4ea48144f9
Fix a failing assert() in the new code on this branch.
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FossilOrigin-Name: 74d857d178dfadea7e07ba47439fe11aa9d282b54caf78cd6961e593b37406d0
2018-01-31 14:07:01 +00:00
8433e7166b
Update the omit-left-join optimization so that it works in some cases when the
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RHS is subject to a UNIQUE but not NOT NULL constraint.
FossilOrigin-Name: 88411a402b29f19d69e0d06d9099eabb98c238ddb7c07ce110236316f008753e
2018-01-29 17:08:52 +00:00
33f10207aa
Proposed fix for the query planner problem of ticket
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[ec32177c99ccac2b1].
FossilOrigin-Name: eef8cbef3c49e6331301a8f3f8a5fd12090b1e99e68487c2d405e53ef771f688
2018-01-27 05:40:10 +00:00
0c2ba13e02
Fix a problem causing an infinite loop or other malfunction in some UPDATE
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statements with an OR term in the WHERE clause.
FossilOrigin-Name: feb2c2b6f66b0f45490beb1642d99cdb89fa220e299a8c118929df557c814189
2018-01-16 13:37:43 +00:00
092457b18c
Change the function name to sqlite_unsupported_offset(X). Only enable the
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function if compiled with -DSQLITE_ENABLE_OFFSET_SQL_FUNC. The makefiles add
that definition to shell builds.
FossilOrigin-Name: 7a7f826e324b1a2c332e2f1d0740fd0babffcaca6275a798572f02ad367b99ab
2017-12-29 15:04:49 +00:00
fe6d20e9f4
Enhance location(X) so that it works with indexes and WITHOUT ROWID tables.
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The function might return an offset to the main table or to an index,
depending on whether the column X would be loaded from the main table or
from the index.
FossilOrigin-Name: dd94d6a880dfec4bddd247239b815b84964f804d24841e25f33f1d46a4b5274d
2017-12-29 14:33:54 +00:00
efc88d020c
Modify the new sqlite3_vtab_collation() interface so that it takes a
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pointer to the sqlite3_index_info object passed into xBestIndex rather than
an sqlite3 connection pointer, which the xBestIndex method might not have
access to.
FossilOrigin-Name: 5c1fe6666019147a26480b5db1bf2f474a5d072c234c736f16ed5d2a9a040b3f
2017-12-22 00:52:50 +00:00
e42e1bc594
Fix crash in sqlite3_vtab_collation() when called for an IS NOT NULL
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constraint.
FossilOrigin-Name: ad38d2c4f073705c02c7b38675e8ae86fe4a794d54eb796e7ed51a905824d5f5
2017-12-19 18:56:28 +00:00
11546779b7
Merge latest trunk changes into this branch.
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FossilOrigin-Name: d5b597b52a1213cdf382d96f4df3535727be0852b25bafd12bbef54da946c5f2
2017-12-16 19:16:24 +00:00
7e8515d8be
The query planner tries to avoids using indexes that use unknown collating
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functions.
FossilOrigin-Name: 02013fc120bf71a8be3550c696a588af8c92f2209f8e5db530624878ddc8aa7e
2017-12-08 19:37:04 +00:00
b7571b4ecb
When doing a table scan using an index, do not error out if collating
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functions used by that index are unavailable, since they will not be used.
FossilOrigin-Name: bbd69fa6fa7f3c86fb5cd1b69e1abbe1bbad61aa281e6c073a402d1b202e42ec
2017-12-07 22:10:16 +00:00
3d9c7c3a4f
Merge latest trunk changes into this branch.
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FossilOrigin-Name: 373fa21bffd37053bb1a741d3ace2f003a5639bf373c20ea7bb24a31080888b3
2017-11-29 16:16:29 +00:00
53bf7175af
Fix a problem in the omit-table-from-left-join optimization
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from check-in [0cd82ee9a8413cf] that was discovered by OSSFuzz.
FossilOrigin-Name: b016c28fa5617a20ad34c005372e738d28f7fc4388d19ee0cb7add4ed19d74aa
2017-11-23 04:45:35 +00:00
fa337cc115
Completely disable the skip-ahead-distinct optimization for all but the
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inner-most loop of a DISTINCT join. Fix for ticket [ef9318757b152e3a26e9592]
FossilOrigin-Name: b7595cf2cadcba486e60b3c230ccc412a7cf449c1d56cbe65869e6d5d9f1374d
2017-11-23 00:45:21 +00:00
065b34f6e5
Fix the skip-ahead-distinct optimization on joins for cases there the table
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in the inner loop of the join does not contribute any columns to the
result set. Proposed fix for ticket [ef9318757b152e3a2]
FossilOrigin-Name: 2dcef5a9ae7f347da65207bf6bf612fb12e18e1a6704799322f0cf2a86154cfd
2017-11-21 23:38:48 +00:00
41203c6cf1
Update the omit-table-from-left-join optimization so that it can omit tables
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from the middle of the join as well as the end.
