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Remove hard-wired lists of timezone abbreviations in favor of providing
configuration files that can be altered by a DBA. The australian_timezones GUC setting disappears, replaced by a timezone_abbreviations setting (set this to 'Australia' to get the effect of australian_timezones). The list of zone names defined by default has undergone a bit of cleanup, too. Documentation still needs some work --- in particular, should we fix Table B-4, or just get rid of it? Joachim Wieland, with some editorializing by moi.
This commit is contained in:
Tom Lane
@@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.168 2006/07/14 05:28:28 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.169 2006/07/25 03:51:21 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@@ -19,11 +19,15 @@
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#include <limits.h>
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#include <math.h>
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#include "access/heapam.h"
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#include "access/xact.h"
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#include "catalog/pg_type.h"
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#include "funcapi.h"
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#include "miscadmin.h"
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#include "utils/builtins.h"
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#include "utils/datetime.h"
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#include "utils/guc.h"
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#include "utils/memutils.h"
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#include "utils/tzparser.h"
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static int DecodeNumber(int flen, char *field, bool haveTextMonth,
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@@ -37,7 +41,7 @@ static int DecodeTime(char *str, int fmask, int *tmask,
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static int DecodeTimezone(char *str, int *tzp);
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static int DecodePosixTimezone(char *str, int *tzp);
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static int DecodeZicTimezone(char *str, int *tzp, struct pg_tm * tm);
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static datetkn *datebsearch(char *key, datetkn *base, unsigned int nel);
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static const datetkn *datebsearch(const char *key, const datetkn *base, int nel);
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static int DecodeDate(char *str, int fmask, int *tmask, struct pg_tm * tm);
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static void TrimTrailingZeros(char *str);
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@@ -87,426 +91,92 @@ char *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday",
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* which are 30 or 45 minutes away from an even hour, most are on an hour
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* boundary, and none on other boundaries.
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*
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* Let's include all strings from my current zic time zone database.
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* Not all of them are unique, or even very understandable, so we will
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* leave some commented out for now.
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* The static table contains no TZ or DTZ entries, rather those are loaded
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* from configuration files and stored in timezonetktbl, which has the same
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* format as the static datetktbl.
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*/
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static datetkn datetktbl[] = {
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static datetkn *timezonetktbl = NULL;
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static int sztimezonetktbl = 0;
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static const datetkn datetktbl[] = {
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/* text, token, lexval */
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{EARLY, RESERV, DTK_EARLY}, /* "-infinity" reserved for "early time" */
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{"abstime", IGNORE_DTF, 0}, /* for pre-v6.1 "Invalid Abstime" */
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{"acsst", DTZ, POS(42)}, /* Cent. Australia */
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{"acst", DTZ, NEG(16)}, /* Atlantic/Porto Acre Summer Time */
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{"act", TZ, NEG(20)}, /* Atlantic/Porto Acre Time */
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{DA_D, ADBC, AD}, /* "ad" for years > 0 */
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{"adt", DTZ, NEG(12)}, /* Atlantic Daylight Time */
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{"aesst", DTZ, POS(44)}, /* E. Australia */
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{"aest", TZ, POS(40)}, /* Australia Eastern Std Time */
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{"aft", TZ, POS(18)}, /* Kabul */
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{"ahst", TZ, NEG(40)}, /* Alaska-Hawaii Std Time */
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{"akdt", DTZ, NEG(32)}, /* Alaska Daylight Time */
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{"akst", DTZ, NEG(36)}, /* Alaska Standard Time */
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{"allballs", RESERV, DTK_ZULU}, /* 00:00:00 */
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{"almst", TZ, POS(28)}, /* Almaty Savings Time */
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{"almt", TZ, POS(24)}, /* Almaty Time */
