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Fix datetime input parsing to accept YYYY-MONTHNAME-DD and related syntaxes,

Browse Source 
which had been unintentionally broken by recent changes to tighten up the
DateStyle rules for all-numeric date input.  Add documentation and
regression tests for this, too.
REL8_0_STABLE
Tom Lane 22 years ago
parent 9ad53b0463
commit 1a908a00b0
4 changed files with 928 additions and 20 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 30
      doc/src/sgml/datatype.sgml
  2. 81
      src/backend/utils/adt/datetime.c
  3. 677
      src/test/regress/expected/date.out
  4. 160
      src/test/regress/sql/date.sql

30
doc/src/sgml/datatype.sgml
Unescape View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.130 2003/11/06 22:21:47 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.131 2003/11/16 20:29:16 tgl Exp $
-->
<chapter id="datatype">
@ -1464,7 +1464,7 @@ SELECT b, char_length(b) FROM test2;
</row>
<row>
<entry>1999-01-08</entry>
<entry>ISO 8601, January 8 in any mode
<entry>ISO 8601; January 8 in any mode
(recommended format)</entry>
</row>
<row>
@ -1484,6 +1484,30 @@ SELECT b, char_length(b) FROM test2;
February 3, 2001 in <literal>YMD</> mode
</entry>
</row>
<row>
<entry>1999-Jan-08</entry>
<entry>January 8 in any mode</entry>
</row>
<row>
<entry>Jan-08-1999</entry>
<entry>January 8 in any mode</entry>
</row>
<row>
<entry>08-Jan-1999</entry>
<entry>January 8 in any mode</entry>
</row>
<row>
<entry>99-Jan-08</entry>
<entry>January 8 in <literal>YMD</> mode, else error</entry>
</row>
<row>
<entry>08-Jan-99</entry>
<entry>January 8, except error in <literal>YMD</> mode</entry>
</row>
<row>
<entry>Jan-08-99</entry>
<entry>January 8, except error in <literal>YMD</> mode</entry>
</row>
<row>
<entry>19990108</entry>
<entry>ISO 8601; January 8, 1999 in any mode</entry>
@ -1625,7 +1649,7 @@ SELECT b, char_length(b) FROM test2;
</row>
<row>
<entry><literal>zulu</literal></entry>
<entry>Military abbreviation for GMT</entry>
<entry>Military abbreviation for UTC</entry>
</row>
<row>
<entry><literal>z</literal></entry>

81
src/backend/utils/adt/datetime.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/datetime.c,v 1.118 2003/09/25 06:58:03 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/datetime.c,v 1.119 2003/11/16 20:29:16 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -25,7 +25,7 @@
#include "utils/guc.h"
static int DecodeNumber(int flen, char *field,
static int DecodeNumber(int flen, char *field, bool haveTextMonth,
int fmask, int *tmask,
struct tm * tm, fsec_t *fsec, int *is2digits);
static int DecodeNumberField(int len, char *str,
@ -924,7 +924,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
int val;
int dterr;
int mer = HR24;
int haveTextMonth = FALSE;
bool haveTextMonth = FALSE;
int is2digits = FALSE;
int bc = FALSE;
@ -1281,7 +1281,8 @@ DecodeDateTime(char **field, int *ftype, int nf,
/* otherwise it is a single date/time field... */
else
{
dterr = DecodeNumber(flen, field[i], fmask,
dterr = DecodeNumber(flen, field[i],
haveTextMonth, fmask,
&tmask, tm,
fsec, &is2digits);
if (dterr)
@ -2032,6 +2033,7 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
else
{
dterr = DecodeNumber(flen, field[i],
FALSE,
(fmask | DTK_DATE_M),
&tmask, tm,
fsec, &is2digits);
@ -2229,6 +2231,7 @@ DecodeDate(char *str, int fmask, int *tmask, struct tm * tm)
int i,
len;
int dterr;
bool haveTextMonth = FALSE;
int bc = FALSE;
int is2digits = FALSE;
int type,
@ -2283,6 +2286,7 @@ DecodeDate(char *str, int fmask, int *tmask, struct tm * tm)
{
case MONTH:
tm->tm_mon = val;
haveTextMonth = TRUE;
break;
case ADBC:
@ -2312,7 +2316,7 @@ DecodeDate(char *str, int fmask, int *tmask, struct tm * tm)
if ((len = strlen(field[i])) <= 0)
return DTERR_BAD_FORMAT;
dterr = DecodeNumber(len, field[i], fmask,
dterr = DecodeNumber(len, field[i], haveTextMonth, fmask,
&dmask, tm,
&fsec, &is2digits);
if (dterr)
@ -2444,7 +2448,7 @@ DecodeTime(char *str, int fmask, int *tmask, struct tm * tm, fsec_t *fsec)
* Return 0 if okay, a DTERR code if not.
