bb53ecb1db
Enhancements to the code generator for the IN operator that result in much
...
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
16d511a664
Remove (newly) incorrect preprocessor check to fix build on WinRT.
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FossilOrigin-Name: ba7826542908eac2e14789d183d0b3e35b143fed
2014-08-02 20:44:13 +00:00
4c259e9f40
A better comment on the generated code for the NULL-in-RHS-of-IN detection
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logic.
FossilOrigin-Name: 9bc1c730a366e75b760b58e7a343d39165b2a469
2014-08-01 21:12:35 +00:00
6be515ebe0
Improved detection and handling of NULL values on the RHS of a IN operator.
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FossilOrigin-Name: 468e730036edac22cfeb9ea3515aa16e6bcd6650
2014-08-01 21:00:53 +00:00
e21a6e1dfe
Remove an unnecessary OP_Null in the IN-operator logic. Attempt to clarify
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comments explaining the IN-operator code, though it is not clear that the
comments are correct even yet - more work to be done.
FossilOrigin-Name: c11e55fabbc718cb324ecd3540453c25db98f50c
2014-08-01 18:00:24 +00:00
5c3e9cf9de
Clean up the IN operator code generation logic to make it easier to reason
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about. In the process, improve code generation to omit some unused OP_Null
operations.
FossilOrigin-Name: 7c6fbcfe6ed5739e8e4639b7b123fbf9828cbfc0
2014-08-01 15:51:36 +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
cefc87fca5
Enhance the PRAGMA integrity_check command to detect UNIQUE and NOT NULL
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constraint violations.
FossilOrigin-Name: 9abcf2698c09f4f6a44a68e74f9f6b538f3253d6
2014-08-01 01:40:33 +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
37e08081f3
Omit a pointless OP_Null when processing a value-list RHS of an IN operator
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where the LHS is a rowid.
FossilOrigin-Name: 1361450a9dfe9476e8df98f370a3695752252245
2014-07-31 20:16:08 +00:00
202cb64189
Optimizations to the OS sub-type checking in the Win32 VFS.
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FossilOrigin-Name: 1e5489faff093d6a8e538061e45532f9050e9459
2014-07-31 18:54:01 +00:00
f6296cafc5
Add a missing call to "test_sqlite3_log" to multiplex.test.
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FossilOrigin-Name: 0708f9df23a325349f658741358c5994b5c4c873
2014-07-31 18:14:37 +00:00
e8559837e6
Fix a leaked statement handle in pager2.test.
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FossilOrigin-Name: 47457b0488abcbec2137abf706c1d677563b9ea5
2014-07-31 17:35:40 +00:00
4387006c18
Deactivate the DISTINCT in a SELECT on the right-hand side of an IN operator,
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since it should not make any difference in the output but dues consume extra
memory and CPU time.
FossilOrigin-Name: f4cb53651b1e352fae7378878b830a902bcd9248
2014-07-31 15:44:44 +00:00
0174ffa976
Re-integrate the recent changes from the 'winMutex' branch back into the Win32 mutex subsystem.
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FossilOrigin-Name: 5360ecb0b8891d0c27f3f02d81b6c7b548361a10
2014-07-30 23:11:16 +00:00
d42d0bed94
Add three new static mutexes for use by the application. This is a partial
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import of changes from the threads branch.
FossilOrigin-Name: 3aad01960f92c5e77dba64ac1a6c6b063378fb97
2014-07-30 21:10:12 +00:00
a1a8298c2e
Add the "eForce" parameter to the sqlite3_multiplex_shutdown() entry point
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in test_multiplex.c. Shutdown is forced if true. Shutdown is not done if
there are pending database connections and eForce is false, but an error log
entry is made instead.
FossilOrigin-Name: c7303d0139f7e7f4fa7060b52942e6c6c6d4b622
2014-07-30 15:43:05 +00:00
ac50232d0f
Ensure that the correct number of columns in a UNIQUE index are checked for
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uniqueness, regardless of whether or not the original table has a ROWID or
if the columns are NOT NULL, etc. Ticket [9a6daf340df99ba93c].
FossilOrigin-Name: 6b785e92f279cb65746834d5cd25594fd3333342
2014-07-30 13:56:48 +00:00
a7f37491a7
Enhancements and updates to the Win32 mutex subsystem.
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FossilOrigin-Name: ca9868cdae19045dc522490b34dee0f14d928ebe
2014-07-29 19:54:03 +00:00
edd93c3349
Merge updates from trunk.
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FossilOrigin-Name: 08c9a4ea6353900095a471365a8611a443f5f399
2014-07-29 18:03:36 +00:00
43cfc230ab
Add the SQLITE_TESTCTRL_ISINIT file control.
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FossilOrigin-Name: 8b651d4d6cde7efbc0cc7155948f477477be100e
2014-07-29 14:09:21 +00:00
57ff60b19b
Have calls to the xFilter() method of rtree virtual tables ensure that cursor is initialized before proceeding. Fix for [d2889096e7bdeac].
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FossilOrigin-Name: 8cc41b0bf365af47c2061ffe44c86018945dd239
2014-07-29 11:54:18 +00:00
d6918657d8
Enhancements and updates to the Win32 mutex subsystem.
