7a48480d07
Fix harmless compiler warnings.
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FossilOrigin-Name: 74eadeec34c4b19cf5f8b7f648db3b7ad601a00e
2012-03-16 00:28:11 +00:00
331b67c151
Candidate fix for the optimizer problem described in ticket
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[b7c8682cc17f3] which can causes a LEFT JOIN to be changed
into a INNER JOIN if there are OR terms in the WHERE clause.
FossilOrigin-Name: 0dc4cb935514131c99172175d57feec3a1743aa9
2012-03-09 22:02:08 +00:00
7f67d94cfe
Fix a bug [3557ad65a07] that causes incorrect DISTINCT processing on
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an indexed query involving the IN operator.
FossilOrigin-Name: dec9a995d7012a1f85be4edb71240b9d4f07c60e
2012-03-03 00:34:47 +00:00
1d8cb21fdb
Modify the OP_Once opcode so that it works correctly in trigger sub-programs. This is a candidate fix for [7bbfb7d442].
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FossilOrigin-Name: 557c69055a300b4082830b5f4803091dca1c3140
2011-12-09 13:24:16 +00:00
0c733f67d8
Where possible, take advantage of the rowid at the end of index records to optimize range constraints (<, >, <=, >=) on the rowid column.
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FossilOrigin-Name: 3b58f5f06648205a47e5cace0201269c406e476a
2011-11-16 15:27:09 +00:00
74e7c8f51f
Purge lingering references to SQLITE_STAT2 from the code and test scripts.
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FossilOrigin-Name: aed2bf7a3c828a7191389b3f8235a9387977b476
2011-10-21 19:06:32 +00:00
f9b22ca416
Remove stale requirements marks from the query planner.
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FossilOrigin-Name: 76de9914bed11abda3898928633ad09d5a284f84
2011-10-21 16:47:31 +00:00
a2153f75c3
Fix an uninitialized variable in OR-clause processing.
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FossilOrigin-Name: 54aecd929867606d14a062b501abbfb6f5f05e37
2011-10-18 19:14:33 +00:00
30ddce6ff4
Added the tool/warnings-clang.sh script. Changes so that there are no
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warnings with either gcc or clang even including FTS4 and RTREE and
both with and without SQLITE_THREADSAFE=0.
FossilOrigin-Name: 39408702a989f907261c298bf0947f3e68bd10fe
2011-10-15 00:16:30 +00:00
b07028f71c
Add assert() statements and eliminate needless variable assignments in order
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to get the clang scan-build utility to report zero problems against the
SQLite core. Clang's static analysis did find one real problem - but it was
in the command-line shell, not in the SQLite core.
FossilOrigin-Name: 60fee9574b0125705787e33c16f116cf188c8323
2011-10-14 21:49:18 +00:00
67855877ff
Fix requirements marks associate with STAT3.
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FossilOrigin-Name: 9325c1a8c413dfbf0381190d8347f0a446ae5f5b
2011-10-11 12:39:19 +00:00
0a61df670e
Add testcase() macros to ensure good test coverage.
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FossilOrigin-Name: 5c132592820e9dc2355e26ea14e155c797c335b3
2011-10-07 17:45:58 +00:00
9ef61f4f4e
Prevent infinite recursion of in the query planner for some pathological
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test cases by disabling OR-clause processing upon first recursion.
FossilOrigin-Name: 9fca05eac503d712886a05d03794f76c61fb39ed
2011-10-07 14:40:59 +00:00
8871ef5afd
Begin an effort to enhance the query planner to do a better job with OR terms
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in the WHERE clause. This change allows ANDs outside of the OR to be factored
into the OR terms if that is helpful in finding better indices.
FossilOrigin-Name: 876bd21aaac444c7e056730e35696a74e9a1af0a
2011-10-07 13:33:10 +00:00
567211ed0e
Testability enhancements.
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FossilOrigin-Name: be44928cf2a3c063c8228b769d90947acbfad1ef
2011-09-23 13:59:33 +00:00
5c62486cd8
Fix an issue in ANALYZE when STAT3 is disabled but both sqlite_stat2 and
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sqlite_stat3 tables exist. Also add testability tweaks to the STAT3 code.
FossilOrigin-Name: 3ca7e449e2e20d95e516cf7fe87bfa0b51c07086
2011-09-22 18:46:34 +00:00
93c6384ca6
Fix an uninitialized variable and a misuse of memcpy().
