart = false;
4045 havefield = false;
4046 continue;
4047 }
4048
4049 dterr = ParseISO8601Number(str, &str, &val, &fval);
4050 if (dterr)
4051 return dterr;
4052 if (!AdjustMonths(val, itm_in) ||
4053 !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
4054 return DTERR_FIELD_OVERFLOW;
4055 if (*str == '\0')
4056 return 0;
4057 if (*str == 'T')
4058 {
4059 datepart = false;
4060 havefield = false;
4061 continue;
4062 }
4063 if (*str != '-')
4064 return DTERR_BAD_FORMAT;
4065 str++;
4066
4067 dterr = ParseISO8601Number(str, &str, &val, &fval);
4068 if (dterr)
4069 return dterr;
4070 if (!AdjustDays(val, 1, itm_in) ||
4071 !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
4072 return DTERR_FIELD_OVERFLOW;
4073 if (*str == '\0')
4074 return 0;
4075 if (*str == 'T')
4076 {
4077 datepart = false;
4078 havefield = false;
4079 continue;
4080 }
4081 return DTERR_BAD_FORMAT;
4082 default:
4083 /* not a valid date unit suffix */
4084 return DTERR_BAD_FORMAT;
4085 }
4086 }
4087 else
4088 {
4089 switch (unit) /* after T: H M S */
4090 {
4091 case 'H':
4092 if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
4093 return DTERR_FIELD_OVERFLOW;
4094 break;
4095 case 'M':
4096 if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
4097 return DTERR_FIELD_OVERFLOW;
4098 break;
4099 case 'S':
4100 if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
4101 return DTERR_FIELD_OVERFLOW;
4102 break;
4103 case '\0': /* ISO 8601 4.4.3.3 Alternative Format */
4104 if (ISO8601IntegerWidth(fieldstart) == 6 && !havefield)
4105 {
4106 if (!AdjustMicroseconds(val / 10000, 0, USECS_PER_HOUR, itm_in) ||
4107 !AdjustMicroseconds((val / 100) % 100, 0, USECS_PER_MINUTE, itm_in) ||
4108 !AdjustMicroseconds(val % 100, 0, USECS_PER_SEC, itm_in) ||
4109 !AdjustFractMicroseconds(fval, 1, itm_in))
4110 return DTERR_FIELD_OVERFLOW;
4111 return 0;
4112 }
4113 /* Else fall through to extended alternative format */
4114 /* FALLTHROUGH */
4115 case ':': /* ISO 8601 4.4.3.3 Alternative Format,
4116 * Extended */
4117 if (havefield)
4118 return DTERR_BAD_FORMAT;
4119
4120 if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
4121 return DTERR_FIELD_OVERFLOW;
4122 if (unit == '\0')
4123 return 0;
4124
4125 dterr = ParseISO8601Number(str, &str, &val, &fval);
4126 if (dterr)
4127 return dterr;
4128 if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
4129 return DTERR_FIELD_OVERFLOW;
4130 if (*str == '\0')
4131 return 0;
4132 if (*str != ':')
4133 return DTERR_BAD_FORMAT;
4134 str++;
4135
4136 dterr = ParseISO8601Number(str, &str, &val, &fval);
4137 if (dterr)
4138 return dterr;
4139 if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
4140 return DTERR_FIELD_OVERFLOW;
4141 if (*str == '\0')
4142 return 0;
4143 return DTERR_BAD_FORMAT;
4144
4145 default:
4146 /* not a valid time unit suffix */
4147 return DTERR_BAD_FORMAT;
4148 }
4149 }
4150
4151 havefield = true;
4152 }
4153
4154 return 0;
4155}
ISO8601IntegerWidth
static int ISO8601IntegerWidth(char *fieldstart)
Definition: datetime.c:3924
ParseISO8601Number
static int ParseISO8601Number(char *str, char **endptr, int64 *ipart, double *fpart)
Definition: datetime.c:3882

References AdjustDays(), AdjustFractDays(), AdjustFractMicroseconds(), AdjustFractYears(), AdjustMicroseconds(), AdjustMonths(), AdjustYears(), ClearPgItmIn(), DAYS_PER_MONTH, DTERR_BAD_FORMAT, DTERR_FIELD_OVERFLOW, DTK_DELTA, ISO8601IntegerWidth(), ParseISO8601Number(), 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 3246 of file datetime.c.

3247{
3248 int type;
3249 const datetkn *tp;
3250
3251 tp = datecache[field];
3252 /* use strncmp so that we match truncated tokens */
3253 if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
3254 {
3255 tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
3256 }
3257 if (tp == NULL)
3258 {
3259 type = UNKNOWN_FIELD;
3260 *val = 0;
3261 }
3262 else
3263 {
3264 datecache[field] = tp;
3265 type = tp->type;
3266 *val = tp->value;
3267 }
3268
3269 return type;
3270}
datecache
static const datetkn * datecache[MAXDATEFIELDS]
Definition: datetime.c:258
datebsearch
static const datetkn * datebsearch(const char *key, const datetkn *base, int nel)
Definition: datetime.c:4275

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 1917 of file datetime.c.

