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21c57abc535121fc5d02a1ebbf815e8fc45f4295
Commit Graph

523 Commits

Author SHA1 Message Date
drh
a1b0ff1735 Experiments with a new algorithm for converting ieee-754 binary64 numbers 
into decimal.

FossilOrigin-Name: e923405e448385085224f9289991b303d86b02763535ea77d6fcee98ba6fc1f2
 2023-06-30 18:35:43 +00:00
drh
48114d08cf Completely unwind the enhanced precision sum() from [a915f15a916af698] so 
as not to offend UBSAN and OSS-Fuzz.

FossilOrigin-Name: 85be05b66ef975f02a3e7b2984bcab97d9280c7f3b6ee1e16718de549f240d46
 2023-06-30 14:01:09 +00:00
drh
60f41362cf Make the sum() function less precise and slower in order to avoid 
harmless signed integer overflow UBSAN warnings from OSS-Fuzz.

FossilOrigin-Name: 1be0646a2c352dbf03d2af87fd48b6f9edfd68666790ac6863144ac95f3e0621
 2023-06-30 11:51:36 +00:00
drh
12b198f1a2 Use ideas from T. J. Dekker in "A Floating-Point Technique for Extending the 
Available Precision" (1971-07-26) to enhance the accuracy of the SUM()
aggregate function in cases where input magnitudes vary wildly.

FossilOrigin-Name: 439fc00fee62b4db3751860485e21a99cae4fd1f5d911b2c08651a1466245ecc
 2023-06-26 19:35:20 +00:00
drh
077efc2730 Optimize the argument to the octet_length() function so that it does not 
attempt to read content from disk.

FossilOrigin-Name: 8b8ea4e3f52d96cc217bd1fb27ca4a83489ef1f250756ed2f790d1b0ee529a3a
 2023-06-22 21:19:37 +00:00
drh
d6c671e626 Merge recent trunk enhancements into the octet_length branch. 
FossilOrigin-Name: d35c214811aac7dec0000ca2aa77231f74a7963dd0c53cf25a65ade5ef0f8dc0
 2023-06-22 13:01:02 +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
larrybr
bc91738e66 Add a C-source spell-checking facility. make misspell (on Nix) 
FossilOrigin-Name: 26c1bb4bd9e9f56613c3aa87407a7f562fd4ebde5bfd6dece02078001d9a45f8
 2023-06-07 08:40:31 +00:00
drh
b3d7f1c2db Prototype implementation of the octet_length() SQL function. 
FossilOrigin-Name: 2db989c8635f7e89b3ea58d1fde94787fced039ac1a118d9b6362811eda73f87
 2023-06-03 11:22:30 +00:00
drh
e030619109 Updates to compile-time option usage and especially to the compile-time option 
test script in tool/omittest.tcl.

FossilOrigin-Name: fece588b186c4f9f76d626313e35336fd5681e966e9bd0fa1053b147c4e3c315
 2023-05-05 14:16:31 +00:00
drh
3c2688d137 Provide -DHAVE_LOG2=0 and -DHAVE_LOG10=0 compile-time options for use on systems 
that lack the log2() and log10() standard math library routines, to cause
SQLite to substitute its own alternatives.

FossilOrigin-Name: 7ee22f95e7a7d8650f961f20e304e56c7813e624f05655d7392ca9347748270f
 2023-02-23 01:52:54 +00:00
drh
3c7e90b894 Fix a harmless UBSAN warning in debugging code of the new unhex() function. 
FossilOrigin-Name: 315574d5cbe5c805ff2163052d986b054985984fb45bfb064d1a7b39a22b90eb
 2023-02-18 15:50:23 +00:00
dan
a50db438eb Update unhex() to allow a second argument, specifying a set of characters that are permitted to appear between pairs of hexadecimal digits. 
FossilOrigin-Name: 66c8562690b19f17972589611810e1dccad3a48777acb05208289c1f77076f71
 2023-01-24 17:19:47 +00:00
dan
e3c11d55db Add experimental user function unhex(). 
FossilOrigin-Name: dbe424b5db33ce2c7562dfb44daf2969cf3074234cc891eb9b8d0d907faf6a78
 2023-01-23 14:11:34 +00:00
drh
3547e4997f Fix lots of harmless, nuisance compiler warnings, mostly unused parameter 
warnings in extensions.