FossilOrigin-Name: 618ca9fe53d8d2d7b4f368e6ee404d5fceeecac0d689f32ab62af8a6cbb37401
2017-11-21 19:22:45 +00:00
75dbf68b5b
Fix a problem preventing the planner from identifying scans that visit at most
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one row in cases where that property is guaranteed by a unique, not-null,
non-IPK column that is the leftmost in its table.
FossilOrigin-Name: 299d7ca52fec32f04ffd2b8561dd4b839e891792162f8b00259368683436b02d
2017-11-20 14:40:03 +00:00
85e1f46eb9
Fix a problem causing an INDEXED BY specifying an unusable partial index to be
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mishandled.
FossilOrigin-Name: 292a04086a902634fc514b379a2b245eb2681c1b84d9bb950b6ecb9aab28b468
2017-11-07 18:20:15 +00:00
9d9c41e25e
Remove unnecessary NEVER() and ALWAYS() conditionals.
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FossilOrigin-Name: 1c80c75d4be2f3d44fb18bb4c07eccac2aba79b688215a741317dfc47dc7c2ce
2017-10-31 03:40:15 +00:00
989d7278b0
Improved comments, including a typo fix, on the whereLoopCheaperProperSubset()
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function.
FossilOrigin-Name: 700a3c694438ca6cca185d0097f24799e82717ef38cb47bd83666c80f0e3cb2f
2017-10-16 11:50:12 +00:00
47b1d68f25
In the query planner, do not consider index X to be a proper subset of
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index Y if X is a covering index but Y is not.
FossilOrigin-Name: ee31c04353cd75ea4bbadee2994c30d3808b696a4f680187502d104902988a5d
2017-10-15 22:16:25 +00:00
4fa5cb3598
Update this branch to match latest trunk.
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FossilOrigin-Name: d325da6c50f2f9c10f50b3839f87c155876c339879bb8bdb82567b5ff34ef7ba
2017-10-12 14:13:31 +00:00
518e3f0673
Merge latest trunk changes with this branch.
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FossilOrigin-Name: 2719cf5c5bbe8e31d18368d54d968af3878ad2e15f0666e18d7b567d7439c451
2017-10-11 20:26:07 +00:00
70efa84da7
Add new routines to simplify dealing with collating sequences in expressions:
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sqlite3ExprNNCollSeq() and sqlite3ExprCollSeqMatch().
FossilOrigin-Name: 490e488ea963fe725b16212822c8608f2b6abce688931b611446bc2cbfe6b87c
2017-09-28 01:58:23 +00:00
db8e68b4cd
Indexes on expressions with a COLLATE clause are able to satisfy an ORDER BY
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with the same COLLATE clause.
FossilOrigin-Name: 0413001843dce7c63659d39b329ca14cdcd54f4407922f51b2fb7659572a733e
2017-09-28 01:09:42 +00:00
488e619192
In two places, change the magic number -1 to its proper symbol XN_ROWID.
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FossilOrigin-Name: 80277d2fc9b76fe41e345d00952da1528e69884f25911cf6e4f78b09ff778421
2017-09-28 00:01:36 +00:00
154896e8d2
Fix a harmless comment typo. No changes to code.
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FossilOrigin-Name: f7f0bf1da03f7fc1647ef172d9cb71a2ac46f136d4dee8e3a24e39313a981eb5
2017-09-15 14:36:13 +00:00
303a69b5ad
Refactor names of constants and functions associated with the auxiliary
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operators for xBestIndex.
FossilOrigin-Name: 0fb992af669e765760a94d2b6e2330b21a98f39f18445a94b0a2290560368d58
2017-09-11 19:47:37 +00:00
33892c11a7
Minor adjustments to indentation and spacing for clarity. No changes to code.
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FossilOrigin-Name: d3153abda6fd48015b007081734738b9cc4622e3564dc78a7a470a72dc2ca236
2017-09-11 18:37:44 +00:00
d03024d814
Enhance the vtab interface to handle IS, !=, IS NOT, IS NULL and IS NOT NULL
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constraints.
FossilOrigin-Name: 34c8e952616013deb6fffec701ac5989afac9bef1bf92458a2e4ba92c7ee924f
2017-09-09 19:41:12 +00:00
7e6f980bd4
Proposed fix for ticket [b899b6042f97f5]
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FossilOrigin-Name: c7f9f47b239fdd99b555fb0a31eb82b22dbe6c821f1612d67a0d6a822288d9f7
2017-09-04 00:33:04 +00:00
83e8ca54d1
Small performance optimization in sqlite3WhereBegin().
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FossilOrigin-Name: 39f708d1e286931365a8992dbe7f900108ff1dad146032a284ad1dec09b11e06
2017-08-25 13:34:18 +00:00
62f6f51ae1
Only use indexes on expressions to optimize ORDER BY and GROUP BY if the
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collation sequence matches. Possible fix for [e20dd54a].
FossilOrigin-Name: 37e1900880b70be6802eaf43b0e568fda709a1dd6083d8be11e5a7a7d1fda41a
2017-08-18 08:29:37 +00:00
bbccd52143
Avoid creating an automatic index on the RHS of a LEFT JOIN to optimize an IS
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term. Fix for [ce68383b].