1920{
1921 int fmask = 0,
1922 tmask,
1923 type;
1924 int ptype = 0; /* "prefix type" for ISO and Julian formats */
1925 int i;
1926 int val;
1927 int dterr;
1928 bool isjulian = false;
1929 bool is2digits = false;
1930 bool bc = false;
1931 int mer = HR24;
1932 pg_tz *namedTz = NULL;
1933 pg_tz *abbrevTz = NULL;
1934 char *abbrev = NULL;
1935 pg_tz *valtz;
1936
1937 *dtype = DTK_TIME;
1938 tm->tm_hour = 0;
1939 tm->tm_min = 0;
1940 tm->tm_sec = 0;
1941 *fsec = 0;
1942 /* don't know daylight savings time status apriori */
1943 tm->tm_isdst = -1;
1944
1945 if (tzp != NULL)
1946 *tzp = 0;
1947
1948 for (i = 0; i < nf; i++)
1949 {
1950 switch (ftype[i])
1951 {
1952 case DTK_DATE:
1953
1954 /*
1955 * Time zone not allowed? Then should not accept dates or time
1956 * zones no matter what else!
1957 */
1958 if (tzp == NULL)
1959 return DTERR_BAD_FORMAT;
1960
1961 /* Under limited circumstances, we will accept a date... */
1962 if (i == 0 && nf >= 2 &&
1963 (ftype[nf - 1] == DTK_DATE || ftype[1] == DTK_TIME))
1964 {
1965 dterr = DecodeDate(field[i], fmask,
1966 &tmask, &is2digits, tm);
1967 if (dterr)
1968 return dterr;
1969 }
1970 /* otherwise, this is a time and/or time zone */
1971 else
1972 {
1973 if (isdigit((unsigned char) *field[i]))
1974 {
1975 char *cp;
1976
1977 /*
1978 * Starts with a digit but we already have a time
1979 * field? Then we are in trouble with time already...
1980 */
1981 if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1982 return DTERR_BAD_FORMAT;
1983
1984 /*
1985 * Should not get here and fail. Sanity check only...
1986 */
1987 if ((cp = strchr(field[i], '-')) == NULL)
1988 return DTERR_BAD_FORMAT;
1989
1990 /* Get the time zone from the end of the string */
1991 dterr = DecodeTimezone(cp, tzp);
1992 if (dterr)
1993 return dterr;
1994 *cp = '\0';
1995
1996 /*
1997 * Then read the rest of the field as a concatenated
1998 * time
1999 */
2000 dterr = DecodeNumberField(strlen(field[i]), field[i],
2001 (fmask | DTK_DATE_M),
2002 &tmask, tm,
2003 fsec, &is2digits);
2004 if (dterr < 0)
2005 return dterr;
2006 ftype[i] = dterr;
2007
2008 tmask |= DTK_M(TZ);
2009 }
2010 else
2011 {
2012 namedTz = pg_tzset(field[i]);
2013 if (!namedTz)
2014 {
2015 extra->dtee_timezone = field[i];
2016 return DTERR_BAD_TIMEZONE;
2017 }
2018 /* we'll apply the zone setting below */
2019 ftype[i] = DTK_TZ;
2020 tmask = DTK_M(TZ);
2021 }
2022 }
2023 break;
2024
2025 case DTK_TIME:
2026
2027 /*
2028 * This might be an ISO time following a "t" field.
2029 */
2030 if (ptype != 0)
2031 {
2032 if (ptype != DTK_TIME)
2033 return DTERR_BAD_FORMAT;
2034 ptype = 0;
2035 }
2036
2037 dterr = DecodeTime(field[i], (fmask | DTK_DATE_M),
2038 INTERVAL_FULL_RANGE,
2039 &tmask, tm, fsec);
2040 if (dterr)
2041 return dterr;
2042 break;
2043
2044 case DTK_TZ:
2045 {
2046 int tz;
2047
2048 if (tzp == NULL)
2049 return DTERR_BAD_FORMAT;
2050
2051 dterr = DecodeTimezone(field[i], &tz);
2052 if (dterr)
2053 return dterr;
2054 *tzp = tz;
2055 tmask = DTK_M(TZ);
2056 }
2057 break;
2058
2059 case DTK_NUMBER:
2060
2061 /*
2062 * Deal with cases where previous field labeled this one
2063 */
2064 if (ptype != 0)
2065 {
2066 char *cp;
2067 int value;
2068
2069 errno = 0;
2070 value = strtoint(field[i], &cp, 10);
2071 if (errno == ERANGE)
2072 return DTERR_FIELD_OVERFLOW;
2073 if (*cp != '.' && *cp != '\0')
2074 return DTERR_BAD_FORMAT;
2075
2076 switch (ptype)
2077 {
2078 case DTK_JULIAN:
2079 /* previous field was a label for "julian date" */
2080 if (tzp == NULL)
2081 return DTERR_BAD_FORMAT;
2082 if (value < 0)
2083 return DTERR_FIELD_OVERFLOW;
2084 tmask = DTK_DATE_M;
2085 j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2086 isjulian = true;
2087
2088 if (*cp == '.')
2089 {
2090 double time;
2091
2092 dterr = ParseFraction(cp, &time);
2093 if (dterr)
2094 return dterr;
2095 time *= USECS_PER_DAY;
2096 dt2time(time,
2097 &tm->tm_hour, &tm->tm_min,
2098 &tm->tm_sec, fsec);
2099 tmask |= DTK_TIME_M;
2100 }
2101 break;
2102
2103 case DTK_TIME:
2104 /* previous field was "t" for ISO time */
2105 dterr = DecodeNumberField(strlen(field[i]), field[i],
2106 (fmask | DTK_DATE_M),
2107 &tmask, tm,
2108 fsec, &is2digits);
2109 if (dterr < 0)
2110 return dterr;
2111 ftype[i] = dterr;
2112
2113 if (tmask != DTK_TIME_M)
2114 return DTERR_BAD_FORMAT;
2115 break;
2116
2117 default:
2118 return DTERR_BAD_FORMAT;
2119 break;
2120 }
2121
2122 ptype = 0;
2123 *dtype = DTK_DATE;
2124 }
2125 else
2126 {
2127 char *cp;
2128 int flen;
2129
2130 flen = strlen(field[i]);
2131 cp = strchr(field[i], '.');
2132
2133 /* Embedded decimal? */
2134 if (cp != NULL)
2135 {
2136 /*
2137 * Under limited circumstances, we will accept a
2138 * date...
2139 */
2140 if (i == 0 && nf >= 2 && ftype[nf - 1] == DTK_DATE)
2141 {
2142 dterr = DecodeDate(field[i], fmask,
2143 &tmask, &is2digits, tm);
2144 if (dterr)
2145 return dterr;
2146 }
2147 /* embedded decimal and several digits before? */
2148 else if (flen - strlen(cp) > 2)
2149 {
2150 /*
2151 * Interpret as a concatenated date or time Set
2152 * the type field to allow decoding other fields
2153 * later. Example: 20011223 or 040506
2154 */
2155 dterr = DecodeNumberField(flen, field[i],
2156 (fmask | DTK_DATE_M),
2157 &tmask, tm,
2158 fsec, &is2digits);
2159 if (dterr < 0)
2160 return dterr;
2161 ftype[i] = dterr;
2162 }
2163 else
2164 return DTERR_BAD_FORMAT;
2165 }
2166 else if (flen > 4)
2167 {
2168 dterr = DecodeNumberField(flen, field[i],
2169 (fmask | DTK_DATE_M),
2170 &tmask, tm,
2171 fsec, &is2digits);
2172 if (dterr < 0)
2173 return dterr;
2174 ftype[i] = dterr;
2175 }
2176 /* otherwise it is a single date/time field... */
2177 else
2178 {
2179 dterr = DecodeNumber(flen, field[i],
2180 false,
2181 (fmask | DTK_DATE_M),
2182 &tmask, tm,
2183 fsec, &is2digits);
2184 if (dterr)
2185 return dterr;
2186 }
2187 }
2188 break;
2189
2190 case DTK_STRING:
2191 case DTK_SPECIAL:
2192 /* timezone abbrevs take precedence over built-in tokens */
2193 dterr = DecodeTimezoneAbbrev(i, field[i],
2194 &type, &val, &valtz, extra);
2195 if (dterr)
2196 return dterr;
2197 if (type == UNKNOWN_FIELD)
2198 type = DecodeSpecial(i, field[i], &val);
2199 if (type == IGNORE_DTF)
2200 continue;
2201
2202 tmask = DTK_M(type);
2203 switch (type)
2204 {
2205 case RESERV:
2206 switch (val)
2207 {
2208 case DTK_NOW:
2209 tmask = DTK_TIME_M;
2210 *dtype = DTK_TIME;
2211 GetCurrentTimeUsec(tm, fsec, NULL);
2212 break;
2213
2214 case DTK_ZULU:
2215 tmask = (DTK_TIME_M | DTK_M(TZ));
2216 *dtype = DTK_TIME;
2217 tm->tm_hour = 0;
2218 tm->tm_min = 0;
2219 tm->tm_sec = 0;
2220 tm->tm_isdst = 0;
2221 break;
2222
2223 default:
2224 return DTERR_BAD_FORMAT;
2225 }
2226
2227 break;
2228
2229 case DTZMOD:
2230
2231 /*
2232 * daylight savings time modifier (solves "MET DST"
2233 * syntax)
2234 */
2235 tmask |= DTK_M(DTZ);
2236 tm->tm_isdst = 1;
2237 if (tzp == NULL)
2238 return DTERR_BAD_FORMAT;
2239 *tzp -= val;
2240 break;
2241
2242 case DTZ:
2243
2244 /*
2245 * set mask for TZ here _or_ check for DTZ later when
2246 * getting default timezone
2247 */
2248 tmask |= DTK_M(TZ);
2249 tm->tm_isdst = 1;
2250 if (tzp == NULL)
2251 return DTERR_BAD_FORMAT;
2252 *tzp = -val;
2253 ftype[i] = DTK_TZ;
2254 break;
2255
2256 case TZ:
2257 tm->tm_isdst = 0;
2258 if (tzp == NULL)
2259 return DTERR_BAD_FORMAT;
2260 *tzp = -val;
2261 ftype[i] = DTK_TZ;
2262 break;
2263
2264 case DYNTZ:
2265 tmask |= DTK_M(TZ);
2266 if (tzp == NULL)
2267 return DTERR_BAD_FORMAT;
2268 /* we'll determine the actual offset later */
2269 abbrevTz = valtz;
2270 abbrev = field[i];
2271 ftype[i] = DTK_TZ;
2272 break;
2273
2274 case AMPM:
2275 mer = val;
2276 break;
2277
2278 case ADBC:
2279 bc = (val == BC);
2280 break;
2281
2282 case UNITS:
2283 tmask = 0;
2284 /* reject consecutive unhandled units */
2285 if (ptype != 0)
2286 return DTERR_BAD_FORMAT;
2287 ptype = val;
2288 break;
2289
2290 case ISOTIME:
2291 tmask = 0;
2292 /* reject consecutive unhandled units */
2293 if (ptype != 0)
2294 return DTERR_BAD_FORMAT;
2295 ptype = val;
2296 break;
2297
2298 case UNKNOWN_FIELD:
2299
2300 /*
2301 * Before giving up and declaring error, check to see
2302 * if it is an all-alpha timezone name.
2303 */
2304 namedTz = pg_tzset(field[i]);
2305 if (!namedTz)
2306 return DTERR_BAD_FORMAT;
2307 /* we'll apply the zone setting below */
2308 tmask = DTK_M(TZ);
2309 break;
2310
2311 default:
2312 return DTERR_BAD_FORMAT;
2313 }
2314 break;
2315
2316 default:
2317 return DTERR_BAD_FORMAT;
2318 }
2319
2320 if (tmask & fmask)
2321 return DTERR_BAD_FORMAT;
2322 fmask |= tmask;
2323 } /* end loop over fields */
2324
2325 /* reject if prefix type appeared and was never handled */
2326 if (ptype != 0)
2327 return DTERR_BAD_FORMAT;
2328
2329 /* do final checking/adjustment of Y/M/D fields */
2330 dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
2331 if (dterr)
2332 return dterr;
2333
2334 /* handle AM/PM */
2335 if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
2336 return DTERR_FIELD_OVERFLOW;
2337 if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
2338 tm->tm_hour = 0;
2339 else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
2340 tm->tm_hour += HOURS_PER_DAY / 2;
2341
2342 /* check for time overflow */
2343 if (time_overflows(tm->tm_hour, tm->tm_min, tm->tm_sec, *fsec))
2344 return DTERR_FIELD_OVERFLOW;
2345
2346 if ((fmask & DTK_TIME_M) != DTK_TIME_M)
2347 return DTERR_BAD_FORMAT;
2348
2349 /*
2350 * If we had a full timezone spec, compute the offset (we could not do it
2351 * before, because we may need the date to resolve DST status).
2352 */
2353 if (namedTz != NULL)
2354 {
2355 long int gmtoff;
2356
2357 /* daylight savings time modifier disallowed with full TZ */
2358 if (fmask & DTK_M(DTZMOD))
2359 return DTERR_BAD_FORMAT;
2360
2361 /* if non-DST zone, we do not need to know the date */
2362 if (pg_get_timezone_offset(namedTz, &gmtoff))
2363 {
2364 *tzp = -(int) gmtoff;
2365 }
2366 else
2367 {
2368 /* a date has to be specified */
2369 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2370 return DTERR_BAD_FORMAT;
2371 *tzp = DetermineTimeZoneOffset(tm, namedTz);
2372 }
2373 }
2374
2375 /*
2376 * Likewise, if we had a dynamic timezone abbreviation, resolve it now.
2377 */
2378 if (abbrevTz != NULL)
2379 {
2380 struct pg_tm tt,
2381 *tmp = &tt;
2382
2383 /*
2384 * daylight savings time modifier but no standard timezone? then error
2385 */
2386 if (fmask & DTK_M(DTZMOD))
2387 return DTERR_BAD_FORMAT;
2388
2389 if ((fmask & DTK_DATE_M) == 0)
2390 GetCurrentDateTime(tmp);
2391 else
2392 {
2393 /* a date has to be specified */
2394 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2395 return DTERR_BAD_FORMAT;
2396 tmp->tm_year = tm->tm_year;
2397 tmp->tm_mon = tm->tm_mon;
2398 tmp->tm_mday = tm->tm_mday;
2399 }
2400 tmp->tm_hour = tm->tm_hour;
2401 tmp->tm_min = tm->tm_min;
2402 tmp->tm_sec = tm->tm_sec;
2403 *tzp = DetermineTimeZoneAbbrevOffset(tmp, abbrev, abbrevTz);
2404 tm->tm_isdst = tmp->tm_isdst;
2405 }
2406
2407 /* timezone not specified? then use session timezone */
2408 if (tzp != NULL && !(fmask & DTK_M(TZ)))
2409 {
2410 struct pg_tm tt,
2411 *tmp = &tt;
2412
2413 /*
2414 * daylight savings time modifier but no standard timezone? then error
2415 */
2416 if (fmask & DTK_M(DTZMOD))
2417 return DTERR_BAD_FORMAT;
2418
2419 if ((fmask & DTK_DATE_M) == 0)
2420 GetCurrentDateTime(tmp);
2421 else
2422 {
2423 /* a date has to be specified */
2424 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2425 return DTERR_BAD_FORMAT;
2426 tmp->tm_year = tm->tm_year;
2427 tmp->tm_mon = tm->tm_mon;
2428 tmp->tm_mday = tm->tm_mday;
2429 }
2430 tmp->tm_hour = tm->tm_hour;
2431 tmp->tm_min = tm->tm_min;
2432 tmp->tm_sec = tm->tm_sec;
2433 *tzp = DetermineTimeZoneOffset(tmp, session_timezone);
2434 tm->tm_isdst = tmp->tm_isdst;
2435 }
2436
2437 return 0;
2438}
pg_get_timezone_offset
bool pg_get_timezone_offset(const pg_tz *tz, long int *gmtoff)
Definition: localtime.c:1965

