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sqlite3_value_nochange
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201 Commits

Author SHA1 Message Date
drh
7e8515d8be The query planner tries to avoids using indexes that use unknown collating 
functions.

FossilOrigin-Name: 02013fc120bf71a8be3550c696a588af8c92f2209f8e5db530624878ddc8aa7e
 2017-12-08 19:37:04 +00:00
drh
9d9c41e25e Remove unnecessary NEVER() and ALWAYS() conditionals. 
FossilOrigin-Name: 1c80c75d4be2f3d44fb18bb4c07eccac2aba79b688215a741317dfc47dc7c2ce
 2017-10-31 03:40:15 +00:00
drh
36494b8bc6 Size and performance optimization for sqlite3Init(). 
FossilOrigin-Name: 776d91284a891bec64d6f649ff17de898b6ac6f66dd3d2afccc394a012a40c7d
 2017-08-25 15:43:34 +00:00
drh
967f8f9e07 Remove an unnecessary branch from the [be436a7f4587ce517ddc] fix. 
FossilOrigin-Name: fb6ca99b88c67414eab425e2b4ddb6a5e2fd48a6b2cd96a34627c86a5b568c9b
 2017-08-17 14:47:56 +00:00
drh
dc6b41ed47 Defer schema resets when the query planner is running. 
Proposed fix for ticket [be436a7f4587ce517].

FossilOrigin-Name: a7bc7752ba0266684f5317e424a4ee9add4af002272082183519e708ab9ffc79
 2017-08-17 02:26:35 +00:00
drh
6903bf6d49 Slightly smaller and faster by allocating Parser objects on the stack. 
FossilOrigin-Name: 436a89b91901851ce21bf0cb997291b48888c52788b904822083d8dfac32b84b
 2017-08-01 20:59:41 +00:00
drh
8257aa8dbe Add the new sqlite3.mDbFlags field. Factor out bits of sqlite3.flags that 
do not interact with PRAGMA statements into sqlite3.mDbFlags.

FossilOrigin-Name: 3808a00f06d372cc531da039d97bd974e4a6576a30cf63bf562f83f186b313b3
 2017-07-26 19:59:13 +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
d0bbe4e9c2 Incorporate recent trunk changes. 
FossilOrigin-Name: 62b8269ba2ff71e2daaa86688698896badd6f6e34ab42fbf92dda7fcda73a230
 2017-06-28 15:56:58 +00:00
drh
169dd928c5 Add the SQLITE_DBCONFIG_ENABLE_QPSG option to activate the query planner 
stability guarantee.  This involves refactoring the sqlite3.flags bitvector
to carve out a free bit to use.

FossilOrigin-Name: 7076e8283ebae1b45a5d85d9538b49b6da399d38c3c6935de100f948f814f6a9
 2017-06-26 13:57:49 +00:00
drh
2c2f392dca Add interfaces sqlite3_prepare_v3() and sqlite3_prepare16_v3() with the 
extra prepFlags argument.  Add the SQLITE_PREPARE_PERSISTENT option as one
bit in that argument.

FossilOrigin-Name: 4a25c5883380fe5990d8180adb58c3bdc7a3d081bc4c69cd4de3cd57074fb251
 2017-06-01 00:54:35 +00:00
drh
cb43a937e5 Allocate Parse objects off of the stack where appropriate for a substantial 
performance increase and a size reduction.

FossilOrigin-Name: ea8affa9e453b201b479162f621b591e7a65a489
 2016-10-03 01:21:51 +00:00
drh
cd9af608e1 Avoid initializing the column-cache section of the Parse object, since entries 
in the cache will be initialized as they are used, and avoiding the initial
memset() saves many CPU cycles.

FossilOrigin-Name: 63cf7eafae5c3c1379edf416c5157010c7c120b5
 2016-09-30 22:24:29 +00:00
drh
9ef5e7708a Add the capability to VACUUM an attached database by specifying the schema 
name as an argument to the VACUUM command.  Since version 2.0, VACUUM has
accepted an argument which was silently ignored.  Now it has meaning.

FossilOrigin-Name: 29d63059b4d2bb612523ac55ebfef040d054a64f
 2016-08-19 14:20:56 +00:00
drh
69c338263a Rename the Db.zName field to Db.zDbSName to make it more descriptive and to 
distinguish it from all of the other "zName" variables scattered throughout
the code.