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{"am", AMPM, AM},
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{"amst", DTZ, POS(20)}, /* Armenia Summer Time (Yerevan) */
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#if 0
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{"amst", DTZ, NEG(12)}, /* Amazon Summer Time (Porto Velho) */
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#endif
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{"amt", TZ, POS(16)}, /* Armenia Time (Yerevan) */
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#if 0
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{"amt", TZ, NEG(16)}, /* Amazon Time (Porto Velho) */
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#endif
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{"anast", DTZ, POS(52)}, /* Anadyr Summer Time (Russia) */
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{"anat", TZ, POS(48)}, /* Anadyr Time (Russia) */
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{"apr", MONTH, 4},
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{"april", MONTH, 4},
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#if 0
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aqtst
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aqtt
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arst
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#endif
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{"art", TZ, NEG(12)}, /* Argentina Time */
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#if 0
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ashst
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ast /* Atlantic Standard Time, Arabia Standard
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* Time, Acre Standard Time */
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#endif
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{"ast", TZ, NEG(16)}, /* Atlantic Std Time (Canada) */
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{"at", IGNORE_DTF, 0}, /* "at" (throwaway) */
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{"aug", MONTH, 8},
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{"august", MONTH, 8},
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{"awsst", DTZ, POS(36)}, /* W. Australia */
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{"awst", TZ, POS(32)}, /* W. Australia */
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{"awt", DTZ, NEG(12)},
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{"azost", DTZ, POS(0)}, /* Azores Summer Time */
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{"azot", TZ, NEG(4)}, /* Azores Time */
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{"azst", DTZ, POS(20)}, /* Azerbaijan Summer Time */
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{"azt", TZ, POS(16)}, /* Azerbaijan Time */
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{DB_C, ADBC, BC}, /* "bc" for years <= 0 */
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{"bdst", TZ, POS(8)}, /* British Double Summer Time */
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{"bdt", TZ, POS(24)}, /* Dacca */
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{"bnt", TZ, POS(32)}, /* Brunei Darussalam Time */
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{"bort", TZ, POS(32)}, /* Borneo Time (Indonesia) */
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#if 0
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bortst
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bost
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#endif
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{"bot", TZ, NEG(16)}, /* Bolivia Time */
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{"bra", TZ, NEG(12)}, /* Brazil Time */
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{"brst", DTZ, NEG(8)}, /* Brasilia Summer Time */
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{"brt", TZ, NEG(12)}, /* Brasilia Time */
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{"bst", DTZ, POS(4)}, /* British Summer Time */
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#if 0
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{"bst", TZ, NEG(12)}, /* Brazil Standard Time */
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{"bst", DTZ, NEG(44)}, /* Bering Summer Time */
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#endif
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{"bt", TZ, POS(12)}, /* Baghdad Time */
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{"btt", TZ, POS(24)}, /* Bhutan Time */
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{"cadt", DTZ, POS(42)}, /* Central Australian DST */
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{"cast", TZ, POS(38)}, /* Central Australian ST */
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{"cat", TZ, NEG(40)}, /* Central Alaska Time */
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{"cct", TZ, POS(32)}, /* China Coast Time */
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#if 0
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{"cct", TZ, POS(26)}, /* Indian Cocos (Island) Time */
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#endif
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{"cdt", DTZ, NEG(20)}, /* Central Daylight Time */
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{"cest", DTZ, POS(8)}, /* Central European Dayl.Time */
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{"cet", TZ, POS(4)}, /* Central European Time */
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{"cetdst", DTZ, POS(8)}, /* Central European Dayl.Time */
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{"chadt", DTZ, POS(55)}, /* Chatham Island Daylight Time (13:45) */
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{"chast", TZ, POS(51)}, /* Chatham Island Time (12:45) */
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#if 0
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ckhst
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#endif