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 3057 of file datetime.c.

3058{
3059 int tz;
3060 int hr,
3061 min,
3062 sec = 0;
3063 char *cp;
3064
3065 /* leading character must be "+" or "-" */
3066 if (*str != '+' && *str != '-')
3067 return DTERR_BAD_FORMAT;
3068
3069 errno = 0;
3070 hr = strtoint(str + 1, &cp, 10);
3071 if (errno == ERANGE)
3072 return DTERR_TZDISP_OVERFLOW;
3073
3074 /* explicit delimiter? */
3075 if (*cp == ':')
3076 {
3077 errno = 0;
3078 min = strtoint(cp + 1, &cp, 10);
3079 if (errno == ERANGE)
3080 return DTERR_TZDISP_OVERFLOW;
3081 if (*cp == ':')
3082 {
3083 errno = 0;
3084 sec = strtoint(cp + 1, &cp, 10);
3085 if (errno == ERANGE)
3086 return DTERR_TZDISP_OVERFLOW;
3087 }
3088 }
3089 /* otherwise, might have run things together... */
3090 else if (*cp == '\0' && strlen(str) > 3)
3091 {
3092 min = hr % 100;
3093 hr = hr / 100;
3094 /* we could, but don't, support a run-together hhmmss format */
3095 }
3096 else
3097 min = 0;
3098
3099 /* Range-check the values; see notes in datatype/timestamp.h */
3100 if (hr < 0 || hr > MAX_TZDISP_HOUR)
3101 return DTERR_TZDISP_OVERFLOW;
3102 if (min < 0 || min >= MINS_PER_HOUR)
3103 return DTERR_TZDISP_OVERFLOW;
3104 if (sec < 0 || sec >= SECS_PER_MINUTE)
3105 return DTERR_TZDISP_OVERFLOW;
3106
3107 tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE + sec;
3108 if (*str == '-')
3109 tz = -tz;
3110
3111 *tzp = -tz;
3112
3113 if (*cp != '\0')
3114 return DTERR_BAD_FORMAT;
3115
3116 return 0;
3117}
MAX_TZDISP_HOUR
#define MAX_TZDISP_HOUR
Definition: timestamp.h:143
MINS_PER_HOUR
#define MINS_PER_HOUR
Definition: timestamp.h:129
SECS_PER_MINUTE
#define SECS_PER_MINUTE
Definition: timestamp.h:128

References DTERR_BAD_FORMAT, DTERR_TZDISP_OVERFLOW, MAX_TZDISP_HOUR, MINS_PER_HOUR, SECS_PER_MINUTE, 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 3141 of file datetime.c.

3144{
3145 TzAbbrevCache *tzc = &tzabbrevcache[field];
3146 bool isfixed;
3147 int isdst;
3148 const datetkn *tp;
3149
3150 /*
3151 * Do we have a cached result? Use strncmp so that we match truncated
3152 * names, although we shouldn't really see that happen with normal
3153 * abbreviations.
3154 */
3155 if (strncmp(lowtoken, tzc->abbrev, TOKMAXLEN) == 0)
3156 {
3157 *ftype = tzc->ftype;
3158 *offset = tzc->offset;
3159 *tz = tzc->tz;
3160 return 0;
3161 }
3162
3163 /*
3164 * See if the current session_timezone recognizes it. Checking this
3165 * before zoneabbrevtbl allows us to correctly handle abbreviations whose
3166 * meaning varies across zones, such as "LMT".
3167 */
3168 if (session_timezone &&
3169 TimeZoneAbbrevIsKnown(lowtoken, session_timezone,
3170 &isfixed, offset, &isdst))
3171 {
3172 *ftype = (isfixed ? (isdst ? DTZ : TZ) : DYNTZ);
3173 *tz = (isfixed ? NULL : session_timezone);
3174 /* flip sign to agree with the convention used in zoneabbrevtbl */
3175 *offset = -(*offset);
3176 /* cache result; use strlcpy to truncate name if necessary */
3177 strlcpy(tzc->abbrev, lowtoken, TOKMAXLEN + 1);
3178 tzc->ftype = *ftype;
3179 tzc->offset = *offset;
3180 tzc->tz = *tz;
3181 return 0;
3182 }
3183
3184 /* Nope, so look in zoneabbrevtbl */
3185 if (zoneabbrevtbl)
3186 tp = datebsearch(lowtoken, zoneabbrevtbl->abbrevs,
3187 zoneabbrevtbl->numabbrevs);
3188 else
3189 tp = NULL;
3190 if (tp == NULL)
3191 {
3192 *ftype = UNKNOWN_FIELD;
3193 *offset = 0;
3194 *tz = NULL;
3195 /* failure results are not cached */
3196 }
3197 else
3198 {
3199 *ftype = tp->type;
3200 if (tp->type == DYNTZ)
3201 {
3202 *offset = 0;
3203 *tz = FetchDynamicTimeZone(zoneabbrevtbl, tp, extra);
3204 if (*tz == NULL)
3205 return DTERR_BAD_ZONE_ABBREV;
3206 }
3207 else
3208 {
3209 *offset = tp->value;
3210 *tz = NULL;
3211 }
3212
3213 /* cache result; use strlcpy to truncate name if necessary */
3214 strlcpy(tzc->abbrev, lowtoken, TOKMAXLEN + 1);
3215 tzc->ftype = *ftype;
3216 tzc->offset = *offset;
3217 tzc->tz = *tz;
3218 }
3219
3220 return 0;
3221}
zoneabbrevtbl
static TimeZoneAbbrevTable * zoneabbrevtbl
Definition: datetime.c:254
TimeZoneAbbrevIsKnown
static bool TimeZoneAbbrevIsKnown(const char *abbr, pg_tz *tzp, bool *isfixed, int *offset, int *isdst)
Definition: datetime.c:1874
FetchDynamicTimeZone
static pg_tz * FetchDynamicTimeZone(TimeZoneAbbrevTable *tbl, const datetkn *tp, DateTimeErrorExtra *extra)
Definition: datetime.c:5092
TzAbbrevCache::tz
pg_tz * tz
Definition: datetime.c:269
TzAbbrevCache::abbrev
char abbrev[TOKMAXLEN+1]
Definition: datetime.c:266