FossilOrigin-Name: d2f0b2e859a8a413ee4e4bd7040e450ccd604069e4ea8dbc9ff924718c2b14d7
2017-07-18 17:13:41 +00:00
269ba80469
Add the count-of-view optimization when compiled using
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SQLITE_COUNTOFVIEW_OPTIMIZATION.
FossilOrigin-Name: d1ba200234f40b84327c7fc28c2584ed069da80e97578df71114d1a9ba9c559c
2017-07-04 19:34:36 +00:00
3e380a4485
Make the query planners use of partial indexes based on bound variables
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responsive to the SQLITE_DBCONFIG_ENABLE_QPSG setting.
FossilOrigin-Name: a934dd14ac55177ac541423f4a077484bb3b461b60c9c2e88d067cca922fa2bc
2017-06-28 18:25:03 +00:00
5aa550cf3b
Consider the values bound to SQL variables when determining whether or not a
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partial index may be used.
FossilOrigin-Name: 7b59c353b805c64689b4ae9df347705acbb5f116346ad77af8ce087da7893747
2017-06-24 18:10:29 +00:00
54ac445d53
Query planner tuning: When deciding between two plans with the same cost,
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bias the selection toward the one that does not use the sorter.
FossilOrigin-Name: f0ec36d479ac4efaa0efd0594d032dd7b8ccdf84a4dc3644cd688762186fbcca
2017-06-24 16:03:18 +00:00
c456a76fb3
When generating individual loops for each ORed term of an OR scan, move any
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constant WHERE expressions outside of the loop, as is done for top-level
loops.
FossilOrigin-Name: e4a022be4b069b08cfdfda5295461676b99d28e17bbbedfbcb362dec69de59bd
2017-06-22 16:51:16 +00:00
56790ea567
Fix an off-by-one error that messes up the display of loop codes in the
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".wheretrace" debugging output for queries with more than 62 candidate
loops when SQLITE_ENABLE_WHERETRACE is on.
FossilOrigin-Name: 0bbdaf2801e4102d952db65e53962e534b67b8b72e76fadb4ce404a6249129d9
2017-06-11 20:17:02 +00:00
63ad86e70e
Fix a problem in STAT4 equality estimation for multi-column indexes
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introduced by check-in [3e0590dee0e68cc1599].
FossilOrigin-Name: cfb0d9e0207128b1c2b48689288a849b19dbc00a22cfaca26eec4bfc773629f8
2017-05-24 04:18:00 +00:00
78436d4c66
When planning a query using sorting, resolve ties in the solver by selecting
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loop plans with the smaller unsorted cost.
FossilOrigin-Name: f261678c90297f9767040c577796cc1d4db598aa44b0de6906cb73eaef377dee
2017-05-22 00:45:15 +00:00
bcbb066534
Improved comments on one routine in the query planner. Improved diagnostic
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output for ".wheretrace". No production code changes.
FossilOrigin-Name: 946b87a5282f00d8c532a51f4390e6de781b9a0d6626cb3c077c5622895dc540
2017-05-19 20:55:04 +00:00
c42a0056d7
Merge latest trunk changes into this branch.
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FossilOrigin-Name: b1533bc455f52f570c0f4b8aaa0da802757dc89b0e45b9a9b31aa591a44bf7bd
2017-04-20 17:35:46 +00:00
bff6fe1f40
Improved optimizations of views as the right operand of a LEFT JOIN.
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FossilOrigin-Name: 41c27bc0ff1d3135cdb6273ede4595f5bb0c0e1e1d470ea1633cb525674cf431
2017-04-18 11:20:19 +00:00
990b6ceccf
Merge latest trunk changes into this branch.
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FossilOrigin-Name: 2d0c458e013cb2d02fbeabed8dabd66f55141aac194611f0e599b3c95af1964f
2017-04-15 15:47:19 +00:00
e01b9281fc
Add header comment for sqlite3_vtab_collation().
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FossilOrigin-Name: d238694ca445ccb4eeb3e3269a5f872f998f795945d0f9dd95c11d0e42d4d538
2017-04-15 14:30:01 +00:00
79610f5d09
Fix memory leaks in the code on this branch. Make use of the
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sqlite3_index_constraint.usage field. Do not try to handle ORDER BY terms with
explicit COLLATE clauses - they don't get passed to the vtab layer anyway.
FossilOrigin-Name: 0cd75a872c89958a7f418720a0e8c6f638f8284c488f666015c19136feae6be8
2017-04-15 14:16:04 +00:00
a2e2d92b21
Fix to the decision logic for when to use the skip-ahead-distinct optimization.
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FossilOrigin-Name: e50fd48969f99bc988389c53ff46714603b1d11de12c71b55c00cbee037f073c
2017-04-14 22:41:27 +00:00
0824ccf29b
Modify the code in ext/expert/ to use the vtab interface instead of
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sqlite3_whereinfo_hook(). Remove sqlite3_whereinfo_hook().
FossilOrigin-Name: 3bb6585004090dbf92dd5e9abdf0fd2c921e64b5b3121c4fb7446db764ab59e5
2017-04-14 19:41:37 +00:00
dan