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Support for FF1-FF6 datetime format patterns
SQL Standard 2016 defines FF1-FF9 format patters for fractions of seconds in jsonpath .datetime() method and CAST (... FORMAT ...) SQL clause. Parsing engine of upcoming .datetime() method will be shared with to_date()/ to_timestamp(). This patch implements FF1-FF6 format patterns for upcoming jsonpath .datetime() method. to_date()/to_timestamp() functions will also get support of this format patterns as positive side effect. FF7-FF9 are not supported due to lack of precision in our internal timestamp representation. Extracted from original patch by Nikita Glukhov, Teodor Sigaev, Oleg Bartunov. Heavily revised by me. Discussion: https://postgr.es/m/fcc6fc6a-b497-f39a-923d-aa34d0c588e8%402ndQuadrant.com Discussion: https://postgr.es/m/CAPpHfdsZgYEra_PeCLGNoXOWYx6iU-S3wF8aX0ObQUcZU%2B4XTw%40mail.gmail.com Author: Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Alexander Korotkov Reviewed-by: Anastasia Lubennikova, Peter Eisentraut
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+239
-23
lines changed

10 files changed

+239
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lines changed

‎doc/src/sgml/func.sgml

Lines changed: 24 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -6150,6 +6150,30 @@ SELECT regexp_match('abc01234xyz', '(?:(.*?)(\d+)(.*)){1,1}');
61506150
<entry><literal>US</literal></entry>
61516151
<entry>microsecond (000000-999999)</entry>
61526152
</row>
6153+
<row>
6154+
<entry><literal>FF1</literal></entry>
6155+
<entry>tenth of second (0-9)</entry>
6156+
</row>
6157+
<row>
6158+
<entry><literal>FF2</literal></entry>
6159+
<entry>hundredth of second (00-99)</entry>
6160+
</row>
6161+
<row>
6162+
<entry><literal>FF3</literal></entry>
6163+
<entry>millisecond (000-999)</entry>
6164+
</row>
6165+
<row>
6166+
<entry><literal>FF4</literal></entry>
6167+
<entry>tenth of a millisecond (0000-9999)</entry>
6168+
</row>
6169+
<row>
6170+
<entry><literal>FF5</literal></entry>
6171+
<entry>hundredth of a millisecond (00000-99999)</entry>
6172+
</row>
6173+
<row>
6174+
<entry><literal>FF6</literal></entry>
6175+
<entry>microsecond (000000-999999)</entry>
6176+
</row>
61536177
<row>
61546178
<entry><literal>SSSS</literal></entry>
61556179
<entry>seconds past midnight (0-86399)</entry>

‎src/backend/utils/adt/formatting.c

Lines changed: 78 additions & 21 deletions
Original file line numberDiff line numberDiff line change
@@ -86,6 +86,7 @@
8686
#endif
8787

8888
#include "catalog/pg_collation.h"
89+
#include "catalog/pg_type.h"
8990
#include "mb/pg_wchar.h"
9091
#include "utils/builtins.h"
9192
#include "utils/date.h"
@@ -434,7 +435,8 @@ typedef struct
434435
clock, /* 12 or 24 hour clock? */
435436
tzsign, /* +1, -1 or 0 if timezone info is absent */
436437
tzh,
437-
tzm;
438+
tzm,
439+
ff; /* fractional precision */
438440
} TmFromChar;
439441