References TzAbbrevCache::abbrev, TimeZoneAbbrevTable::abbrevs, datebsearch(), DTERR_BAD_ZONE_ABBREV, DTZ, DYNTZ, FetchDynamicTimeZone(), TzAbbrevCache::ftype, TimeZoneAbbrevTable::numabbrevs, TzAbbrevCache::offset, session_timezone, strlcpy(), TimeZoneAbbrevIsKnown(), TOKMAXLEN, datetkn::type, TzAbbrevCache::tz, TZ, tzabbrevcache, 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 3371 of file datetime.c.

3372{
3373 char lowtoken[TOKMAXLEN + 1];
3374 int len;
3375
3376 *offset = 0; /* avoid uninitialized vars on failure */
3377 *tz = NULL;
3378
3379 /* Downcase as much of the string as we could need */
3380 for (len = 0; len < TOKMAXLEN; len++)
3381 {
3382 if (*str == '\0' || !isalpha((unsigned char) *str))
3383 break;
3384 lowtoken[len] = pg_tolower((unsigned char) *str++);
3385 }
3386 lowtoken[len] = '\0';
3387
3388 /*
3389 * We could avoid doing repeated binary searches if we cared to duplicate
3390 * datebsearch here, but it's not clear that such an optimization would be
3391 * worth the trouble. In common cases there's probably not anything after
3392 * the zone abbrev anyway. So just search with successively truncated
3393 * strings.
3394 */
3395 while (len > 0)
3396 {
3397 bool isfixed;
3398 int isdst;
3399 const datetkn *tp;
3400
3401 /* See if the current session_timezone recognizes it. */
3402 if (session_timezone &&
3403 TimeZoneAbbrevIsKnown(lowtoken, session_timezone,
3404 &isfixed, offset, &isdst))
3405 {
3406 if (isfixed)
3407 {
3408 /* flip sign to agree with the convention in zoneabbrevtbl */
3409 *offset = -(*offset);
3410 }
3411 else
3412 {
3413 /* Caller must resolve the abbrev's current meaning */
3414 *tz = session_timezone;
3415 }
3416 return len;
3417 }
3418
3419 /* Known in zoneabbrevtbl? */
3420 if (zoneabbrevtbl)
3421 tp = datebsearch(lowtoken, zoneabbrevtbl->abbrevs,
3422 zoneabbrevtbl->numabbrevs);
3423 else
3424 tp = NULL;
3425 if (tp != NULL)
3426 {
3427 if (tp->type == DYNTZ)
3428 {
3429 DateTimeErrorExtra extra;
3430 pg_tz *tzp = FetchDynamicTimeZone(zoneabbrevtbl, tp,
3431 &extra);
3432
3433 if (tzp != NULL)
3434 {
3435 /* Caller must resolve the abbrev's current meaning */
3436 *tz = tzp;
3437 return len;
3438 }
3439 }
3440 else
3441 {
3442 /* Fixed-offset zone abbrev, so it's easy */
3443 *offset = tp->value;
3444 return len;
3445 }
3446 }
3447
3448 /* Nope, try the next shorter string. */
3449 lowtoken[--len] = '\0';
3450 }
3451
3452 /* Did not find a match */
3453 return -1;
3454}
len
const void size_t len
Definition: pg_crc32c_sse42.c:28
pg_tolower
unsigned char pg_tolower(unsigned char ch)
Definition: pgstrcasecmp.c:122

References TimeZoneAbbrevTable::abbrevs, datebsearch(), DYNTZ, FetchDynamicTimeZone(), len, TimeZoneAbbrevTable::numabbrevs, pg_tolower(), session_timezone, str, TimeZoneAbbrevIsKnown(), 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 3288 of file datetime.c.

3289{
3290 char *lowzone;
3291 int dterr,
3292 type;
3293 DateTimeErrorExtra extra;
3294
3295 /*
3296 * First we look in the timezone abbreviation table (to handle cases like
3297 * "EST"), and if that fails, we look in the timezone database (to handle
3298 * cases like "America/New_York"). This matches the order in which
3299 * timestamp input checks the cases; it's important because the timezone
3300 * database unwisely uses a few zone names that are identical to offset
3301 * abbreviations.
3302 */
3303
3304 /* DecodeTimezoneAbbrev requires lowercase input */
3305 lowzone = downcase_truncate_identifier(tzname,
3306 strlen(tzname),
3307 false);
3308
3309 dterr = DecodeTimezoneAbbrev(0, lowzone, &type, offset, tz, &extra);
3310 if (dterr)
3311 DateTimeParseError(dterr, &extra, NULL, NULL, NULL);
3312
3313 if (type == TZ || type == DTZ)
3314 {
3315 /* fixed-offset abbreviation, return the offset */
3316 return TZNAME_FIXED_OFFSET;
3317 }
3318 else if (type == DYNTZ)
3319 {
3320 /* dynamic-offset abbreviation, return its referenced timezone */
3321 return TZNAME_DYNTZ;
3322 }
3323 else
3324 {
3325 /* try it as a full zone name */
3326 *tz = pg_tzset(tzname);
3327 if (*tz == NULL)
3328 ereport(ERROR,
3329 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3330 errmsg("time zone \"%s\" not recognized", tzname)));
3331 return TZNAME_ZONE;
3332 }
3333}
DateTimeParseError
void DateTimeParseError(int dterr, DateTimeErrorExtra *extra, const char *str, const char *datatype, Node *escontext)
Definition: datetime.c:4214
ereport
#define ereport(elevel,...)
Definition: elog.h:150
TZNAME_ZONE
#define TZNAME_ZONE
Definition: datetime.h:301
TZNAME_FIXED_OFFSET
#define TZNAME_FIXED_OFFSET
Definition: datetime.h:299
TZNAME_DYNTZ
#define TZNAME_DYNTZ
Definition: datetime.h:300
downcase_truncate_identifier
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 3343 of file datetime.c.

3344{
3345 pg_tz *result;
3346 int offset;
3347
3348 if (DecodeTimezoneName(tzname, &offset, &result) == TZNAME_FIXED_OFFSET)
3349 {
3350 /* fixed-offset abbreviation, get a pg_tz descriptor for that */
3351 result = pg_tzset_offset(-offset); /* flip to POSIX sign convention */
3352 }
3353 return result;
3354}
DecodeTimezoneName
int DecodeTimezoneName(const char *tzname, int *offset, pg_tz **tz)
Definition: datetime.c:3288
pg_tzset_offset
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 4169 of file datetime.c.

4170{
4171 int type;
4172 const datetkn *tp;
4173
4174 tp = deltacache[field];
4175 /* use strncmp so that we match truncated tokens */
4176 if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
4177 {
4178 tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
4179 }
4180 if (tp == NULL)
4181 {
4182 type = UNKNOWN_FIELD;
4183 *val = 0;
4184 }
4185 else
4186 {
4187 deltacache[field] = tp;
4188 type = tp->type;
4189 *val = tp->value;
4190 }
4191
4192 return type;
4193} /* DecodeUnits() */
deltacache
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 1765 of file datetime.c.

1766{
1767 pg_time_t t;
1768 int zone_offset;
1769 int abbr_offset;
1770 int abbr_isdst;
1771
1772 /*
1773 * Compute the UTC time we want to probe at. (In event of overflow, we'll
1774 * probe at the epoch, which is a bit random but probably doesn't matter.)
1775 */
1776 zone_offset = DetermineTimeZoneOffsetInternal(tm, tzp, &t);
1777
1778 /*
1779 * Try to match the abbreviation to something in the zone definition.
1780 */
1781 if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1782 &abbr_offset, &abbr_isdst))
1783 {
1784 /* Success, so use the abbrev-specific answers. */
1785 tm->tm_isdst = abbr_isdst;
1786 return abbr_offset;
1787 }
1788
1789 /*
1790 * No match, so use the answers we already got from
1791 * DetermineTimeZoneOffsetInternal.
1792 */
1793 return zone_offset;
1794}
DetermineTimeZoneOffsetInternal
static int DetermineTimeZoneOffsetInternal(struct pg_tm *tm, pg_tz *tzp, pg_time_t *tp)
Definition: datetime.c:1626
DetermineTimeZoneAbbrevOffsetInternal
static bool DetermineTimeZoneAbbrevOffsetInternal(pg_time_t t, const char *abbr, pg_tz *tzp, int *offset, int *isdst)
Definition: datetime.c:1840
pg_time_t
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 1803 of file datetime.c.