FossilOrigin-Name: c14bbe1606c1450b709970f922b94a641dfc8f9bd09126501d7dc4db99ea4772
 2022-12-23 14:49:24 +00:00
drh
79b9bc4452 More efficient implementation of large precisions on the "%c" format for 
the built-in printf().  This is an effort to avoid a reported
timeout on a (ridiculous) query generated by OSSFuzz.

FossilOrigin-Name: 371f9b88387a44a5f820279d79733d1deb7eafc72f320ec47a11679bbdbb49ef
 2022-12-21 19:11:56 +00:00
drh
3c1572ddb4 Use the log10() and log2() functions from the standard C library to implement 
the equivalent SQL functions, in the hope that this will prevent reported
precision problems.
See [forum:/forumpost/cfceb1230bdcfd84|forum post cfceb1230bdcfd84] and the
surrounding thread.

FossilOrigin-Name: 7c572d02e60a83b36543ba4d9d45f61e9fc111b61fee085410c2d87558c732d6
 2022-11-17 14:40:33 +00:00
drh
42dddb97de Enhance the sqlite3_strglob() and sqlite3_strlike() interfaces so that they 
will do sensible things with NULL string pointers.  This is an extra layer
of defense against bugs such as reported by
[forum:/forumpost/730b554179|forum post 730b554179].

FossilOrigin-Name: 8ba9c884bded52e3e044ff39c826c04838e7c31f05d802f4a14d9ce5a01ab721
 2022-10-25 13:44:18 +00:00
dan
2bc4a6cad0 Fix a problem in the LIKE and GLOB operators that may occur when the character immediately following a "%" or "*" wildcard is U+80. Reported by [forum:61bf7ccbdf]. 
FossilOrigin-Name: 2da677c45b643482eec39e4db7079c772760bc966dc71bf6c01658cc468f5823
 2022-10-14 15:10:36 +00:00
drh
645682a7c7 Move the sqlite_offset() function implementation to be an in-line function, 
thereby avoiding special case code and freeing up a bit in the
FuncDef.flags field.

FossilOrigin-Name: 1c9812c458bd229c862efe5df1b64fae333da9871c8756b5ae4605a81bcda4b5
 2022-06-01 11:05:59 +00:00
drh
724e298e9c Slight increase in the accuracy of log10(). 
FossilOrigin-Name: c48a735bd4a1dbd541aed5937c25fc0c606c4263d8ee94cae30a06b1a7b26d9a
 2022-05-25 13:10:29 +00:00
drh
97a985e0c5 The sqlite_offset() function should be non-deterministic. 
dbsqlfuzz 3df8230bb940870db87ffca2c0fc759c1e7fa356.

FossilOrigin-Name: e1a185e60afd32d3b25278dee42049920759ccd8fe709161007f5daa4a048693
 2022-03-06 11:43:06 +00:00
dan
af7b8dcb58 Avoid dropping SQLITE_TOOBIG errors in the quote() function. 
FossilOrigin-Name: 115c3051a1ff7567e84f14fc4c49efe61bc2850248533449b0195c305ab6516e
 2022-02-12 13:37:27 +00:00
drh
69b0ce33fd Fix various harmless compiler warnings. 
FossilOrigin-Name: 70049342d5ad57ea3e863bba19253934b868bacdd1c26c9371bac024a829badf
 2022-02-04 13:15:01 +00:00
drh
cd379b8a53 Merge trunk enhancements into the json-in-core branch. 
FossilOrigin-Name: ea755771699dcbffe0ddfd204d42fae9b6e79e107485c725b8eb6caab92aacb8
 2022-01-09 19:36:39 +00:00
drh
9d44f18b3c Add a new built-in subtype() function. 
FossilOrigin-Name: a25f4ce255c034fc694c33728aedb98289ebccda9c48920829ef780b92b8faee
 2022-01-09 16:54:02 +00:00
drh
6bcd58572b Add function format() as an alias for printf(), for compatibility with other 
systems.

