6b2129aaaf
Disable worker threads when SQLITE_THREADSAFE=0. Set the default compile-time
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maximum number of worker threads to 8 and honor the
SQLITE_DEFAULT_WORKER_THREADS compile-time constant (which defaults to 0).
FossilOrigin-Name: 33fa0410499900dd8beb44b9a8ffbd9f4b68c8d8
2014-08-29 19:06:07 +00:00
111544cbb4
Add SQLITE_LIMIT_WORKER_THREADS for controlling the maximum number of
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worker threads.
FossilOrigin-Name: 1b598c68f32db635d1cea1373bedc434aa60cf08
2014-08-29 16:20:47 +00:00
028696c4cc
Remove the SQLITE_CONFIG_WORKER_THREADS configuration parameter. The number
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of worker threads in the sorter is now determined only by the
PRAGMA threads=N setting.
FossilOrigin-Name: e3305d4b4efcbe06945ce7f6ec0f2e864244aaf9
2014-08-25 23:44:44 +00:00
034596153d
Query or change the maximum number of worker threads allowed on each
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database connection separately using the "PRAGMA threads" command.
FossilOrigin-Name: 29c5e8a7c9d7ce349a1e1d72082d23450e877b45
2014-08-25 15:13:22 +00:00
4d015c6902
Merge the recent performance enhancements implemented on trunk into the
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threads branch.
FossilOrigin-Name: dfdc900f5d1a31ee5c5f35a630c4a8253e69093b
2014-08-25 13:27:02 +00:00
2f2b2b8580
Performance enhancement in sqlite3PutVarint().
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FossilOrigin-Name: a929be551924144c9bc7aab608404d59e479abb5
2014-08-22 18:48:25 +00:00
13f40da31d
Split the sqlite3Error() routine into sqlite3Error() and
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sqlite3ErrorWithMsg(), for a slight size reduction and performance increase.
FossilOrigin-Name: cf561d1f0bb60b3d638632d20bd686dda4fa4a04
2014-08-22 18:00:11 +00:00
14a924a5cd
Get the sqlite3VdbeSerialGet() routine to run faster by avoiding the use
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of local variables.
FossilOrigin-Name: 8267d82174099e548a4f78d06af0c6324c89b83d
2014-08-22 14:34:05 +00:00
da2e5862d1
Merge all recent changes from trunk.
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FossilOrigin-Name: a353a8515fb2eff86042d0c33e39772f4d04e0b3
2014-08-06 02:03:35 +00:00
42191f6248
Add the ability to evaluate IN operators as a sequence of comparisons as
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an alternative to the long-standing algorithm of building a lookup table.
Use the new implementation in circumstances where it is likely to be faster,
such as when the RHS of the IN changes between successive evaluations.
FossilOrigin-Name: 952868216854e8355edf57af62bd1a6bcb70ce61
2014-08-05 19:16:22 +00:00
2c5e35ffd1
Rename the internal Schema.flags field to Schema.schemaFlags.
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FossilOrigin-Name: 5ae80b3c8f032528359c8c762505ce24da8db96f
2014-08-05 11:04:21 +00:00
bb53ecb1db
Enhancements to the code generator for the IN operator that result in much
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faster queries in some cases, for example when the RHS of the IN operator
changes for each row of a large table scan.
FossilOrigin-Name: 436e884215e2b33ca3fbb555362237b12827c07a
2014-08-02 21:03:33 +00:00
e80c9b9ad5
The idea of coding IN operator with a short list on the RHS as an OR expression
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turns out to be helpful. If the list is of length 1 or 2, the OR expression
is very slightly faster, but the ephemeral table approach is clearly better for
all list lengths greater than 2. Better to keep the code simple.
FossilOrigin-Name: e13175d3579e1045165bab091b3b28951d691704
2014-08-01 15:34:36 +00:00
3a85625d87
Begin making changes to the IN operator in an attempt to make it run faster
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and to make the code easier to understand.
FossilOrigin-Name: ee0fd6aaf94cda1dce3fe752bfe3b0f83e0043f1
2014-08-01 14:46:57 +00:00
5f1d1d9c87
Refactoring: Change "pIndex->onError!=OE_None" to use a macro:
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"IsUniqueIndex(pIndex)". Easier to understand that way.
FossilOrigin-Name: e75b26ee357bb3d3c1a539b05d633ebf314726d7
2014-07-31 22:59:04 +00:00
2b49327d08
Fix the build on windows.
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FossilOrigin-Name: 2773a5f9879a106a89a3d0bc3c5bfdcb2fe43c7c
2014-07-29 00:23:08 +00:00
966d9f267f
Merge recent trunk changes into the threads branch.