1805{
1806 pg_time_t t = timestamptz_to_time_t(ts);
1807 int zone_offset;
1808 int abbr_offset;
1809 int tz;
1810 struct pg_tm tm;
1811 fsec_t fsec;
1812
1813 /*
1814 * If the abbrev matches anything in the zone data, this is pretty easy.
1815 */
1816 if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1817 &abbr_offset, isdst))
1818 return abbr_offset;
1819
1820 /*
1821 * Else, break down the timestamp so we can use DetermineTimeZoneOffset.
1822 */
1823 if (timestamp2tm(ts, &tz, &tm, &fsec, NULL, tzp) != 0)
1824 ereport(ERROR,
1825 (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
1826 errmsg("timestamp out of range")));
1827
1828 zone_offset = DetermineTimeZoneOffset(&tm, tzp);
1829 *isdst = tm.tm_isdst;
1830 return zone_offset;
1831}
timestamp2tm
int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm *tm, fsec_t *fsec, const char **tzn, pg_tz *attimezone)
Definition: timestamp.c:1910
timestamptz_to_time_t
pg_time_t timestamptz_to_time_t(TimestampTz t)
Definition: timestamp.c:1842
fsec_t
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_abbrevs(), timestamptz_zone(), and timetz_zone().

◆ DetermineTimeZoneOffset()

int DetermineTimeZoneOffset ( struct pg_tm *  tm,
pg_tz *  tzp 
)

Definition at line 1604 of file datetime.c.

1605{
1606 pg_time_t t;
1607
1608 return DetermineTimeZoneOffsetInternal(tm, tzp, &t);
1609}

References DetermineTimeZoneOffsetInternal(), and tm.

Referenced by date2timestamptz_opt_overflow(), DecodeDateTime(), DecodeTimeOnly(), DetermineTimeZoneAbbrevOffsetTS(), executeDateTimeMethod(), parse_sane_timezone(), time_timetz(), timestamp2timestamptz_opt_overflow(), timestamp_zone(), timestamptz_pl_interval_internal(), timestamptz_trunc_internal(), and to_timestamp().

◆ EncodeDateOnly()

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

Definition at line 4349 of file datetime.c.

4350{
4351 Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4352
4353 switch (style)
4354 {
4355 case USE_ISO_DATES:
4356 case USE_XSD_DATES:
4357 /* compatible with ISO date formats */
4358 str = pg_ultostr_zeropad(str,
4359 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4360 *str++ = '-';
4361 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4362 *str++ = '-';
4363 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4364 break;
4365
4366 case USE_SQL_DATES:
4367 /* compatible with Oracle/Ingres date formats */
4368 if (DateOrder == DATEORDER_DMY)
4369 {
4370 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4371 *str++ = '/';
4372 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4373 }
4374 else
4375 {
4376 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4377 *str++ = '/';
4378 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4379 }
4380 *str++ = '/';
4381 str = pg_ultostr_zeropad(str,
4382 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4383 break;
4384
4385 case USE_GERMAN_DATES:
4386 /* German-style date format */
4387 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4388 *str++ = '.';
4389 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4390 *str++ = '.';
4391 str = pg_ultostr_zeropad(str,
4392 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4393 break;
4394
4395 case USE_POSTGRES_DATES:
4396 default:
4397 /* traditional date-only style for Postgres */
4398 if (DateOrder == DATEORDER_DMY)
4399 {
4400 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4401 *str++ = '-';
4402 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4403 }
4404 else
4405 {
4406 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4407 *str++ = '-';
4408 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4409 }
4410 *str++ = '-';
4411 str = pg_ultostr_zeropad(str,
4412 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4413 break;
4414 }
4415
4416 if (tm->tm_year <= 0)
4417 {
4418 memcpy(str, " BC", 3); /* Don't copy NUL */
4419 str += 3;
4420 }
4421 *str = '\0';
4422}
DateOrder
int DateOrder
Definition: globals.c:126
USE_SQL_DATES
#define USE_SQL_DATES
Definition: miscadmin.h:237
USE_POSTGRES_DATES
#define USE_POSTGRES_DATES
Definition: miscadmin.h:235
USE_ISO_DATES
#define USE_ISO_DATES
Definition: miscadmin.h:236
DATEORDER_DMY
#define DATEORDER_DMY
Definition: miscadmin.h:243
USE_XSD_DATES
#define USE_XSD_DATES
Definition: miscadmin.h:239
USE_GERMAN_DATES
#define USE_GERMAN_DATES
Definition: miscadmin.h:238
pg_ultostr_zeropad
char * pg_ultostr_zeropad(char *str, uint32 value, int32 minwidth)
Definition: numutils.c:1267

References Assert(), DateOrder, DATEORDER_DMY, MONTHS_PER_YEAR, pg_ultostr_zeropad(), 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 4464 of file datetime.c.

4465{
4466 int day;
4467
4468 Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4469
4470 /*
4471 * Negative tm_isdst means we have no valid time zone translation.
4472 */
4473 if (tm->tm_isdst < 0)
4474 print_tz = false;
4475
4476 switch (style)
4477 {
4478 case USE_ISO_DATES:
4479 case USE_XSD_DATES:
4480 /* Compatible with ISO-8601 date formats */
4481 str = pg_ultostr_zeropad(str,
4482 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4483 *str++ = '-';
4484 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4485 *str++ = '-';
4486 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4487 *str++ = (style == USE_ISO_DATES) ? ' ' : 'T';
4488 str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4489 *str++ = ':';
4490 str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4491 *str++ = ':';
4492 str = AppendTimestampSeconds(str, tm, fsec);
4493 if (print_tz)
4494 str = EncodeTimezone(str, tz, style);
4495 break;
4496
4497 case USE_SQL_DATES:
4498 /* Compatible with Oracle/Ingres date formats */
4499 if (DateOrder == DATEORDER_DMY)
4500 {
4501 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4502 *str++ = '/';
4503 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4504 }
4505 else
4506 {
4507 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4508 *str++ = '/';
4509 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4510 }
4511 *str++ = '/';
4512 str = pg_ultostr_zeropad(str,
4513 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4514 *str++ = ' ';
4515 str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4516 *str++ = ':';
4517 str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4518 *str++ = ':';
4519 str = AppendTimestampSeconds(str, tm, fsec);
4520
4521 /*
4522 * Note: the uses of %.*s in this function would be risky if the
4523 * timezone names ever contain non-ASCII characters, since we are
4524 * not being careful to do encoding-aware clipping. However, all
4525 * TZ abbreviations in the IANA database are plain ASCII.
4526 */
4527 if (print_tz)
4528 {
4529 if (tzn)
4530 {
4531 sprintf(str, " %.*s", MAXTZLEN, tzn);
4532 str += strlen(str);
4533 }
4534 else
4535 str = EncodeTimezone(str, tz, style);
4536 }
4537 break;
4538
4539 case USE_GERMAN_DATES:
4540 /* German variant on European style */
4541 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4542 *str++ = '.';
4543 str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4544 *str++ = '.';
4545 str = pg_ultostr_zeropad(str,
4546 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4547 *str++ = ' ';
4548 str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4549 *str++ = ':';
4550 str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4551 *str++ = ':';
4552 str = AppendTimestampSeconds(str, tm, fsec);
4553
4554 if (print_tz)
4555 {
4556 if (tzn)
4557 {
4558 sprintf(str, " %.*s", MAXTZLEN, tzn);
4559 str += strlen(str);
4560 }
4561 else
4562 str = EncodeTimezone(str, tz, style);
4563 }
4564 break;
4565
4566 case USE_POSTGRES_DATES:
4567 default:
4568 /* Backward-compatible with traditional Postgres abstime dates */
4569 day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
4570 tm->tm_wday = j2day(day);
4571 memcpy(str, days[tm->tm_wday], 3);
4572 str += 3;
4573 *str++ = ' ';
4574 if (DateOrder == DATEORDER_DMY)
4575 {
4576 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4577 *str++ = ' ';
4578 memcpy(str, months[tm->tm_mon - 1], 3);
4579 str += 3;
4580 }
4581 else
4582 {
4583 memcpy(str, months[tm->tm_mon - 1], 3);
4584 str += 3;
4585 *str++ = ' ';
4586 str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4587 }
4588 *str++ = ' ';
4589 str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4590 *str++ = ':';
4591 str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4592 *str++ = ':';
4593 str = AppendTimestampSeconds(str, tm, fsec);
4594 *str++ = ' ';
4595 str = pg_ultostr_zeropad(str,
4596 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4597
4598 if (print_tz)
4599 {
4600 if (tzn)
4601 {
4602 sprintf(str, " %.*s", MAXTZLEN, tzn);
4603 str += strlen(str);
4604 }
4605 else
4606 {
4607 /*
4608 * We have a time zone, but no string version. Use the
4609 * numeric form, but be sure to include a leading space to
4610 * avoid formatting something which would be rejected by
4611 * the date/time parser later. - thomas 2001-10-19
4612 */
4613 *str++ = ' ';
4614 str = EncodeTimezone(str, tz, style);
4615 }
4616 }
4617 break;
4618 }
4619
4620 if (tm->tm_year <= 0)
4621 {
4622 memcpy(str, " BC", 3); /* Don't copy NUL */
4623 str += 3;
4624 }
4625 *str = '\0';
4626}
EncodeTimezone
static char * EncodeTimezone(char *str, int tz, int style)
Definition: datetime.c:4311
j2day
int j2day(int date)
Definition: datetime.c:354
months
const char *const months[]
Definition: datetime.c:81
AppendTimestampSeconds
static char * AppendTimestampSeconds(char *cp, struct pg_tm *tm, fsec_t fsec)
Definition: datetime.c:521
days
const char *const days[]
Definition: datetime.c:84
MAXTZLEN
#define MAXTZLEN
Definition: miscadmin.h:263
sprintf
#define sprintf
Definition: port.h:241