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FossilOrigin-Name: 18984c321049a759f6619cfa17fb3f4e7b3e08ea
2014-07-29 05:49:02 +00:00
e6bc1ef68f
Remove an unreachable branch from the sqlite3_value_numeric_type() interface.
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FossilOrigin-Name: 5350229b52b18a4961858a30538c5c75e5bd3048
2014-07-26 20:12:56 +00:00
975b4c6e8b
Avoid unnecessary no-op calls to applyNumericAffinity() for a small
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performance improvement.
FossilOrigin-Name: 413d7287977702fa651c0140bd5cf29021fe3e79
2014-07-26 16:47:23 +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
5dad9a3497
Improved comments on VDBE opcodes, for better documentation. No code
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or logic changes.
FossilOrigin-Name: 2d32e4876e0b162730f81e5c2658be12d64a9a99
2014-07-25 18:37:42 +00:00
8af3f772c1
Add constraints (enforced only when SQLITE_DEBUG is enabled) on the use of
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OP_Next and OP_Prev.
FossilOrigin-Name: 2230c74f1efa591770176c9b40e920724a3c39e1
2014-07-25 18:01:06 +00:00
f8c7e053ed
Improve the performance of the ANALYZE command by taking advantage of
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UNIQUE constraints on indices.
FossilOrigin-Name: 114dcf33670fd98a1ebbac0e44f66b2d8bcccddf
2014-07-24 23:23:26 +00:00
d15f87ecfd
Fix a bug in the whereRangeSkipScanEst() procedure (added by
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check-in [d09ca6d5efad3e4cfa]) where it fails to consider the possibility
of a ROWID column when computing the affinity of a table column.
FossilOrigin-Name: 6aea2258dd7d3967900cefe4cd0af48a7ee7e169
2014-07-24 22:41:20 +00:00
b12879fd1a
Avoid trying to allocation zero bytes when analyzing a unique non-null index.
...
FossilOrigin-Name: 85e2badeeb7f7599eb6fd35512f9bd524f0b1b3f
2014-07-24 20:25:16 +00:00
9d793325b0
Avoid change tests when analyzing single-column unique indexes after
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getting past the initial NULL entries.
FossilOrigin-Name: 4690e99c07024f40fafba1db8e4487b287b788a9
2014-07-24 19:54:20 +00:00
ba5b09319e
Add the readfile(FILENAME) and writefile(FILENAME,CONTENT) SQL functions to
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the command-line shell.
FossilOrigin-Name: fb1048cb2b613a0dbfe625a5df05e9dcd736a433
2014-07-24 12:39:59 +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
6976c2123b
In the command-line shell, in CSV output mode, terminate rows with CRNL but
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do not expand NL characters in data into CRNL. Provide the extra -newline
command-line option and the extra argument to .separator to designate an
alternative newline character sequence for CSV output.
FossilOrigin-Name: 16c8ce10e1530731441e6c4538691b71564684ed
2014-07-24 12:09:47 +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
6861b8a13f
Ugh. Consecutive UNIQUE index entries are only distinct if the index is
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on NOT NULL columns. So the previous version was not quite right. This
check-in fixes the problem.
FossilOrigin-Name: 30033f965030a015fad15e532bcaba1314c8cc0f
2014-07-23 19:37:21 +00:00
3b9fab1cb9
Enhancements to the hex literal tests.
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FossilOrigin-Name: a3cc027fa7ca41da23ecd0770a075a48416af020
2014-07-23 19:04:25 +00:00
553818a0aa
Improve the performance of the ANALYZE command by taking advantage of the
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fact that every row of a UNIQUE index is distinct.
FossilOrigin-Name: 3e1e79e1335f7ad33cd35f384f2a063c4aa2253b
2014-07-23 18:36:55 +00:00
11d451eb8a
Updated documentation on sqlite3_temp_directory. No changes to code.
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FossilOrigin-Name: e6225a7bf77a700b318563b1a854b4b3a9e031e1
2014-07-23 15:51:29 +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
5ec659cfcb
Casting hex literals directly from string to float always results in a
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positive number.
FossilOrigin-Name: 4b86ccdf4f4eb4339a5706e10ad24f01b6c3939e
2014-07-23 02:07:11 +00:00
d35588dc21
Reformatting a few test cases for clarity.
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FossilOrigin-Name: 7e1bbacb11a4689b69856450125cae3d045307af
2014-07-23 01:59:47 +00:00
fce4da1b73
Test cases for hex literals.
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FossilOrigin-Name: 19054339c47448bcdfd1f7be35daa3826c409077
2014-07-23 01:56:32 +00:00
28e048c618
Add support for parsing C-style hexadecimal literals.
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FossilOrigin-Name: 34a1f38b7a23c64f5c6e5b34c19a20480be53961
2014-07-23 01:26:51 +00:00
0f65cce825
When running ANALYZE, it is not necessary to check the right-most key column
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for changes since that column will always change if none of the previous
columns have.
FossilOrigin-Name: 48f40861db4fbd10725a2b8b606d44fe16d5bd27
2014-07-22 22:46:54 +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
...
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
drh