# 2003 October 31
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing date and time functions.
#
# $Id: date.test,v 1.34 2009/04/16 12:58:03 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Do not use a codec for tests in this file, as the database file is
# manipulated directly using tcl scripts (using the [hexio_write] command).
#
do_not_use_codec

# Skip this whole file if date and time functions are omitted
# at compile-time
#
ifcapable {!datetime} {
  finish_test
  return
}

proc datetest {tnum expr result} {
  do_test date-$tnum [subst {
    execsql "SELECT coalesce($expr,'NULL')"
  }] [list $result]
}
set tcl_precision 15
datetest 1.1 julianday('2000-01-01') 2451544.5
datetest 1.2 julianday('1970-01-01') 2440587.5
datetest 1.3 julianday('1910-04-20') 2418781.5
datetest 1.4 julianday('1986-02-09') 2446470.5
datetest 1.5 julianday('12:00:00') 2451545.0
datetest 1.6 {julianday('2000-01-01 12:00:00')} 2451545.0
datetest 1.7 {julianday('2000-01-01 12:00')} 2451545.0
datetest 1.8 julianday('bogus') NULL
datetest 1.9 julianday('1999-12-31') 2451543.5
datetest 1.10 julianday('1999-12-32') NULL
datetest 1.11 julianday('1999-13-01') NULL
datetest 1.12 julianday('2003-02-31') 2452701.5
datetest 1.13 julianday('2003-03-03') 2452701.5
datetest 1.14 julianday('+2000-01-01') NULL
datetest 1.15 julianday('200-01-01') NULL
datetest 1.16 julianday('2000-1-01') NULL
datetest 1.17 julianday('2000-01-1') NULL
datetest 1.18.1 {julianday('2000-01-01     12:00:00')} 2451545.0
datetest 1.18.2 {julianday('2000-01-01T12:00:00')} 2451545.0
datetest 1.18.3 {julianday('2000-01-01 T12:00:00')} 2451545.0
datetest 1.18.4 {julianday('2000-01-01T 12:00:00')} 2451545.0
datetest 1.18.4 {julianday('2000-01-01 T 12:00:00')} 2451545.0
datetest 1.19 {julianday('2000-01-01 12:00:00.1')}   2451545.00000116
datetest 1.20 {julianday('2000-01-01 12:00:00.01')}  2451545.00000012
datetest 1.21 {julianday('2000-01-01 12:00:00.001')} 2451545.00000001
datetest 1.22 {julianday('2000-01-01 12:00:00.')} NULL
datetest 1.23 julianday(12345.6) 12345.6
datetest 1.23b julianday(1721059.5) 1721059.5
datetest 1.24 {julianday('2001-01-01 12:00:00 bogus')} NULL
datetest 1.25 {julianday('2001-01-01 bogus')} NULL
datetest 1.26 {julianday('2001-01-01 12:60:00')} NULL
datetest 1.27 {julianday('2001-01-01 12:59:60')} NULL
datetest 1.28 {julianday('2001-00-01')} NULL
datetest 1.29 {julianday('2001-01-00')} NULL