References AppendTimestampSeconds(), Assert(), date2j(), DateOrder, DATEORDER_DMY, days, EncodeTimezone(), j2day(), MAXTZLEN, months, MONTHS_PER_YEAR, pg_ultostr_zeropad(), sprintf, 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 4707 of file datetime.c.

4708{
4709 char *cp = str;
4710 int year = itm->tm_year;
4711 int mon = itm->tm_mon;
4712 int64 mday = itm->tm_mday; /* tm_mday could be INT_MIN */
4713 int64 hour = itm->tm_hour;
4714 int min = itm->tm_min;
4715 int sec = itm->tm_sec;
4716 int fsec = itm->tm_usec;
4717 bool is_before = false;
4718 bool is_zero = true;
4719
4720 /*
4721 * The sign of year and month are guaranteed to match, since they are
4722 * stored internally as "month". But we'll need to check for is_before and
4723 * is_zero when determining the signs of day and hour/minute/seconds
4724 * fields.
4725 */
4726 switch (style)
4727 {
4728 /* SQL Standard interval format */
4729 case INTSTYLE_SQL_STANDARD:
4730 {
4731 bool has_negative = year < 0 || mon < 0 ||
4732 mday < 0 || hour < 0 ||
4733 min < 0 || sec < 0 || fsec < 0;
4734 bool has_positive = year > 0 || mon > 0 ||
4735 mday > 0 || hour > 0 ||
4736 min > 0 || sec > 0 || fsec > 0;
4737 bool has_year_month = year != 0 || mon != 0;
4738 bool has_day_time = mday != 0 || hour != 0 ||
4739 min != 0 || sec != 0 || fsec != 0;
4740 bool has_day = mday != 0;
4741 bool sql_standard_value = !(has_negative && has_positive) &&
4742 !(has_year_month && has_day_time);
4743
4744 /*
4745 * SQL Standard wants only 1 "<sign>" preceding the whole
4746 * interval ... but can't do that if mixed signs.
4747 */
4748 if (has_negative && sql_standard_value)
4749 {
4750 *cp++ = '-';
4751 year = -year;
4752 mon = -mon;
4753 mday = -mday;
4754 hour = -hour;
4755 min = -min;
4756 sec = -sec;
4757 fsec = -fsec;
4758 }
4759
4760 if (!has_negative && !has_positive)
4761 {
4762 sprintf(cp, "0");
4763 }
4764 else if (!sql_standard_value)
4765 {
4766 /*
4767 * For non sql-standard interval values, force outputting
4768 * the signs to avoid ambiguities with intervals with
4769 * mixed sign components.
4770 */
4771 char year_sign = (year < 0 || mon < 0) ? '-' : '+';
4772 char day_sign = (mday < 0) ? '-' : '+';
4773 char sec_sign = (hour < 0 || min < 0 ||
4774 sec < 0 || fsec < 0) ? '-' : '+';
4775
4776 sprintf(cp, "%c%d-%d %c%" PRId64 " %c%" PRId64 ":%02d:",
4777 year_sign, abs(year), abs(mon),
4778 day_sign, i64abs(mday),
4779 sec_sign, i64abs(hour), abs(min));
4780 cp += strlen(cp);
4781 cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4782 *cp = '\0';
4783 }
4784 else if (has_year_month)
4785 {
4786 sprintf(cp, "%d-%d", year, mon);
4787 }
4788 else if (has_day)
4789 {
4790 sprintf(cp, "%" PRId64 " %" PRId64 ":%02d:",
4791 mday, hour, min);
4792 cp += strlen(cp);
4793 cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4794 *cp = '\0';
4795 }
4796 else
4797 {
4798 sprintf(cp, "%" PRId64 ":%02d:", hour, min);
4799 cp += strlen(cp);
4800 cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4801 *cp = '\0';
4802 }
4803 }
4804 break;
4805
4806 /* ISO 8601 "time-intervals by duration only" */
4807 case INTSTYLE_ISO_8601:
4808 /* special-case zero to avoid printing nothing */
4809 if (year == 0 && mon == 0 && mday == 0 &&
4810 hour == 0 && min == 0 && sec == 0 && fsec == 0)
4811 {
4812 sprintf(cp, "PT0S");
4813 break;
4814 }
4815 *cp++ = 'P';
4816 cp = AddISO8601IntPart(cp, year, 'Y');
4817 cp = AddISO8601IntPart(cp, mon, 'M');
4818 cp = AddISO8601IntPart(cp, mday, 'D');
4819 if (hour != 0 || min != 0 || sec != 0 || fsec != 0)
4820 *cp++ = 'T';
4821 cp = AddISO8601IntPart(cp, hour, 'H');
4822 cp = AddISO8601IntPart(cp, min, 'M');
4823 if (sec != 0 || fsec != 0)
4824 {
4825 if (sec < 0 || fsec < 0)
4826 *cp++ = '-';
4827 cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4828 *cp++ = 'S';
4829 *cp++ = '\0';
4830 }
4831 break;
4832
4833 /* Compatible with postgresql < 8.4 when DateStyle = 'iso' */
4834 case INTSTYLE_POSTGRES:
4835 cp = AddPostgresIntPart(cp, year, "year", &is_zero, &is_before);
4836
4837 /*
4838 * Ideally we should spell out "month" like we do for "year" and
4839 * "day". However, for backward compatibility, we can't easily
4840 * fix this. bjm 2011-05-24
4841 */
4842 cp = AddPostgresIntPart(cp, mon, "mon", &is_zero, &is_before);
4843 cp = AddPostgresIntPart(cp, mday, "day", &is_zero, &is_before);
4844 if (is_zero || hour != 0 || min != 0 || sec != 0 || fsec != 0)
4845 {
4846 bool minus = (hour < 0 || min < 0 || sec < 0 || fsec < 0);
4847
4848 sprintf(cp, "%s%s%02" PRId64 ":%02d:",
4849 is_zero ? "" : " ",
4850 (minus ? "-" : (is_before ? "+" : "")),
4851 i64abs(hour), abs(min));
4852 cp += strlen(cp);
4853 cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4854 *cp = '\0';
4855 }
4856 break;
4857
4858 /* Compatible with postgresql < 8.4 when DateStyle != 'iso' */
4859 case INTSTYLE_POSTGRES_VERBOSE:
4860 default:
4861 strcpy(cp, "@");
4862 cp++;
4863 cp = AddVerboseIntPart(cp, year, "year", &is_zero, &is_before);
4864 cp = AddVerboseIntPart(cp, mon, "mon", &is_zero, &is_before);
4865 cp = AddVerboseIntPart(cp, mday, "day", &is_zero, &is_before);
4866 cp = AddVerboseIntPart(cp, hour, "hour", &is_zero, &is_before);
4867 cp = AddVerboseIntPart(cp, min, "min", &is_zero, &is_before);
4868 if (sec != 0 || fsec != 0)
4869 {
4870 *cp++ = ' ';
4871 if (sec < 0 || (sec == 0 && fsec < 0))
4872 {
4873 if (is_zero)
4874 is_before = true;
4875 else if (!is_before)
4876 *cp++ = '-';
4877 }
4878 else if (is_before)
4879 *cp++ = '-';
4880 cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4881 /* We output "ago", not negatives, so use abs(). */
4882 sprintf(cp, " sec%s",
4883 (abs(sec) != 1 || fsec != 0) ? "s" : "");
4884 is_zero = false;
4885 }
4886 /* identically zero? then put in a unitless zero... */
4887 if (is_zero)
4888 strcat(cp, " 0");
4889 if (is_before)
4890 strcat(cp, " ago");
4891 break;
4892 }
4893}
AddPostgresIntPart
static char * AddPostgresIntPart(char *cp, int64 value, const char *units, bool *is_zero, bool *is_before)
Definition: datetime.c:4645
AppendSeconds
static char * AppendSeconds(char *cp, int sec, fsec_t fsec, int precision, bool fillzeros)
Definition: datetime.c:458
AddISO8601IntPart
static char * AddISO8601IntPart(char *cp, int64 value, char units)
Definition: datetime.c:4635
AddVerboseIntPart
static char * AddVerboseIntPart(char *cp, int64 value, const char *units, bool *is_zero, bool *is_before)
Definition: datetime.c:4668
MAX_INTERVAL_PRECISION
#define MAX_INTERVAL_PRECISION
Definition: timestamp.h:93
INTSTYLE_POSTGRES_VERBOSE
#define INTSTYLE_POSTGRES_VERBOSE
Definition: miscadmin.h:257
INTSTYLE_ISO_8601
#define INTSTYLE_ISO_8601
Definition: miscadmin.h:259
INTSTYLE_POSTGRES
#define INTSTYLE_POSTGRES
Definition: miscadmin.h:256
pg_itm::tm_hour
int64 tm_hour
Definition: timestamp.h:70
pg_itm::tm_year
int tm_year
Definition: timestamp.h:73
pg_itm::tm_mon
int tm_mon
Definition: timestamp.h:72
pg_itm::tm_mday
int tm_mday
Definition: timestamp.h:71
pg_itm::tm_sec
int tm_sec
Definition: timestamp.h:68
pg_itm::tm_min
int tm_min
Definition: timestamp.h:69
pg_itm::tm_usec
int tm_usec
Definition: timestamp.h:67

