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Implement TZH and TZM timestamp format patterns

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These are compatible with Oracle and required for the datetime template
language for jsonpath in an upcoming patch.

Nikita Glukhov and Andrew Dunstan, reviewed by Pavel Stehule.
This commit is contained in:
Andrew Dunstan 2018-01-09 14:25:05 -05:00
parent a77dd53f30
commit 11b623dd0a
6 changed files with 164 additions and 41 deletions
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8
doc/src/sgml/func.sgml
View File

@ -6073,6 +6073,14 @@ SELECT regexp_match('abc01234xyz', '(?:(.*?)(\d+)(.*)){1,1}');
<entry>lower case time-zone abbreviation
(only supported in <function>to_char</function>)</entry>
</row>
<row>
<entry><literal>TZH</literal></entry>
<entry>time-zone hours</entry>
</row>
<row>
<entry><literal>TZM</literal></entry>
<entry>time-zone minutes</entry>
</row>
<row>
<entry><literal>OF</literal></entry>
<entry>time-zone offset from UTC

69
src/backend/utils/adt/formatting.c
View File

@ -424,7 +424,10 @@ typedef struct
j,
us,
yysz, /* is it YY or YYYY ? */
clock; /* 12 or 24 hour clock? */
clock, /* 12 or 24 hour clock? */
tzsign, /* +1, -1 or 0 if timezone info is absent */
tzh,
tzm;
} TmFromChar;
#define ZERO_tmfc(_X) memset(_X, 0, sizeof(TmFromChar))
@ -470,6 +473,7 @@ do { \
(_X)->tm_sec = (_X)->tm_year = (_X)->tm_min = (_X)->tm_wday = \
(_X)->tm_hour = (_X)->tm_yday = (_X)->tm_isdst = 0; \
(_X)->tm_mday = (_X)->tm_mon = 1; \
(_X)->tm_zone = NULL; \
} while(0)
#define ZERO_tmtc(_X) \
@ -609,6 +613,8 @@ typedef enum
DCH_RM,
DCH_SSSS,
DCH_SS,
DCH_TZH,
DCH_TZM,
DCH_TZ,
DCH_US,
DCH_WW,
@ -756,7 +762,9 @@ static const KeyWord DCH_keywords[] = {
{"RM", 2, DCH_RM, false, FROM_CHAR_DATE_GREGORIAN}, /* R */
{"SSSS", 4, DCH_SSSS, true, FROM_CHAR_DATE_NONE}, /* S */
{"SS", 2, DCH_SS, true, FROM_CHAR_DATE_NONE},
{"TZ", 2, DCH_TZ, false, FROM_CHAR_DATE_NONE}, /* T */
{"TZH", 3, DCH_TZH, false, FROM_CHAR_DATE_NONE}, /* T */
{"TZM", 3, DCH_TZM, true, FROM_CHAR_DATE_NONE},
{"TZ", 2, DCH_TZ, false, FROM_CHAR_DATE_NONE},
{"US", 2, DCH_US, true, FROM_CHAR_DATE_NONE}, /* U */
{"WW", 2, DCH_WW, true, FROM_CHAR_DATE_GREGORIAN}, /* W */
{"W", 1, DCH_W, true, FROM_CHAR_DATE_GREGORIAN},
@ -879,7 +887,7 @@ static const int DCH_index[KeyWord_INDEX_SIZE] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, DCH_A_D, DCH_B_C, DCH_CC, DCH_DAY, -1,
DCH_FX, -1, DCH_HH24, DCH_IDDD, DCH_J, -1, -1, DCH_MI, -1, DCH_OF,
DCH_P_M, DCH_Q, DCH_RM, DCH_SSSS, DCH_TZ, DCH_US, -1, DCH_WW, -1, DCH_Y_YYY,
DCH_P_M, DCH_Q, DCH_RM, DCH_SSSS, DCH_TZH, DCH_US, -1, DCH_WW, -1, DCH_Y_YYY,
-1, -1, -1, -1, -1, -1, -1, DCH_a_d, DCH_b_c, DCH_cc,
DCH_day, -1, DCH_fx, -1, DCH_hh24, DCH_iddd, DCH_j, -1, -1, DCH_mi,
-1, -1, DCH_p_m, DCH_q, DCH_rm, DCH_ssss, DCH_tz, DCH_us, -1, DCH_ww,
@ -2519,6 +2527,19 @@ DCH_to_char(FormatNode *node, bool is_interval, TmToChar *in, char *out, Oid col
s += strlen(s);
}
break;
case DCH_TZH:
INVALID_FOR_INTERVAL;
sprintf(s, "%c%02d",
(tm->tm_gmtoff >= 0) ? '+' : '-',
abs((int) tm->tm_gmtoff) / SECS_PER_HOUR);
s += strlen(s);
break;
case DCH_TZM:
INVALID_FOR_INTERVAL;
sprintf(s, "%02d",
(abs((int) tm->tm_gmtoff) % SECS_PER_HOUR) / SECS_PER_MINUTE);
s += strlen(s);
break;
case DCH_OF:
INVALID_FOR_INTERVAL;
sprintf(s, "%c%0*d",
@ -3070,6 +3091,20 @@ DCH_from_char(FormatNode *node, char *in, TmFromChar *out)
errmsg("formatting field \"%s\" is only supported in to_char",
n->key->name)));
break;
case DCH_TZH:
out->tzsign = *s == '-' ? -1 : +1;
if (*s == '+' || *s == '-' || *s == ' ')
s++;
from_char_parse_int_len(&out->tzh, &s, 2, n);
break;
case DCH_TZM:
/* assign positive timezone sign if TZH was not seen before */
if (!out->tzsign)
out->tzsign = +1;
from_char_parse_int_len(&out->tzm, &s, 2, n);
break;
case DCH_A_D:
case DCH_B_C:
case DCH_a_d:
@ -3536,7 +3571,16 @@ to_timestamp(PG_FUNCTION_ARGS)
do_to_timestamp(date_txt, fmt, &tm, &fsec);
tz = DetermineTimeZoneOffset(&tm, session_timezone);
/* Use the specified time zone, if any. */
if (tm.tm_zone)
{
int dterr = DecodeTimezone((char *) tm.tm_zone, &tz);
if (dterr)
DateTimeParseError(dterr, text_to_cstring(date_txt), "timestamptz");
}
else
tz = DetermineTimeZoneOffset(&tm, session_timezone);
if (tm2timestamp(&tm, fsec, &tz, &result) != 0)
ereport(ERROR,
@ -3858,6 +3902,23 @@ do_to_timestamp(text *date_txt, text *fmt,
*fsec < INT64CONST(0) || *fsec >= USECS_PER_SEC)
DateTimeParseError(DTERR_FIELD_OVERFLOW, date_str, "timestamp");
/* Save parsed time-zone into tm->tm_zone if it was specified */
if (tmfc.tzsign)
{
char *tz;
if (tmfc.tzh < 0 || tmfc.tzh > MAX_TZDISP_HOUR ||
tmfc.tzm < 0 || tmfc.tzm >= MINS_PER_HOUR)
DateTimeParseError(DTERR_TZDISP_OVERFLOW, date_str, "timestamp");
tz = palloc(7);
snprintf(tz, 7, "%c%02d:%02d",
tmfc.tzsign > 0 ? '+' : '-', tmfc.tzh, tmfc.tzm);
tm->tm_zone = tz;
}
DEBUG_TM(tm);
pfree(date_str);