datetest 2.1 datetime(0,'unixepoch') {1970-01-01 00:00:00}
datetest 2.1b datetime(0,'unixepoc') NULL
datetest 2.1c datetime(0,'unixepochx') NULL
datetest 2.1d datetime('2003-10-22','unixepoch') NULL
datetest 2.2 datetime(946684800,'unixepoch') {2000-01-01 00:00:00}
datetest 2.2b datetime('946684800','unixepoch') {2000-01-01 00:00:00}
for {set i 0} {$i<1000} {incr i} {
  set sql [format {strftime('%%H:%%M:%%f',1237962480.%03d,'unixepoch')} $i]
  set res [format {06:28:00.%03d} $i]
  datetest 2.2c-$i $sql $res
}
datetest 2.3 {date('2003-10-22','weekday 0')} 2003-10-26
datetest 2.4 {date('2003-10-22','weekday 1')} 2003-10-27
datetest 2.4a {date('2003-10-22','weekday  1')} 2003-10-27
datetest 2.4b {date('2003-10-22','weekday  1x')} NULL
datetest 2.4c {date('2003-10-22','weekday  -1')} NULL
datetest 2.4d {date('2003-10-22','weakday  1x')} NULL
datetest 2.4e {date('2003-10-22','weekday ')} NULL
datetest 2.5 {date('2003-10-22','weekday 2')} 2003-10-28
datetest 2.6 {date('2003-10-22','weekday 3')} 2003-10-22
datetest 2.7 {date('2003-10-22','weekday 4')} 2003-10-23
datetest 2.8 {date('2003-10-22','weekday 5')} 2003-10-24
datetest 2.9 {date('2003-10-22','weekday 6')} 2003-10-25
datetest 2.10 {date('2003-10-22','weekday 7')} NULL
datetest 2.11 {date('2003-10-22','weekday 5.5')} NULL
datetest 2.12 {datetime('2003-10-22 12:34','weekday 0')} {2003-10-26 12:34:00}
datetest 2.13 {datetime('2003-10-22 12:34','start of month')} \
   {2003-10-01 00:00:00}
datetest 2.14 {datetime('2003-10-22 12:34','start of year')} \
   {2003-01-01 00:00:00}
datetest 2.15 {datetime('2003-10-22 12:34','start of day')} \
   {2003-10-22 00:00:00}
datetest 2.15a {datetime('2003-10-22 12:34','start of')} NULL
datetest 2.15b {datetime('2003-10-22 12:34','start of bogus')} NULL
datetest 2.16 time('12:34:56.43') 12:34:56
datetest 2.17 {datetime('2003-10-22 12:34','1 day')} {2003-10-23 12:34:00}
datetest 2.18 {datetime('2003-10-22 12:34','+1 day')} {2003-10-23 12:34:00}
datetest 2.19 {datetime('2003-10-22 12:34','+1.25 day')} {2003-10-23 18:34:00}
datetest 2.20 {datetime('2003-10-22 12:34','-1.0 day')} {2003-10-21 12:34:00}
datetest 2.21 {datetime('2003-10-22 12:34','1 month')} {2003-11-22 12:34:00}
datetest 2.22 {datetime('2003-10-22 12:34','11 month')} {2004-09-22 12:34:00}
datetest 2.23 {datetime('2003-10-22 12:34','-13 month')} {2002-09-22 12:34:00}
datetest 2.24 {datetime('2003-10-22 12:34','1.5 months')} {2003-12-07 12:34:00}
datetest 2.25 {datetime('2003-10-22 12:34','-5 years')} {1998-10-22 12:34:00}
datetest 2.26 {datetime('2003-10-22 12:34','+10.5 minutes')} \
  {2003-10-22 12:44:30}
datetest 2.27 {datetime('2003-10-22 12:34','-1.25 hours')} \
  {2003-10-22 11:19:00}
datetest 2.28 {datetime('2003-10-22 12:34','11.25 seconds')} \
  {2003-10-22 12:34:11}
datetest 2.29 {datetime('2003-10-22 12:24','+5 bogus')} NULL
datetest 2.30 {datetime('2003-10-22 12:24','+++')} NULL
datetest 2.31 {datetime('2003-10-22 12:24','+12.3e4 femtoseconds')} NULL
datetest 2.32 {datetime('2003-10-22 12:24','+12.3e4 uS')} NULL
datetest 2.33 {datetime('2003-10-22 12:24','+1 abc')} NULL
datetest 2.34 {datetime('2003-10-22 12:24','+1 abcd')} NULL
datetest 2.35 {datetime('2003-10-22 12:24','+1 abcde')} NULL
datetest 2.36 {datetime('2003-10-22 12:24','+1 abcdef')} NULL
datetest 2.37 {datetime('2003-10-22 12:24','+1 abcdefg')} NULL
datetest 2.38 {datetime('2003-10-22 12:24','+1 abcdefgh')} NULL
datetest 2.39 {datetime('2003-10-22 12:24','+1 abcdefghi')} NULL
set sqlite_current_time 1199243045
datetest 2.40 {datetime()} {2008-01-02 03:04:05}
set sqlite_current_time 0
datetest 2.41 {datetime('2003-10-22 12:24','23 seconds')} {2003-10-22 12:24:23}
datetest 2.42 {datetime('2003-10-22 12:24','345 second')} {2003-10-22 12:29:45}
datetest 2.43 {datetime('2003-10-22 12:24','4 second')} {2003-10-22 12:24:04}
datetest 2.44 {datetime('2003-10-22 12:24','56 second')} {2003-10-22 12:24:56}
datetest 2.45 {datetime('2003-10-22 12:24','60 second')} {2003-10-22 12:25:00}
datetest 2.46 {datetime('2003-10-22 12:24','70 second')} {2003-10-22 12:25:10}
datetest 2.47 {datetime('2003-10-22 12:24','8.6 seconds')} {2003-10-22 12:24:08}
datetest 2.48 {datetime('2003-10-22 12:24','9.4 second')} {2003-10-22 12:24:09}
datetest 2.49 {datetime('2003-10-22 12:24','0000 second')} {2003-10-22 12:24:00}
datetest 2.50 {datetime('2003-10-22 12:24','0001 second')} {2003-10-22 12:24:01}
datetest 2.51 {datetime('2003-10-22 12:24','nonsense')} NULL