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{"ckt", TZ, POS(48)}, /* Cook Islands Time */
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{"clst", DTZ, NEG(12)}, /* Chile Summer Time */
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{"clt", TZ, NEG(16)}, /* Chile Time */
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#if 0
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cost
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#endif
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{"cot", TZ, NEG(20)}, /* Columbia Time */
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{"cst", TZ, NEG(24)}, /* Central Standard Time */
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{DCURRENT, RESERV, DTK_CURRENT}, /* "current" is always now */
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#if 0
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cvst
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#endif
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{"cvt", TZ, POS(28)}, /* Christmas Island Time (Indian Ocean) */
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{"cxt", TZ, POS(28)}, /* Christmas Island Time (Indian Ocean) */
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{"d", UNITS, DTK_DAY}, /* "day of month" for ISO input */
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{"davt", TZ, POS(28)}, /* Davis Time (Antarctica) */
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{"ddut", TZ, POS(40)}, /* Dumont-d'Urville Time (Antarctica) */
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{"dec", MONTH, 12},
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{"december", MONTH, 12},
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{"dnt", TZ, POS(4)}, /* Dansk Normal Tid */
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{"dow", RESERV, DTK_DOW}, /* day of week */
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{"doy", RESERV, DTK_DOY}, /* day of year */
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{"dst", DTZMOD, 6},
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#if 0
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{"dusst", DTZ, POS(24)}, /* Dushanbe Summer Time */
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#endif
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{"easst", DTZ, NEG(20)}, /* Easter Island Summer Time */
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{"east", TZ, NEG(24)}, /* Easter Island Time */
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{"eat", TZ, POS(12)}, /* East Africa Time */
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#if 0
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{"east", DTZ, POS(16)}, /* Indian Antananarivo Savings Time */
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{"eat", TZ, POS(12)}, /* Indian Antananarivo Time */
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{"ect", TZ, NEG(16)}, /* Eastern Caribbean Time */
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{"ect", TZ, NEG(20)}, /* Ecuador Time */
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#endif
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{"edt", DTZ, NEG(16)}, /* Eastern Daylight Time */
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{"eest", DTZ, POS(12)}, /* Eastern Europe Summer Time */
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{"eet", TZ, POS(8)}, /* East. Europe, USSR Zone 1 */
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{"eetdst", DTZ, POS(12)}, /* Eastern Europe Daylight Time */
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{"egst", DTZ, POS(0)}, /* East Greenland Summer Time */
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{"egt", TZ, NEG(4)}, /* East Greenland Time */
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#if 0
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ehdt
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#endif
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{EPOCH, RESERV, DTK_EPOCH}, /* "epoch" reserved for system epoch time */
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{"est", TZ, NEG(20)}, /* Eastern Standard Time */
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{"feb", MONTH, 2},
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{"february", MONTH, 2},
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{"fjst", DTZ, NEG(52)}, /* Fiji Summer Time (13 hour offset!) */
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{"fjt", TZ, NEG(48)}, /* Fiji Time */
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{"fkst", DTZ, NEG(12)}, /* Falkland Islands Summer Time */
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{"fkt", TZ, NEG(8)}, /* Falkland Islands Time */
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{"fnst", DTZ, NEG(4)}, /* Fernando de Noronha Summer Time */
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{"fnt", TZ, NEG(8)}, /* Fernando de Noronha Time */
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{"fri", DOW, 5},
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{"friday", DOW, 5},
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{"fst", TZ, POS(4)}, /* French Summer Time */
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{"fwt", DTZ, POS(8)}, /* French Winter Time */
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{"galt", TZ, NEG(24)}, /* Galapagos Time */
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{"gamt", TZ, NEG(36)}, /* Gambier Time */
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{"gest", DTZ, POS(20)}, /* Georgia Summer Time */
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{"get", TZ, POS(16)}, /* Georgia Time */
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{"gft", TZ, NEG(12)}, /* French Guiana Time */
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#if 0
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ghst
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#endif
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{"gilt", TZ, POS(48)}, /* Gilbert Islands Time */
