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23,964 Commits 1,625 Branches 186 Tags
94e615a6acf3a1519d98e85a6665c712edb5ea8a
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1577 Commits

Author SHA1 Message Date
drh
58eb1c0af1 Improved comments explaining the operation of the findTerm() utility routine 
in where.c.  Increase the maximum number of levels of transitivity from 4
to 11.

FossilOrigin-Name: fe152f8b048c9a18f99fa6096ff0e68dd630c318
 2013-01-17 00:08:42 +00:00
drh
7a5bcc0f08 Enhance the query planner to exploit transitivity of join constraints in 
a multi-way join.

FossilOrigin-Name: 13171eb5dc19733276fbfd5515d75b70a9f5f5d7
 2013-01-16 17:08:58 +00:00
drh
3bd5ab8638 Improvements to query planning for joins: Avoid unnecessary calls to 
"optimal scan" checks in cases where table reordering is not possible.
Make sure optimal scan checks are carried out for CROSS JOINs and LEFT
JOINs.

FossilOrigin-Name: d5ebb7877885839e93eee3b322624d4c4215c1c4
 2013-01-16 00:46:09 +00:00
drh
ea84a65e4e Fix a missing word in a comment. Enhance the "wheretrace" debugging output 
to show the estimated cost of each table option while planning the join order.

FossilOrigin-Name: ac4e119a87497f2e422ff1cb711112ed8594bfa9
 2013-01-15 18:49:07 +00:00
drh
5d5cf01ee0 Clarification to a comment in where.c. No code changes. 
FossilOrigin-Name: 04507c176330a06b09dcafa35ec0ca7498f5ace7
 2013-01-15 16:15:28 +00:00
drh
29a8bf8e94 Fix an over-aggressive optimization of ORDER BY on a three-way join where the 
second table is UNIQUE and the ORDER BY occurs on the third table.
Ticket [598f5f7596b0557].

FossilOrigin-Name: 5774f2175ce621dfc4b6b93f7ee13fd66f3ec2b9
 2013-01-09 11:31:17 +00:00
drh
7ee751d241 Proposed fix for ticket [a7b7803e8d1e8699cd8a]. 
FossilOrigin-Name: 3d0e00c731c39af91bad74c6d74853375bac356e
 2012-12-19 15:53:51 +00:00
drh
d03025327e Remove an unreachable branch. Improvements to comments. 
FossilOrigin-Name: d2fb7619b063b329b6d7ba9a16a7290e5d868f23
 2012-12-14 17:48:08 +00:00
drh
03597ef6e2 Merge in all the trunk changes that have occurred since this branch was 
opened.

FossilOrigin-Name: 6d507e4de924e2f4556ea4a03ee0fa7d647bf8bb
 2012-12-14 15:54:05 +00:00
drh
e40ed78c1c Fix the virtual table IN optimizer so that it work even if the virtual table 
implementation leaves the sqlite3_index_info.aConstraintUsage[].omit flag
clear for an equality constraint that it intends to use.

FossilOrigin-Name: d6e045f89c5a4b500b1da7ea1224b132909bafc6
 2012-12-14 15:36:17 +00:00
drh
04229acebc Factor some work out of the index loop of the bestBtreeIndex() routine for 
a small performance increase.

FossilOrigin-Name: 92c9ab56b1c67b9468bec57ab1d2c483a69a2810
 2012-12-08 22:14:29 +00:00
drh
261d8a51e2 Adjustments to the collating-sequence refactoring to facilitate full-coverage 
testing and to fix some minor issues found by TH3.

FossilOrigin-Name: cdbfa664839a409589ec7cebfc9111235d2f3b38
 2012-12-08 21:36:26 +00:00
drh
fb76f5a00c Make sure WHERE clause constraints A=B and B=A work the same even with 
COLLATE clauses.

FossilOrigin-Name: b3f53668115f0a12a01167c2a75eecc735416024
 2012-12-08 14:16:47 +00:00
drh
580c8c1816 Veryquick passes all tests now. 
FossilOrigin-Name: 7b96115e81deab0aa0472839cf787ba3f2fc64a7
 2012-12-08 03:34:04 +00:00
drh
7a66da1395 Many more tests are passing. Only about 100 failures remain in veryquick. 
FossilOrigin-Name: f9fa7581c0371fe0feb4e97487741ade18595810
 2012-12-07 20:31:11 +00:00
drh
0a8a406e9b Some errors in veryquick resolved. Many more to go. 
FossilOrigin-Name: 972443b4eb282d45507da06c75e2cd46dd72326b
 2012-12-07 18:38:16 +00:00
drh
4b17cf5855 Veryquick now row to completion without segfaulting or asserting. But there 
are still lots of errors.