*/
static int
DecodeNumber(int flen, char *str, int fmask,
DecodeNumber(int flen, char *str, bool haveTextMonth, int fmask,
int *tmask, struct tm * tm, fsec_t *fsec, int *is2digits)
{
int val;
@ -2534,10 +2538,59 @@ DecodeNumber(int flen, char *str, int fmask,
tm->tm_mon = val;
break;
case (DTK_M(MONTH)):
if (haveTextMonth)
{
/*
* We are at the first numeric field of a date that included
* a textual month name. We want to support the variants
* MON-DD-YYYY, DD-MON-YYYY, and YYYY-MON-DD as unambiguous
* inputs. We will also accept MON-DD-YY or DD-MON-YY in
* either DMY or MDY modes, as well as YY-MON-DD in YMD mode.
*/
if (flen >= 3 || DateOrder == DATEORDER_YMD)
{
*tmask = DTK_M(YEAR);
tm->tm_year = val;
}
else
{
*tmask = DTK_M(DAY);
tm->tm_mday = val;
}
}
else
{
/* Must be at second field of MM-DD-YY */
*tmask = DTK_M(DAY);
tm->tm_mday = val;
}
break;
case (DTK_M(YEAR) | DTK_M(MONTH)):
/* Must be at third field of YY-MM-DD */
*tmask = DTK_M(DAY);
tm->tm_mday = val;
if (haveTextMonth)
{
/* Need to accept DD-MON-YYYY even in YMD mode */
if (flen >= 3 && *is2digits)
{
/* Guess that first numeric field is day was wrong */
*tmask = DTK_M(DAY); /* YEAR is already set */
tm->tm_mday = tm->tm_year;
tm->tm_year = val;
*is2digits = FALSE;
}
else
{
*tmask = DTK_M(DAY);
tm->tm_mday = val;
}
}
else
{
/* Must be at third field of YY-MM-DD */
*tmask = DTK_M(DAY);
tm->tm_mday = val;
}
break;
case (DTK_M(DAY)):
@ -2552,12 +2605,6 @@ DecodeNumber(int flen, char *str, int fmask,
tm->tm_year = val;
break;
case (DTK_M(MONTH)):
/* Must be at second field of MM-DD-YY */
*tmask = DTK_M(DAY);
tm->tm_mday = val;
break;
case (DTK_M(YEAR) | DTK_M(MONTH) | DTK_M(DAY)):
/* we have all the date, so it must be a time field */
dterr = DecodeNumberField(flen, str, fmask,
@ -2574,10 +2621,10 @@ DecodeNumber(int flen, char *str, int fmask,
/*
* When processing a year field, mark it for adjustment if it's
* exactly two digits.
* only one or two digits.