datetest 2.60 {datetime('2023-02-31')} {2023-03-03 00:00:00}

datetest 3.1 {strftime('%d','2003-10-31 12:34:56.432')} 31
datetest 3.2.1 {strftime('pre%fpost','2003-10-31 12:34:56.432')} pre56.432post
datetest 3.2.2 {strftime('%f','2003-10-31 12:34:59.9999999')} 59.999
datetest 3.3 {strftime('%H','2003-10-31 12:34:56.432')} 12
datetest 3.4 {strftime('%j','2003-10-31 12:34:56.432')} 304
datetest 3.5 {strftime('%J','2003-10-31 12:34:56.432')} 2452944.024264259
datetest 3.6 {strftime('%m','2003-10-31 12:34:56.432')} 10
datetest 3.7 {strftime('%M','2003-10-31 12:34:56.432')} 34
datetest 3.8.1 {strftime('%s','2003-10-31 12:34:56.432')} 1067603696
datetest 3.8.2 {strftime('%s','2038-01-19 03:14:07')} 2147483647
datetest 3.8.3 {strftime('%s','2038-01-19 03:14:08')} 2147483648
datetest 3.8.4 {strftime('%s','2201-04-09 12:00:00')} 7298164800
datetest 3.8.5 {strftime('%s','9999-12-31 23:59:59')} 253402300799
datetest 3.8.6 {strftime('%s','1969-12-31 23:59:59')} -1
datetest 3.8.7 {strftime('%s','1901-12-13 20:45:52')} -2147483648
datetest 3.8.8 {strftime('%s','1901-12-13 20:45:51')} -2147483649
datetest 3.8.9 {strftime('%s','1776-07-04 00:00:00')} -6106060800
datetest 3.9 {strftime('%S','2003-10-31 12:34:56.432')} 56
datetest 3.10 {strftime('%w','2003-10-31 12:34:56.432')} 5
datetest 3.11.1 {strftime('%W','2003-10-31 12:34:56.432')} 43
datetest 3.11.2 {strftime('%W','2004-01-01')} 00
datetest 3.11.3 {strftime('%W','2004-01-02')} 00
datetest 3.11.4 {strftime('%W','2004-01-03')} 00
datetest 3.11.5 {strftime('abc%Wxyz','2004-01-04')} abc00xyz
datetest 3.11.6 {strftime('%W','2004-01-05')} 01
datetest 3.11.7 {strftime('%W','2004-01-06')} 01
datetest 3.11.8 {strftime('%W','2004-01-07')} 01
datetest 3.11.9 {strftime('%W','2004-01-08')} 01
datetest 3.11.10 {strftime('%W','2004-01-09')} 01
datetest 3.11.11 {strftime('%W','2004-07-18')} 28
datetest 3.11.12 {strftime('%W','2004-12-31')} 52
datetest 3.11.13 {strftime('%W','2007-12-31')} 53
datetest 3.11.14 {strftime('%W','2007-01-01')} 01
datetest 3.11.15 {strftime('%W %j',2454109.04140970)} {02 008}
datetest 3.11.16 {strftime('%W %j',2454109.04140971)} {02 008}
datetest 3.11.17 {strftime('%W %j',2454109.04140972)} {02 008}
datetest 3.11.18 {strftime('%W %j',2454109.04140973)} {02 008}
datetest 3.11.19 {strftime('%W %j',2454109.04140974)} {02 008}
datetest 3.11.20 {strftime('%W %j',2454109.04140975)} {02 008}
datetest 3.11.21 {strftime('%W %j',2454109.04140976)} {02 008}
datetest 3.11.22 {strftime('%W %j',2454109.04140977)} {02 008}
datetest 3.11.23 {strftime('%W %j',2454109.04140978)} {02 008}
datetest 3.11.24 {strftime('%W %j',2454109.04140979)} {02 008}
datetest 3.11.25 {strftime('%W %j',2454109.04140980)} {02 008}
datetest 3.11.99 {strftime('%W %j','2454109.04140970')} {02 008}
datetest 3.12 {strftime('%Y','2003-10-31 12:34:56.432')} 2003
datetest 3.13 {strftime('%%','2003-10-31 12:34:56.432')} %
datetest 3.14 {strftime('%_','2003-10-31 12:34:56.432')} NULL
datetest 3.15 {strftime('%Y-%m-%d','2003-10-31')} 2003-10-31
proc repeat {n txt} {
  set x {} 
  while {$n>0} {
    append x $txt
    incr n -1
  }
  return $x
}
datetest 3.16 "strftime('[repeat 200 %Y]','2003-10-31')" [repeat 200 2003]
datetest 3.17 "strftime('[repeat 200 abc%m123]','2003-10-31')" \
    [repeat 200 abc10123]