FossilOrigin-Name: 7fafab12e4c0c832c421975f8329c3214403d281
 2012-12-07 14:02:14 +00:00
drh
ae80ddea9f Remove the Expr.pColl field and compute the collating sequence as it is needed. 
This fixes the test script "shared9.test", though there is still a memory leak.
And there are other problems.  Consider this a work-in-progress.

FossilOrigin-Name: fd011cb22f2d899d94ec7ce22641d7a8f5e19972
 2012-12-06 21:16:43 +00:00
drh
fc5e546641 Make sure that the optimization that set the maximum column that will be used 
on a particular query does not mistakenly change an opcode other than
OP_OpenRead or OP_OpenWrite.  In particular, make sure it does not overwrite
the P4 field of an OP_SorterOpen.

FossilOrigin-Name: b0c1ba655d69c0c46c16ea2aef4e6c9a3e6ce3fb
 2012-12-03 17:04:40 +00:00
drh
ada796bbaa Disable the table selection rule that tried to prevent full table scans from 
migrating to the outer loop unless they were optimal.  The new scaling of 
outer-loop costs by cost of inner loops obviates the need for that step.  And,
in fact, that step causes problems with the new inner-loop cost accounting.

FossilOrigin-Name: 51bfd63b7f9fe53831570ad124c932cb3582b104
 2012-11-09 18:22:26 +00:00
drh
782d68a4cd Try to take into account the cost of inner loops when selecting which table 
of a join to use for the outer loop.

FossilOrigin-Name: 942556342a332b04a11169bb04f387d741ef9488
 2012-11-09 17:59:26 +00:00
drh
da998c8ec0 Make sure that the optimizer never tries to create an automatic 
index on a coroutine subquery.

FossilOrigin-Name: f83aa0de8470748b3cd0bff232aeea3baf8dae53
 2012-10-30 15:31:31 +00:00
drh
21172c4cc0 Add an optimization that attempts to run a subquery as a coroutine rather 
than manifesting it into a temporary table.

FossilOrigin-Name: 7af3acbbd49a2114fcdada9ec907c68ba9b053bd
 2012-10-30 00:29:07 +00:00
drh
447b289ec8 Make sure the automatic index optimization is checked even if the 
covering index scan optimization was previously selected.

FossilOrigin-Name: ac1d5d8a553d8ba76a332eed9d563ce7f04a7a37
 2012-10-26 18:40:01 +00:00
drh
281bbe2a95 Enable optimization of IN operators on constraints to virtual tables. 
FossilOrigin-Name: aa650746b19e4a6a373f7e47effff3ab2f48e78c
 2012-10-16 23:17:14 +00:00
drh
90abfd086f Merge the fix for ticket [d02e1406a58ea02] into trunk. 
FossilOrigin-Name: dd34bec389359845b86f4cc4906ab440f92dcab9
 2012-10-09 21:07:23 +00:00
drh
2f546ee914 Bring some comments up to date in the query planner, and especially the 
ORDER BY optimizer.  Also add testcase() macros.

FossilOrigin-Name: bb5c0f1c92b48631d4a12cd4f321b53cd07885c8
 2012-10-09 09:26:28 +00:00
drh
86257fff87 Remove an unused variable. Fix code that occurs before a variable 
declaration.

FossilOrigin-Name: 01dc032b5bbd9c9ebb1965f176ca5d732cda85ea
 2012-10-09 01:39:25 +00:00
drh
69a76bad73 Replace an always-false conditional with an assert(). 
FossilOrigin-Name: 981b9943e4b2b660690ec1ac145abdd3c74f8dd2
 2012-10-09 01:23:25 +00:00
drh
3a17ea7ab6 Merge ORDER BY optimization refactoring and repair into trunk. 
FossilOrigin-Name: c027a9af9137f3346dbb5c5e100a087c2e89797b
 2012-10-08 21:51:58 +00:00
drh
2fad815c52 All test cases (veryquick.tcl and min.rc) pass. A few branch operations in 
ORDER BY optimization logic are untested by min.rc.

FossilOrigin-Name: 8314fd6078a3a71aea9d6386ff277cfeb592b4ba
 2012-10-08 21:01:15 +00:00
drh
6b9e565e54 Further tweaks to the ORDER BY optimizer, to fix a bug and to get the 
optimizer to recognize some additional cases.

FossilOrigin-Name: bcb4f262476193cfb17818d8c62bab528dddeef9
 2012-10-08 20:27:35 +00:00
drh
0a4c741cab Bug fixes in the ORDER BY optimizer. 
FossilOrigin-Name: 301bbee4045aa169e29fb4fb75743b71eb4760a1
 2012-10-08 19:41:38 +00:00
drh
8e4af1b997 Continued refactoring of the ORDER BY optimization logic. This check-in 
is close to working, but it still has issues.  A few test cases fail.

FossilOrigin-Name: adbdc663f3d22ff03f21040a811d585cf2218626
 2012-10-08 18:23:51 +00:00
drh
79e72a50aa Consolidate all occurrences of the "no such collation sequence" error message 
into a single spot.