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{"gmt", TZ, POS(0)}, /* Greenwich Mean Time */
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{"gst", TZ, POS(40)}, /* Guam Std Time, USSR Zone 9 */
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{"gyt", TZ, NEG(16)}, /* Guyana Time */
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{"h", UNITS, DTK_HOUR}, /* "hour" */
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#if 0
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hadt
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hast
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#endif
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{"hdt", DTZ, NEG(36)}, /* Hawaii/Alaska Daylight Time */
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#if 0
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hkst
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#endif
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{"hkt", TZ, POS(32)}, /* Hong Kong Time */
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#if 0
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{"hmt", TZ, POS(12)}, /* Hellas ? ? */
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hovst
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hovt
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#endif
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{"hst", TZ, NEG(40)}, /* Hawaii Std Time */
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#if 0
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hwt
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#endif
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{"ict", TZ, POS(28)}, /* Indochina Time */
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{"idle", TZ, POS(48)}, /* Intl. Date Line, East */
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{"idlw", TZ, NEG(48)}, /* Intl. Date Line, West */
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#if 0
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idt /* Israeli, Iran, Indian Daylight Time */
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#endif
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{LATE, RESERV, DTK_LATE}, /* "infinity" reserved for "late time" */
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{INVALID, RESERV, DTK_INVALID}, /* "invalid" reserved for bad time */
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{"iot", TZ, POS(20)}, /* Indian Chagos Time */
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{"irkst", DTZ, POS(36)}, /* Irkutsk Summer Time */
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{"irkt", TZ, POS(32)}, /* Irkutsk Time */
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{"irt", TZ, POS(14)}, /* Iran Time */
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#if 0
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isst
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#endif
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{"ist", TZ, POS(8)}, /* Israel */
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{"it", TZ, POS(14)}, /* Iran Time */
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{"j", UNITS, DTK_JULIAN},
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{"jan", MONTH, 1},
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{"january", MONTH, 1},
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{"javt", TZ, POS(28)}, /* Java Time (07:00? see JT) */
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{"jayt", TZ, POS(36)}, /* Jayapura Time (Indonesia) */
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{"jd", UNITS, DTK_JULIAN},
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{"jst", TZ, POS(36)}, /* Japan Std Time,USSR Zone 8 */
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{"jt", TZ, POS(30)}, /* Java Time (07:30? see JAVT) */
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{"jul", MONTH, 7},
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{"julian", UNITS, DTK_JULIAN},
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{"july", MONTH, 7},
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{"jun", MONTH, 6},
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{"june", MONTH, 6},
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{"kdt", DTZ, POS(40)}, /* Korea Daylight Time */
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{"kgst", DTZ, POS(24)}, /* Kyrgyzstan Summer Time */
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{"kgt", TZ, POS(20)}, /* Kyrgyzstan Time */
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{"kost", TZ, POS(48)}, /* Kosrae Time */
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{"krast", DTZ, POS(28)}, /* Krasnoyarsk Summer Time */
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{"krat", TZ, POS(32)}, /* Krasnoyarsk Standard Time */
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{"kst", TZ, POS(36)}, /* Korea Standard Time */
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{"lhdt", DTZ, POS(44)}, /* Lord Howe Daylight Time, Australia */
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{"lhst", TZ, POS(42)}, /* Lord Howe Standard Time, Australia */
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{"ligt", TZ, POS(40)}, /* From Melbourne, Australia */
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{"lint", TZ, POS(56)}, /* Line Islands Time (Kiribati; +14 hours!) */
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{"lkt", TZ, POS(24)}, /* Lanka Time */
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{"m", UNITS, DTK_MONTH}, /* "month" for ISO input */
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{"magst", DTZ, POS(48)}, /* Magadan Summer Time */
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{"magt", TZ, POS(44)}, /* Magadan Time */
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{"mar", MONTH, 3},
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{"march", MONTH, 3},
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{"mart", TZ, NEG(38)}, /* Marquesas Time */
