database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-12 13:01:09 +03:00
Code Activity
22,526 Commits 1,607 Branches 185 Tags
8ddf686267c58ee0e519cfd9024f177e606be0ab
Commit Graph

1264 Commits

Author SHA1 Message Date
dan
f02cdd379a Avoid redundant ORDER BY operations when rewriting SELECT statements that 
contain window functions.

FossilOrigin-Name: 336de43a47e206fe7629072e5b8c80d4ede17ead8ef4dcf5d8da6833ff22d2f9
 2018-06-27 19:48:50 +00:00
dan
efa3a3c9cc Fix a problem with using LIMIT in window-function queries. 
FossilOrigin-Name: c1abd2dda4154cb573bdf627cdef794d3697f874c3b70357aaf5e4ed95ad1d5c
 2018-06-23 16:26:20 +00:00
dan
ce1037352d Fix a problem with using a window-function SELECT as a FROM clause sub-query 
in some circumstances.

FossilOrigin-Name: 11d733396f75ef1f206cd6f35630ff176484279861772918b9ea69412c13c62d
 2018-06-23 07:59:39 +00:00
dan
67a9b8eded Omit all window-function related code when building with SQLITE_OMIT_WINDOWFUNC. 
FossilOrigin-Name: 5f04b016467342b5a796bf702ed25b621eb86f2961c1e703d276c93f2cb6aa89
 2018-06-22 20:51:35 +00:00
dan
cc4644183b Fix a problem caused by a sub-query containing a window function in the FROM 
clause of a query that itself uses a window function.

FossilOrigin-Name: f4b1b6f85b53d72e735a1382f7c3de75af405a7878dd8cdcb10394e859ea3d69
 2018-06-19 18:11:05 +00:00
dan
9a94722d48 Fix problem with window functions min() and max() when used with a PARTITION 
clause and a frame starting point other than "UNBOUNDED PRECEDING".

FossilOrigin-Name: 43eb1e75a4d7ac0973ed8589bbaf379c24cdc8eacc4e613610d2d4c24d385dc1
 2018-06-14 19:06:36 +00:00
dan
7392569f5e Fix some problems with using window-functions in aggregate queries. 
FossilOrigin-Name: fe7081e0952950f577234fcbb58f3c1efa4579267654fd2f713dc4804e470e7e
 2018-06-12 18:40:17 +00:00
dan
e3bf632cc2 Add support for the WINDOW clause. 
FossilOrigin-Name: 19c983b511f1c823fdfb051713681b4c779f02fa83b41189afca0a9b8b72048d
 2018-06-08 20:58:27 +00:00
dan
dacf1de95c Do not flatten sub-queries that contain window functions. 
FossilOrigin-Name: 236cb75bd1f0d5eb86aa5f52d8d548e7263c34633833dcea9dfc934f142113b8
 2018-06-08 16:11:55 +00:00
dan
07509f8c1e Merge latest trunk changes with this branch. 
FossilOrigin-Name: 251022034219819a1dc356542770ff46e3147a080f072eb20af6106771dadd92
 2018-06-07 20:35:28 +00:00
dan
280c894b74 Calculate non-aggregate expressions in the SELECT list of an aggregate query 
that does not use min() or max() once per group, instead of once per row
visited.

FossilOrigin-Name: dce2dfbe1590deb3ef5661230ae2d232bd492441195defbf698ac56f9629211c
 2018-06-05 20:04:28 +00:00
dan
2b1287cf44 Merge latest trunk changes into this branch. 
FossilOrigin-Name: 83d6416a868fac81a78c9507185a48d00920e4322276245e285946f760915f4a
 2018-06-04 08:28:18 +00:00
dan
dfa552f45b Add support for window functions row_number(), rank(), dense_rank() and 
percent_rank().

FossilOrigin-Name: 91c1cb7a217d0991a08256269f6c55ef185c25362d57b36bfbd2d85dab38e58f
 2018-06-02 21:04:28 +00:00
dan
0f86c9d8fa Fix a bug in the SQLITE_ENABLE_SORTER_REFERENCES code causing an out-of-bounds 
array reference.