FossilOrigin-Name: 8ea67522fb03134f355ecb776b70c6917241cab2
 2012-10-05 14:43:40 +00:00
drh
4f68d6c8c0 Yet another refactoring of ORDER BY logic in the query planner. This 
particular check-in works mostly, but still has a few minor issues.

FossilOrigin-Name: 8f4487450be1a2b0371f8251a967cbe341b2dea1
 2012-10-04 12:10:25 +00:00
drh
613a53a029 Fix an out-of-order memset() that occurs before all variable declarations 
are finished.  Also fix a line that exceeds the 80-character line length
limit.

FossilOrigin-Name: ba2f492f957ab5556cd540e21a76ebb75efea725
 2012-10-03 18:09:32 +00:00
drh
6f0e400cba Fix a query planner problem that only occurs when covering-index-scan is 
disabled.  Fix to tests whose output changed due to the new and more
aggressive ORDER BY optimization.

FossilOrigin-Name: 0f9bb90100aa304a7f28023ca4173e68b445e8bd
 2012-10-03 12:38:19 +00:00
drh
d663b5bdef Further attempts to optimize out unnecessary ORDER BY clauses. 
FossilOrigin-Name: 6744d9a37faffed59b4d5cb96c8671ec46a87ea7
 2012-10-03 00:25:54 +00:00
drh
afcd522af8 More lenient handling of ORDER BY optimization in joins with mixed ASC/DESC. 
This is a better and less restrictive fix for the problem addressed by
the previous check-in.

FossilOrigin-Name: abcf6a5d054559ee5a093ba39180c47b4958d9cd
 2012-10-02 15:19:19 +00:00
drh
178eb61c6b Only continue an ORDER BY optimization into inner loops if the equality 
constraints on the inner loop match terms of an outer ordered index that
are actually used by the ORDER BY clause.

FossilOrigin-Name: b0e7b4df6c2a8c479f8d210bde50c737eaa248f0
 2012-10-02 14:11:29 +00:00
drh
3be57d2aba Factor an invariant out the loop termination condition for the ORDER BY 
satisfied-by-index analyzer routine.

FossilOrigin-Name: 545bb33688663066cf3f09e4cdc4d5cfe59fb8db
 2012-10-02 01:46:48 +00:00
drh
a578d048c6 Make sure the outer loop cursor numbers are recorded in time for them to be 
used by the ORDER BY optimizer.

FossilOrigin-Name: 351dc8d9cab8a222f28fb865d3a7d1c622d60d6f
 2012-10-02 01:25:16 +00:00
drh
1afcaaea7a Improvements to the wheretrace output. 
FossilOrigin-Name: 76b277655646a9fe0f336ff106157f1efcd32019
 2012-10-02 01:10:00 +00:00
drh
04b85bc609 Minor changes to the query planner for improved test coverage. 
FossilOrigin-Name: c12044df322283c9deb0d7dacd8a699ac53f27b6
 2012-10-01 17:44:05 +00:00
drh
60441af4f2 Improved ORDER BY optimization when outer loops of a join return a single row. 
FossilOrigin-Name: 62225b4a4c4bfe1820ef54cb202edf2cd866429f
 2012-09-29 19:10:29 +00:00
drh
a9e3fc05f5 Fix some corner case behavior in the new ORDER BY optimization logic. 
Remove the SQLITE_OrderByIdx bit from the 
SQLITE_TESTCTRL_OPTIMIZATIONS mask, since enabling it caused many
TH3 tests to fail when the NO_OPT configuration parameter was engaged,
and since there really isn't any need to turn that optimization off.
The SQLITE_OrderByIdxJoin bit remains.

FossilOrigin-Name: 98b633717a1c9a08f6a1d00bc6bc891564ae7e9b
 2012-09-27 23:27:23 +00:00
drh
5343b2d4a8 More test cases an bug fixes for the ORDER BY optimization of joins. All 
veryquick tests now pass.

FossilOrigin-Name: 0d573320057b0903a5589cabfb1b1ece1c57958e
 2012-09-27 19:53:38 +00:00
drh
6b10a6a7ed Test cases and bug fixes applied to the ORDER BY optimization for joins. 
Some test cases fail, but except for the new orderby1.test failures, all
failures appear to be issues with the tests, not with the core code.

FossilOrigin-Name: 75cda864ededb6dc0f84bd52ed3311753a58e351
 2012-09-27 17:31:32 +00:00
drh
7e5418e4a4 Add more bits to the bit vector that is used to disable optimizations for 
built-in test.  Add specific bit patterns to disable ORDER BY using an
index in general and for joins.  Use macros to test for bits in the 
disabled-optimization bit vector, in order to make the code clearer.

FossilOrigin-Name: d2fcba1e143beca8c45724d2108870657c269e17
 2012-09-27 15:05:54 +00:00