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{"mawt", TZ, POS(24)}, /* Mawson, Antarctica */
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{"may", MONTH, 5},
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{"mdt", DTZ, NEG(24)}, /* Mountain Daylight Time */
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{"mest", DTZ, POS(8)}, /* Middle Europe Summer Time */
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{"met", TZ, POS(4)}, /* Middle Europe Time */
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{"metdst", DTZ, POS(8)}, /* Middle Europe Daylight Time */
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{"mewt", TZ, POS(4)}, /* Middle Europe Winter Time */
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{"mez", TZ, POS(4)}, /* Middle Europe Zone */
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{"mht", TZ, POS(48)}, /* Kwajalein */
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{"mm", UNITS, DTK_MINUTE}, /* "minute" for ISO input */
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{"mmt", TZ, POS(26)}, /* Myanmar Time */
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{"mon", DOW, 1},
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{"monday", DOW, 1},
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#if 0
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most
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#endif
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{"mpt", TZ, POS(40)}, /* North Mariana Islands Time */
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{"msd", DTZ, POS(16)}, /* Moscow Summer Time */
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{"msk", TZ, POS(12)}, /* Moscow Time */
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{"mst", TZ, NEG(28)}, /* Mountain Standard Time */
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{"mt", TZ, POS(34)}, /* Moluccas Time */
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{"mut", TZ, POS(16)}, /* Mauritius Island Time */
|
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{"mvt", TZ, POS(20)}, /* Maldives Island Time */
|
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{"myt", TZ, POS(32)}, /* Malaysia Time */
|
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#if 0
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ncst
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#endif
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{"nct", TZ, POS(44)}, /* New Caledonia Time */
|
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{"ndt", DTZ, NEG(10)}, /* Nfld. Daylight Time */
|
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{"nft", TZ, NEG(14)}, /* Newfoundland Standard Time */
|
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{"nor", TZ, POS(4)}, /* Norway Standard Time */
|
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{"nov", MONTH, 11},
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{"november", MONTH, 11},
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{"novst", DTZ, POS(28)}, /* Novosibirsk Summer Time */
|
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{"novt", TZ, POS(24)}, /* Novosibirsk Standard Time */
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{NOW, RESERV, DTK_NOW}, /* current transaction time */
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{"npt", TZ, POS(23)}, /* Nepal Standard Time (GMT-5:45) */
|
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{"nst", TZ, NEG(14)}, /* Nfld. Standard Time */
|
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{"nt", TZ, NEG(44)}, /* Nome Time */
|
||||
{"nut", TZ, NEG(44)}, /* Niue Time */
|
||||
{"nzdt", DTZ, POS(52)}, /* New Zealand Daylight Time */
|
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{"nzst", TZ, POS(48)}, /* New Zealand Standard Time */
|
||||
{"nzt", TZ, POS(48)}, /* New Zealand Time */
|
||||
{"oct", MONTH, 10},
|
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{"october", MONTH, 10},
|
||||
{"omsst", DTZ, POS(28)}, /* Omsk Summer Time */
|
||||
{"omst", TZ, POS(24)}, /* Omsk Time */
|
||||
{"on", IGNORE_DTF, 0}, /* "on" (throwaway) */
|
||||
{"pdt", DTZ, NEG(28)}, /* Pacific Daylight Time */
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#if 0
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||||
pest
|
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#endif
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||||
{"pet", TZ, NEG(20)}, /* Peru Time */
|
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{"petst", DTZ, POS(52)}, /* Petropavlovsk-Kamchatski Summer Time */
|
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{"pett", TZ, POS(48)}, /* Petropavlovsk-Kamchatski Time */
|
||||
{"pgt", TZ, POS(40)}, /* Papua New Guinea Time */
|
||||
{"phot", TZ, POS(52)}, /* Phoenix Islands (Kiribati) Time */
|
||||
#if 0
|
||||
phst
|
||||
#endif
|
||||
{"pht", TZ, POS(32)}, /* Phillipine Time */
|
||||
{"pkt", TZ, POS(20)}, /* Pakistan Time */
|
||||
{"pm", AMPM, PM},
|
||||
{"pmdt", DTZ, NEG(8)}, /* Pierre & Miquelon Daylight Time */
|
||||
#if 0
|
||||
pmst
|
||||
#endif
|
||||
{"pont", TZ, POS(44)}, /* Ponape Time (Micronesia) */
|
||||
{"pst", TZ, NEG(32)}, /* Pacific Standard Time */
|
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{"pwt", TZ, POS(36)}, /* Palau Time */
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{"pyst", DTZ, NEG(12)}, /* Paraguay Summer Time */
|
||||
{"pyt", TZ, NEG(16)}, /* Paraguay Time */
|
||||
{"ret", DTZ, POS(16)}, /* Reunion Island Time */
|
||||
{"s", UNITS, DTK_SECOND}, /* "seconds" for ISO input */
|
||||
{"sadt", DTZ, POS(42)}, /* S. Australian Dayl. Time */
|
||||
#if 0
|
||||
samst
|
||||
samt
|
||||
#endif
|
||||
{"sast", TZ, POS(38)}, /* South Australian Std Time */
|
||||
{"sat", DOW, 6},
|
||||
{"saturday", DOW, 6},
|
||||
#if 0
|
||||
sbt
|
||||
#endif
|
||||
{"sct", DTZ, POS(16)}, /* Mahe Island Time */
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||||
{"sep", MONTH, 9},
|
||||
{"sept", MONTH, 9},
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||||
