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208 Commits

Author SHA1 Message Date
drh 941602ae4f Change constant expressions to pre-computed constants, because apparently 
MSVC on ARM requires that.
[forum:/forumpost/4feb1685cced0a8e|Forum thread 4feb1685cced0a8e].

FossilOrigin-Name: 6c103aee6f146869a3e0c48694592f2e4c6b57ecdb4450f46e762c38b4e686f1
 2024-06-11 14:36:56 +00:00
drh 18281494a2 Fix a compiler warning in date.c. Update makefiles to include all necessary 
dependencies for building shell.c.

FossilOrigin-Name: 178b7d46f9c8e1694ed6f506d2785a9f5c49e2b428e04c8096d557cc1b5c9680
 2024-03-04 18:22:18 +00:00
drh 3f273db39b Adjust date/time functions so that they do a better job of keeping track 
of whether the current time is UTC or localtime, and no-op the 'utc' and
'localtime' modifiers accordingly. See
[forum:/info/e7a939e074|forum post e7a939e074].
Also add the datedebug() function, available
only under -DSQLITE_DEBUG, for improved visibility of the DateTime object
during debugging and testing.

FossilOrigin-Name: dc569683748354a6db83438904422e802d3ea780775c48da85b474fff03ca8a1
 2024-03-04 13:58:09 +00:00
drh 8d25d07d50 Fix assert() statements in date/time computations: The month and day numbers 
can be zero if an error has been seen.

FossilOrigin-Name: fc773f6c76ec114be8b6e25b13885acb5adcc9d052dca0d8d0ff94e2a0743d64
 2024-03-04 11:12:15 +00:00
drh aefa7afddb Back out the previous change. Replace it with new date modifiers "ceiling" 
and "floor".

FossilOrigin-Name: f0831cced2c919e409214d936c81473ae321a98c5bd78b5b729c1269bf71bc45
 2024-03-03 20:15:36 +00:00
drh f52afaf738 Change the magic time-interval names that do truncate-to-same-month to be 
"mnth" and "yr" - "month" and "year" without the vowels.

FossilOrigin-Name: 296b46c529d79385d7f4db2c789254a992c01ff66fe8ba6d3a3ce4aaac0203fb
 2024-03-02 20:50:56 +00:00
drh 6964005847 Proof-of-concept for new time-interval operator "pg-month" and "pg-year" that 
use the truncate-to-month algorithm for month overflow instead of the
wrap-to-next-month algorithm that is used by SQLite by default.

FossilOrigin-Name: b606c0965788f56547435c9318b60e32990877e14a9640d887f33f39d1bdc7c3
 2024-03-02 13:38:46 +00:00
drh 199b0b2d6e Fix a harmless typo in a comment. 
FossilOrigin-Name: 382a8f94bffef3e5f715116e363a30e21e2c53cd42d4959dfbe90c4624143e6d
 2024-01-21 21:20:33 +00:00
drh 514bf99b6a Simplifications to the strftime() logic. 
FossilOrigin-Name: aaa5a044d8a4942278eb4269fa8c7252f9f1dc161408e618e7c97c55a12283ff
 2024-01-20 18:26:28 +00:00
drh f08287cc12 Implement a new algorithm for computing ISO week values in strftime() based 
on the idea (from [forum/forumpost/3681cb1bcd|Nuno Cruces]) of shifting the
date being tested to the Thursday of the same week.

FossilOrigin-Name: b06ab46a9ee98719159ed3e05cdfbf26281353d781206f56ed7cb12859210fed
 2024-01-20 00:31:44 +00:00
drh d0603eda6c Add support in the strftime() SQL function for conversion letters %G, %g, 
%U, and %V.

FossilOrigin-Name: e1155d6aa4b960ecfd14fa3467f28672af3327699c547f5b9e75da3ac1348ff7
 2024-01-18 16:50:25 +00:00
drh d4677f192f Ensure that the YYYY-MM-DD input to date and time functions has been normalized 
prior to returning a result.
[forum:/forumpost/6bb476897e|Forum post 6bb476897e].