FossilOrigin-Name: 8cadaf587dc96370f9c8a1dccc366b93021e8cfe4526da9368a088828fd14faf
 2018-06-01 13:30:45 +00:00
dan
c3a20c19a8 Add support for "ROWS BETWEEN <expr> PRECEDING AND <expr> FOLLOWING" window 
frames.

FossilOrigin-Name: 3a203660f1e4da3b8d2d605c494f4843f6e00752f28042b49e11d7d6550dd406
 2018-05-23 20:55:37 +00:00
dan
f9eae18b56 Begin adding support for more esoteric window frames. 
FossilOrigin-Name: bc4b81d60d40583de0f929730159011c1a7696802532ebd02220de3ace94a60d
 2018-05-21 19:45:11 +00:00
dan
b6e9f7a4d1 Fix minor problems on this branch. 
FossilOrigin-Name: 19c2e4b2f164521eab84cb0a0e12984be9431eaedd001dd3671e9ea1a6212353
 2018-05-19 14:15:29 +00:00
dan
e2f781b9d1 Evaluate multiple window functions in a single pass if they use the same 
window definition. Add xValue callbacks for other built-in aggregate
functions.

FossilOrigin-Name: c9f0f140941660ff368e5bb5752d54feb1964b7a9eac986d4bfb8f24a1c20d86
 2018-05-17 19:24:08 +00:00
dan
2e362f9775 Handle multiple window-functions in a single query. 
FossilOrigin-Name: 35af0b750e70dcf0f343b115f4bbd0860a7e8064be204d4dfba1a43c22ff07b1
 2018-05-17 14:26:27 +00:00
dan
86fb6e1738 Start of experimental implementation of SQL window functions. Does not yet 
work.

FossilOrigin-Name: 3781e520854808fe02ad3fe77dd11fc917448c58ff1fd79123289dd91937decd
 2018-05-16 20:58:07 +00:00
drh
c6f36fa33a In an ORDER BY LIMIT, make sure the ORDER BY expression evaluator does not 
try to reuse values from the result set if the result set has not yet
be computed.  This fixes a bug in the recent deferred-row loading 
optimization, check-in [c381f0ea57002a264fd958b28e].
OSSFuzz discovered the problem.

FossilOrigin-Name: 5d61e75f32de09c81dbe844443209f063cccb005d60b846900de5b023643fc3b
 2018-05-05 16:50:35 +00:00
drh
4388522561 In ORDER BY LIMIT queries, try to evaluate the ORDER BY terms first, and it 
it becomes clear that the row will not come in under the LIMIT, then skip
evaluation of the other columns.

FossilOrigin-Name: c381f0ea57002a264fd958b28e4921cb9c9e73a10fb592f6bb64e6bc9bd16d39
 2018-05-03 23:20:06 +00:00
drh
5e8b9853da Fix a branch that has become unreachable due to recent enhancements. 
FossilOrigin-Name: 81ab5e0d106fb9f2de80d17c8167d8542c6721b8d7ec69c43e1571c2dcadeddd
 2018-05-03 22:52:56 +00:00
drh
4d79983ca5 Optimizations to the new EQP framework. 
FossilOrigin-Name: 956fef361a795bd081d8e23ce4075dc8aafcee63ab7275d13b657b529d185b30
 2018-05-03 19:47:14 +00:00
drh
fa16f5d9d6 Enhance EXPLAIN QUERY PLAN to report the generation of constant rows using 
VALUES or just a SELECT without FROM.