References AddISO8601IntPart(), AddPostgresIntPart(), AddVerboseIntPart(), AppendSeconds(), INTSTYLE_ISO_8601, INTSTYLE_POSTGRES, INTSTYLE_POSTGRES_VERBOSE, INTSTYLE_SQL_STANDARD, MAX_INTERVAL_PRECISION, sprintf, 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 1587 of file timestamp.c.

1588{
1589 if (TIMESTAMP_IS_NOBEGIN(dt))
1590 strcpy(str, EARLY);
1591 else if (TIMESTAMP_IS_NOEND(dt))
1592 strcpy(str, LATE);
1593 else /* shouldn't happen */
1594 elog(ERROR, "invalid argument for EncodeSpecialTimestamp");
1595}
TIMESTAMP_IS_NOEND
#define TIMESTAMP_IS_NOEND(j)
Definition: timestamp.h:167
TIMESTAMP_IS_NOBEGIN
#define TIMESTAMP_IS_NOBEGIN(j)
Definition: timestamp.h:162
EARLY
#define EARLY
Definition: datetime.h:39
LATE
#define LATE
Definition: datetime.h:40

References EARLY, elog, ERROR, LATE, 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 4434 of file datetime.c.

4435{
4436 str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4437 *str++ = ':';
4438 str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4439 *str++ = ':';
4440 str = AppendSeconds(str, tm->tm_sec, fsec, MAX_TIME_PRECISION, true);
4441 if (print_tz)
4442 str = EncodeTimezone(str, tz, style);
4443 *str = '\0';
4444}
MAX_TIME_PRECISION
#define MAX_TIME_PRECISION
Definition: date.h:45

References AppendSeconds(), EncodeTimezone(), MAX_TIME_PRECISION, pg_ultostr_zeropad(), 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 376 of file datetime.c.

377{
378 fsec_t fsec;
379
380 GetCurrentTimeUsec(tm, &fsec, NULL);
381}

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 397 of file datetime.c.

398{
399 TimestampTz cur_ts = GetCurrentTransactionStartTimestamp();
400
401 /*
402 * The cache key must include both current time and current timezone. By
403 * representing the timezone by just a pointer, we're assuming that
404 * distinct timezone settings could never have the same pointer value.
405 * This is true by virtue of the hashtable used inside pg_tzset();
406 * however, it might need another look if we ever allow entries in that
407 * hash to be recycled.
408 */
409 static TimestampTz cache_ts = 0;
410 static pg_tz *cache_timezone = NULL;
411 static struct pg_tm cache_tm;
412 static fsec_t cache_fsec;
413 static int cache_tz;
414
415 if (cur_ts != cache_ts || session_timezone != cache_timezone)
416 {
417 /*
418 * Make sure cache is marked invalid in case of error after partial
419 * update within timestamp2tm.
420 */
421 cache_timezone = NULL;
422
423 /*
424 * Perform the computation, storing results into cache. We do not
425 * really expect any error here, since current time surely ought to be
426 * within range, but check just for sanity's sake.
427 */
428 if (timestamp2tm(cur_ts, &cache_tz, &cache_tm, &cache_fsec,
429 NULL, session_timezone) != 0)
430 ereport(ERROR,
431 (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
432 errmsg("timestamp out of range")));
433
434 /* OK, so mark the cache valid. */
435 cache_ts = cur_ts;
436 cache_timezone = session_timezone;
437 }
438
439 *tm = cache_tm;
440 *fsec = cache_fsec;
441 if (tzp != NULL)
442 *tzp = cache_tz;
443}
TimestampTz
int64 TimestampTz
Definition: timestamp.h:39
GetCurrentTransactionStartTimestamp
TimestampTz GetCurrentTransactionStartTimestamp(void)
Definition: xact.c:870

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 5079 of file datetime.c.

5080{
5081 zoneabbrevtbl = tbl;
5082 /* reset tzabbrevcache, which may contain results from old table */
5083 memset(tzabbrevcache, 0, sizeof(tzabbrevcache));
5084}

References tzabbrevcache, and zoneabbrevtbl.

Referenced by assign_timezone_abbreviations().

◆ j2date()

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

Definition at line 321 of file datetime.c.

322{
323 unsigned int julian;
324 unsigned int quad;
325 unsigned int extra;
326 int y;
327
328 julian = jd;
329 julian += 32044;
330 quad = julian / 146097;
331 extra = (julian - quad * 146097) * 4 + 3;
332 julian += 60 + quad * 3 + extra / 146097;
333 quad = julian / 1461;
334 julian -= quad * 1461;
335 y = julian * 4 / 1461;
336 julian = ((y != 0) ? ((julian + 305) % 365) : ((julian + 306) % 366))
337 + 123;
338 y += quad * 4;
339 *year = y - 4800;
340 quad = julian * 2141 / 65536;
341 *day = julian - 7834 * quad / 256;
342 *month = (quad + 10) % MONTHS_PER_YEAR + 1;
343} /* j2date() */
y
int y
Definition: isn.c:76

◆ j2day()

int j2day ( int  date)

Definition at line 354 of file datetime.c.

355{
356 date += 1;
357 date %= 7;
358 /* Cope if division truncates towards zero, as it probably does */
359 if (date < 0)
360 date += 7;
361
362 return date;
363} /* j2day() */
date
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 773 of file datetime.c.