FossilOrigin-Name: b692eb8ccb2d0645599ad73a8bdacf5df499114244aadeb38aabc580fc4dc7c5
 2023-11-04 21:44:00 +00:00
drh a910f3f1c5 New conversion letters added to strftime(): %e, %k, %I, %l, %R, %P, %p, %T, %u. 
FossilOrigin-Name: 058722b2d0b995195a8ce3effe9722ae1c18cb1e7a520b481030da0bd579fe41
 2023-08-29 18:28:08 +00:00
drh 1be61ad278 Fix large integer constants so that they work on older C compilers. 
FossilOrigin-Name: 3c94f87806a8b408d8204fc7deec16d01c085ee199ff21a1f20b6346ce816cfe
 2023-06-19 13:09:16 +00:00
drh 0587a1a8bb In date/time functions, fix the rendering of "subsecond" and the 
computeHMS() routine to better deal with floating point
rounding errors that arise on some 32-bit systems.

FossilOrigin-Name: e46a00ae880dd12df090105498a85017d1367f88bf27d86f0b0200cf0536a906
 2023-06-17 15:22:00 +00:00
drh 56a410741b Address various harmless compiler warnings from 
[forum:/forumpost/d526da8ee4|forum post d526da8ee4].

FossilOrigin-Name: 365caf2f97e8f15842f52536e8d05d359e9d6e863182e020ce14a9a9f27ee057
 2023-06-16 14:39:21 +00:00
drh 0c04f2e576 Work around what appears to be a GCC 32-bit optimization problem in the 
computeHMS() routine of the date/time logic.

FossilOrigin-Name: aebdbcbebff1319dd00551c9fb9ad4b08859f10e87f097295d564ae1ba188c02
 2023-06-14 12:19:07 +00:00
drh d34ce81867 Extended the time-diff format so that it can have a 5-digit year. This enables 
time differences to span the full range of dates supported by SQLite.  Also
fix some inaccuracies in the computation of time differences and add new
test cases.

FossilOrigin-Name: d57ddbf4eeeb3ccfe31871f098045b9e58634153a3c3030f597cb58c1177218a
 2023-06-13 16:55:24 +00:00
larrybr 55be21647e Fix straggler misspellings and tidy the custom dictionary. Also include pickups from [forum:/info/c61fb09afd|forum post c61fb09afd]. 
FossilOrigin-Name: 8c291d99946eb32b20b743921202f9c7cfb716268ff526817b27adbb7942e40b
 2023-06-07 17:03:22 +00:00
drh 7d65f1bec0 Simplifications to the new timediff() logic. 
FossilOrigin-Name: d6954259bd3f8475f3804fd02a1591d037efa9df54da45776863c024ff90e596
 2023-05-30 14:46:30 +00:00
drh 30bb082d3a All date/time modifiers of the form (+/-)YYYY-MM-DD without the following 
HH:MM:SS.SSS.

FossilOrigin-Name: fa9237a8ab803ca3f67fe753516b7bdb98be3d625e8e241ddf9b02509210e225
 2023-05-30 11:13:56 +00:00
drh 36a5f1e90c Problems fixed. All tests are passing now. 
FossilOrigin-Name: cff293b0a79107def7bfe54fd60ac4a721c5098c85229d9b46a4e2c4cbf34a6a
 2023-05-30 02:50:32 +00:00
drh 6abbef89e6 Improvements to the timediff() function. Test cases added. Not all test 
cases are passing.

FossilOrigin-Name: 2cf6518140d61e2123dc20f39d7e97e7bce17e7641405df7fd63e1cdda444ae0
 2023-05-30 02:16:33 +00:00
drh 1936a1933c New date/time modifier: (+|-)YYYY-MM-DD HH:MM(:SS.SSS)? 
FossilOrigin-Name: 3832b8a9ef84d9b53b48dfce9c1e724897cd7b3e05711e01675419655f894eac
 2023-05-29 20:33:33 +00:00
drh 0cbc2143b9 Prototype implementation of a proposed "timediff(X,Y)" SQL function. 
FossilOrigin-Name: 054a195125a273bab026ada5f07cc7c32818007027a1fd028ca59d2f179276d4
 2023-05-29 18:01:42 +00:00
drh 11d5efde75 Add a new modifier to date/time functions: "subsecond". May be 
abbreviated as just "subsec".  This modifier causes functions to try
to show fractional seconds if they do not already.