FossilOrigin-Name: c75eee69fa8a9b56ee58a4cc539e80cc982f43390dc3a357344d58479dd89a41
 2018-05-03 01:37:13 +00:00
drh
84a01debf9 Improved EQP output for recursive CTEs and multi-value VALUES clauses. 
FossilOrigin-Name: f2f525548c65f89f55cbe91da8a21512dedc6f7b68b58b7906d653e800a2963a
 2018-05-02 16:13:48 +00:00
drh
03c3905f94 Fix a dangling-else problem that was causing recursive CTEs to malfunction. 
Begin fixing test cases to work with the new EQP output.

FossilOrigin-Name: 82ca44b82fed6814c84440ba8bfaa019488ab956e84ac165180e2fcece6facb2
 2018-05-02 14:24:34 +00:00
drh
c631ded5e8 Improvements to the EQP display for compound select statements. 
FossilOrigin-Name: 699a77e479010a331b0423f157a2fbfc373688e3d0d04ae5e64376c00cb3d488
 2018-05-02 02:22:22 +00:00
drh
e2ca99c907 Begin reengineering the EXPLAIN QUERY PLAN function to provide more 
intuitive output.

FossilOrigin-Name: 70b48a7972dfbb44af3ccd8ccd830e984bec88d80a78b3566a5de86a16e7fc14
 2018-05-02 00:33:43 +00:00
drh
bbd4ae5a2f Defer loading result column values into registers on an ORDER BY LIMIT until 
we know that the LIMIT does not exclude the current row.

FossilOrigin-Name: ce4ef46058f4aaea6623a41255a2e4b69bb24f16a287391df48f6bacdb4c4989
 2018-04-30 19:32:49 +00:00
dan
f226f03d4f When processing an "ORDER BY ... LIMIT" that does not use an index, check 
whether or not a record may appear in the final result set before adding it to
the sorter.

FossilOrigin-Name: 71bf91c218334381b1b4bdba6a093e623b62e17f3e8550e154a11f0cb0b404f3
 2018-04-26 16:13:47 +00:00
dan
ccb9eb782c Remove a recently added NEVER() macro from a branch that can be taken in 
obscure circumstances.

FossilOrigin-Name: 2aa210030ae414782adab9291cc43a149a780f39bd3d306dc2892a8c20422a51
 2018-04-24 18:59:18 +00:00
drh
c447595df5 Do not attempt to use terms from the WHERE clause to drive indexes on the 
right table of a LEFT JOIN.  Fix for ticket [4ba5abf65c5b0f9a96a7a40cd18b]

FossilOrigin-Name: aeb694e3f787f1f8b55650c17f90c197eee3f7f9b890a88f458c33e43009a082
 2018-04-24 17:34:03 +00:00
drh
5279af8061 Fix to check-in [ca34c2dd20ee071e] - avoid a NULL pointer dereference 
following an OOM.

FossilOrigin-Name: c7e6e848fa91f61bc980a031a17d4cd4784f93a1c9ffee35665efa1a59f2982a
 2018-04-24 00:08:09 +00:00
drh
f20609d107 The ".selecttrace 0x2000" command causes just the top-level parse tree to 
be displayed, after all transformations, and showing the EQP iSelectId at
each level.

FossilOrigin-Name: ca34c2dd20ee071e6f8d60f91dbf474515a688ba57949143483da1641246cb25
 2018-04-23 17:43:35 +00:00
drh
e2243d26f3 The ".selecttrace 4" command now shows only a single parse tree after 
name resolution.

FossilOrigin-Name: 5682146e8a4ebb4edc1e1b53fbf3daf77f8cb9cd9bc2aa32acb34fa5824bd518
 2018-04-23 17:18:03 +00:00
drh
1bddf23b89 Do not restore the iSelectId value until after the last SELECTTRACE when 
debugging Select processing.

FossilOrigin-Name: 8088d8cac317adb96e357a8f4a196d7c1e0115af9c2335f167b4d7e7154299b0
 2018-04-23 17:09:58 +00:00
drh
b3b0d317e0 In the ".selecttrace" output, include the EXPLAIN QUERY PLAN iSelectId as 
part of each Select identifier.

