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98aa1d735eb80f90b4523f50c17fc965ce967c79
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395 Commits

Author SHA1 Message Date
drh
d44390c8c5 Performance improvement for column name lookup. 
FossilOrigin-Name: 1e4b6a93987cdfbf829e2ff35ef417c290625f2894ad11949e301af518f1fb44
 2020-04-06 18:16:31 +00:00
drh
b48c0d59fa Simplify the code by removing the unsupported and undocumented 
SQLITE_HAS_CODEC compile-time option

FossilOrigin-Name: 5a877221ce90e7523059353a68650c5fdd28ed032807afc2f10afbfbf864bdfe
 2020-02-07 01:12:53 +00:00
drh
ef9f719d0b Fix #ifdefs so it compiles cleanly with all SQLITE_OMIT compile-time options. 
Update compile-time option testing.

FossilOrigin-Name: 7584e4b649d57767aac3906da6b06549d5b772aaa69f469c623ae5da834d54d5
 2020-01-17 19:14:08 +00:00
drh
87969b2a11 When doing a test-to-double conversion on a BLOB with an odd number of bytes 
and assuming a UTF16 encoding, ignore the last byte.
Ticket [9eda2697f5cc1aba].

FossilOrigin-Name: 1c76f1d8ec0937a2d2e4ce75f98494c953e9621db31945d7e44f45d90d1c3892
 2020-01-08 12:17:46 +00:00
drh
e3a4f2cf77 Fix an utterly harmless "applying zero offset to null pointer" UB warning 
in sqlite3AtoF():

FossilOrigin-Name: 052fdf5e58b41ccadaa5aac293ceb4d309ced661d46f3a52be9eb8d01d347a82
 2019-12-13 23:38:57 +00:00
drh
46a31cdf6b Make sure the WITH stack in the Parse object is disabled following an error. 
FossilOrigin-Name: de6e6d6846d6a41c4821454dfdc042096234df753be08c5567b79fe535d9b6ea
 2019-11-09 14:38:58 +00:00
mistachkin
6dcf9a451e Fix harmless compiler warning seen with MSVC. 
FossilOrigin-Name: 73a82114733af2a316f20eb8578badef307d14286c6ec03197744a6793425161
 2019-10-10 23:58:16 +00:00
drh
175b8f06f7 Remove support for STAT3. The sqlite_stat3 tables are ignored, if they 
exist.  STAT4 continues to work as it always has, and as it is a superset of
STAT3 is the recommended replacement.

FossilOrigin-Name: 1e17ea2fd1df4ad49138c787c8fe3207dd0c25c93f9001d52a9b69f8c12e841c
 2019-08-08 15:24:17 +00:00
drh
378a7d356b A string consisting of a single '.' is not a floating point literal with extra 
text at the end.  Fix for ticket [412bba9b22c677da]

FossilOrigin-Name: 57050162294efec90caa5cc3c2f8c1a85215526adcf57b284ce2d2e799286b78
 2019-06-10 23:45:10 +00:00
drh
9a2782293c When casting string values into numeric and the string has a prefix that looks 
like a number but total string is not a well-formed number, then take extra
care that the result is either integer or real depending on what the prefix
looks like.  Fix for tickets [e8bedb2a184001] and [4c2d7639f076aa].

FossilOrigin-Name: 67a68af5578f08d2be2e48cf4fd12a6cf35a09c47d259deda81950f7ee1f02f7
 2019-06-07 22:26:08 +00:00
drh
84422db987 Optimization to the round() SQL function for large input values without a 
fractional part.

FossilOrigin-Name: e95138f5f4febde598f39e031d6e4f4d5ad0adbd8dcdd34fd0baaa78ab393417
 2019-05-30 13:47:10 +00:00
drh
05921223c2 Smaller and faster sqlite3IsNaN() implementation makes deserialization of 
floating point values much faster.

FossilOrigin-Name: ea748edecb261f2b862d542daff6e99a6fd8879a8ace94b440d99e110577d1c1
 2019-05-30 00:46:37 +00:00
drh
8a3884efae Much faster implementation of applyNumericAffinity() by avoiding some 
unnecessary calls to sqlite3Atoi64().

FossilOrigin-Name: c1d8a3f65490eef2216f360d708b1746cbaa6dadce42c0950dc8e09b9ab28ee2
 2019-05-29 21:18:27 +00:00
drh
c2b893a7e0 Performance enhancement in sqlite3AtoF(). About 8% faster. 
FossilOrigin-Name: 81721aa54587e20d031d528fb6b74d91671a6e950fa926dc63f4284466e70f0e
 2019-05-25 18:17:53 +00:00
drh
38a59af417 Use "long double" literals to initialize an array of "long double" objects. 
FossilOrigin-Name: 2e2ebad3ab636c4c65814ad41d417b105be8e254d609d0e08fbba4c5bd107bf3
 2019-05-25 17:41:07 +00:00
drh
7e6dc5d908 Fix the previous check-in [db9acef14d492121] so that the amalgamation build 
works for systems for which lack HAVE_ISNAN.

