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570 Commits

Author SHA1 Message Date
drh
1ccce44937 Fix the ORDER BY optimization with IN constraints when the RHS of the 
IN constraint is a descending index.

FossilOrigin-Name: 62316ebaca933f7e5df2018e8360a2b74234f30a
 2013-03-12 20:38:51 +00:00
drh
503a686e09 Always use strncmp() rather than memcmp() when comparing strings where one 
or other string might be less than the length parameter, since optimized
versions of memcmp() might read past the first difference and in so doing
generate an access violation.

FossilOrigin-Name: d73435587ba7459e2e2c32980d0e17abdeceb4bc
 2013-03-01 01:07:17 +00:00
drh
433dccfb52 Rename SQLITE_CONSTRAINT_RAISE to SQLITE_CONSTRAINT_TRIGGER. Put the 
extended constraint error codes in alphabetical order.  Add many test cases
for the extended constraint error codes.

FossilOrigin-Name: 3f67437536591a1b0742a25b983707933aaa16d5
 2013-02-09 15:37:11 +00:00
drh
d91c1a1768 Add extended error codes for constraint errors. 
FossilOrigin-Name: 5461104668a49529577f21df97f6a0e7d8f0c679
 2013-02-09 13:58:25 +00:00
drh
3e3f1a5b49 Now supports result sets of the form "TABLE.*" with nested FROM clauses. 
FossilOrigin-Name: 4cf5ed7ea198abc32f8118e79490e77f847f08c1
 2013-01-03 00:45:56 +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
580c8c1816 Veryquick passes all tests now. 
FossilOrigin-Name: 7b96115e81deab0aa0472839cf787ba3f2fc64a7
 2012-12-08 03:34:04 +00:00
drh
d91eba9673 Recognize TK_COLLATE operators that have been transformed into TK_REGISTER. 
Skip both TK_COLLATE and TK_AS operators when looking for the top of an
expression.

FossilOrigin-Name: f66c1db2965054f38125218202b6a6ec62d57666
 2012-12-08 00:52:14 +00:00
drh
62a66e7034 Do not report missing collating functions while parsing the schema. 
Also remove a stray comment.

FossilOrigin-Name: e313edca0472f07e9b872b92120d80b4bc177328
 2012-12-07 22:54:41 +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
6e83a57f43 Proposed fix for ticket [bfbf38e5e9]. 
FossilOrigin-Name: 18ae030dad30303129186738c27cdc4ba06362b9
 2012-11-02 18:48:49 +00:00
drh
e8abb4cad3 Fix an out-of-date comment. No changes to code. 
FossilOrigin-Name: 10cc12b16b2f1ae4e6b3a84cef5a44564d282e9c
 2012-11-02 18:24:57 +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
dan
41fb5cd103 Shared-cache mode fixes for views and virtual tables. 
FossilOrigin-Name: 2b370dea704b59262c604af0efcef5660b194454
 2012-10-04 19:33:00 +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
drh
e8e4af7697 Consolidate more of the DISTINCT processing logic into a single spot in the 
code.  Reduce the number of OP_Column operations needed to perform a
WHERE_DISTINCT_ORDERED.

FossilOrigin-Name: 79e922f7ae29bbe06d639d648fbd72523cf9a28e
 2012-09-21 00:04:28 +00:00
drh
dbaee5e342 Enhance IN processing to allow efficient use of indices with numeric affinities. 
Add test cases for IN processing that would have spotted the error in the
[2be661a48023f4] check-in.

FossilOrigin-Name: 5ded9b68388f4024425c11f09b03529ac89454ce
 2012-09-18 19:29:06 +00:00
drh
d4305ca61c Enhancements to the comments on sqlite3FindInIndex(). No code changes. 
FossilOrigin-Name: b1a4c394995eb90b3fb43ab204704bda03799303
 2012-09-18 17:08:33 +00:00
drh
e1a022e48b Make sure the KeyInfo.aSortOrder array is always allocated so that we never 
have to test for KeyInfo.aSortOrder==0 in performance-critical loops.

FossilOrigin-Name: 45793f0b844fee7445bc9269b403f89a58f77150
 2012-09-17 17:16:53 +00:00
drh
fb0a60819b Merge the nested aggregate query enhancements into trunk. 
FossilOrigin-Name: d4cd6017c9875947a05b1dc36538d4272fb18739
 2012-08-24 01:07:52 +00:00
drh
ed551b95a4 Add test cases and fix bugs associated with the previous check-in 
enhancements to nested aggregate subquery processing.

FossilOrigin-Name: 00b1dc71be4c3420730b5f7840af824ea86165e7
 2012-08-23 19:46:11 +00:00
drh
030796df8d Further improvements to the processing of nested aggregate queries. 
FossilOrigin-Name: 3c3ffa901f5ce8a523028ff15563ce3e0f55a641
 2012-08-23 16:18:10 +00:00
drh
2b596da8b7 Refactor field names in the SelectDest object to make them distinct and easier 
to grep for.

FossilOrigin-Name: b589f1efb3907a68058bf2ee981dca126d083e83
 2012-07-23 21:43:19 +00:00
drh
bbabe19767 Mark and always-true conditional as such. Add the fuzz-oss1.test test module. 
FossilOrigin-Name: bdc01fd0fa0c15efbb32bf18527c71e3e4dc48ed
 2012-05-21 21:20:57 +00:00
drh
3a8c4be7d4 Candidate fix for the nested aggregate query problem of ticket 
[c2ad16f997ee9c8e].