FossilOrigin-Name: 92a22f01343a898455fd61c3b8e7d7c954f5b569
 2016-08-18 14:33:11 +00:00
mistachkin
fad3039c51 Enhance ability to debug out-of-memory errors. 
FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28
 2016-02-13 23:43:46 +00:00
drh
17a936f84a Minor simplification of schema error reporting. 
FossilOrigin-Name: a8846aeed9992c6c9f1c8bd6e996a4cbe891751e
 2016-02-05 02:50:11 +00:00
drh
4a642b6060 Improvements to the way that OOM errors are processed. 
FossilOrigin-Name: c3ef03478a5788c855b3aef385d43ae7f494f440
 2016-02-05 01:55:27 +00:00
dan
98a4d5a7fa Avoid two more instances of pointer arithmetic on freed pointers. 
FossilOrigin-Name: 2910ef64097b890c9f8929bf609ea2827db7ac97
 2016-01-29 08:38:35 +00:00
drh
c615097d3d Remove an assert() that can be false if compiled with SQLITE_USE_ALLOCA. 
FossilOrigin-Name: f0a551edf87ef061deae34d88b02c3b484ae9adc
 2016-01-23 14:05:27 +00:00
drh
055f298ad4 Work toward making the schema parsing logic simplier and more compact. 
FossilOrigin-Name: c52ca2c0662bb30ab34574f933429512655b19ff
 2016-01-15 15:06:41 +00:00
drh
22c17b8bf5 Simplifications to error message processing. Fix a possible problem in error 
message formatting when vacuuming a database with a corrupt schema.

FossilOrigin-Name: 56ef98a04765c34c1c2f3ed7a6f03a732f3b886e
 2015-05-15 04:13:15 +00:00
drh
22ecef5c20 When parsing the schema, ignore any SQL that does not begin with "CREATE". 
FossilOrigin-Name: d3c00d61581c8ba6dce5618391432d3af8d324d4
 2015-04-16 00:26:03 +00:00
drh
9bd3cc4681 Add extra tests to threadtest4.c. Fix a benign data race accessing the 
text encoding using ENC(db).

FossilOrigin-Name: d7bb7ea4ab97ad26f4c84c9b8dc2827010093803
 2014-12-12 23:17:54 +00:00
drh
9ca95730e3 Add the SQLITE_ENABLE_API_ARMOR compile-time option. This is a work in 
progress and is not yet completely functional.

FossilOrigin-Name: c297a84bc678f81ffc0aa9139ab73f0ca87c1971
 2014-10-24 00:35:58 +00:00
drh
b2445d5ee8 Move user authentication blocking from sqlite3_prepare() over to the 
table lock generator, thus allowing SQL statements (like 
"PRAGMA locking_mode") that do not touch database content to run
prior to authentication.

FossilOrigin-Name: 70121e7cf868b7d6d19bf98794ddc3809a901456
 2014-09-11 14:01:41 +00:00
drh
32c6a48b5e Add support for the extra parameter on the sqlite3_set_authorizer() callback 
and support for failing an ATTACH with an authentication-required database
using bad credentials.  The extension is now feature complete, but much
testing and bug-fixing remains.

FossilOrigin-Name: 596e728b0eb19a34c888e33d4d37978ca2bf1e00
 2014-09-11 13:44:52 +00:00
drh
09e60541ae Complete the implementation of the various APIs. Fix several problems. 
This is another incremental check-in that does not completely work.

FossilOrigin-Name: 4eaaa7fa87aa912d24f8b35440ab60310dc08310
 2014-09-10 22:46:46 +00:00
drh
f442e33e3a Add the ".user" shell command and implement the sqlite3_user_add() 
routine.  Incremental check-in.  The code compiles but does not work.

FossilOrigin-Name: a0455f9deb603bf91684158d911269622720fc1a
 2014-09-10 19:01:14 +00:00
drh
e933b83f02 Further ideas on user authentication. Not yet working code. 
FossilOrigin-Name: c8171ecd0d6f097c9e95d5f6643bae8d67f44750
 2014-09-10 17:34:28 +00:00
drh
d45309796b Non-working preliminary implementation attempts on user authentication. 
FossilOrigin-Name: 8440f093bac19a41d44ee352744354eab897fe4e
 2014-09-09 14:47:53 +00:00
drh
13f40da31d Split the sqlite3Error() routine into sqlite3Error() and 
sqlite3ErrorWithMsg(), for a slight size reduction and performance increase.

FossilOrigin-Name: cf561d1f0bb60b3d638632d20bd686dda4fa4a04
 2014-08-22 18:00:11 +00:00
drh
73d5b8f550 Move elements of the Vdbe object that are only used during statement 
preparation out into the Parse object.

FossilOrigin-Name: c289a253c0c053ac8fc344efe138262c327d8096
 2013-12-23 19:09:07 +00:00
drh
f30a969b80 Rework the logic that factors constant expressions out of inner loops, making 
it both simpler and faster.

FossilOrigin-Name: 8dc5c76c766828d7c28090bec30ff48227e7b140
 2013-11-15 01:10:18 +00:00
drh
7232ad0700 Make sure the sqlite3_prepare16 and sqlite3_prepare16_v2 interfaces do not 
read past a zero-terminator if the nBytes parameter is too large.