{"september", MONTH, 9},
|
||||
{"set", TZ, NEG(4)}, /* Seychelles Time ?? */
|
||||
#if 0
|
||||
sgt
|
||||
#endif
|
||||
{"sst", DTZ, POS(8)}, /* Swedish Summer Time */
|
||||
{"sun", DOW, 0},
|
||||
{"sunday", DOW, 0},
|
||||
{"swt", TZ, POS(4)}, /* Swedish Winter Time */
|
||||
#if 0
|
||||
syot
|
||||
#endif
|
||||
{"t", ISOTIME, DTK_TIME}, /* Filler for ISO time fields */
|
||||
{"tft", TZ, POS(20)}, /* Kerguelen Time */
|
||||
{"that", TZ, NEG(40)}, /* Tahiti Time */
|
||||
{"thu", DOW, 4},
|
||||
{"thur", DOW, 4},
|
||||
{"thurs", DOW, 4},
|
||||
{"thursday", DOW, 4},
|
||||
{"tjt", TZ, POS(20)}, /* Tajikistan Time */
|
||||
{"tkt", TZ, NEG(40)}, /* Tokelau Time */
|
||||
{"tmt", TZ, POS(20)}, /* Turkmenistan Time */
|
||||
{TODAY, RESERV, DTK_TODAY}, /* midnight */
|
||||
{TOMORROW, RESERV, DTK_TOMORROW}, /* tomorrow midnight */
|
||||
#if 0
|
||||
tost
|
||||
#endif
|
||||
{"tot", TZ, POS(52)}, /* Tonga Time */
|
||||
#if 0
|
||||
tpt
|
||||
#endif
|
||||
{"truk", TZ, POS(40)}, /* Truk Time */
|
||||
{"tue", DOW, 2},
|
||||
{"tues", DOW, 2},
|
||||
{"tuesday", DOW, 2},
|
||||
{"tvt", TZ, POS(48)}, /* Tuvalu Time */
|
||||
#if 0
|
||||
uct
|
||||
#endif
|
||||
{"ulast", DTZ, POS(36)}, /* Ulan Bator Summer Time */
|
||||
{"ulat", TZ, POS(32)}, /* Ulan Bator Time */
|
||||
{"undefined", RESERV, DTK_INVALID}, /* pre-v6.1 invalid time */
|
||||
{"ut", TZ, POS(0)},
|
||||
{"utc", TZ, POS(0)},
|
||||
{"uyst", DTZ, NEG(8)}, /* Uruguay Summer Time */
|
||||
{"uyt", TZ, NEG(12)}, /* Uruguay Time */
|
||||
{"uzst", DTZ, POS(24)}, /* Uzbekistan Summer Time */
|
||||
{"uzt", TZ, POS(20)}, /* Uzbekistan Time */
|
||||
{"vet", TZ, NEG(16)}, /* Venezuela Time */
|
||||
{"vlast", DTZ, POS(44)}, /* Vladivostok Summer Time */
|
||||
{"vlat", TZ, POS(40)}, /* Vladivostok Time */
|
||||
#if 0
|
||||
vust
|
||||
#endif
|
||||
{"vut", TZ, POS(44)}, /* Vanuata Time */
|
||||
{"wadt", DTZ, POS(32)}, /* West Australian DST */
|
||||
{"wakt", TZ, POS(48)}, /* Wake Time */
|
||||
#if 0
|
||||
warst
|
||||
#endif
|
||||
{"wast", TZ, POS(28)}, /* West Australian Std Time */
|
||||
{"wat", TZ, NEG(4)}, /* West Africa Time */
|
||||
{"wdt", DTZ, POS(36)}, /* West Australian DST */
|
||||
{"wed", DOW, 3},
|
||||
{"wednesday", DOW, 3},
|
||||
{"weds", DOW, 3},
|
||||
{"west", DTZ, POS(4)}, /* Western Europe Summer Time */
|
||||
{"wet", TZ, POS(0)}, /* Western Europe */
|
||||
{"wetdst", DTZ, POS(4)}, /* Western Europe Daylight Savings Time */
|
||||
{"wft", TZ, POS(48)}, /* Wallis and Futuna Time */
|
||||
{"wgst", DTZ, NEG(8)}, /* West Greenland Summer Time */
|
||||
{"wgt", TZ, NEG(12)}, /* West Greenland Time */
|
||||
{"wst", TZ, POS(32)}, /* West Australian Standard Time */
|
||||
{"y", UNITS, DTK_YEAR}, /* "year" for ISO input */
|
||||
{"yakst", DTZ, POS(40)}, /* Yakutsk Summer Time */
|
||||
{"yakt", TZ, POS(36)}, /* Yakutsk Time */
|
||||
{"yapt", TZ, POS(40)}, /* Yap Time (Micronesia) */
|
||||
{"ydt", DTZ, NEG(32)}, /* Yukon Daylight Time */
|
||||
{"yekst", DTZ, POS(24)}, /* Yekaterinburg Summer Time */
|
||||
{"yekt", TZ, POS(20)}, /* Yekaterinburg Time */
|
||||
{YESTERDAY, RESERV, DTK_YESTERDAY}, /* yesterday midnight */
|
||||
{"yst", TZ, NEG(36)}, /* Yukon Standard Time */
|
||||
{"z", TZ, POS(0)}, /* time zone tag per ISO-8601 */
|
||||
{"zp4", TZ, NEG(16)}, /* UTC +4 hours. */
|
||||
{"zp5", TZ, NEG(20)}, /* UTC +5 hours. */
|
||||
{"zp6", TZ, NEG(24)}, /* UTC +6 hours. */
|
||||
{ZULU, TZ, POS(0)}, /* UTC */
|
||||
};
|
||||
|
||||
static unsigned int szdatetktbl = sizeof datetktbl / sizeof datetktbl[0];
|
||||
|
||||
/* Used for SET australian_timezones to override North American ones */
|
||||
static datetkn australian_datetktbl[] = {
|
||||
{"acst", TZ, POS(38)}, /* Cent. Australia */
|
||||
{"cst", TZ, POS(42)}, /* Australia Central Std Time */
|
||||
{"east", TZ, POS(40)}, /* East Australian Std Time */
|
||||
{"est", TZ, POS(40)}, /* Australia Eastern Std Time */
|
||||
{"sat", TZ, POS(38)},
|
||||
};
|
||||
|
||||
static unsigned int australian_szdatetktbl = sizeof australian_datetktbl /
|
||||
sizeof australian_datetktbl[0];
|
||||
static int szdatetktbl = sizeof datetktbl / sizeof datetktbl[0];
|
||||
|
||||
static datetkn deltatktbl[] = {
|
||||
/* text, token, lexval */
|
||||
@@ -576,11 +246,11 @@ static datetkn deltatktbl[] = {
|
||||
{"yrs", UNITS, DTK_YEAR}, /* "years" relative */
|
||||
};
|
||||
|
||||
static unsigned int szdeltatktbl = sizeof deltatktbl / sizeof deltatktbl[0];
|
||||
static int szdeltatktbl = sizeof deltatktbl / sizeof deltatktbl[0];
|
||||
|
||||
static datetkn *datecache[MAXDATEFIELDS] = {NULL};
|
||||
static const datetkn *datecache[MAXDATEFIELDS] = {NULL};
|
||||
|
||||
static datetkn *deltacache[MAXDATEFIELDS] = {NULL};
|
||||
static const datetkn *deltacache[MAXDATEFIELDS] = {NULL};
|
||||
|
||||
|
||||
/*
|
||||
@@ -2998,21 +2668,15 @@ int
|
||||
DecodeSpecial(int field, char *lowtoken, int *val)
|
||||
{
|
||||
int type;
|
||||
datetkn *tp;
|
||||
const datetkn *tp;
|
||||
|
||||
if (datecache[field] != NULL &&
|
||||
strncmp(lowtoken, datecache[field]->token, TOKMAXLEN) == 0)
|
||||
tp = datecache[field];
|
||||
else
|
||||
tp = datecache[field];
|
||||
if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
|
||||
{
|
||||
tp = NULL;
|
||||
if (Australian_timezones)
|
||||
tp = datebsearch(lowtoken, australian_datetktbl,
|
||||
australian_szdatetktbl);
|
||||
if (!tp)
|
||||
tp = datebsearch(lowtoken, timezonetktbl, sztimezonetktbl);
|
||||
if (tp == NULL)
|
||||
tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
|
||||
}
|
||||
datecache[field] = tp;
|
||||
if (tp == NULL)
|
||||
{
|
||||
type = UNKNOWN_FIELD;
|
||||
@@ -3020,6 +2684,7 @@ DecodeSpecial(int field, char *lowtoken, int *val)
|
||||
}
|
||||
else
|
||||
{
|
||||
datecache[field] = tp;
|
||||
type = tp->type;
|
||||
switch (type)
|
||||
{
|
||||
@@ -3391,20 +3056,20 @@ DecodeInterval(char **field, int *ftype, int nf, int *dtype, struct pg_tm * tm,
|
||||
|
||||
/* DecodeUnits()
|
||||
* Decode text string using lookup table.