FossilOrigin-Name: 68bffc612c467b2419bf5fe85a8ca16b787003e0e8c11f7c051a879f5865b847
 2022-01-08 21:00:38 +00:00
drh
9dbf96bd70 An attempt to integrate the JSON functions directly into the SQLite core, 
rather than holding them as an extension.

FossilOrigin-Name: 583b47d865fb8d2c9ae4d3a4e70356a8a758978efb0a282f6b19775bf41fb748
 2022-01-06 01:40:09 +00:00
drh
ef95d5583b Factor out the logic that does quoting for the SQL quote() function, so that 
it might be reused for other purposes.

FossilOrigin-Name: 8e98ba1eeb1a5a61b7cb2de337ef8bca3d07494266a50d62b9c6bc60ad0a955f
 2021-12-10 21:01:24 +00:00
drh
4fc80671f5 Fix the group_concat() inverse function implementation so that it correctly 
handles BLOB inputs when database text encoding is UTF16.

FossilOrigin-Name: 38a1326b4bd11bbe2846990d099c28520d17ab4cace1af67248c2472f89df929
 2021-10-12 22:55:04 +00:00
drh
a4eeccdfdf Protect all accesses to the Expr.x union using nearby assert()s and branches. 
FossilOrigin-Name: 8eaa1d4a98b24adf245bbd2fe9212aa6a924a0f09c445906d7f87574f36a7423
 2021-10-07 17:43:30 +00:00
drh
f975107437 Protect all accesses to the FuncDef.u and Expr.u unions using nearby 
assert()s or branches.

FossilOrigin-Name: 9af863f065e0bef491c2ab7525194505f9516f4e6dfc789d2e3a9d2c2438533a
 2021-10-07 13:40:29 +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
260ff08133 Fix a problem with group_concat() when it is used as a window function with 
a sliding window, as described by
[forum:/forumpost/f3eb24a6c0|forum thread f3eb24a6c0].

FossilOrigin-Name: f47f7f78227830c065d9ce715b8456eab81a38d680f76bf4ff08f298d84f9c7a
 2021-10-01 22:48:52 +00:00
drh
3dd01111e2 Remove unreachable branches in the fixed group_concat() code. 
FossilOrigin-Name: 8bd721c29e7a28cd75885dd80235e4e37aa0847229f769f49e01127f794fa63a
 2021-10-01 02:45:48 +00:00
drh
f06db3e892 Fixes to the version of "varsep" group_concat so that (1) it builds under 
separate compilation and (2) omits tabs in source code and (3) runs faster
than trunk.  This variant of the group_concat_varsep branch might be preferred
over the tip because it preserves (undocumented) legacy behavior about the
position of separators relative to terms.

FossilOrigin-Name: 04399cf9645e04b171090ff8a3c27752929c10d2cd8778e26f8f3337aa902ab6
 2021-10-01 00:25:06 +00:00
larrybr
dde13e6f88 Get group_concat() to handle varying separator lengths when windowing 
FossilOrigin-Name: 98e0f2bf67cdee1da1edadeb54ff8564728b3f28fc821e46e8de201247c3fc87
 2021-09-29 00:32:13 +00:00
drh
3780f9a4aa Make the affinity() function available even if compiled without 
SQLITE_DEBUG.  Surround the implementation of all test-only SQL functions
with #ifndef SQLITE_UNTESTABLE.