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FossilOrigin-Name: 163c247bd8280ab14fe577329c631c8bd884707f
2014-07-28 15:01:37 +00:00
eac5bd7870
Try to fix harmless compiler warnings reported by Fortify.
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FossilOrigin-Name: e0fa6fdc14ac5458f9200cbae124f8025ea534ea
2014-07-25 21:35:39 +00:00
2bd2c29a95
Merge all recent trunk changes into the threads branch.
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FossilOrigin-Name: 770685892c8f09b9cddb2fbb2877cfb291e19425
2014-07-24 16:54:28 +00:00
c4747f2314
Add support for hexadecimal integer literals in the parser.
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FossilOrigin-Name: f8f79f28785db716b10c3bc9d6652b98253fd125
2014-07-24 12:19:41 +00:00
dbd9486d5b
Add experimental "costmult" logic. Only enabled when compiled with
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-DSQLITE_ENABLE_COSTMULT.
FossilOrigin-Name: 729ece40885ed7f52c5981364833fc62281a388b
2014-07-23 23:57:42 +00:00
1b7ddc5915
Remove a surplus function prototype. #ifdef code that is not used when
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hex integers are omitted at compile time.
FossilOrigin-Name: a5b383e077e4b277a65920f7cc202f32f07aa9ee
2014-07-23 14:52:05 +00:00
9296c18a50
Change the hex literal processing so that only the SQL parser understands
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hex literals. Casting and coercing string literals into numeric values does
not understand hexadecimal integers. This preserves backwards compatibility.
Also: Throw an error on any hex literal that is too big to fit into 64 bits.
FossilOrigin-Name: 6c6f0de59bf96b79c8ace8c9bfe48c7a6a306a50
2014-07-23 13:40:49 +00:00
3526319b48
Add the OP_ReopenIdx opcode that works like OP_OpenRead except that it becomes
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a no-op if the cursor is already open on the same index. Update the
OR-optimization logic to make use of OP_ReopenIdx in order to avoid
unnecessary cursor open requests sent to the B-Tree layer.
FossilOrigin-Name: 77f412caf0192d3e7fecb377d6d72123d8b64424
2014-07-22 20:02:19 +00:00
a45fdc7b1e
The optimization of check-in [b67a6e33f2] does not work (it generates
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incorrect VDBE code) if an OR term is AND-ed with a constant expression.
So back that optimization out and add a test case to make sure it does not
get added back in.
FossilOrigin-Name: eed754fe93644f4df082eac0c0a7ffc5c78ccd10
2014-07-22 19:14:42 +00:00
53ad7e48ab
For the OR-optimization, avoid generating OP_OpenRead opcodes that reopen
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exactly the same index.
FossilOrigin-Name: b67a6e33f23ce5f5d9a545fa9d6700a7ed636901
2014-07-22 00:40:45 +00:00
a7ab6d8165
Allow the SQLITE_MAX_ATTACHED compile-time option to be larger than 62. The
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default limit on the number of attached databases remains 10.
FossilOrigin-Name: 1a817ae2f35fa0396148dda2782cd4f919bf5c6f
2014-07-21 15:44:39 +00:00
6614181610
Merge the latest trunk changes into the threads branch.
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FossilOrigin-Name: ae23a65eb1547fbe8b86ab71477071990a22d31d
2014-06-30 20:25:03 +00:00
b0b8290ecb
Attempt to use sqlite_stat4 data to estimate the number of rows visited by a range query that uses a skip-scan. This code is largely untested.
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FossilOrigin-Name: 01dc8102592427b71a18c2cb82301d2266dd59c2
2014-06-26 20:21:46 +00:00
ff14013496
Merge changes from the trunk into the threads branch.
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FossilOrigin-Name: 416cb091267de91b9cadee9f7453b8627570b7d3
2014-05-29 20:24:20 +00:00
48dd1d8e28
Change the name of the Index.autoIndex field to Index.idxType and provide
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symbolic names for the various values of that field rather than using
magic numbers.
FossilOrigin-Name: d16e575dacc811de0f7b58a0d1cd243678dce6c5
2014-05-27 18:18:58 +00:00
d25c69ef39
Merge all recent changes from trunk, and especially the new sqlite3FaultSim()
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interface.
FossilOrigin-Name: 43fcbd9116401f30781fdcbe55d1674d6b96311b
2014-05-16 14:27:05 +00:00
c007f61bb0
Repurpose the SQLITE_TESTCTRL_FAULT_INSTALL test-control to register a
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callback to be invoked by sqlite3FaultSim(). That test-control has been
unused since 2008-06-20 and was never used in any official release.
