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380 Commits

Author SHA1 Message Date
drh 0cdbe1aee0 Make the internal dynamic string interface available to extensions using 
the new sqlite3_str object and its associated methods.  This is mostly just
a renaming of internal objects and methods to use external names, through
there are a few small wrapper functions.

FossilOrigin-Name: 87f261f0cb800b06ad786f6df16f2c4dddd0d93dfdcc77b4a4eaa22920b56bf1
 2018-05-09 13:46:26 +00:00
drh c86d82f27d Fix misplaced testcase() macros from the previous check-in. 
FossilOrigin-Name: 3aed949a18a251c5795f21f0385c205a127502b7e9cf06bc7f4c763951cd7984
 2018-02-10 02:31:30 +00:00
drh f313952097 Improve the performance of the built-in REPLACE() function in cases where 
it does many substitutions that make the string larger.  OSSFuzz is reporting
intermittant timeouts when running a test where it does a REPLACE() on a 
930KB random blob. Perhaps this enhancement will fix that.

FossilOrigin-Name: fab2c2b07b5d3cd851db3e6f5c8a44155e32b0df22905ea33412b153b825a928
 2018-02-09 23:25:14 +00:00
drh 21d5978422 Remove an unreachable branch from sqlite3SkipAccumulatorLoad(). 
FossilOrigin-Name: 8b9c8eab60b692e45c55a718d76b70e63040416040696907463692cbf83fb0c5
 2018-01-23 19:24:54 +00:00
drh 7ea3469e53 Slightly faster implementation of the length() SQL function. 
FossilOrigin-Name: 9a4199aedb039141a50a68943ef863d7df9637ada318793cce6c12b9d39bcdc5
 2018-01-23 04:22:33 +00:00
drh f09ac0b336 Slightly faster function dispatch in the virtual machine by avoiding 
unnecessary reinitialization of variables that are already correctly
initialized.

FossilOrigin-Name: edd4e6876cc08ab907bb21f075380de946562d4c56a04923760848b4b11536ac
 2018-01-23 03:44:06 +00:00
drh 35100fb194 Remove the snarky "_supported_" qualifier from the name of the 
sqlite_offset() SQL function.

FossilOrigin-Name: a6eee0fcd89d3958f8720ebdb5f0a8558b4795d747128091dae283eb81c4f74f
 2018-01-04 19:20:37 +00:00
drh 092457b18c Change the function name to sqlite_unsupported_offset(X). Only enable the 
function if compiled with -DSQLITE_ENABLE_OFFSET_SQL_FUNC.  The makefiles add
that definition to shell builds.

FossilOrigin-Name: 7a7f826e324b1a2c332e2f1d0740fd0babffcaca6275a798572f02ad367b99ab
 2017-12-29 15:04:49 +00:00
drh 2fc865c115 Add an experimental location(X) SQL function that attempt to return the 
location of the payload within the database for the record that contains
column X.  location(X) returns NULL if X is not an ordinary table column or
if SQLite cannot figure out the location because it is using a covering index.

FossilOrigin-Name: 51be9558164301c5dd4df23ab8b3e67de0b522f8d36f79f3d84d45d3dc2a83a4
 2017-12-16 20:20:37 +00:00
drh eba21f9eb2 Improve the performance of the LIKE operator by using strcspn() to aid 
wildcard matching.

FossilOrigin-Name: 37284d4e8f501a37c582aa899419a3dfe0932e2a8e2ef2fdf59addd1d3cdacb4
 2017-10-30 18:49:11 +00:00
drh f49759bf03 Fix a few over-length source code lines. No functional changes. 
FossilOrigin-Name: 1783c54ce9dcb4b2c4f2a66f6d3315e646b71b54a8899fc32a7bf0f935a21f7f
 2017-08-25 19:51:51 +00:00
drh 1d42ea71c2 Enhance the like optimization so that it works with an ESCAPE clause. 
FossilOrigin-Name: f5d330f495d07a704e115595bbdf5422ddb68fd8191114c5a12c9c873d983f7c
 2017-07-27 20:24:29 +00:00
drh 3cef364966 Add requirements marks for some of the new features in the 3.20 release. 
FossilOrigin-Name: 264238671379306b14d62a6ddaefd2a20acd34ca77276b6ce872253160fe0146
 2017-07-14 19:22:08 +00:00
drh 9d8e401c2d More compact implementation of the typeof() SQL function. 
FossilOrigin-Name: efb4aab0caa4145732a5438cc2a193bc12c455b4007220564d240e75900ea8ad
 2017-07-06 13:51:50 +00:00
drh b30574bcae Simplified OOM detection in the instr() SQL function. 
FossilOrigin-Name: 6d85eb5736781b43aa674d9544c7523b849b4e634f371702f8764b33e22e1e9f
 2017-03-16 14:28:52 +00:00
dan 116b56a2cc Fix a crash that could follow an OOM condition in the instr() SQL function. 
FossilOrigin-Name: 6e59e903e4e956617bddef0b94e5cae02d724ac8145940b57ab5b0f628759736
 2017-03-16 12:11:07 +00:00
drh 5424075137 Put the affinity() function implementation inside of #ifdef SQLITE_DEBUG. 
FossilOrigin-Name: f778f58ae4ea3e16f51b94591a2c1e563dcb0cde
 2017-01-03 14:39:30 +00:00
drh 01e64a1704 Merge all the latest changes from trunk. 
FossilOrigin-Name: c27cd8a8127b81d3176f6a5b9915c9b3c69574fb
 2017-01-03 14:30:28 +00:00
dan 3043b53222 Fix a crash that could occur following an OOM in the group_concat() function 
if the second argument is an SQLITE_BLOB value.