30
src/test/regress/expected/horology.out
View File

@ -2930,6 +2930,36 @@ SELECT to_timestamp('2011-12-18 11:38 PM', 'YYYY-MM-DD HH12:MI PM');
Sun Dec 18 23:38:00 2011 PST
(1 row)
SELECT to_timestamp('2011-12-18 11:38 +05', 'YYYY-MM-DD HH12:MI TZH');
to_timestamp
------------------------------
Sat Dec 17 22:38:00 2011 PST
(1 row)
SELECT to_timestamp('2011-12-18 11:38 -05', 'YYYY-MM-DD HH12:MI TZH');
to_timestamp
------------------------------
Sun Dec 18 08:38:00 2011 PST
(1 row)
SELECT to_timestamp('2011-12-18 11:38 +05:20', 'YYYY-MM-DD HH12:MI TZH:TZM');
to_timestamp
------------------------------
Sat Dec 17 22:18:00 2011 PST
(1 row)
SELECT to_timestamp('2011-12-18 11:38 -05:20', 'YYYY-MM-DD HH12:MI TZH:TZM');
to_timestamp
------------------------------
Sun Dec 18 08:58:00 2011 PST
(1 row)
SELECT to_timestamp('2011-12-18 11:38 20', 'YYYY-MM-DD HH12:MI TZM');
to_timestamp
------------------------------
Sun Dec 18 03:18:00 2011 PST
(1 row)
--
-- Check handling of multiple spaces in format and/or input
--