FossilOrigin-Name: 3cc55e09e6c1de2059d97bdddf2fdfbdcc62c584b513f56faf9d3a39ef80cddd
 2019-05-10 12:14:51 +00:00
drh
698c86f40d Small performance improvement on the variable-length integer decoder: 
sqlite3GetVarint().

FossilOrigin-Name: 5df2bf62fcd4dfdaa195062dddbd5ce5420bc239b2649ac8f547e0db34e7f0bb
 2019-04-17 12:07:08 +00:00
drh
7e427337fe Faster and smaller implementation of sqlite3StrICmp(). 
FossilOrigin-Name: 7ac500fb5abfe1ad60f2ffdcc8fbe5ccc1c641bbeed53f00940e9ff78788e53d
 2019-04-17 11:34:44 +00:00
drh
0aa3231ff0 Enforce the SQLITE_LIMIT_COLUMN limit on virtual tables. 
FossilOrigin-Name: 0b6ae032c28e7fe34d81d1769f6e2901addbd1b95cd9a255dcef274061fb0164
 2019-04-13 04:01:12 +00:00
drh
c3dcdba387 Improved reporting of SQLITE_TOOBIG errors while parsing. 
FossilOrigin-Name: ea2d4b65e20e44e19219c821bf68e97ff3af1760b3b4762250d020ba2a5a6343
 2019-04-09 21:32:46 +00:00
drh
ce059e5219 Improved comment on the sqlite3FaultSim() function. No changes to code. 
FossilOrigin-Name: 08b29672c552e5a6a3874746c6cc7025295e0e44dec43a1bfba3022acce849ff
 2019-04-05 17:22:50 +00:00
drh
51d35b0fa9 The keywords TRUE and FALSE should only act as boolean literal values if 
unquoted.

FossilOrigin-Name: 5547f39de993c708f72301ef25df190a2f007e0c4253799bdd9e86bb1ae41777
 2019-01-11 13:32:23 +00:00
drh
1822ebf9b1 Changes to avoid a harmless UB warning from clang. 
FossilOrigin-Name: 19f5c1400054df10688ab448e7e23afef97cab4a7c7a3e411f7527509b515dd8
 2018-01-27 14:25:27 +00:00
drh
4eb57ceffc Improve text-to-integer conversion in boundary cases. The 
sqlite3Atoi64() function always returns the minimum or maximum integer
if the magnitude of the text value is too large.  Trailing whitespace is
now ignored.

FossilOrigin-Name: ace0644a1a2a42a3ea42d44f00a31915b8a7e56c9ba90f90a6c02001f89f9c86
 2018-01-26 18:37:34 +00:00
drh
3dc9727782 Alternative implementation for the internal sqlite3Pow10() utility for MSVC, 
which is more accurate on that platform.

FossilOrigin-Name: 469b96be5350ba2291518280ffe179b87aa7fbe701e2813ef63843922771517a
 2018-01-17 21:14:17 +00:00
drh
02a43f6def Faster and smaller implementation of sqlite3AtoF() based on a suggestion 
from Cezary H. Noweta.

FossilOrigin-Name: fd2e0e7a770c2ce9355068aad1024c3d2861c104fd3be304a91c55ca742155fa
 2017-12-26 14:46:20 +00:00
drh
12f84e5ee5 Fix a harmless compiler warning from Xcode 9.1. 
FossilOrigin-Name: 66d98310b91c69fd01c6a9a958ef1eabda14ec6cd0e4b6612f877f2dfe486c54
 2017-11-06 09:34:45 +00:00
drh
84d4f1a328 Improved resolution of large integer values in "CAST(x AS NUMERIC)". 
FossilOrigin-Name: 7f2bd4ff45fba29528c18cac6da983bd9b164303525d3965056f5b40f85dc83f
 2017-09-20 10:47:10 +00:00
drh
3ba18adde5 Fix an error in [b22cdd67] that can cause a negative infinity to be (rarely) 
reported as a positive infinity.

FossilOrigin-Name: 9780b23ca375de6a542516fbc03eb39d5a393ca577718fda231d0d0ccf3b1c7e
 2017-09-12 15:05:34 +00:00
drh
b9772e7fe8 Changes to (hopefully) get the build working with recent Intel compilers. 
FossilOrigin-Name: b22cdd6734ecda2b2b9749668f353abc2660f192d6a40c5d266309d30e25695e
 2017-09-12 13:27:43 +00:00
drh
ceb4b1dbdd Use the __builtin_clzll() function of gcc to improve the performance and 
reduce the size of the sqlite3LogEst() routine.

FossilOrigin-Name: a42a438cbbd721765ca55e71c464552dbaa494050cf472593599b8c7f0249516
 2017-08-17 20:53:07 +00:00
drh
313e6fd222 Fix the sqlite3GetInt32() function so that it correctly returns 0 on a 
zero-length input string.

FossilOrigin-Name: 05eba9e3a5f9bb2a40af1dacd885e1915fbcd20b9af4cf0eed79ac16dbeba31b
 2017-05-03 17:44:28 +00:00
drh
dc5ece86ae Remove the CLANG_VERSION macro, since we have learned that version numbers in 
clang are "marketing" and are inconsistent and unreliable.  Builds using clang
will still use the GCC_VERSION macro since clang works hard to be gcc
compatible.