FossilOrigin-Name: 14d855d2b2b5b3485e0673d11405db7266b34c6d
 2016-12-30 17:40:14 +00:00
drh 1d081ab39e Strengthen the defense against OOM in the instr() SQL function. 
FossilOrigin-Name: a0971e713682a73d8c7c20511db256c20d2f6388
 2016-12-30 15:16:20 +00:00
dan 895decf6b5 Avoid passing NULL pointers to memcmp() or memcpy(), even when the 
"number-of-bytes" argument is passed 0.

FossilOrigin-Name: 56ff72ab44288296efc99a608f7edc4346366a50
 2016-12-30 14:15:56 +00:00
drh a1a523a5bb Add the built-in affinity() SQL function. 
FossilOrigin-Name: 57e40e1cb1bcd3dd8473d2fdeecc9c7ff3d6192b
 2016-12-26 00:18:36 +00:00
drh 698a01ca2f Faster version of patternCompare() that uses new return values rather than 
an extra parameter to communicate wildcard information back up to parent
searches.

FossilOrigin-Name: a1e2b6ce3af690ae91bda3d056357205c4018da7
 2016-12-01 18:49:40 +00:00
dan 1a4a73764c Modify the patternCompare() function (used for GLOB, LIKE) to better handle 
patterns containing multiple wildcard characters ("*", "%").

FossilOrigin-Name: c5e5614d98a752738c081fecdd1e349a1a92b0e5
 2016-12-01 17:34:59 +00:00
dan a2bfa046ea Avoid a crash that can occur after an obscure OOM in the built-in INSTR() 
function.

FossilOrigin-Name: b86b79c442a58d10aa005ba4f34095375a88d242
 2016-11-04 12:05:29 +00:00
drh cc15313cc9 Add the experimental SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION compile-time option. 
When enabled, the "unknown function" error is suppressed for EXPLAIN and
a no-op function named "unknown()" is substituted.  This facilitiates using
the command-line shell to analyze queries from applications that contain
many application-defined functions that are not normally available to the
shell.

FossilOrigin-Name: b7f30a9ff20d580fdaecdcf2b644d09ad6c2575e
 2016-08-04 12:35:17 +00:00
drh c80937a5f5 Small performance improvement in the LIKE function. 
FossilOrigin-Name: 5fb0c35459cf7a8662bf8cd84ac345f6fafda6cc
 2016-06-06 01:48:14 +00:00
drh f602a16123 Test cases for SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION. 
FossilOrigin-Name: debafa5efd37ac60e030d0963ce8e7c4f51a0f10
 2016-04-21 01:58:21 +00:00
drh 191dd06195 Revert sqlite3_enable_load_extension() to its original long-standing behavior. 
Add SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION which will enable only the C-API and
leave the SQL function disabled.

FossilOrigin-Name: b2ae5bfa32e608625bd177907596df3dbc2212e1
 2016-04-21 01:30:09 +00:00
drh 1a55dedf7b <b>API Change:</b> Modify sqlite3_enable_load_extension() so that it only 
enables/disables the load_extension() SQL function, and leaves the C-APIs
enabled at all times.  In this way, applications can enable extension loading
for the C interface without having to expose that capability to the SQL.

FossilOrigin-Name: edb454e45ae008e051e2f48d704a855b0c3e4be9
 2016-04-20 00:30:05 +00:00
drh 80738d9c3e Improvements to the application-defined function mechanism so that it is 
more compact and runs faster, especially when the application defines
thousands of new SQL functions.

FossilOrigin-Name: 3201fbcc5105d23132e6b8b7ac825e66af4f8a39
 2016-02-15 00:34:16 +00:00
drh 4a642b6060 Improvements to the way that OOM errors are processed. 
FossilOrigin-Name: c3ef03478a5788c855b3aef385d43ae7f494f440
 2016-02-05 01:55:27 +00:00
drh 5f4a686f8c Simplification and size reduction to the printf logic. Remove the bFlags 
parameter from sqlite3VXPrintf() and sqlite3XPrintf().  Use sqlite3XPrintf()
instead of sqlite3_snprintf() for rendering P4 values in EXPLAIN output.