foreach c {a b c g h i n o q r t v x y z
           A B C D E G K L N O Q V Z
           0 1 2 3 4 5 6 6 7 9 _} {
  datetest 3.18.$c "strftime('%$c','2003-10-31')" NULL
}
datetest 3.20 {strftime('%e','2023-08-09')} { 9}
datetest 3.21 {strftime('%F %T','2023-08-09 01:23')} {2023-08-09 01:23:00}
datetest 3.22 {strftime('%k','2023-08-09 04:59:59')} { 4}
datetest 3.23 {strftime('%I%P','2023-08-09 11:59:59')} {11am}
datetest 3.24 {strftime('%I%p','2023-08-09 12:00:00')} {12PM}
datetest 3.25 {strftime('%I%P','2023-08-09 12:59:59.9')} {12pm}
datetest 3.26 {strftime('%I%p','2023-08-09 13:00:00')} {01PM}
datetest 3.27 {strftime('%I%P','2023-08-09 23:59:59')} {11pm}
datetest 3.28 {strftime('%I%p','2023-08-09 00:00:00')} {12AM}
datetest 3.29 {strftime('%l:%M%P','2023-08-09 13:00:00')} { 1:00pm}
datetest 3.30 {strftime('%F %R','2023-08-09 12:34:56')} {2023-08-09 12:34}
datetest 3.31 {strftime('%w %u','2023-01-01')} {0 7}
datetest 3.32 {strftime('%w %u','2023-01-02')} {1 1}
datetest 3.33 {strftime('%w %u','2023-01-03')} {2 2}
datetest 3.34 {strftime('%w %u','2023-01-04')} {3 3}
datetest 3.35 {strftime('%w %u','2023-01-05')} {4 4}
datetest 3.36 {strftime('%w %u','2023-01-06')} {5 5}
datetest 3.37 {strftime('%w %u','2023-01-07')} {6 6}

# Ticket #2276.  Make sure leading zeros are inserted where appropriate.
#
datetest 3.40 \
   {strftime('%d/%f/%H/%W/%j/%m/%M/%S/%Y','0421-01-02 03:04:05.006')} \
   02/05.006/03/00/002/01/04/05/0421

set sqlite_current_time 1157124367
datetest 4.1 {date('now')} {2006-09-01}
set sqlite_current_time 0

datetest 5.1 {datetime('1994-04-16 14:00:00 +05:00')} {1994-04-16 09:00:00}
datetest 5.2 {datetime('1994-04-16 14:00:00 -05:15')} {1994-04-16 19:15:00}
datetest 5.3 {datetime('1994-04-16 05:00:00 +08:30')} {1994-04-15 20:30:00}
datetest 5.4 {datetime('1994-04-16 14:00:00 -11:55')} {1994-04-17 01:55:00}
datetest 5.5 {datetime('1994-04-16 14:00:00 -11:60')} NULL
datetest 5.6 {datetime('1994-04-16 14:00:00 -11:55  ')} {1994-04-17 01:55:00}
datetest 5.7 {datetime('1994-04-16 14:00:00 -11:55 x')} NULL
datetest 5.8 {datetime('1994-04-16T14:00:00Z')} {1994-04-16 14:00:00}
datetest 5.9 {datetime('1994-04-16 14:00:00z')} {1994-04-16 14:00:00}
datetest 5.10 {datetime('1994-04-16 14:00:00 Z')} {1994-04-16 14:00:00}
datetest 5.11 {datetime('1994-04-16 14:00:00z    ')} {1994-04-16 14:00:00}
datetest 5.12 {datetime('1994-04-16 14:00:00     z    ')} {1994-04-16 14:00:00}
datetest 5.13 {datetime('1994-04-16 14:00:00Zulu')} NULL
datetest 5.14 {datetime('1994-04-16 14:00:00Z +05:00')} NULL
datetest 5.15 {datetime('1994-04-16 14:00:00 +05:00 Z')} NULL