FossilOrigin-Name: 03f2a15e8779d8ca76510badeabde62a0539ce8a6368d7a9688f5aadc215b940
 2023-04-21 15:30:47 +00:00
drh 0c55b5fd1c Change a variable from 32 to 64-bits to avoid a harmless compiler warning 
in Xcode.  [forum:/forumpost/402d733c22|Forum post 402d733c22].

FossilOrigin-Name: 0216ce23cf23bc147c5de6de178a6689b7ad744bf0ee0098809938b5fe10708b
 2023-02-11 21:11:39 +00:00
drh 601e4d4a0f Back out the 'txn' enhancement to date/time functions. The duration of a 
"transaction" is confused and needs to be straightened out prior to moving
forward with this change.

FossilOrigin-Name: 4a145f07322d768a07619bed27e0390d50f3a01d07787b9296234a5ceb6f1218
 2023-02-08 20:29:48 +00:00
drh ed092fc368 Revert the behavior of date/time functions with no arguments so that they 
once again work like 'now', even while CURRENT_TIMESTAMP and similar work
like 'txn'.

FossilOrigin-Name: 06180caff0f5d8aba83b9f7be682ccdd6cb2ffc228b557ee6c1fd00fe5c23e92
 2023-02-08 12:01:48 +00:00
drh c1dab9ded2 Change the behavior of date-time functions without any arguments (and thus 
the CURRENT_TIME, CURRENT_DATE, and CURRENT_TIMESTAMP variables) so that they
work like 'txn' instead of like 'now'.  This is an incompatibility with legacy,
but brings SQLite into conformance with all other SQL systems.

FossilOrigin-Name: 1ac78be54502779236645eac35b962797f2fb98307d059d2aa19658c4fa74cb7
 2023-02-08 11:34:05 +00:00
drh 3393ee7ff6 Simplify the code and add test cases. 
FossilOrigin-Name: d3bed4caff561e71c396cc869c5b4d9bf216ba203485e738c12ec62741f1aba5
 2023-02-07 23:55:59 +00:00
drh d4af882a1b Add support for the 'txn' argument to date/time functions that works like 
'now' but keeps the same time for the entire transaction.

FossilOrigin-Name: 5e4f45af96247e29910403a63ac148cb313b005f9c014b37a9a49d98f5fef9a6
 2023-02-07 21:55:14 +00:00
drh 26e817f69b Avoid trying to cast an over-sized floating point value into an integer. 
FossilOrigin-Name: 3518cd7cb1feeefc3963da72c2d258d81d8914f1e1f427da28a00b6228cf126c
 2022-08-08 16:25:13 +00:00
larrybr a5cc692422 Improve accuracy of julian day milliseconds calculation. 
FossilOrigin-Name: e5e9311863544ef30dccd3bd0b3a048a864a650e69cdf9aab13dbe32a4777b51
 2022-07-19 21:12:54 +00:00
drh ea840117af Fix the 'localtime' modifier in date/time functions so that it preserves 
fractional seconds.
[forum:/forumpost/2ffbaa2c3fd7fb82|Forum post 2ffbaa2c3fd7fb82].

FossilOrigin-Name: 1c875b0764ab00e95c92f0ee329659e88041763e125c2891201d80f68c41f717
 2022-03-05 20:12:53 +00:00
drh 16f56e8416 Fix compiler warnings for older compilers (ex: gcc 4.0.1 powerpc-apple-darwin). 
FossilOrigin-Name: 5c188243d769681c68938c8e432155c8ec838d9e32fe8d1b12286ebc9d0e87f1
 2022-02-21 14:30:59 +00:00
drh b30af022da Fix SQLITE_TESTCTRL_LOCALTIME_FAULT so that it works even if mutexes are 
enabled.

FossilOrigin-Name: 64537a0669553e8a6b610b9e9703ec084472516c86cfc22a7a6c73b6c66131ee
 2022-02-10 23:12:58 +00:00
drh d7e185ce5d Enhance SQLITE_TESTCTRL_LOCALTIME_FAULT so that is able to install an 
alternative localtime() interface so that the localtime logic an be better
tested.