FossilOrigin-Name: 810d29320b853b3a01aa50d8f2a0bceacf79e0aa
 2017-02-15 15:09:09 +00:00
drh
a39284bfa8 Cleanup the usage of the SQLITE_DISABLE_INTRINSIC compile-time option. 
Remove the SQLITE_RUNTIME_BYTEORDER compile-time option.  Use
-DSQLITE_BYTEORDER=0 instead.  Fix a bug in R-Tree that occurs when compiling
on a known little-endian machine without the use of intrinsic byteswapping
functions.

FossilOrigin-Name: 798fb9d70d2e5f95e64237b04d6692360133381a
 2017-02-09 17:12:22 +00:00
drh
b94f2eccc1 Use the CLANG_VERSION macro to control clang-specific features. 
FossilOrigin-Name: f8ebeec211483503e135104ef977b3c384a1d789
 2017-01-03 20:01:24 +00:00
drh
4a47761e0d Make use of the __buildin_OP_overflow() functions from GCC when doing 
64-bit signed integer arithmetic.

FossilOrigin-Name: 82cbebb8ee4484f13e5f48d305e20e73063f273e
 2017-01-03 17:33:43 +00:00
drh
ce1bbe51b5 Add check to prevent a VList from growing after pointers to labels have been 
taken.

FossilOrigin-Name: aa23d7eaf69f5ecbf9500b2353846094cae41e6c
 2016-12-23 13:52:45 +00:00
drh
9bf755cc44 Use the VList object to replace Parse.azVar for tracking the mapping between 
SQL parameter names and parameter numbers.  There is a performance
improvement, though there are still a few hiccups in the current code.

FossilOrigin-Name: 68ecafa1425a41358c88f41efea3262f1b4490f2
 2016-12-23 03:59:31 +00:00
drh
d12602a9c5 Rename the SQLITE_OMIT_BUILTIN_TEST compile-time option to SQLITE_UNTESTABLE. 
FossilOrigin-Name: f360818737e73ee4f944685a547abc8f14f47819
 2016-12-07 15:49:02 +00:00
drh
09952c6490 Improved implementation of 64-bit signed integer multiply that correctly 
detects overflow (and promotes to floating-point) in some corner cases.
Fix for ticket [1ec41379c9c1e400]

FossilOrigin-Name: db3ebd7c52cfc5fcc7be00f52e9d7c84719f7b93
 2016-09-20 22:04:05 +00:00
drh
75ab50ce8f Use comments to mark several branches as optimizations. No changes to code. 
FossilOrigin-Name: 33e627472780b872716c504f2d585cc057c390a5
 2016-04-28 14:15:12 +00:00
drh
10c0a2a7c9 Remove an unnecessary conditional from the sqlite3DecOrHexToI64() routine. 
FossilOrigin-Name: fcf85bfe50b254e825ee63a4cd0aa0b333b06eed
 2016-04-28 03:52:18 +00:00
drh
609d5846ba Change the sqlite3Atoi64() routine so that it returns failure if not all of 
the input characters are consumed, even if it consumed all characters up to
the first 0x00.  This has no impact on external APIs as far as I can tell.

FossilOrigin-Name: 46d4ffff3bd33d7e901e76cfac1cbde38d4f61d0
 2016-04-28 00:32:16 +00:00
drh
ad975d539e More simplification of the sqlite3AtoF() routine. Add special comments 
to indicate branches that are for optimization purposes only and that give
the correct answer even if always or never taken.

FossilOrigin-Name: 0065fe97cb8e5076acae1bf1560fd2f69dab9014
 2016-04-27 15:24:13 +00:00
drh
c6daa01c05 Remove still more unnecessary branches from sqlite3AtoF(). 
FossilOrigin-Name: 3adfe9f3e6ce7cc09fcb570d9b65e830a96cac15
 2016-04-27 02:35:03 +00:00
drh
15af62acff Further simplifications to sqlite3AtoF() to remove unneeded branches. 
FossilOrigin-Name: dd69e53cb077873171af5312c633ca185595bf31
 2016-04-26 23:14:45 +00:00
drh
e5f06fdc87 Remove an unnecessary line from the sqlite3AtoF() routine. 
FossilOrigin-Name: a9d007494cfe30a26dca5352655dc7702351476e
 2016-04-26 21:02:53 +00:00
drh
244b9d6ec6 Performance optimization to sqlite3Dequote() and its callers. 
FossilOrigin-Name: 9efe2265b1e70172778d333c5b9d9a76095427ab
 2016-04-11 19:01:08 +00:00
drh
40dc357a01 Remove an unnecessary branch in the sqlite3LogEstToInt() routine. 
FossilOrigin-Name: da81d7afeb0566a09a505ba5fce901e991e4a029
 2016-04-05 23:39:53 +00:00
drh
d7564865ad The sqlite3_column_decltype() routine should return NULL, not an empty string, 
if the column has no declared type.

FossilOrigin-Name: 605eba4a756e7185119088e2242f82691d078b01
 2016-03-22 20:05:09 +00:00