*/
if (*tmask == DTK_M(YEAR))
*is2digits = (flen == 2);
*is2digits = (flen <= 2);
return 0;
}

677
src/test/regress/expected/date.out
Unescape View File

@ -62,6 +62,683 @@ SELECT f1 AS "Three" FROM DATE_TBL
04-03-2000
(3 rows)
--
-- Check all the documented input formats
--
SET datestyle TO iso; -- display results in ISO
SET datestyle TO ymd;
SELECT date 'January 8, 1999';
date
------------
1999-01-08
(1 row)
SELECT date '1999-01-08';
date
------------
1999-01-08
(1 row)
SELECT date '1999-01-18';
date
------------
1999-01-18
(1 row)
SELECT date '1/8/1999';
ERROR: date/time field value out of range: "1/8/1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1/18/1999';
ERROR: date/time field value out of range: "1/18/1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '18/1/1999';
ERROR: date/time field value out of range: "18/1/1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '01/02/03';
date
------------
2001-02-03
(1 row)
SELECT date '19990108';
date
------------
1999-01-08
(1 row)
SELECT date '990108';
date
------------
1999-01-08
(1 row)
SELECT date '1999.008';
date
------------
1999-01-08
(1 row)
SELECT date 'J2451187';
date
------------
1999-01-08
(1 row)
SELECT date 'January 8, 99 BC';
ERROR: date/time field value out of range: "January 8, 99 BC"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '99-Jan-08';
date
------------
1999-01-08
(1 row)
SELECT date '1999-Jan-08';
date
------------
1999-01-08
(1 row)
SELECT date '08-Jan-99';
ERROR: date/time field value out of range: "08-Jan-99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '08-Jan-1999';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan-08-99';
ERROR: date/time field value out of range: "Jan-08-99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date 'Jan-08-1999';
date
------------
1999-01-08
(1 row)
SELECT date '99-08-Jan';
ERROR: invalid input syntax for type date: "99-08-Jan"
SELECT date '1999-08-Jan';
ERROR: invalid input syntax for type date: "1999-08-Jan"
SELECT date '99 Jan 08';
date
------------
1999-01-08
(1 row)
SELECT date '1999 Jan 08';
date
------------
1999-01-08
(1 row)
SELECT date '08 Jan 99';
ERROR: date/time field value out of range: "08 Jan 99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '08 Jan 1999';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan 08 99';
ERROR: date/time field value out of range: "Jan 08 99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date 'Jan 08 1999';
date
------------
1999-01-08
(1 row)
SELECT date '99 08 Jan';
date
------------
1999-01-08
(1 row)
SELECT date '1999 08 Jan';
date
------------
1999-01-08
(1 row)
SELECT date '99-01-08';
date
------------
1999-01-08
(1 row)
SELECT date '1999-01-08';
date
------------
1999-01-08
(1 row)
SELECT date '08-01-99';
ERROR: date/time field value out of range: "08-01-99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '08-01-1999';
ERROR: date/time field value out of range: "08-01-1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '01-08-99';
ERROR: date/time field value out of range: "01-08-99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '01-08-1999';
ERROR: date/time field value out of range: "01-08-1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '99-08-01';
date
------------
1999-08-01
(1 row)
SELECT date '1999-08-01';
date
------------
1999-08-01
(1 row)
SELECT date '99 01 08';
date
------------
1999-01-08
(1 row)
SELECT date '1999 01 08';
date
------------
1999-01-08
(1 row)
SELECT date '08 01 99';
ERROR: date/time field value out of range: "08 01 99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '08 01 1999';