FossilOrigin-Name: 20dba3a7fb3e7078b95af3beca948467a3af6a89
 2013-07-16 23:26:43 +00:00
drh
c7f0d229a7 Fix compiler warnings. Fix a harmless off-by-one error in the solver. 
FossilOrigin-Name: 10021941d0258951b916e788881df140113f0597
 2013-06-19 03:27:12 +00:00
drh
8e23daf372 Fix the Parse.nQueryLoop state variable to work with NGQP. 
FossilOrigin-Name: f1cac24f06b9c71cfa472fdcf2da4cd8689a7cc3
 2013-06-11 13:30:04 +00:00
drh
60625313b0 Increase the default SQLITE_MAX_SCHEMA_RETRY to 50. Make sure that macro 
covers every case where a prepared statement might need to be reprepared due
to a schema change.  The sqlite3_exec() interface now uses 
sqlite3_prepare_v2().

FossilOrigin-Name: c1d7304c80c4a6244c8a9f6fad1eebd0f339c724
 2013-04-06 18:06:51 +00:00
mistachkin
48864df97d Many spelling fixes in comments. No changes to code. 
FossilOrigin-Name: 6f6e2d50941e444ebc83604daddcc034137a05b7
 2013-03-21 21:20:32 +00:00
dan
dbd4d5fc77 If SQLITE_OMIT_UTF16 is defined, avoid setting the 'enc' field of Schema objects to any value except SQLITE_UTF8. Otherwise, assert() statements may fail or spurious SQLITE_NOMEM errors may be returned at the vdbe level later on. 
FossilOrigin-Name: 69746ef787680a4b7590bd1d3c86b229d9d0dac4
 2013-03-08 07:10:37 +00:00
mistachkin
ba2bba3c32 Silence harmless compiler warning seen with SQLITE_OMIT_DEPRECATED. 
FossilOrigin-Name: c5cee969322d14114e4136510c3891a2e743520d
 2012-09-18 23:21:32 +00:00
drh
a19b89627e Make sure the Index.azColl pointers do not point to connection-specific memory. 
Also, remove an unnecessary reinitialization to sqlite3.pDfltColl.

FossilOrigin-Name: c469850b2eb61a63150cc5fc7d2fe98f0b5abffb
 2012-06-06 10:56:22 +00:00
drh
81028a455d The former sqlite3ResetInternalSchema() routine was really two different 
routines, selected by parameter, each with a confused mission.  So split
this routine up into three separate smaller routines, calling each
separately as needed.  Hopefully this will make further refactoring and
schema reset collateral damage containment easier.

FossilOrigin-Name: aa0c3493d3647d7efe527067e9fcccefda8e3008
 2012-05-15 18:28:27 +00:00
drh
74ea19b489 Add an assert() that verifies that the statement pointer from 
the sqlite3_prepare() family of functions is always NULL if the routines
return other than SQLITE_OK.

FossilOrigin-Name: 0bb1cfc63f982db7b29c8e6be6698a6dad100f70
 2012-05-14 12:20:54 +00:00
drh
e73c91496f Minor changes needed to restore full branch test coverage. 
FossilOrigin-Name: bc10a753579b65ba4604867204b7b3d8383f3ac7
 2011-11-09 16:12:24 +00:00
drh
2b89fbcb1e Do not do a backup if the number of reserved bytes in the source and 
destination do not match.  Try to make the match, but if unable fail.

FossilOrigin-Name: 0ca8a2332b28d88585dc890e5162b095e783fc20
 2011-04-09 02:09:44 +00:00
drh
cdf011dcc4 Additional schema mutex checks for sqlite3RootPageMoved(). 
Reduce the scope of sqlite3ResetInternalSchema() in a few places.

FossilOrigin-Name: 39c00907833413c0d97d3e06fdda967b825d23ea
 2011-04-04 21:25:28 +00:00
drh
2120608e0f Add a description of access rules for the Schema object and lots of asserts 
to verify that the access rules are followed.

FossilOrigin-Name: ae8374af057b6e6546e9265148cfffe32fcb0849
 2011-04-04 18:22:02 +00:00
drh
c7792fa052 Begin a series of changes designed to reduce the scope and frequency of 
invalidating schemas.  Design goals are that the internal schema should
never be deleted out from under a prepared statement that is running and
that all prepared statements should be expired if the schema is invalidated.
At the same time, minimize the number of schema invalidations.  This change
merely revises the sqlite3ResetInternalSchema() function to use -1 as the
wildcard for "all" rather than 0, so that we can reset the main schema
independently of all the others.

FossilOrigin-Name: 6a8ad6e31e0d2b8a5ace38faf0efd805155ee5f3
 2011-04-02 16:28:52 +00:00
drh
d50ffc416f Fix additional cases of possible signed integer overflow, especially with 
regard to negation.

FossilOrigin-Name: 2d5800bd8cfc7d7f5578a71b1aeaa74b2ec4b372
 2011-03-08 02:38:28 +00:00