FossilOrigin-Name: 6e25cb0890e8cdc63c9a21e841844d066267fc32ad143527843f7c8d05612b53
 2022-02-10 21:26:53 +00:00
drh eadccaa926 Performance improve to the 'localtime' and 'utc' modifiers for date/time 
functions.

FossilOrigin-Name: 85cb6014751a0572d28ebd839331d5d7a78de45c9e522adcd834a8a85746f32e
 2022-02-10 15:40:40 +00:00
drh 522608d3a2 Faster implementation of the date(), time(), and datetime() functions. 
FossilOrigin-Name: fa1b393bdb66b985f6552190a8242ed878f91d653a03352f65aa8d750de3cec4
 2022-02-10 12:57:53 +00:00
drh 4b51e8bd68 Enforce the restriction that 'unixepoch' only works as the first modifier 
after the time-value.  This has been documented since 2004, but has never
actually been enforced before.  Also add new test cases for date/time
functions with evidence marks.

FossilOrigin-Name: 64fa9e8c87179211cec248e6dfd7578502e6e969a19e91a4f0e21ed9b972a6bc
 2022-01-27 13:52:01 +00:00
drh a1c8151bab Fix some of the new date/time function features to comply with the spec. 
Update requirement marks.

FossilOrigin-Name: 2f5dc7a9eed89baf6814e9e123354b262c806c853dee1243c93286c564b9aba8
 2022-01-21 18:57:30 +00:00
drh b131bf7039 Reduce the size of the compiled binary by a couple of hundred bytes by 
using a thigher packing of a transformation table in date.c.
Suggested by [forum:/forumpost/4f6efbb2a9|forum post 4f6efbb2a9].

FossilOrigin-Name: c75ba4fa644d338d22813c17172b9975411fe6197e07fd584e3209e3beb78036
 2021-12-23 00:16:06 +00:00
larrybr 969c46486c Clarity tweak for date.c 
FossilOrigin-Name: db58b2def014bdb146751110488a088767530ca2557baf73d6181a2558bbe6d3
 2021-12-08 20:36:08 +00:00
drh 1312a9c908 Add the unixepoch() function and the 'auto' and 'julianday' modifiers. 
FossilOrigin-Name: 559fdc0aa76f4c207f99f7b0cee42043b402dc388165817529d9963b115a798c
 2021-11-29 17:23:27 +00:00
drh 13ca72d011 Fix harmless compiler warnings, mostly caused by prior efforts to get static 
analyzers to run without warnings.

FossilOrigin-Name: cddd3b382a118bb16be3a602ae711fe2c2a7d1c673dd30dd3977b67ee555e666
 2021-10-05 18:59:05 +00:00
drh 5bf4715e01 Add the sqlite3ResultStrAccum() internal interface to simplify the 
the implementation of functions that return strings.

FossilOrigin-Name: e548e9299d3fd6ce5b647cf0dd93ff8e917a5eda43076c6a02389c52640e2e50
 2021-10-03 00:12:43 +00:00
drh a7d8d4a07a Date/time functions with no arguments (ex: date() or time()) should be 
non-deterministic.  Fix for ticket [2c6c8689fb5f3d2f].

FossilOrigin-Name: 1734c332e7f609769fc30f82cf7af097c2964e08900ee3e297f6a25e6df60555
 2021-03-16 18:41:20 +00:00
drh 82b0f106ce Add the sqlite3Int64ToText() routine and use it to convert integers to text, 
as it is much faster than the generic text formatter.

FossilOrigin-Name: 14eed318aa9e6e16d1aa13a9f34e3822aa135c39ba06c77df7743509fed6c95e
 2020-07-21 18:25:19 +00:00
drh ccb2113a62 Refactoring various names. No changes in the resulting machine code. 
FossilOrigin-Name: 7bb08b1bfcf184e4b59c8c9028926a0052612ff6a6731914ccdb8dee07ea4a98
 2020-06-19 11:34:57 +00:00