FossilOrigin-Name: b7e00ef8059f6fb5658c6ad6f337cfdf065a5f1b1130452122282f3a69e98a93
 2021-09-17 13:07:15 +00:00
drh
c0bd26a23a Update requirements marks to reflect recent documentation changes. 
FossilOrigin-Name: 08cab8921e670a0d1758b505fe8c7455f6194cec69d1b7b77de91688be1028a6
 2021-09-14 18:57:30 +00:00
drh
bb30123178 Attempt to omit ORDER BY clauses from FROM-clause subqueries if those ORDER BY 
clauses do not affect the output.  See
[forum:/forumpost/2d76f2bcf65d256a|forum thread 2d76f2bcf65d256a] for
discussion.  This can help the query flattener in
some cases, resulting in faster query plans.  The current implemention does
not always work.

FossilOrigin-Name: ef97c3e7c3ea2cf1a4db6591328fe7ce3f1d189afc2d578159135824ec89e620
 2021-07-15 19:29:43 +00:00
larrybr
10496f7657 Fully incorporate *_changes64() API improvement. 
FossilOrigin-Name: 6699a2f6bec9dfcdc456ff1cd8e652588b144ec28b7eac6e403a63eab61b416e
 2021-06-23 16:07:20 +00:00
dan
2c7188732d Add the sqlite3_changes64() and sqlite3_total_changes64() API functions. 
FossilOrigin-Name: 48fdec22c966003f5577e0bf52906ef90df11e4e395723a646304e67ed976f37
 2021-06-22 18:32:05 +00:00
drh
972da42749 Prevent an infinite loop in the trim() SQL function if the second argument 
is a carefully malformed UTF8 string.

FossilOrigin-Name: 829343c26ed7b87fafc70de3369625209bad91e79bb7ca2946d5c8d61cc1c3c4
 2021-06-15 14:34:21 +00:00
drh
81e5a9a6df Fix the comment on the implementation of the pi() SQL function. No changes 
to code.

FossilOrigin-Name: 5620bd466eb10fd4daf51af9b88d8221f981dc0ceabfa84a0e1d5c817f635429
 2021-04-16 11:05:19 +00:00
drh
33941691a5 Fix an issue with the LIKE operator when it includes the "ESCAPE '_'" clause. 
Ticket [c0aeea67d58ae0fd].

FossilOrigin-Name: 27d4117980d125975b5e70eeea58a6ab07bcf066e71b5fcb81b822e05afdbab0
 2021-02-15 17:02:01 +00:00
drh
02d6f9b295 Fix possible division-by-zero in the new log() SQL functions. 
Problemm discovered by OSSFuzz.

FossilOrigin-Name: 1ffd321a33b778e87614a26a91a8407ec7b9dec4f0f847b16b1dac4f3b910604
 2021-01-29 16:20:16 +00:00
drh
17988aae5b Merge fixes from trunk. Omit a conditional in 
sqlite3IsLikeFunction() that was made unreachable by this enhancement.

FossilOrigin-Name: 0b42f9eb5dd710991af3cf4b16464b22db9539361d618e50eaa4d43c811577b4
 2021-01-22 20:28:30 +00:00
drh
c2dbf35f49 Fix harmless typos in comments per 
[forum:/forumpost/7849e58dd5|forum post 7849e58dd5]

FossilOrigin-Name: d1e22e2f76cce7eb9f9029646176daef2d9e41c7bb1d3e1da182fbdd0096605c
 2021-01-07 16:10:14 +00:00
drh
4fd4a7a1e9 Do not attempt to take a pointer to the ceil() and floor() functions as 
those routines are intrinsics on some versions of MSVC.

FossilOrigin-Name: e5d7209e118a84537a85c0c9cd2b7ca4cd6ccf04181dc840b19339b4c93840cd
 2021-01-01 01:44:06 +00:00
drh
e5baf5c283 Remove an unnecessary and incorrect #ifdef. Fix harmless compiler warnings. 
FossilOrigin-Name: 31cd1bbfa5b06723288d99d1cb423f88353bdef770b82e9103f71a796d66f660
 2020-12-16 14:20:45 +00:00