ERROR: date/time field value out of range: "08 01 1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '01 08 99';
ERROR: date/time field value out of range: "01 08 99"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '01 08 1999';
ERROR: date/time field value out of range: "01 08 1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '99 08 01';
date
------------
1999-08-01
(1 row)
SELECT date '1999 08 01';
date
------------
1999-08-01
(1 row)
SET datestyle TO dmy;
SELECT date 'January 8, 1999';
date
------------
1999-01-08
(1 row)
SELECT date '1999-01-08';
date
------------
1999-01-08
(1 row)
SELECT date '1999-01-18';
date
------------
1999-01-18
(1 row)
SELECT date '1/8/1999';
date
------------
1999-08-01
(1 row)
SELECT date '1/18/1999';
ERROR: date/time field value out of range: "1/18/1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '18/1/1999';
date
------------
1999-01-18
(1 row)
SELECT date '01/02/03';
date
------------
2003-02-01
(1 row)
SELECT date '19990108';
date
------------
1999-01-08
(1 row)
SELECT date '990108';
date
------------
1999-01-08
(1 row)
SELECT date '1999.008';
date
------------
1999-01-08
(1 row)
SELECT date 'J2451187';
date
------------
1999-01-08
(1 row)
SELECT date 'January 8, 99 BC';
date
---------------
0099-01-08 BC
(1 row)
SELECT date '99-Jan-08';
ERROR: date/time field value out of range: "99-Jan-08"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999-Jan-08';
date
------------
1999-01-08
(1 row)
SELECT date '08-Jan-99';
date
------------
1999-01-08
(1 row)
SELECT date '08-Jan-1999';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan-08-99';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan-08-1999';
date
------------
1999-01-08
(1 row)
SELECT date '99-08-Jan';
ERROR: invalid input syntax for type date: "99-08-Jan"
SELECT date '1999-08-Jan';
ERROR: invalid input syntax for type date: "1999-08-Jan"
SELECT date '99 Jan 08';
ERROR: date/time field value out of range: "99 Jan 08"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999 Jan 08';
date
------------
1999-01-08
(1 row)
SELECT date '08 Jan 99';
date
------------
1999-01-08
(1 row)
SELECT date '08 Jan 1999';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan 08 99';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan 08 1999';
date
------------
1999-01-08
(1 row)
SELECT date '99 08 Jan';
ERROR: invalid input syntax for type date: "99 08 Jan"
SELECT date '1999 08 Jan';
date
------------
1999-01-08
(1 row)
SELECT date '99-01-08';
ERROR: date/time field value out of range: "99-01-08"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999-01-08';
date
------------
1999-01-08
(1 row)
SELECT date '08-01-99';
date
------------
1999-01-08
(1 row)
SELECT date '08-01-1999';
date
------------
1999-01-08
(1 row)
SELECT date '01-08-99';
date
------------
1999-08-01
(1 row)
SELECT date '01-08-1999';
date
------------
1999-08-01
(1 row)
SELECT date '99-08-01';
ERROR: date/time field value out of range: "99-08-01"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999-08-01';
date
------------
1999-08-01
(1 row)
SELECT date '99 01 08';
ERROR: date/time field value out of range: "99 01 08"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999 01 08';
date
------------
1999-01-08
(1 row)
SELECT date '08 01 99';
date
------------
1999-01-08
(1 row)
SELECT date '08 01 1999';
date
------------
1999-01-08
(1 row)
SELECT date '01 08 99';
date
------------
1999-08-01
(1 row)
SELECT date '01 08 1999';
date
------------
1999-08-01
(1 row)
SELECT date '99 08 01';
ERROR: date/time field value out of range: "99 08 01"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999 08 01';