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FossilOrigin-Name: ee110d5a4a6f29400bb632a9a18c7dcd04638657
2011-09-22 00:28:55 +00:00
d3ed73406c
Pull in the latest changes from trunk. Update the STAT3 documentation.
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FossilOrigin-Name: 63fc3e4bea6a7f5dc34b2af83f30458eb10b8fe0
2011-09-21 00:09:41 +00:00
5c4e5e53fe
Merge all the latest trunk changes into the experimental STAT3 branch.
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FossilOrigin-Name: 51908c8f2bc6c086570f7493a29b096f0a40ce34
2011-09-16 19:29:58 +00:00
a464c23429
Remove unreachable branches from the previous change. Add additional
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test cases.
FossilOrigin-Name: cf51ef8ab8a610ddf64f66970dd689fe1df405b8
2011-09-16 19:04:03 +00:00
8850177924
When analyzing the right-hand side of IN operators to see if the IN operator
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can work with an index, be sure to decend into nested subqueries.
Fix for ticket [1a1308d2538d7]
FossilOrigin-Name: 0156f10e23daca0e2504cd293a67ed0233d254d0
2011-09-16 17:43:06 +00:00
48f2d3b10a
Add the new OP_Once opcode. Use it to clean up and simplify various
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one-time initialization sections in the code, including the fix for
ticket [002caede898ae].
FossilOrigin-Name: 7f00552b739fad79517b042a6ed61abe743a917b
2011-09-16 01:34:43 +00:00
6825719667
Fix a few harmless compiler warnings. Add SQLITE_ENABLE_STAT3 to the
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standard compiler warning script.
FossilOrigin-Name: 3d68f9afee02f95103eb1682b8f2362f8d249437
2011-08-16 17:06:21 +00:00
4e50c5ec48
Further testing and bug fixing for sqlite_stat3. Added the Index.avgEq
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field to index statistics. Fixed several problems in the query planner
associated with stat3.
FossilOrigin-Name: 89b2f70884cad0abdf4c66cb64ecddb2820ded74
2011-08-13 19:35:19 +00:00
faacf17cc1
Begin a branch that experimentally replaces sqlite_stat2 with a new table
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called sqlite_stat3 that will hopefully facilitate better query
planning decisions.
FossilOrigin-Name: 52e1d7e8ddd4bb5ef3a9d00fd2d719a8a784f807
2011-08-12 01:51:45 +00:00
b4256996c4
Make sure IS NOT NULL constraints work on virtual tables.
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Fix for ticket [6c14288a473ceff].
FossilOrigin-Name: a55f4ab99952a731e4cd8f6ef17389062e5ed4c5
2011-08-02 01:57:39 +00:00
bf4ec555fa
Do not try to use STAT2 to refine the row estimate of a query that
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uses a unique or nearly-unique index.
FossilOrigin-Name: efffc49baf38698ed3de05d16b4261bf405d42d7
2011-07-13 18:31:10 +00:00
f1d3e32909
In where.c::findIndexCol - make sure that the Expr.op is TK_COLUMN before
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accessing the Expr.iColumn and Expr.iTable fields. Also fix a couple of
unreachable branches.
FossilOrigin-Name: 418a4da2a96cf33055f18c9a667754fad2111cf3
2011-07-09 13:00:41 +00:00
da79cf0cc9
Fix for [54844eea3f]: Do not create automatic indexes on correlated sub-queries.
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FossilOrigin-Name: 9f14fa56ba31afe3de8b0cf26ed09573a2cc2283
2011-07-08 16:10:54 +00:00
a9b1b91436
Extend the SQLITE_TESTCTRL_OPTIMIZATIONS option to disable DISTINCT
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optimizations.
FossilOrigin-Name: 18501dd1a8aa8299c091c36e35b9a10a29d4467b
2011-07-08 13:07:02 +00:00
b24d83fb35
Add a testcase macro to ensure testing a boundary case in DISTINCT processing.
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FossilOrigin-Name: ff9fc722dc481df1ce6a9733db1f033b88141d5d
2011-07-02 19:12:05 +00:00
969e5595e8
Ensure that automatic indexes are only created in scenarios where they may be used more than once.
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FossilOrigin-Name: 27c65d4d9c58bfc4ea8f9337fa15090459fb26c5
2011-07-02 15:32:57 +00:00
94e08d92f9
Fix a broken assert() in where.c.