440442
#define ZERO_tmfc(_X) memset(_X, 0, sizeof(TmFromChar))
@@ -594,6 +596,12 @@ typedef enum
594596
DCH_Day,
595597
DCH_Dy,
596598
DCH_D,
599+
DCH_FF1,
600+
DCH_FF2,
601+
DCH_FF3,
602+
DCH_FF4,
603+
DCH_FF5,
604+
DCH_FF6,
597605
DCH_FX, /* global suffix */
598606
DCH_HH24,
599607
DCH_HH12,
@@ -643,6 +651,12 @@ typedef enum
643651
DCH_dd,
644652
DCH_dy,
645653
DCH_d,
654+
DCH_ff1,
655+
DCH_ff2,
656+
DCH_ff3,
657+
DCH_ff4,
658+
DCH_ff5,
659+
DCH_ff6,
646660
DCH_fx,
647661
DCH_hh24,
648662
DCH_hh12,
@@ -743,7 +757,13 @@ static const KeyWord DCH_keywords[] = {
743757
{"Day", 3, DCH_Day, false, FROM_CHAR_DATE_NONE},
744758
{"Dy", 2, DCH_Dy, false, FROM_CHAR_DATE_NONE},
745759
{"D", 1, DCH_D, true, FROM_CHAR_DATE_GREGORIAN},
746-
{"FX", 2, DCH_FX, false, FROM_CHAR_DATE_NONE}, /* F */
760+
{"FF1", 3, DCH_FF1, false, FROM_CHAR_DATE_NONE}, /* F */
761+
{"FF2", 3, DCH_FF2, false, FROM_CHAR_DATE_NONE},
762+
{"FF3", 3, DCH_FF3, false, FROM_CHAR_DATE_NONE},
763+
{"FF4", 3, DCH_FF4, false, FROM_CHAR_DATE_NONE},
764+
{"FF5", 3, DCH_FF5, false, FROM_CHAR_DATE_NONE},
765+
{"FF6", 3, DCH_FF6, false, FROM_CHAR_DATE_NONE},
766+
{"FX", 2, DCH_FX, false, FROM_CHAR_DATE_NONE},
747767
{"HH24", 4, DCH_HH24, true, FROM_CHAR_DATE_NONE}, /* H */
748768
{"HH12", 4, DCH_HH12, true, FROM_CHAR_DATE_NONE},
749769
{"HH", 2, DCH_HH, true, FROM_CHAR_DATE_NONE},
@@ -792,7 +812,13 @@ static const KeyWord DCH_keywords[] = {
792812
{"dd", 2, DCH_DD, true, FROM_CHAR_DATE_GREGORIAN},
793813
{"dy", 2, DCH_dy, false, FROM_CHAR_DATE_NONE},
794814
{"d", 1, DCH_D, true, FROM_CHAR_DATE_GREGORIAN},
795-
{"fx", 2, DCH_FX, false, FROM_CHAR_DATE_NONE}, /* f */
815+
{"ff1", 3, DCH_FF1, false, FROM_CHAR_DATE_NONE}, /* f */
816+
{"ff2", 3, DCH_FF2, false, FROM_CHAR_DATE_NONE},
817+
{"ff3", 3, DCH_FF3, false, FROM_CHAR_DATE_NONE},
818+
{"ff4", 3, DCH_FF4, false, FROM_CHAR_DATE_NONE},
819+
{"ff5", 3, DCH_FF5, false, FROM_CHAR_DATE_NONE},
820+
{"ff6", 3, DCH_FF6, false, FROM_CHAR_DATE_NONE},
821+
{"fx", 2, DCH_FX, false, FROM_CHAR_DATE_NONE},
796822
{"hh24", 4, DCH_HH24, true, FROM_CHAR_DATE_NONE}, /* h */
797823
{"hh12", 4, DCH_HH12, true, FROM_CHAR_DATE_NONE},
798824
{"hh", 2, DCH_HH, true, FROM_CHAR_DATE_NONE},
@@ -893,10 +919,10 @@ static const int DCH_index[KeyWord_INDEX_SIZE] = {
893919
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
894920
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
895921
-1, -1, -1, -1, -1, DCH_A_D, DCH_B_C, DCH_CC, DCH_DAY, -1,
896-
DCH_FX, -1, DCH_HH24, DCH_IDDD, DCH_J, -1, -1, DCH_MI, -1, DCH_OF,
922+
DCH_FF1, -1, DCH_HH24, DCH_IDDD, DCH_J, -1, -1, DCH_MI, -1, DCH_OF,
897923
DCH_P_M, DCH_Q, DCH_RM, DCH_SSSS, DCH_TZH, DCH_US, -1, DCH_WW, -1, DCH_Y_YYY,
898924
-1, -1, -1, -1, -1, -1, -1, DCH_a_d, DCH_b_c, DCH_cc,
899-
DCH_day, -1, DCH_fx, -1, DCH_hh24, DCH_iddd, DCH_j, -1, -1, DCH_mi,
925+
DCH_day, -1, DCH_ff1, -1, DCH_hh24, DCH_iddd, DCH_j, -1, -1, DCH_mi,
900926
-1, -1, DCH_p_m, DCH_q, DCH_rm, DCH_ssss, DCH_tz, DCH_us, -1, DCH_ww,
901927
-1, DCH_y_yyy, -1, -1, -1, -1
902928