|
||||
* This routine supports time interval decoding.
|
||||
* This routine supports time interval decoding
|
||||
* (hence, it need not recognize timezone names).
|
||||
*/
|
||||
int
|
||||
DecodeUnits(int field, char *lowtoken, int *val)
|
||||
{
|
||||
int type;
|
||||
datetkn *tp;
|
||||
const datetkn *tp;
|
||||
|
||||
if (deltacache[field] != NULL &&
|
||||
strncmp(lowtoken, deltacache[field]->token, TOKMAXLEN) == 0)
|
||||
tp = deltacache[field];
|
||||
else
|
||||
tp = deltacache[field];
|
||||
if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
|
||||
{
|
||||
tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
|
||||
deltacache[field] = tp;
|
||||
}
|
||||
if (tp == NULL)
|
||||
{
|
||||
type = UNKNOWN_FIELD;
|
||||
@@ -3412,6 +3077,7 @@ DecodeUnits(int field, char *lowtoken, int *val)
|
||||
}
|
||||
else
|
||||
{
|
||||
deltacache[field] = tp;
|
||||
type = tp->type;
|
||||
if (type == TZ || type == DTZ)
|
||||
*val = FROMVAL(tp);
|
||||
@@ -3477,10 +3143,10 @@ DateTimeParseError(int dterr, const char *str, const char *datatype)
|
||||
* Binary search -- from Knuth (6.2.1) Algorithm B. Special case like this
|
||||
* is WAY faster than the generic bsearch().
|
||||
*/
|
||||
static datetkn *
|
||||
datebsearch(char *key, datetkn *base, unsigned int nel)
|
||||
static const datetkn *
|
||||
datebsearch(const char *key, const datetkn *base, int nel)
|
||||
{
|
||||
datetkn *last = base + nel - 1,
|
||||
const datetkn *last = base + nel - 1,
|
||||
*position;
|
||||
int result;
|
||||
|
||||
@@ -4082,30 +3748,15 @@ EncodeInterval(struct pg_tm * tm, fsec_t fsec, int style, char *str)
|
||||
} /* EncodeInterval() */
|
||||
|
||||
|
||||
/* GUC assign_hook for australian_timezones */
|
||||
bool
|
||||
ClearDateCache(bool newval, bool doit, GucSource source)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (doit)
|
||||
{
|
||||
for (i = 0; i < MAXDATEFIELDS; i++)
|
||||
datecache[i] = NULL;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/*
|
||||
* We've been burnt by stupid errors in the ordering of the datetkn tables
|
||||
* once too often. Arrange to check them during postmaster start.
|
||||
*/
|
||||
static bool
|
||||
CheckDateTokenTable(const char *tablename, datetkn *base, unsigned int nel)
|
||||
CheckDateTokenTable(const char *tablename, const datetkn *base, int nel)
|
||||
{
|
||||
bool ok = true;
|
||||
unsigned int i;
|
||||
int i;
|
||||
|
||||
for (i = 1; i < nel; i++)
|
||||
{
|
||||
@@ -4131,8 +3782,135 @@ CheckDateTokenTables(void)
|
||||
|
||||
ok &= CheckDateTokenTable("datetktbl", datetktbl, szdatetktbl);
|
||||
ok &= CheckDateTokenTable("deltatktbl", deltatktbl, szdeltatktbl);
|
||||
ok &= CheckDateTokenTable("australian_datetktbl",
|
||||
australian_datetktbl,
|
||||
australian_szdatetktbl);
|
||||
return ok;
|
||||
}
|
||||
|
||||
/*
|
||||
* This function gets called during timezone config file load or reload
|
||||
* to create the final array of timezone tokens. The argument array
|
||||
* is already sorted in name order. This data is in a temporary memory
|
||||
* context and must be copied to somewhere permanent.
|
||||
*/
|
||||
void
|
||||
InstallTimeZoneAbbrevs(tzEntry *abbrevs, int n)
|
||||
{
|
||||
datetkn *newtbl;
|
||||
int i;
|
||||
|
||||
/*
|
||||
* Copy the data into TopMemoryContext and convert to datetkn format.