# localtime->utc and utc->localtime conversions.
#
# Use SQLITE_TESTCTRL_LOCALTIME_FAULT=2 to set an alternative localtime_r()
# implementation that is not locale-dependent.  This testing localtime_r()
# operates as follows:
#
#     (1)  Localtime is 30 minutes earlier than (west of) UTC on
#          even days (counting from 1970-01-01)
#
#     (2)  Localtime is 30 minutes later than (east of) UTC on odd days.
#
#     (3)  The function fails for the specific date/time value
#          of 2000-05-29 14:16:00 in order to test the ability of
#          SQLite to deal with localtime_r() failures.
#
proc local_to_utc {tn utc local} {
  do_execsql_test date-$tn "SELECT datetime('$utc','localtime')" [list $local]
}
proc utc_to_local {tn local utc} {
  do_execsql_test date-$tn "SELECT datetime('$local','utc')" [list $utc]
}

sqlite3_test_control SQLITE_TESTCTRL_LOCALTIME_FAULT 2
local_to_utc 6.1  {2000-10-29 12:00:00} {2000-10-29 12:30:00}
utc_to_local 6.2  {2000-10-29 12:30:00} {2000-10-29 12:00:00}
local_to_utc 6.3  {2000-10-30 12:00:00} {2000-10-30 11:30:00}
utc_to_local 6.4  {2000-10-30 11:30:00} {2000-10-30 12:00:00}

local_to_utc 6.5  {2000-10-28 23:59:59} {2000-10-28 23:29:59}
local_to_utc 6.6  {2000-10-29 00:00:00} {2000-10-29 00:30:00}

# The previous two cases establish that no such localtime as
# 2000-10-29 00:10:00 exists.  Verify that we get a reasonable
# answer if we try to convert this non-existant localtime to utc?
#
utc_to_local 6.7  {2000-10-29 00:10:00} {2000-10-28 23:40:00}

local_to_utc 6.8  {2022-02-10 23:59:59} {2022-02-11 00:29:59}
local_to_utc 6.9  {2022-02-11 00:00:00} {2022-02-10 23:30:00}
local_to_utc 6.10 {2022-02-10 23:45:00} {2022-02-11 00:15:00}
local_to_utc 6.11 {2022-02-11 00:45:00} {2022-02-11 00:15:00}

# The previous two cases show that two different UTC values give
# the same localtime of 2022-02-11 00:15:00.  When converting from
# that localtime back to UTC, we should get one or the other of
# the two UTC values.
#
utc_to_local 6.12 {2022-02-11 00:15:00} {2022-02-11 00:45:00}

# If localtime_r() fails, the datetime() SQL function should raise an error
#
do_catchsql_test date-6.20 {
  SELECT datetime('2000-05-29 14:16:00','localtime');
} {1 {local time unavailable}}

# Modifiers work for dates that are way out of band for localtime_r()
#
local_to_utc 6.21 {1800-10-29 12:00:00} {1800-10-29 12:30:00}
utc_to_local 6.22 {1800-10-29 12:30:00} {1800-10-29 12:00:00}
local_to_utc 6.23 {3000-10-30 12:00:00} {3000-10-30 11:30:00}
utc_to_local 6.24 {3000-10-30 11:30:00} {3000-10-30 12:00:00}

# Restore the use of the OS localtime_r() before going on...
sqlite3_test_control SQLITE_TESTCTRL_LOCALTIME_FAULT 0

# Date-time functions that contain NULL arguments return a NULL
# result.
#
datetest 7.1 {datetime(null)} NULL
datetest 7.2 {datetime('now',null)} NULL
datetest 7.3 {datetime('now','localtime',null)} NULL
datetest 7.4 {time(null)} NULL
datetest 7.5 {time('now',null)} NULL
datetest 7.6 {time('now','localtime',null)} NULL
datetest 7.7 {date(null)} NULL
datetest 7.8 {date('now',null)} NULL
datetest 7.9 {date('now','localtime',null)} NULL
datetest 7.10 {julianday(null)} NULL
datetest 7.11 {julianday('now',null)} NULL
datetest 7.12 {julianday('now','localtime',null)} NULL
datetest 7.13 {strftime(null,'now')} NULL
datetest 7.14 {strftime('%s',null)} NULL
datetest 7.15 {strftime('%s','now',null)} NULL
datetest 7.16 {strftime('%s','now','localtime',null)} NULL