@@ -960,7 +986,6 @@ typedef struct NUMProc
960986
*L_currency_symbol;
961987
} NUMProc;
962988

963-
964989
/* ----------
965990
* Functions
966991
* ----------
@@ -993,7 +1018,7 @@ static int from_char_parse_int(int *dest, char **src, FormatNode *node);
9931018
static int seq_search(char *name, const char *const *array, int type, int max, int *len);
9941019
static int from_char_seq_search(int *dest, char **src, const char *const *array, int type, int max, FormatNode *node);
9951020
static void do_to_timestamp(text *date_txt, text *fmt,
996-
struct pg_tm *tm, fsec_t *fsec);
1021+
struct pg_tm *tm, fsec_t *fsec, int *fprec);
9971022
static char *fill_str(char *str, int c, int max);
9981023
static FormatNode *NUM_cache(int len, NUMDesc *Num, text *pars_str, bool *shouldFree);
9991024
static char *int_to_roman(int number);
@@ -2518,18 +2543,32 @@ DCH_to_char(FormatNode *node, bool is_interval, TmToChar *in, char *out, Oid col
25182543
str_numth(s, s, S_TH_TYPE(n->suffix));
25192544
s += strlen(s);
25202545
break;
2521-
case DCH_MS: /* millisecond */
2522-
sprintf(s, "%03d", (int) (in->fsec / INT64CONST(1000)));
2523-
if (S_THth(n->suffix))
2524-
str_numth(s, s, S_TH_TYPE(n->suffix));
2546+
#define DCH_to_char_fsec(frac_fmt, frac_val) \
2547+
sprintf(s, frac_fmt, (int) (frac_val)); \
2548+
if (S_THth(n->suffix)) \
2549+
str_numth(s, s, S_TH_TYPE(n->suffix)); \
25252550
s += strlen(s);
2551+
case DCH_FF1: /* tenth of second */
2552+
DCH_to_char_fsec("%01d", in->fsec / 100000);
2553+
break;
2554+
case DCH_FF2: /* hundredth of second */
2555+
DCH_to_char_fsec("%02d", in->fsec / 10000);
2556+
break;
2557+
case DCH_FF3:
2558+
case DCH_MS: /* millisecond */
2559+
DCH_to_char_fsec("%03d", in->fsec / 1000);
25262560
break;
2561+
case DCH_FF4: /* tenth of a millisecond */
2562+
DCH_to_char_fsec("%04d", in->fsec / 100);
2563+
break;
2564+
case DCH_FF5: /* hundredth of a millisecond */
2565+
DCH_to_char_fsec("%05d", in->fsec / 10);
2566+
break;
2567+
case DCH_FF6:
25272568
case DCH_US: /* microsecond */
2528-
sprintf(s, "%06d", (int) in->fsec);
2529-
if (S_THth(n->suffix))
2530-
str_numth(s, s, S_TH_TYPE(n->suffix));
2531-
s += strlen(s);
2569+
DCH_to_char_fsec("%06d", in->fsec);
25322570
break;
2571+
#undef DCH_to_char_fsec
25332572
case DCH_SSSS:
25342573
sprintf(s, "%d", tm->tm_hour * SECS_PER_HOUR +
25352574
tm->tm_min * SECS_PER_MINUTE +
@@ -3154,8 +3193,18 @@ DCH_from_char(FormatNode *node, char *in, TmFromChar *out)
31543193