|
||||
*/
|
||||
newtbl = (datetkn *) MemoryContextAlloc(TopMemoryContext,
|
||||
n * sizeof(datetkn));
|
||||
for (i = 0; i < n; i++)
|
||||
{
|
||||
strncpy(newtbl[i].token, abbrevs[i].abbrev, TOKMAXLEN);
|
||||
newtbl[i].type = abbrevs[i].is_dst ? DTZ : TZ;
|
||||
TOVAL(&newtbl[i], abbrevs[i].offset / 60);
|
||||
}
|
||||
|
||||
/* Check the ordering, if testing */
|
||||
Assert(CheckDateTokenTable("timezone offset", newtbl, n));
|
||||
|
||||
/* Now safe to replace existing table (if any) */
|
||||
if (timezonetktbl)
|
||||
pfree(timezonetktbl);
|
||||
timezonetktbl = newtbl;
|
||||
sztimezonetktbl = n;
|
||||
|
||||
/* clear date cache in case it contains any stale timezone names */
|
||||
for (i = 0; i < MAXDATEFIELDS; i++)
|
||||
datecache[i] = NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* This set-returning function reads all the available time zone abbreviations
|
||||
* and returns a set of (name, utc_offset, is_dst).
|
||||
*/
|
||||
Datum
|
||||
pg_timezonenames(PG_FUNCTION_ARGS)
|
||||
{
|
||||
FuncCallContext *funcctx;
|
||||
int *pindex;
|
||||
Datum result;
|
||||
Interval *resInterval;
|
||||
HeapTuple tuple;
|
||||
Datum values[3];
|
||||
bool nulls[3];
|
||||
char buffer[TOKMAXLEN + 1];
|
||||
unsigned char *p;
|
||||
struct pg_tm tm;
|
||||
|
||||
/* stuff done only on the first call of the function */
|
||||
if (SRF_IS_FIRSTCALL())
|
||||
{
|
||||
TupleDesc tupdesc;
|
||||
MemoryContext oldcontext;
|
||||
|
||||
/* create a function context for cross-call persistence */
|
||||
funcctx = SRF_FIRSTCALL_INIT();
|
||||
|
||||
/*
|
||||
* switch to memory context appropriate for multiple function
|
||||
* calls
|
||||
*/
|
||||
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
|
||||
|
||||
/* allocate memory for user context */
|
||||
pindex = (int *) palloc(sizeof(int));
|
||||
*pindex = 0;
|
||||
funcctx->user_fctx = (void *) pindex;
|
||||
|
||||
/*
|
||||
* build tupdesc for result tuples. This must match the
|
||||
* definition of the pg_timezonenames view in system_views.sql
|
||||
*/
|
||||
tupdesc = CreateTemplateTupleDesc(3, false);
|
||||
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
|
||||
TEXTOID, -1, 0);
|
||||
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "utc_offset",
|
||||
INTERVALOID, -1, 0);
|
||||
TupleDescInitEntry(tupdesc, (AttrNumber) 3, "is_dst",
|
||||
BOOLOID, -1, 0);
|
||||
|
||||
funcctx->tuple_desc = BlessTupleDesc(tupdesc);
|
||||
MemoryContextSwitchTo(oldcontext);
|
||||
}
|
||||
|
||||
/* stuff done on every call of the function */
|
||||
funcctx = SRF_PERCALL_SETUP();
|
||||
pindex = (int *) funcctx->user_fctx;
|
||||
|
||||
if (*pindex >= sztimezonetktbl)
|
||||
SRF_RETURN_DONE(funcctx);
|
||||
|
||||
MemSet(nulls, 0, sizeof(nulls));
|
||||
|
||||
/*
|
||||
* Convert name to text, using upcasing conversion that is the inverse
|
||||
* of what ParseDateTime() uses.
|
||||
*/
|
||||
strncpy(buffer, timezonetktbl[*pindex].token, TOKMAXLEN);
|
||||
buffer[TOKMAXLEN] = '\0'; /* may not be null-terminated */
|
||||
for (p = (unsigned char *) buffer; *p; p++)
|
||||
*p = pg_toupper(*p);
|
||||
|
||||
values[0] = DirectFunctionCall1(textin, CStringGetDatum(buffer));
|
||||
|
||||
MemSet(&tm, 0, sizeof(struct pg_tm));
|
||||
tm.tm_min = (-1) * FROMVAL(&timezonetktbl[*pindex]);
|
||||
resInterval = (Interval *) palloc(sizeof(Interval));
|
||||
tm2interval(&tm, 0, resInterval);
|
||||
values[1] = IntervalPGetDatum(resInterval);
|
||||
|
||||
Assert(timezonetktbl[*pindex].type == DTZ ||
|
||||
timezonetktbl[*pindex].type == TZ);
|
||||
values[2] = BoolGetDatum(timezonetktbl[*pindex].type == DTZ);
|
||||
|
||||
(*pindex)++;
|
||||
|
||||
tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
|
||||
result = HeapTupleGetDatum(tuple);
|
||||
|
||||
SRF_RETURN_NEXT(funcctx, result);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user