date
------------
1999-08-01
(1 row)
SET datestyle TO mdy;
SELECT date 'January 8, 1999';
date
------------
1999-01-08
(1 row)
SELECT date '1999-01-08';
date
------------
1999-01-08
(1 row)
SELECT date '1999-01-18';
date
------------
1999-01-18
(1 row)
SELECT date '1/8/1999';
date
------------
1999-01-08
(1 row)
SELECT date '1/18/1999';
date
------------
1999-01-18
(1 row)
SELECT date '18/1/1999';
ERROR: date/time field value out of range: "18/1/1999"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '01/02/03';
date
------------
2003-01-02
(1 row)
SELECT date '19990108';
date
------------
1999-01-08
(1 row)
SELECT date '990108';
date
------------
1999-01-08
(1 row)
SELECT date '1999.008';
date
------------
1999-01-08
(1 row)
SELECT date 'J2451187';
date
------------
1999-01-08
(1 row)
SELECT date 'January 8, 99 BC';
date
---------------
0099-01-08 BC
(1 row)
SELECT date '99-Jan-08';
ERROR: date/time field value out of range: "99-Jan-08"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999-Jan-08';
date
------------
1999-01-08
(1 row)
SELECT date '08-Jan-99';
date
------------
1999-01-08
(1 row)
SELECT date '08-Jan-1999';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan-08-99';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan-08-1999';
date
------------
1999-01-08
(1 row)
SELECT date '99-08-Jan';
ERROR: invalid input syntax for type date: "99-08-Jan"
SELECT date '1999-08-Jan';
ERROR: invalid input syntax for type date: "1999-08-Jan"
SELECT date '99 Jan 08';
ERROR: invalid input syntax for type date: "99 Jan 08"
SELECT date '1999 Jan 08';
date
------------
1999-01-08
(1 row)
SELECT date '08 Jan 99';
date
------------
1999-01-08
(1 row)
SELECT date '08 Jan 1999';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan 08 99';
date
------------
1999-01-08
(1 row)
SELECT date 'Jan 08 1999';
date
------------
1999-01-08
(1 row)
SELECT date '99 08 Jan';
ERROR: invalid input syntax for type date: "99 08 Jan"
SELECT date '1999 08 Jan';
date
------------
1999-01-08
(1 row)
SELECT date '99-01-08';
ERROR: date/time field value out of range: "99-01-08"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999-01-08';
date
------------
1999-01-08
(1 row)
SELECT date '08-01-99';
date
------------
1999-08-01
(1 row)
SELECT date '08-01-1999';
date
------------
1999-08-01
(1 row)
SELECT date '01-08-99';
date
------------
1999-01-08
(1 row)
SELECT date '01-08-1999';
date
------------
1999-01-08
(1 row)
SELECT date '99-08-01';
ERROR: date/time field value out of range: "99-08-01"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999-08-01';
date
------------
1999-08-01
(1 row)
SELECT date '99 01 08';
ERROR: date/time field value out of range: "99 01 08"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999 01 08';
date
------------
1999-01-08
(1 row)
SELECT date '08 01 99';
date
------------
1999-08-01
(1 row)
SELECT date '08 01 1999';
date
------------
1999-08-01
(1 row)
SELECT date '01 08 99';
date
------------
1999-01-08
(1 row)
SELECT date '01 08 1999';
date
------------
1999-01-08
(1 row)
SELECT date '99 08 01';
ERROR: date/time field value out of range: "99 08 01"
HINT: Perhaps you need a different "datestyle" setting.
SELECT date '1999 08 01';
date
------------
1999-08-01
(1 row)
RESET datestyle;
--
-- Simple math
-- Leave most of it for the horology tests

160
src/test/regress/sql/date.sql
Unescape View File

@ -28,6 +28,166 @@ SELECT f1 AS "Nine" FROM DATE_TBL WHERE f1 < '2000-01-01';
SELECT f1 AS "Three" FROM DATE_TBL
WHERE f1 BETWEEN '2000-01-01' AND '2001-01-01';
--
-- Check all the documented input formats
--