31553194
SKIP_THth(s, n->suffix);
31563195
break;
3196+
case DCH_FF1:
3197+
case DCH_FF2:
3198+
case DCH_FF3:
3199+
case DCH_FF4:
3200+
case DCH_FF5:
3201+
case DCH_FF6:
3202+
out->ff = n->key->id - DCH_FF1 + 1;
3203+
/* fall through */
31573204
case DCH_US: /* microsecond */
3158-
len = from_char_parse_int_len(&out->us, &s, 6, n);
3205+
len = from_char_parse_int_len(&out->us, &s,
3206+
n->key->id == DCH_US ? 6 :
3207+
out->ff, n);
31593208

31603209
out->us *= len == 1 ? 100000 :
31613210
len == 2 ? 10000 :
@@ -3689,8 +3738,9 @@ to_timestamp(PG_FUNCTION_ARGS)
36893738
int tz;
36903739
struct pg_tm tm;
36913740
fsec_t fsec;
3741+
int fprec;
36923742

3693-
do_to_timestamp(date_txt, fmt, &tm, &fsec);
3743+
do_to_timestamp(date_txt, fmt, &tm, &fsec, &fprec);
36943744

36953745
/* Use the specified time zone, if any. */
36963746
if (tm.tm_zone)
@@ -3708,6 +3758,10 @@ to_timestamp(PG_FUNCTION_ARGS)
37083758
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
37093759
errmsg("timestamp out of range")));
37103760

3761+
/* Use the specified fractional precision, if any. */
3762+
if (fprec)
3763+
AdjustTimestampForTypmod(&result, fprec);
3764+
37113765
PG_RETURN_TIMESTAMP(result);
37123766
}
37133767

@@ -3725,7 +3779,7 @@ to_date(PG_FUNCTION_ARGS)
37253779
struct pg_tm tm;
37263780
fsec_t fsec;
37273781

3728-
do_to_timestamp(date_txt, fmt, &tm, &fsec);
3782+
do_to_timestamp(date_txt, fmt, &tm, &fsec, NULL);
37293783

37303784
/* Prevent overflow in Julian-day routines */
37313785
if (!IS_VALID_JULIAN(tm.tm_year, tm.tm_mon, tm.tm_mday))
@@ -3749,8 +3803,8 @@ to_date(PG_FUNCTION_ARGS)
37493803
/*
37503804
* do_to_timestamp: shared code for to_timestamp and to_date
37513805
*
3752-
* Parse the 'date_txt' according to 'fmt', return results as a struct pg_tm
3753-
* and fractional seconds.
3806+
* Parse the 'date_txt' according to 'fmt', return results as a struct pg_tm,
3807+
* fractional seconds, and fractional precision.
37543808
*
37553809
* We parse 'fmt' into a list of FormatNodes, which is then passed to
37563810
* DCH_from_char to populate a TmFromChar with the parsed contents of
@@ -3761,7 +3815,7 @@ to_date(PG_FUNCTION_ARGS)
37613815
*/
37623816
static void
37633817
do_to_timestamp(text *date_txt, text *fmt,
3764-
struct pg_tm *tm, fsec_t *fsec)
3818+
struct pg_tm *tm, fsec_t *fsec, int *fprec)
37653819
{
37663820
FormatNode *format;
37673821
TmFromChar tmfc;
@@ -3817,6 +3871,7 @@ do_to_timestamp(text *date_txt, text *fmt,
38173871
DCH_from_char(format, date_str, &tmfc);
38183872

38193873
pfree(fmt_str);
3874+
38203875
if (!incache)
38213876
pfree(format);
38223877
}
@@ -3998,6 +4053,8 @@ do_to_timestamp(text *date_txt, text *fmt,
39984053
*fsec += tmfc.ms * 1000;
39994054
if (tmfc.us)
40004055
*fsec += tmfc.us;
4056+
if (fprec)
4057+
*fprec = tmfc.ff; /* fractional precision, if specified */
40014058

40024059
/* Range-check date fields according to bit mask computed above */
40034060
if (fmask != 0)

‎src/backend/utils/adt/timestamp.c

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -70,7 +70,6 @@ typedef struct
7070