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FossilOrigin-Name: 090b29177fbc9faa83b560d92ddc3710d291776e
2011-07-02 06:44:05 +00:00
6f3439697e
Improve use of indexes to optimize DISTINCT queries.
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FossilOrigin-Name: 6c202ea0247ff509f696eee3839975a88ed26cf2
2011-07-01 18:26:40 +00:00
50118cdfdb
Improvements and tests for detection of redundant DISTINCT qualifiers.
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FossilOrigin-Name: 7337293c87fb563604dd6ad284f2d1e30c938b4c
2011-07-01 14:21:38 +00:00
38cc40c216
Experimental changes to improve optimization of DISTINCT queries.
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FossilOrigin-Name: f7ba0219ef2f235543c258be736955d91ca5ecce
2011-06-30 20:17:15 +00:00
c2822b76b4
If the keyword "unordered" appears at the end of the SQLITE_STAT1.STAT
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column for an index, then use that index for equality lookups only, never
for range queries or sorting. This feature is currently undocumented and
my change or be removed in a future release.
FossilOrigin-Name: 8a42e236701c8afd9ada7d4568712a21690ea087
2011-04-09 03:20:59 +00:00
ea6dc4458b
Always make sure the left-hand side of the IS NOT NULL operator is a
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smiple column, not a general expression, before applying the IS NOT NULL
query optimization.
FossilOrigin-Name: 543f75a6abe3aa4f49df43e71a462702d40b3251
2011-04-08 21:35:26 +00:00
041e09f189
Change two new internal functions in where.c from global to file scope.
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FossilOrigin-Name: 5bbfa17d4d6db18f8077f758d70c1bc253b58e2e
2011-04-07 19:56:21 +00:00
fcd71b6010
Suppress many harmless compiler warnings, mostly signed/unsigned comparisons
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within asserts or unused parameters in extensions.
FossilOrigin-Name: 3eeb0ff78d04891b5fd1a3d99a9fb8cfbed77a81
2011-04-05 22:08:24 +00:00
ce62d93837
Fix two compiler errors associated with non-standard compile-time options.
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FossilOrigin-Name: e3bf2d5ce4f87535e030a446e03d911f421805f7
2011-04-01 02:26:36 +00:00
d6ee353c84
If the keyword "unordered" appears at the end of the SQLITE_STAT1.STAT
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column for an index, then use that index for equality lookups only, never
for range queries or sorting.
FossilOrigin-Name: 3b964155f611c437d53d44feafa22f531942b1b4
2011-03-29 15:00:17 +00:00
ac8eb11375
Comment enhancement to better explain the logic in the "x IS NULL"
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optimization.
FossilOrigin-Name: 869f894798a65f8bc0e0b083866a784fa0189f68
2011-03-17 01:58:21 +00:00
1f9c7663ce
Enhances to the query planner such that "x IS NULL" constraints take the
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STAT2 statistics into account, just like "x=VALUE" constraints.
FossilOrigin-Name: 2353176811f752a16c1f2351a3d3431919b062a9
2011-03-17 01:34:26 +00:00
95e037ba39
Omit unnecessary OP_Next and OP_Prev operators when uniqueness constraints
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guarantee that the code will only make one pass through the loop.
FossilOrigin-Name: f000c9b2b7348238fe2085140d2dd05294a19709
2011-03-09 21:02:31 +00:00
c126e63e4f
Remove dead code identified by the clang static analyzer.
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FossilOrigin-Name: 01a79d5a7af48fb7e50291c0c7c6283d3fb359d0
2011-03-06 21:28:32 +00:00
92e4feb74c
Do a better job of choosing the join table order when the tables having
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very different numbers of rows.
FossilOrigin-Name: 952f5e8c69904c48f2decfabf8ea60a2e9f3e134
2011-03-04 00:56:58 +00:00
0cf0e6c912
Remove an assert() that was made redundant by the previous checkin.
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FossilOrigin-Name: 21db719156deef9fb26aff27a01e324da255c825
2011-02-17 13:52:02 +00:00
6f2e6c0026
Add an ALWAYS() around a always-true test in where.c.
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FossilOrigin-Name: 8123283ee1a360586a1721a56b4db15718c25ee0
2011-02-17 13:33:15 +00:00
650f432e33
Fix harmless compiler warnings in the query planner.
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FossilOrigin-Name: 31fc4ba66e76876b2e7b6b2b74c07f47571938ce
2011-02-16 23:32:24 +00:00
drh