FossilOrigin-Name: 0d43a7ad9abe821e33e0bf83a997aa4461b1e3f2
2014-05-16 14:17:01 +00:00
a09c8855b7
Add the SQLITE_DEFAULT_WORKER_THREADS compile-time option.
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Fix a NULL-pointer dereference that can occur following OOM.
FossilOrigin-Name: e0dea89b3e9f295f80210fcca007681bf1b08692
2014-05-03 11:22:09 +00:00
2ae56f50ce
Merge orderby-planning with this branch.
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FossilOrigin-Name: d9549de31741239ece060e448b592ce8fc5b8042
2014-05-02 18:05:38 +00:00
224155dd1c
Fix long-standing typos in comments.
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FossilOrigin-Name: b9f91317c34d07769a95dc2f905a6ccabceb64a3
2014-04-30 13:19:09 +00:00
8ad1d8ba38
If the user provides likelihood() data for a WHERE clause term used as part of an index key, have the planner use it when calculating the expected number of rows visited by the loop.
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FossilOrigin-Name: c51efaa5d29ee0a91b9e6a83a8dd82530670811a
2014-04-25 20:22:45 +00:00
cfc9df76e1
Store values loaded from the stat1 table as logarithmic values in memory.
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FossilOrigin-Name: 1bd74c49ddab6f53bb6eaa57907eff44c2580dd6
2014-04-25 15:01:01 +00:00
9e0ed8d4ec
Merge all recent trunk changes into the threads branch.
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FossilOrigin-Name: e2c9f71a451e44040624b9f255b4510743513019
2014-04-23 12:57:55 +00:00
374cd78c1d
Avoid discarding an ORDER BY clause in the case where an identical GROUP BY clauses uses an index to group, but not sort, the rows. Fix for [b75a9ca6b0].
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FossilOrigin-Name: de9a490f594183f337a2ec9e0f87792eac83548b
2014-04-21 13:21:56 +00:00
e9af1894e3
Merge recent trunk changes into the threads branch.
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FossilOrigin-Name: 8729aa3e3ed1da2e15408ef8705cbe185cd2a5ac
2014-04-18 12:38:54 +00:00
71794dbaeb
Add the SQLITE_RUNTIME_BYTEORDER compile-time option to force SQLite to check
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the processor byte-order at run-time. Add additional compile-time byte order
checks for ARM, PPC, and SPARC.
FossilOrigin-Name: 2c5363873a6f990a0abaacac6303acd46b48befc
2014-04-18 00:49:29 +00:00
2cf4acbd9f
Add the SQLITE_TESTCTRL_BYTEORDER test control to interrogate SQLite's notion
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of the processor byte order and whether the byte order is known at compile-time
or determined at run-time.
FossilOrigin-Name: 9c6961967ae00e563ebe2859eaf2639a79f2cb01
2014-04-18 00:06:02 +00:00
d249090450
Remove the unused second argument from sqlite3ExprCachePop(). Add an
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ALWAYS() on an always-true conditional in sqlite3VdbeResolveLabel().
FossilOrigin-Name: ab23abf392175d3e256ff619b13abbbe732a49ed
2014-04-13 19:28:15 +00:00
87744513e7
Make sure column cache elements are cleared correctly when jumping over
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code for key generation in a partial index.
Fix for ticket [2ea3e9fe6379fc3f6].
FossilOrigin-Name: 3122b8364082be783821da01d4af2af6a9586327
2014-04-13 19:15:49 +00:00
d83cad235a
Modify the OR-clause handling so that it can safely deal with OR-clause
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with 17 or more terms. Fix for ticket [10fb063b1179be53ea0b53bb].
FossilOrigin-Name: a67b5312f63909737c052fe58ab5772d45530d49
2014-04-10 02:24:48 +00:00
bf20a35d5f
Fix harmless compiler warnings.
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FossilOrigin-Name: e54dded2012f0ab486ee138e9bd57c528af33980
2014-04-04 22:44:59 +00:00
8930c2ab0c
Fix an integer overflow problem in the sorter.
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FossilOrigin-Name: 9d3351b8d713232133dad149c73fb2a27c72abb1
2014-04-03 16:25:29 +00:00
38fdead890
Fix a problem with OOM handling in the sorter code.
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FossilOrigin-Name: 59cd5229e2b5be5272cf57c7e7d09e97d16a5425
2014-04-01 10:19:02 +00:00
b3f56fdb69
Add the SQLITE_MAX_WORKER_THREADS compile time option. And the SQLITE_CONFIG_WORKER_THREADS sqlite3_config() switch.
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FossilOrigin-Name: 2774710df8cd2bfaca49888c69f1b01c0ddadf9a
2014-03-31 19:57:34 +00:00
drh