FossilOrigin-Name: 5c6339f955eaa550c7d112488d7830e67ceacba4fbba12e1c5ce2970980159e0
 2018-04-23 17:02:14 +00:00
dan
dedff6be8a Add the "sorter-reference" optimization, allowing SQLite to be configured so 
that some required values may be loaded from the database after external
sorting occurs for SELECT statements with ORDER BY clauses that are not
satisfied by database indexes.

FossilOrigin-Name: ef74090a40ceaef2fd93a7613ec99a191ce986811c852e96f4a19719f18af4f0
 2018-04-18 19:56:14 +00:00
drh
5a2e65ed63 Avoid a NULL-pointer deref following OOM. 
FossilOrigin-Name: 413015c029d850d4ce7e66be1f59b57f291254240a958856378a62f5ac4a5092
 2018-04-18 19:08:44 +00:00
drh
7590d09324 Remove an unused local variable. 
FossilOrigin-Name: 9afeb0c88b211e3ad90697778ec8ebb80f216fe7078c3a2f51651c35d3828746
 2018-04-18 14:04:19 +00:00
dan
2e3a5a810a Add SQLITE_CONFIG_SORTERREF_SIZE configuration option. 
FossilOrigin-Name: b25a7bb769b8397a00736bd922bd24b1200b2f82d36d42ecb4c3eb17efb4b84d
 2018-04-16 21:12:42 +00:00
drh
25c3b8caf4 Reduce the size of the NameContext object by grouping seldom-used fields 
into a union.

FossilOrigin-Name: dba3095feeeb55b5c0ebe33bdd4be8ba1f24478406685d3a042a69d9c380e742
 2018-04-16 10:34:13 +00:00
dan
24e25d32ce Experimental change to "SELECT * FROM ... ORDER BY" processing to load some 
column values from the db after sorting.

FossilOrigin-Name: 9719cb46bbf501ce80f185159d594f593dd0b2639b9ef5a71a6c7b70046cb08d
 2018-04-14 18:46:20 +00:00
dan
d6189eafa4 Minor simplification to internal function generateSortTail(). 
FossilOrigin-Name: f32cdb41ca213cfcfe0bb5bfe56930d43e55525fa5640274b00f1ccce7f69634
 2018-04-11 14:11:53 +00:00
drh
a5746e0317 Minor changes to the input grammar resulting in a faster and slightly smaller 
parser.

FossilOrigin-Name: a2c443c0ee9a0e0b2d10298b8a74ff00a1a66e3f96f4093348f0fef977587204
 2018-04-09 20:36:09 +00:00
dan
4f9a7e5cb7 Fix an assertion failure triggered by a SELECT with a compound sub-query that 
contains an incorrectly placed ORDER BY clause. This problem is just an
assert() failure - non-DEBUG builds are not affected. Problem found by
OSSFuzz.

FossilOrigin-Name: 823779d31eb09cda5effe747d9adb35e600a52d4274226586437f674e7824d91
 2018-03-31 16:31:51 +00:00
drh
6a9b9527fa The push-down optimization was being too aggressive such that it sometimes 
generated incorrect results.  Reinstate the restriction (4) (with
qualifications) that was removed by check-ins
[b5d3dd8cb0b1e4] and [dd568c27b1d765].

FossilOrigin-Name: f08c1731b0b1dddcba190b094a35306a159713d3db939330f73075ff1d72c81e
 2018-03-27 15:13:43 +00:00
drh
7fbb101c54 Relax LEFT-JOIN restrictions on the push-down optimization. 
FossilOrigin-Name: b5d3dd8cb0b1e42ed0671a12d22af05194ea9522e4f41fd4bb0deff70b8b0757
 2018-03-21 01:59:46 +00:00
drh
efce69de37 Do a more thorough job of cleaning erasing traces of the strength-reduced 
LEFT JOIN.

FossilOrigin-Name: 08833dda3a25965cc509d0244d7cd68bdb2306351ca52862f347e1efe5db4508
 2018-03-20 22:52:27 +00:00