# Test modifiers when the date begins as a julian day number - to
# make sure the HH:MM:SS is preserved.  Ticket #551.
#
set sqlite_current_time [db eval {SELECT strftime('%s','2003-10-22 12:34:00')}]
datetest 8.1 {datetime('now','weekday 0')} {2003-10-26 12:34:00}
datetest 8.2 {datetime('now','weekday 1')} {2003-10-27 12:34:00}
datetest 8.3 {datetime('now','weekday 2')} {2003-10-28 12:34:00}
datetest 8.4 {datetime('now','weekday 3')} {2003-10-22 12:34:00}
datetest 8.5 {datetime('now','start of month')} {2003-10-01 00:00:00}
datetest 8.6 {datetime('now','start of year')} {2003-01-01 00:00:00}
datetest 8.7 {datetime('now','start of day')} {2003-10-22 00:00:00}
datetest 8.8 {datetime('now','1 day')} {2003-10-23 12:34:00}
datetest 8.9 {datetime('now','+1 day')} {2003-10-23 12:34:00}
datetest 8.10 {datetime('now','+1.25 day')} {2003-10-23 18:34:00}
datetest 8.11 {datetime('now','-1.0 day')} {2003-10-21 12:34:00}
datetest 8.12 {datetime('now','1 month')} {2003-11-22 12:34:00}
datetest 8.13 {datetime('now','11 month')} {2004-09-22 12:34:00}
datetest 8.14 {datetime('now','-13 month')} {2002-09-22 12:34:00}
datetest 8.15 {datetime('now','1.5 months')} {2003-12-07 12:34:00}
datetest 8.16 {datetime('now','-5 years')} {1998-10-22 12:34:00}
datetest 8.17 {datetime('now','+10.5 minutes')} {2003-10-22 12:44:30}
datetest 8.18 {datetime('now','-1.25 hours')} {2003-10-22 11:19:00}
datetest 8.19 {datetime('now','11.25 seconds')} {2003-10-22 12:34:11}
datetest 8.90 {datetime('now','abcdefghijklmnopqrstuvwyxzABCDEFGHIJLMNOP')} NULL
set sqlite_current_time 0

# Negative years work.  Example:  '-4713-11-26' is JD 1.5.
#
datetest 9.1 {julianday('-4713-11-24 12:00:00')} {0.0}
datetest 9.2 {julianday(datetime(5))} {5.0}
datetest 9.3 {julianday(datetime(10))} {10.0}
datetest 9.4 {julianday(datetime(100))} {100.0}
datetest 9.5 {julianday(datetime(1000))} {1000.0}
datetest 9.6 {julianday(datetime(10000))} {10000.0}
datetest 9.7 {julianday(datetime(100000))} {100000.0}

# datetime() with just an HH:MM:SS correctly inserts the date 2000-01-01.
#
datetest 10.1 {datetime('01:02:03')}  {2000-01-01 01:02:03}
datetest 10.2 {date('01:02:03')}  {2000-01-01}
datetest 10.3 {strftime('%Y-%m-%d %H:%M','01:02:03')} {2000-01-01 01:02}

# Test the new HH:MM:SS modifier
#
datetest 11.1 {datetime('2004-02-28 20:00:00', '-01:20:30')} \
   {2004-02-28 18:39:30}
datetest 11.2 {datetime('2004-02-28 20:00:00', '+12:30:00')} \
   {2004-02-29 08:30:00}
datetest 11.3 {datetime('2004-02-28 20:00:00', '+12:30')} \
   {2004-02-29 08:30:00}
datetest 11.4 {datetime('2004-02-28 20:00:00', '12:30')} \
   {2004-02-29 08:30:00}
datetest 11.5 {datetime('2004-02-28 20:00:00', '-12:00')} \
   {2004-02-28 08:00:00}
datetest 11.6 {datetime('2004-02-28 20:00:00', '-12:01')} \
   {2004-02-28 07:59:00}
datetest 11.7 {datetime('2004-02-28 20:00:00', '-11:59')} \
   {2004-02-28 08:01:00}
datetest 11.8 {datetime('2004-02-28 20:00:00', '11:59')} \
   {2004-02-29 07:59:00}
datetest 11.9 {datetime('2004-02-28 20:00:00', '12:01')} \
   {2004-02-29 08:01:00}
datetest 11.10 {datetime('2004-02-28 20:00:00', '12:60')} NULL

# Ticket #1964
datetest 12.1 {datetime('2005-09-01')} {2005-09-01 00:00:00}
datetest 12.2 {datetime('2005-09-01','+0 hours')} {2005-09-01 00:00:00}

# Ticket #1991
do_test date-13.1 {
  execsql {
    SELECT strftime('%Y-%m-%d %H:%M:%f', julianday('2006-09-24T10:50:26.047'))
  }
} {{2006-09-24 10:50:26.047}}