7171
static TimeOffset time2t(const int hour, const int min, const int sec, const fsec_t fsec);
7272
static Timestamp dt2local(Timestamp dt, int timezone);
73-
static void AdjustTimestampForTypmod(Timestamp *time, int32 typmod);
7473
static void AdjustIntervalForTypmod(Interval *interval, int32 typmod);
7574
static TimestampTz timestamp2timestamptz(Timestamp timestamp);
7675
static Timestamp timestamptz2timestamp(TimestampTz timestamp);
@@ -333,7 +332,7 @@ timestamp_scale(PG_FUNCTION_ARGS)
333332
* AdjustTimestampForTypmod --- round off a timestamp to suit given typmod
334333
* Works for either timestamp or timestamptz.
335334
*/
336-
static void
335+
void
337336
AdjustTimestampForTypmod(Timestamp *time, int32 typmod)
338337
{
339338
static const int64 TimestampScales[MAX_TIMESTAMP_PRECISION + 1] = {

‎src/include/utils/datetime.h

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -336,4 +336,6 @@ extern TimeZoneAbbrevTable *ConvertTimeZoneAbbrevs(struct tzEntry *abbrevs,
336336
int n);
337337
extern void InstallTimeZoneAbbrevs(TimeZoneAbbrevTable *tbl);
338338

339+
extern void AdjustTimestampForTypmod(Timestamp *time, int32 typmod);
340+
339341
#endif /* DATETIME_H */

‎src/test/regress/expected/horology.out

Lines changed: 79 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2786,6 +2786,85 @@ SELECT to_timestamp('2011-12-18 11:38 20', 'YYYY-MM-DD HH12:MI TZM');
27862786
Sun Dec 18 03:18:00 2011 PST
27872787
(1 row)
27882788