FossilOrigin-Name: 0bdb41c45aa1cc8e5c136aaa6605d54b401483bd
 2016-01-30 12:50:25 +00:00
drh fb3972602c Case folding in the LIKE operator should look at all bits of the character, 
not just the lower 8 bits.  Fix for ticket [80369eddd5c94].  This is a
back-out of check-in [0a99a8c4facf] with a testcase added.

FossilOrigin-Name: 204432ee72fda8e82d244c4aa18de7ec4811b8e1
 2016-01-20 14:22:41 +00:00
drh 07e8347221 Slightly smaller and faster LIKE/GLOB comparison implementation. 
FossilOrigin-Name: 5dddcc78eec5bcd0c7e8fe1b70875ce775488f0c
 2016-01-11 03:48:18 +00:00
drh 31d175dde4 Remove unnecessary tests from the LIKE pattern matcher. Slightly faster and 
slightly smaller, and it should also now works with EBCDIC.

FossilOrigin-Name: 0a99a8c4facf65ec67d8d86108c9a3f723f7cbd6
 2015-12-30 14:06:22 +00:00
drh 41d2e66ef3 Add the SQLITE_LIKE_DOESNT_MATCH_BLOBS compile-time option. 
FossilOrigin-Name: 9e1d6d4c391ff90077f0d1cdeb567969fee9f747
 2015-12-01 21:23:07 +00:00
drh 8b4a94adc1 Add the sqlite3_strlike() interface, which might be useful for implementing 
LIKE operators on virtual tables.

FossilOrigin-Name: e70ec71d6883f2f8fc75301ff985bccb5aa06127
 2015-11-24 21:23:59 +00:00
drh 03bf26d90d Not only date/time functions, but also functions like sqlite_version() and 
changes() need to be prohibited from use inside of indexes.

FossilOrigin-Name: 487131303980f15dd5e1b6695b4f29efda229eb8
 2015-08-31 21:16:36 +00:00
drh 6bacdc21ae Fix compiler warnings. Get the new sqlite3_result_zeroblob64() working 
on loadable extensions.

FossilOrigin-Name: f8991e6f726485301c80d2dbb05e7d5c0d283b5d
 2015-07-24 17:14:03 +00:00
dan a4d5ae8fa2 Add the sqlite3_result_zeroblob64() API. Use it in the SQL zeroblob() function. 
FossilOrigin-Name: c6445b9fb4d7d1a8479436d7d183bad754a01615
 2015-07-24 16:24:37 +00:00
drh 53e66c3cda More robust handling of zeroblob() with oversized arguments. Fix fuzzcheck 
so that it can be run with limited heap memory.

FossilOrigin-Name: 4e3e516a42059c97f42a7eb59bdf5cded0ff843a
 2015-07-24 15:49:23 +00:00
drh b0870486aa Performance optimization and comment fixes for the LIKE and GLOB operators. 
FossilOrigin-Name: c89d772628564a808173f6f73bc1798ec714276b
 2015-06-17 13:20:54 +00:00
drh c049057242 Cleanup of the sqlite3StrAccumInit() function. No functionality changes. 
FossilOrigin-Name: 7952c32268aa650d9ee946d5bfe190f712e3bbe6
 2015-05-02 11:45:53 +00:00
drh f3cdcdccbe Use sqlite3_malloc64() in place of sqlite3_malloc() internally. 
FossilOrigin-Name: 48f553b05c05373c0af4b9c3a542979db3a2ee19
 2015-04-29 16:50:28 +00:00
drh a9e03b1b82 The valueFromFunction() routine is better able to handle OOM errors. 
Omit unreachable branches.

FossilOrigin-Name: 8fb6bd9be59d6b04e922d7b246aaefd4851539b6
 2015-03-12 06:46:52 +00:00
drh 16897072b5 Refactor some jump opcodes in the VDBE. Add JumpZeroIncr and DecrJumpZero. 
Fix the LIKE optimization to work with DESC sort order.

FossilOrigin-Name: 26cb5145bf52f8c3fffa8c69b6c24aee4d974883
 2015-03-07 00:57:37 +00:00
drh 883ad04985 First small steps toward brining trunk and apple-osx closer together. 
FossilOrigin-Name: 28284ccc0d7301503f6d2d7bee9093738d52e331
 2015-02-19 00:29:11 +00:00
drh 643091f071 Fix a typo in a requirements mark on the abs() SQL function. 
FossilOrigin-Name: b1e6c02f8b9a2afaa12ac15a33e3f698c3be27d6
 2014-11-20 23:21:23 +00:00
drh a15cc47f81 Simplifications to the SQL function and aggregate calling procedures. 
FossilOrigin-Name: 3467049a1705b49905ea88a5c6becb6fe318f2fa
 2014-09-25 13:17:30 +00:00