# Ticket #2153
datetest 13.2 {strftime('%Y-%m-%d %H:%M:%S', '2007-01-01 12:34:59.6')} \
  {2007-01-01 12:34:59}
datetest 13.3 {strftime('%Y-%m-%d %H:%M:%f', '2007-01-01 12:34:59.6')} \
  {2007-01-01 12:34:59.600}
datetest 13.4 {strftime('%Y-%m-%d %H:%M:%S', '2007-01-01 12:59:59.6')} \
  {2007-01-01 12:59:59}
datetest 13.5 {strftime('%Y-%m-%d %H:%M:%f', '2007-01-01 12:59:59.6')} \
  {2007-01-01 12:59:59.600}
datetest 13.6 {strftime('%Y-%m-%d %H:%M:%S', '2007-01-01 23:59:59.6')} \
  {2007-01-01 23:59:59}
datetest 13.7 {strftime('%Y-%m-%d %H:%M:%f', '2007-01-01 23:59:59.6')} \
  {2007-01-01 23:59:59.600}

# Ticket #3618
datetest 13.11 {julianday(2454832.5,'-1 day')} {2454831.5}
datetest 13.12 {julianday(2454832.5,'+1 day')} {2454833.5}
datetest 13.13 {julianday(2454832.5,'-1.5 day')} {2454831.0}
datetest 13.14 {julianday(2454832.5,'+1.5 day')} {2454834.0}
datetest 13.15 {julianday(2454832.5,'-3 hours')} {2454832.375}
datetest 13.16 {julianday(2454832.5,'+3 hours')} {2454832.625}
datetest 13.17 {julianday(2454832.5,'-45 minutes')} {2454832.46875}
datetest 13.18 {julianday(2454832.5,'+45 minutes')} {2454832.53125}
datetest 13.19 {julianday(2454832.5,'-675 seconds')} {2454832.4921875}
datetest 13.20 {julianday(2454832.5,'+675 seconds')} {2454832.5078125}
datetest 13.21 {julianday(2454832.5,'-1.5 months')} {2454786.5}
datetest 13.22 {julianday(2454832.5,'+1.5 months')} {2454878.5}
datetest 13.23 {julianday(2454832.5,'-1.5 years')} {2454284.0}
datetest 13.24 {julianday(2454832.5,'+1.5 years')} {2455380.0}

datetest 13.30 {date('2000-01-01','+1.5 years')} {2001-07-02}
datetest 13.31 {date('2001-01-01','+1.5 years')} {2002-07-02}
datetest 13.32 {date('2002-01-01','+1.5 years')} {2003-07-02}
datetest 13.33 {date('2002-01-01','-1.5 years')} {2000-07-02}
datetest 13.34 {date('2001-01-01','-1.5 years')} {1999-07-02}
datetest 13.35 {date('2023-02-28')} {2023-02-28}
datetest 13.36 {date('2023-02-29')} {2023-03-01}
datetest 13.37 {date('2023-04-31')} {2023-05-01}

# Test for issues reported by BareFeet (list.sql at tandb.com.au)
# on mailing list on 2008-06-12.
#
# Put a floating point number in the database so that we can manipulate
# raw bits using the hexio interface.
#
if {0==[sqlite3 -has-codec]} {
  do_test date-14.1 {
    execsql {
      PRAGMA auto_vacuum=OFF;
      PRAGMA page_size = 1024;
      CREATE TABLE t1(x);
      INSERT INTO t1 VALUES(1.1);
    }
    db close
    hexio_write test.db 2040 4142ba32bffffff9
    sqlite3 db test.db
    db eval {SELECT * FROM t1}
  } {2454629.5}
  
  # Changing the least significant byte of the floating point value between
  # 00 and FF should always generate a time of either 23:59:59 or 00:00:00,
  # never 24:00:00
  #
  for {set i 0} {$i<=255} {incr i} {
    db close
    hexio_write test.db 2047 [format %02x $i]
    sqlite3 db test.db
    do_test date-14.2.$i {
      set date [db one {SELECT datetime(x) FROM t1}]
      expr {$date eq "2008-06-12 00:00:00" || $date eq "2008-06-11 23:59:59"}
    } {1}
  }
}

# Verify that multiple calls to date functions with 'now' return the
# same answer.
#
# EVIDENCE-OF: R-34818-13664 The 'now' argument to date and time
# functions always returns exactly the same value for multiple
# invocations within the same sqlite3_step() call.
#
proc sleeper {} {after 100}
do_test date-15.1 {
  db func sleeper sleeper
  db eval {
     SELECT c - a FROM (SELECT julianday('now') AS a,
                               sleeper(), julianday('now') AS c);
  }
} {0.0}
do_test date-15.2 {
  db eval {
     SELECT a==b FROM (SELECT current_timestamp AS a,
                               sleeper(), current_timestamp AS b);
  }
} {1}