72
src/test/regress/expected/timestamptz.out
View File

@ -1699,54 +1699,68 @@ SELECT '' AS to_char_11, to_char(d1, 'FMIYYY FMIYY FMIY FMI FMIW FMIDDD FMID')
| 2001 1 1 1 1 1 1
(66 rows)
-- Check OF with various zone offsets, particularly fractional hours
-- Check OF, TZH, TZM with various zone offsets, particularly fractional hours
SET timezone = '00:00';
SELECT to_char(now(), 'OF');
to_char
---------
+00
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
-----+---------
+00 | +00:00
(1 row)
SET timezone = '+02:00';
SELECT to_char(now(), 'OF');
to_char
---------
-02
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
-----+---------
-02 | -02:00
(1 row)
SET timezone = '-13:00';
SELECT to_char(now(), 'OF');
to_char
---------
+13
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
-----+---------
+13 | +13:00
(1 row)
SET timezone = '-00:30';
SELECT to_char(now(), 'OF');
to_char
---------
+00:30
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
--------+---------
+00:30 | +00:30
(1 row)
SET timezone = '00:30';
SELECT to_char(now(), 'OF');
to_char
---------
-00:30
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
--------+---------
-00:30 | -00:30
(1 row)
SET timezone = '-04:30';
SELECT to_char(now(), 'OF');
to_char
---------
+04:30
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
--------+---------
+04:30 | +04:30
(1 row)
SET timezone = '04:30';
SELECT to_char(now(), 'OF');
to_char
---------
-04:30
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
--------+---------
-04:30 | -04:30
(1 row)
SET timezone = '-04:15';
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
--------+---------
+04:15 | +04:15
(1 row)
SET timezone = '04:15';
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
OF | TZH:TZM
--------+---------
-04:15 | -04:15
(1 row)
RESET timezone;

6
src/test/regress/sql/horology.sql
View File

@ -446,6 +446,12 @@ SELECT to_timestamp(' 20050302', 'YYYYMMDD');
SELECT to_timestamp('2011-12-18 11:38 AM', 'YYYY-MM-DD HH12:MI PM');
SELECT to_timestamp('2011-12-18 11:38 PM', 'YYYY-MM-DD HH12:MI PM');
SELECT to_timestamp('2011-12-18 11:38 +05', 'YYYY-MM-DD HH12:MI TZH');
SELECT to_timestamp('2011-12-18 11:38 -05', 'YYYY-MM-DD HH12:MI TZH');
SELECT to_timestamp('2011-12-18 11:38 +05:20', 'YYYY-MM-DD HH12:MI TZH:TZM');
SELECT to_timestamp('2011-12-18 11:38 -05:20', 'YYYY-MM-DD HH12:MI TZH:TZM');
SELECT to_timestamp('2011-12-18 11:38 20', 'YYYY-MM-DD HH12:MI TZM');
--
-- Check handling of multiple spaces in format and/or input
--

20
src/test/regress/sql/timestamptz.sql
View File

@ -248,21 +248,25 @@ SELECT '' AS to_char_10, to_char(d1, 'IYYY IYY IY I IW IDDD ID')
SELECT '' AS to_char_11, to_char(d1, 'FMIYYY FMIYY FMIY FMI FMIW FMIDDD FMID')
FROM TIMESTAMPTZ_TBL;
-- Check OF with various zone offsets, particularly fractional hours
-- Check OF, TZH, TZM with various zone offsets, particularly fractional hours
SET timezone = '00:00';
SELECT to_char(now(), 'OF');
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '+02:00';
SELECT to_char(now(), 'OF');
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '-13:00';
SELECT to_char(now(), 'OF');
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '-00:30';
SELECT to_char(now(), 'OF');
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '00:30';
SELECT to_char(now(), 'OF');
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '-04:30';
SELECT to_char(now(), 'OF');
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '04:30';
SELECT to_char(now(), 'OF');
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '-04:15';
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
SET timezone = '04:15';
SELECT to_char(now(), 'OF') as "OF", to_char(now(), 'TZH:TZM') as "TZH:TZM";
RESET timezone;
CREATE TABLE TIMESTAMPTZ_TST (a int , b timestamptz);