2789+
SELECT i, to_timestamp('2018-11-02 12:34:56', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2790+
i | to_timestamp
2791+
---+------------------------------
2792+
1 | Fri Nov 02 12:34:56 2018 PDT
2793+
2 | Fri Nov 02 12:34:56 2018 PDT
2794+
3 | Fri Nov 02 12:34:56 2018 PDT
2795+
4 | Fri Nov 02 12:34:56 2018 PDT
2796+
5 | Fri Nov 02 12:34:56 2018 PDT
2797+
6 | Fri Nov 02 12:34:56 2018 PDT
2798+
(6 rows)
2799+
2800+
SELECT i, to_timestamp('2018-11-02 12:34:56.1', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2801+
i | to_timestamp
2802+
---+--------------------------------
2803+
1 | Fri Nov 02 12:34:56.1 2018 PDT
2804+
2 | Fri Nov 02 12:34:56.1 2018 PDT
2805+
3 | Fri Nov 02 12:34:56.1 2018 PDT
2806+
4 | Fri Nov 02 12:34:56.1 2018 PDT
2807+
5 | Fri Nov 02 12:34:56.1 2018 PDT
2808+
6 | Fri Nov 02 12:34:56.1 2018 PDT
2809+
(6 rows)
2810+
2811+
SELECT i, to_timestamp('2018-11-02 12:34:56.12', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2812+
i | to_timestamp
2813+
---+---------------------------------
2814+
1 | Fri Nov 02 12:34:56.1 2018 PDT
2815+
2 | Fri Nov 02 12:34:56.12 2018 PDT
2816+
3 | Fri Nov 02 12:34:56.12 2018 PDT
2817+
4 | Fri Nov 02 12:34:56.12 2018 PDT
2818+
5 | Fri Nov 02 12:34:56.12 2018 PDT
2819+
6 | Fri Nov 02 12:34:56.12 2018 PDT
2820+
(6 rows)
2821+
2822+
SELECT i, to_timestamp('2018-11-02 12:34:56.123', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2823+
i | to_timestamp
2824+
---+----------------------------------
2825+
1 | Fri Nov 02 12:34:56.1 2018 PDT
2826+
2 | Fri Nov 02 12:34:56.12 2018 PDT
2827+
3 | Fri Nov 02 12:34:56.123 2018 PDT
2828+
4 | Fri Nov 02 12:34:56.123 2018 PDT
2829+
5 | Fri Nov 02 12:34:56.123 2018 PDT
2830+
6 | Fri Nov 02 12:34:56.123 2018 PDT
2831+
(6 rows)
2832+
2833+
SELECT i, to_timestamp('2018-11-02 12:34:56.1234', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2834+
i | to_timestamp
2835+
---+-----------------------------------
2836+
1 | Fri Nov 02 12:34:56.1 2018 PDT
2837+
2 | Fri Nov 02 12:34:56.12 2018 PDT
2838+
3 | Fri Nov 02 12:34:56.123 2018 PDT
2839+
4 | Fri Nov 02 12:34:56.1234 2018 PDT
2840+
5 | Fri Nov 02 12:34:56.1234 2018 PDT
2841+
6 | Fri Nov 02 12:34:56.1234 2018 PDT
2842+
(6 rows)
2843+
2844+
SELECT i, to_timestamp('2018-11-02 12:34:56.12345', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2845+
i | to_timestamp
2846+
---+------------------------------------
2847+
1 | Fri Nov 02 12:34:56.1 2018 PDT
2848+
2 | Fri Nov 02 12:34:56.12 2018 PDT
2849+
3 | Fri Nov 02 12:34:56.123 2018 PDT
2850+
4 | Fri Nov 02 12:34:56.1235 2018 PDT
2851+
5 | Fri Nov 02 12:34:56.12345 2018 PDT
2852+
6 | Fri Nov 02 12:34:56.12345 2018 PDT
2853+
(6 rows)
2854+
2855+
SELECT i, to_timestamp('2018-11-02 12:34:56.123456', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2856+
i | to_timestamp
2857+
---+-------------------------------------
2858+
1 | Fri Nov 02 12:34:56.1 2018 PDT
2859+
2 | Fri Nov 02 12:34:56.12 2018 PDT
2860+
3 | Fri Nov 02 12:34:56.123 2018 PDT
2861+
4 | Fri Nov 02 12:34:56.1235 2018 PDT
2862+
5 | Fri Nov 02 12:34:56.12346 2018 PDT
2863+
6 | Fri Nov 02 12:34:56.123456 2018 PDT
2864+
(6 rows)
2865+
2866+
SELECT i, to_timestamp('2018-11-02 12:34:56.123456789', 'YYYY-MM-DD HH24:MI:SS.FF' || i) FROM generate_series(1, 6) i;
2867+
ERROR: date/time field value out of range: "2018-11-02 12:34:56.123456789"
27892868
--
27902869
-- Check handling of multiple spaces in format and/or input
27912870
--

‎src/test/regress/expected/timestamp.out

Lines changed: 15 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1584,6 +1584,21 @@ SELECT '' AS to_char_11, to_char(d1, 'FMIYYY FMIYY FMIY FMI FMIW FMIDDD FMID')
15841584
| 2001 1 1 1 1 1 1
15851585
(65 rows)
15861586

1587+
SELECT '' AS to_char_12, to_char(d, 'FF1 FF2 FF3 FF4 FF5 FF6 ff1 ff2 ff3 ff4 ff5 ff6 MS US')
1588+
FROM (VALUES
1589+
('2018-11-02 12:34:56'::timestamp),
1590+
('2018-11-02 12:34:56.78'),
1591+
('2018-11-02 12:34:56.78901'),
1592+
('2018-11-02 12:34:56.78901234')
1593+
) d(d);
1594+
to_char_12 | to_char
1595+
------------+--------------------------------------------------------------------
1596+
| 0 00 000 0000 00000 000000 0 00 000 0000 00000 000000 000 000000
1597+
| 7 78 780 7800 78000 780000 7 78 780 7800 78000 780000 780 780000
1598+
| 7 78 789 7890 78901 789010 7 78 789 7890 78901 789010 789 789010
1599+
| 7 78 789 7890 78901 789012 7 78 789 7890 78901 789012 789 789012
1600+
(4 rows)
1601+
15871602
-- timestamp numeric fields constructor
15881603
SELECT make_timestamp(2014,12,28,6,30,45.887);
15891604
make_timestamp

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