SET datestyle TO iso; -- display results in ISO
SET datestyle TO ymd;
SELECT date 'January 8, 1999';
SELECT date '1999-01-08';
SELECT date '1999-01-18';
SELECT date '1/8/1999';
SELECT date '1/18/1999';
SELECT date '18/1/1999';
SELECT date '01/02/03';
SELECT date '19990108';
SELECT date '990108';
SELECT date '1999.008';
SELECT date 'J2451187';
SELECT date 'January 8, 99 BC';
SELECT date '99-Jan-08';
SELECT date '1999-Jan-08';
SELECT date '08-Jan-99';
SELECT date '08-Jan-1999';
SELECT date 'Jan-08-99';
SELECT date 'Jan-08-1999';
SELECT date '99-08-Jan';
SELECT date '1999-08-Jan';
SELECT date '99 Jan 08';
SELECT date '1999 Jan 08';
SELECT date '08 Jan 99';
SELECT date '08 Jan 1999';
SELECT date 'Jan 08 99';
SELECT date 'Jan 08 1999';
SELECT date '99 08 Jan';
SELECT date '1999 08 Jan';
SELECT date '99-01-08';
SELECT date '1999-01-08';
SELECT date '08-01-99';
SELECT date '08-01-1999';
SELECT date '01-08-99';
SELECT date '01-08-1999';
SELECT date '99-08-01';
SELECT date '1999-08-01';
SELECT date '99 01 08';
SELECT date '1999 01 08';
SELECT date '08 01 99';
SELECT date '08 01 1999';
SELECT date '01 08 99';
SELECT date '01 08 1999';
SELECT date '99 08 01';
SELECT date '1999 08 01';
SET datestyle TO dmy;
SELECT date 'January 8, 1999';
SELECT date '1999-01-08';
SELECT date '1999-01-18';
SELECT date '1/8/1999';
SELECT date '1/18/1999';
SELECT date '18/1/1999';
SELECT date '01/02/03';
SELECT date '19990108';
SELECT date '990108';
SELECT date '1999.008';
SELECT date 'J2451187';
SELECT date 'January 8, 99 BC';
SELECT date '99-Jan-08';
SELECT date '1999-Jan-08';
SELECT date '08-Jan-99';
SELECT date '08-Jan-1999';
SELECT date 'Jan-08-99';
SELECT date 'Jan-08-1999';
SELECT date '99-08-Jan';
SELECT date '1999-08-Jan';
SELECT date '99 Jan 08';
SELECT date '1999 Jan 08';
SELECT date '08 Jan 99';
SELECT date '08 Jan 1999';
SELECT date 'Jan 08 99';
SELECT date 'Jan 08 1999';
SELECT date '99 08 Jan';
SELECT date '1999 08 Jan';
SELECT date '99-01-08';
SELECT date '1999-01-08';
SELECT date '08-01-99';
SELECT date '08-01-1999';
SELECT date '01-08-99';
SELECT date '01-08-1999';
SELECT date '99-08-01';
SELECT date '1999-08-01';
SELECT date '99 01 08';
SELECT date '1999 01 08';
SELECT date '08 01 99';
SELECT date '08 01 1999';
SELECT date '01 08 99';
SELECT date '01 08 1999';
SELECT date '99 08 01';
SELECT date '1999 08 01';
SET datestyle TO mdy;
SELECT date 'January 8, 1999';
SELECT date '1999-01-08';
SELECT date '1999-01-18';
SELECT date '1/8/1999';
SELECT date '1/18/1999';
SELECT date '18/1/1999';
SELECT date '01/02/03';
SELECT date '19990108';
SELECT date '990108';
SELECT date '1999.008';
SELECT date 'J2451187';
SELECT date 'January 8, 99 BC';
SELECT date '99-Jan-08';
SELECT date '1999-Jan-08';
SELECT date '08-Jan-99';
SELECT date '08-Jan-1999';
SELECT date 'Jan-08-99';
SELECT date 'Jan-08-1999';
SELECT date '99-08-Jan';
SELECT date '1999-08-Jan';
SELECT date '99 Jan 08';
SELECT date '1999 Jan 08';
SELECT date '08 Jan 99';
SELECT date '08 Jan 1999';
SELECT date 'Jan 08 99';
SELECT date 'Jan 08 1999';
SELECT date '99 08 Jan';
SELECT date '1999 08 Jan';
SELECT date '99-01-08';
SELECT date '1999-01-08';
SELECT date '08-01-99';
SELECT date '08-01-1999';
SELECT date '01-08-99';
SELECT date '01-08-1999';
SELECT date '99-08-01';
SELECT date '1999-08-01';
SELECT date '99 01 08';
SELECT date '1999 01 08';
SELECT date '08 01 99';
SELECT date '08 01 1999';
SELECT date '01 08 99';
SELECT date '01 08 1999';
SELECT date '99 08 01';
SELECT date '1999 08 01';
RESET datestyle;
--
-- Simple math
-- Leave most of it for the horology tests

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