FossilOrigin-Name: f3dd1fafd4718558de1f06139419a8c560d727f5
 2012-05-21 20:13:39 +00:00
drh
d5a336ef58 Fix harmless compiler warnings (unused parameter warnings) in the aggregate 
query analyzer.

FossilOrigin-Name: 2d43562084316ec180a4c2cfc3fee08d58432204
 2012-04-19 15:49:19 +00:00
drh
374fdce485 Improved handling of aggregate subqueries within an aggregate query. 
FossilOrigin-Name: 430bb59d798286a86c351de92c429345f016b3f0
 2012-04-17 16:38:53 +00:00
drh
5fb52caadf Do more aggressive optimization of the AND operator where one side or the 
other is always false.

FossilOrigin-Name: f9a7e179cbbeeab5e57bbf392bef89750215546b
 2012-03-31 02:34:35 +00:00
drh
4e245a4c35 Fix compiler warnings on GCC and MSVC and fix a C89-ism that 
broke the build for MSVC.

FossilOrigin-Name: b451c0f97f0abe78ebe6c62ff489ec1ad8a1f767
 2012-03-30 00:00:36 +00:00
drh
31ec740a3d Fix the typeof() and length() optimization so that it works for aggregates 
as well as scalar queries.

FossilOrigin-Name: bc18215a8a660442db6ddeeda4a88df0acffe0f7
 2012-03-28 02:43:20 +00:00
drh
a748fdcc43 Evaluate typeof(X) and length(Y) where X is any column and Y is a blob column 
without actually loading X and Y from disk.

FossilOrigin-Name: b899dbeb60752843287e2c6ad3577e1d00f0d587
 2012-03-28 01:34:47 +00:00
drh
6c5351589c Simplified array allocation in the IdList and AggInfo objects. 
FossilOrigin-Name: 25df2a7458d025bc00380b4a0893637639f9f0d4
 2012-02-02 03:38:30 +00:00
drh
d872bb180c Remove the nAlloc field from the ExprList object. 
FossilOrigin-Name: 5963de303a9106b446a9423aa838bfdf6bc1e7f3
 2012-02-02 01:58:08 +00:00
drh
4b3ac73c2f Minor cleanups of the compound-subquery flattening logic. New test cases 
added for joins the compound subquery.

FossilOrigin-Name: 5061d85ff934db3c217c97acbbbed3286d9e02aa
 2011-12-10 23:18:32 +00:00
drh
678a9aa7bd Import the experimental parse-tree explainer, with fixes, from the 
tree-explain branch.

FossilOrigin-Name: bcbc7152d49107afa926c8950360c61a6cf3d244
 2011-12-10 15:55:01 +00:00
drh
a5eec8c8c3 Merge the latest trunk changes into tree-explain branch. 
FossilOrigin-Name: 1a360da0f8314f232c224c71829646bc7558892b
 2011-12-10 14:44:31 +00:00
drh
b8475df809 Make no assumptions about the initial state of VDBE registers. 
FossilOrigin-Name: 521d72bdf67b4b1972331307345a18c231a6e1d6
 2011-12-09 16:21:19 +00:00
dan
1d8cb21fdb Modify the OP_Once opcode so that it works correctly in trigger sub-programs. This is a candidate fix for [7bbfb7d442]. 
FossilOrigin-Name: 557c69055a300b4082830b5f4803091dca1c3140
 2011-12-09 13:24:16 +00:00
drh
04b8342b83 More compact notation for the parse-tree view. 
FossilOrigin-Name: 0eb3f8b1e3a196811fb54a5e2645debe6119610a
 2011-12-07 15:33:14 +00:00
drh
23b1b37229 Cherrypick the [7e5b56b1c6] fix for the sqlite3SelectDup() routine 
into trunk.

FossilOrigin-Name: 7fc535090ca3416706dff4abce10ac2d7f775e02
 2011-12-07 01:55:51 +00:00
drh
e7e6a54504 Bug fix in sqlite3SelectDup(). Make sure the pNext pointer is valid. 
FossilOrigin-Name: 7e5b56b1c602d4adfd4496a9c877f3b685b2d360
 2011-12-07 01:47:27 +00:00
drh
a84203a074 Improvements to the data-structure explain subsystem. Most queries now 
give a reasonably detailed graph of their parse tree.

FossilOrigin-Name: 0aa7d3d2346bdddcc4e1e25ee26d13c8594885e5
 2011-12-07 01:23:51 +00:00
drh
7e02e5e6b5 Begin adding the data-structure explaining subsystem. All is contained within 
FossilOrigin-Name: 79ae51c5b1b20ed0a425a87e65a32a096a80b7e1
 2011-12-06 19:44:51 +00:00
drh
cdc6955716 Do not reuse temp registers originally allocated to a subroutine within 
the main body of the program logic, since if the subroutine is called
while the reused temp registers are in use, their values will get clobbered.
Candidate fix for ticket [3a77c9714e63330]

FossilOrigin-Name: 092d53315e50be42b51ef7b3069c82c32a129b6a
 2011-12-06 13:24:59 +00:00
drh
b07028f71c Add assert() statements and eliminate needless variable assignments in order 
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
drh
6b93c9ae24 Make sure the query optimizer for aggregate queries knows that expressions 
(x='a') and (x='A') are different.  Ticket [fa7bf5ec94801e7e]

FossilOrigin-Name: e43da426e66e6b63d5ed9610a6308aba0089313b
 2011-10-13 15:35:52 +00:00
drh
dfd2d9f6c9 Fix a problem with SQLITE_OMIT_TRACE that was introduced by the recent 
OP_Once change.

FossilOrigin-Name: 96be3f7b59b3ed4703b907e29db629df34b2b56f
 2011-09-16 22:10:57 +00:00