775{
776 int nf = 0;
777 const char *cp = timestr;
778 char *bufp = workbuf;
779 const char *bufend = workbuf + buflen;
780
781 /*
782 * Set the character pointed-to by "bufptr" to "newchar", and increment
783 * "bufptr". "end" gives the end of the buffer -- we return an error if
784 * there is no space left to append a character to the buffer. Note that
785 * "bufptr" is evaluated twice.
786 */
787#define APPEND_CHAR(bufptr, end, newchar) \
788 do \
789 { \
790 if (((bufptr) + 1) >= (end)) \
791 return DTERR_BAD_FORMAT; \
792 *(bufptr)++ = newchar; \
793 } while (0)
794
795 /* outer loop through fields */
796 while (*cp != '\0')
797 {
798 /* Ignore spaces between fields */
799 if (isspace((unsigned char) *cp))
800 {
801 cp++;
802 continue;
803 }
804
805 /* Record start of current field */
806 if (nf >= maxfields)
807 return DTERR_BAD_FORMAT;
808 field[nf] = bufp;
809
810 /* leading digit? then date or time */
811 if (isdigit((unsigned char) *cp))
812 {
813 APPEND_CHAR(bufp, bufend, *cp++);
814 while (isdigit((unsigned char) *cp))
815 APPEND_CHAR(bufp, bufend, *cp++);
816
817 /* time field? */
818 if (*cp == ':')
819 {
820 ftype[nf] = DTK_TIME;
821 APPEND_CHAR(bufp, bufend, *cp++);
822 while (isdigit((unsigned char) *cp) ||
823 (*cp == ':') || (*cp == '.'))
824 APPEND_CHAR(bufp, bufend, *cp++);
825 }
826 /* date field? allow embedded text month */
827 else if (*cp == '-' || *cp == '/' || *cp == '.')
828 {
829 /* save delimiting character to use later */
830 char delim = *cp;
831
832 APPEND_CHAR(bufp, bufend, *cp++);
833 /* second field is all digits? then no embedded text month */
834 if (isdigit((unsigned char) *cp))
835 {
836 ftype[nf] = ((delim == '.') ? DTK_NUMBER : DTK_DATE);
837 while (isdigit((unsigned char) *cp))
838 APPEND_CHAR(bufp, bufend, *cp++);
839
840 /*
841 * insist that the delimiters match to get a three-field
842 * date.
843 */
844 if (*cp == delim)
845 {
846 ftype[nf] = DTK_DATE;
847 APPEND_CHAR(bufp, bufend, *cp++);
848 while (isdigit((unsigned char) *cp) || *cp == delim)
849 APPEND_CHAR(bufp, bufend, *cp++);
850 }
851 }
852 else
853 {
854 ftype[nf] = DTK_DATE;
855 while (isalnum((unsigned char) *cp) || *cp == delim)
856 APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
857 }
858 }
859
860 /*
861 * otherwise, number only and will determine year, month, day, or
862 * concatenated fields later...
863 */
864 else
865 ftype[nf] = DTK_NUMBER;
866 }
867 /* Leading decimal point? Then fractional seconds... */
868 else if (*cp == '.')
869 {
870 APPEND_CHAR(bufp, bufend, *cp++);
871 while (isdigit((unsigned char) *cp))
872 APPEND_CHAR(bufp, bufend, *cp++);
873
874 ftype[nf] = DTK_NUMBER;
875 }
876
877 /*
878 * text? then date string, month, day of week, special, or timezone
879 */
880 else if (isalpha((unsigned char) *cp))
881 {
882 bool is_date;
883
884 ftype[nf] = DTK_STRING;
885 APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
886 while (isalpha((unsigned char) *cp))
887 APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
888
889 /*
890 * Dates can have embedded '-', '/', or '.' separators. It could
891 * also be a timezone name containing embedded '/', '+', '-', '_',
892 * or ':' (but '_' or ':' can't be the first punctuation). If the
893 * next character is a digit or '+', we need to check whether what
894 * we have so far is a recognized non-timezone keyword --- if so,
895 * don't believe that this is the start of a timezone.
896 */
897 is_date = false;
898 if (*cp == '-' || *cp == '/' || *cp == '.')
899 is_date = true;
900 else if (*cp == '+' || isdigit((unsigned char) *cp))
901 {
902 *bufp = '\0'; /* null-terminate current field value */
903 /* we need search only the core token table, not TZ names */
904 if (datebsearch(field[nf], datetktbl, szdatetktbl) == NULL)
905 is_date = true;
906 }
907 if (is_date)
908 {
909 ftype[nf] = DTK_DATE;
910 do
911 {
912 APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
913 } while (*cp == '+' || *cp == '-' ||
914 *cp == '/' || *cp == '_' ||
915 *cp == '.' || *cp == ':' ||
916 isalnum((unsigned char) *cp));
917 }
918 }
919 /* sign? then special or numeric timezone */
920 else if (*cp == '+' || *cp == '-')
921 {
922 APPEND_CHAR(bufp, bufend, *cp++);
923 /* soak up leading whitespace */
924 while (isspace((unsigned char) *cp))
925 cp++;
926 /* numeric timezone? */
927 /* note that "DTK_TZ" could also be a signed float or yyyy-mm */
928 if (isdigit((unsigned char) *cp))
929 {
930 ftype[nf] = DTK_TZ;
931 APPEND_CHAR(bufp, bufend, *cp++);
932 while (isdigit((unsigned char) *cp) ||
933 *cp == ':' || *cp == '.' || *cp == '-')
934 APPEND_CHAR(bufp, bufend, *cp++);
935 }
936 /* special? */
937 else if (isalpha((unsigned char) *cp))
938 {
939 ftype[nf] = DTK_SPECIAL;
940 APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
941 while (isalpha((unsigned char) *cp))
942 APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
943 }
944 /* otherwise something wrong... */
945 else
946 return DTERR_BAD_FORMAT;
947 }
948 /* ignore other punctuation but use as delimiter */
949 else if (ispunct((unsigned char) *cp))
950 {
951 cp++;
952 continue;
953 }
954 /* otherwise, something is not right... */
955 else
956 return DTERR_BAD_FORMAT;
957
958 /* force in a delimiter after each field */
959 *bufp++ = '\0';
960 nf++;
961 }
962
963 *numfields = nf;
964
965 return 0;
966}
APPEND_CHAR
#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 4962 of file datetime.c.

4963{
4964 FuncExpr *expr = castNode(FuncExpr, node);
4965 Node *ret = NULL;
4966 Node *typmod;
4967
4968 Assert(list_length(expr->args) >= 2);
4969
4970 typmod = (Node *) lsecond(expr->args);
4971
4972 if (IsA(typmod, Const) && !((Const *) typmod)->constisnull)
4973 {
4974 Node *source = (Node *) linitial(expr->args);
4975 int32 old_precis = exprTypmod(source);
4976 int32 new_precis = DatumGetInt32(((Const *) typmod)->constvalue);
4977
4978 if (new_precis < 0 || new_precis == max_precis ||
4979 (old_precis >= 0 && new_precis >= old_precis))
4980 ret = relabel_to_typmod(source, new_precis);
4981 }
4982
4983 return ret;
4984}
exprTypmod
int32 exprTypmod(const Node *expr)
Definition: nodeFuncs.c:301
relabel_to_typmod
Node * relabel_to_typmod(Node *expr, int32 typmod)
Definition: nodeFuncs.c:689
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:164
castNode
#define castNode(_type_, nodeptr)
Definition: nodes.h:182
list_length
static int list_length(const List *l)
Definition: pg_list.h:152
linitial
#define linitial(l)
Definition: pg_list.h:178
lsecond
#define lsecond(l)
Definition: pg_list.h:183
source
static rewind_source * source
Definition: pg_rewind.c:89
DatumGetInt32
static int32 DatumGetInt32(Datum X)
Definition: postgres.h:212
FuncExpr::args
List * args
Definition: primnodes.h:787
Node
Definition: nodes.h:135

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 2561 of file datetime.c.

2563{
2564 if (fmask & DTK_M(YEAR))
2565 {
2566 if (isjulian)
2567 {
2568 /* tm_year is correct and should not be touched */
2569 }
2570 else if (bc)
2571 {
2572 /* there is no year zero in AD/BC notation */
2573 if (tm->tm_year <= 0)
2574 return DTERR_FIELD_OVERFLOW;
2575 /* internally, we represent 1 BC as year zero, 2 BC as -1, etc */
2576 tm->tm_year = -(tm->tm_year - 1);
2577 }
2578 else if (is2digits)
2579 {
2580 /* process 1 or 2-digit input as 1970-2069 AD, allow '0' and '00' */
2581 if (tm->tm_year < 0) /* just paranoia */
2582 return DTERR_FIELD_OVERFLOW;
2583 if (tm->tm_year < 70)
2584 tm->tm_year += 2000;
2585 else if (tm->tm_year < 100)
2586 tm->tm_year += 1900;
2587 }
2588 else
2589 {
2590 /* there is no year zero in AD/BC notation */
2591 if (tm->tm_year <= 0)
2592 return DTERR_FIELD_OVERFLOW;
2593 }
2594 }
2595
2596 /* now that we have correct year, decode DOY */
2597 if (fmask & DTK_M(DOY))
2598 {
2599 j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
2600 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2601 }
2602
2603 /* check for valid month */
2604 if (fmask & DTK_M(MONTH))
2605 {
2606 if (tm->tm_mon < 1 || tm->tm_mon > MONTHS_PER_YEAR)
2607 return DTERR_MD_FIELD_OVERFLOW;
2608 }
2609
2610 /* minimal check for valid day */
2611 if (fmask & DTK_M(DAY))
2612 {
2613 if (tm->tm_mday < 1 || tm->tm_mday > 31)
2614 return DTERR_MD_FIELD_OVERFLOW;
2615 }
2616
2617 if ((fmask & DTK_DATE_M) == DTK_DATE_M)
2618 {
2619 /*
2620 * Check for valid day of month, now that we know for sure the month
2621 * and year. Note we don't use MD_FIELD_OVERFLOW here, since it seems
2622 * unlikely that "Feb 29" is a YMD-order error.
2623 */
2624 if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2625 return DTERR_FIELD_OVERFLOW;
2626 }
2627
2628 return 0;
2629}
day_tab
const int day_tab[2][13]
Definition: datetime.c:75
isleap
#define isleap(y)
Definition: datetime.h:271
DOY
#define DOY
Definition: datetime.h:105
pg_tm::tm_yday
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.