# Tests of extreme values in date/time functions.  Run with UBSan or the
# equivalent to verify no signed interger overflow warnings.
#
datetest 16.1 {date(147483649)} NULL
datetest 16.2 {datetime(0)} {-4713-11-24 12:00:00}
datetest 16.3 {datetime(5373484.49999999)} {9999-12-31 23:59:59}
datetest 16.4 {julianday('-4713-11-24 12:00:00')} 0.0
datetest 16.5 {julianday('9999-12-31 23:59:59.999')} 5373484.49999999
datetest 16.6 {datetime(0,'+464269060799 seconds')} {9999-12-31 23:59:59}
datetest 16.7 {datetime(0,'+464269060800 seconds')} NULL
datetest 16.8 {datetime(0,'+7737817679 minutes')} {9999-12-31 23:59:00}
datetest 16.9 {datetime(0,'+7737817680 minutes')} NULL
datetest 16.10 {datetime(0,'+128963627 hours')} {9999-12-31 23:00:00}
datetest 16.11 {datetime(0,'+128963628 hours')} NULL
datetest 16.12 {datetime(0,'+5373484 days')} {9999-12-31 12:00:00}
datetest 16.13 {datetime(0,'+5373485 days')} NULL
datetest 16.14 {datetime(0,'+176545 months')} {9999-12-24 12:00:00}
datetest 16.15 {datetime(0,'+176546 months')} NULL
datetest 16.16 {datetime(0,'+14712 years')} {9999-11-24 12:00:00}
datetest 16.17 {datetime(0,'+14713 years')} NULL
datetest 16.20 {datetime(5373484.4999999,'-464269060799 seconds')} \
                {-4713-11-24 12:00:00}
datetest 16.21 {datetime(5373484,'-464269060800 seconds')} NULL
datetest 16.22 {datetime(5373484.4999999,'-7737817679 minutes')} \
               {-4713-11-24 12:00:59}
datetest 16.23 {datetime(5373484,'-7737817680 minutes')} NULL
datetest 16.24 {datetime(5373484.4999999,'-128963627 hours')} \
               {-4713-11-24 12:59:59}
datetest 16.25 {datetime(5373484,'-128963628 hours')} NULL
datetest 16.26 {datetime(5373484,'-5373484 days')} {-4713-11-24 12:00:00}
datetest 16.27 {datetime(5373484,'-5373485 days')} NULL
datetest 16.28 {datetime(5373484,'-176545 months')} {-4713-12-01 12:00:00}
datetest 16.29 {datetime(5373484,'-176546 months')} NULL
datetest 16.30 {datetime(5373484,'-14712 years')} {-4713-12-31 12:00:00}
datetest 16.31 {datetime(5373484,'-14713 years')} NULL

# 2017-03-02: Wrong 'start of day' computation.
# https://www.sqlite.org/src/info/6097cb92745327a1
#
datetest 17.1 {datetime(2457754, 'start of day')} {2016-12-31 00:00:00}
datetest 17.2 {datetime(2457828)} {2017-03-15 12:00:00}
datetest 17.3 {datetime(2457828,'start of day')} {2017-03-15 00:00:00}
datetest 17.4 {datetime(2457828,'start of month')} {2017-03-01 00:00:00}
datetest 17.5 {datetime(2457828,'start of year')} {2017-01-01 00:00:00}
datetest 17.6 {datetime(37,'start of year')} NULL
datetest 17.7 {datetime(38,'start of year')} {-4712-01-01 00:00:00}

# 2022-03-04 https://sqlite.org/forum/forumpost/2ffbaa2c3fd7fb82
# The 'localtime' modifier should preserve fractional seconds.
#
datetest 18.1 {strftime('%f',1.234,'unixepoch','localtime')} {01.234}

# 2023-04 The 'subsecond' (or 'subsec') modifier alters resolutions
# to at least milliseconds. Added for release 3.42.0 .
datetest 18.2 {unixepoch('1970-01-01T00:00:00.1', 'subsec')} {0.1}
datetest 18.3 {unixepoch('1970-01-01T00:00:00.2', 'subsecond')} {0.2}
datetest 18.4 {julianday('-4713-11-24 13:40:48.864', 'subsec')} {0.07001}
datetest 18.5 {typeof(unixepoch('now', 'subsecond'))} {real}
finish_test