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16 Commits

Author SHA1 Message Date
drh
b1d607de25 Improvements and simplifications to the equality seek logic. Tests are 
adjusted so that they all pass now.

FossilOrigin-Name: 997ce6c90b454c03cc2ef6934752ee8dd2e520e3
 2015-11-05 22:30:54 +00:00
drh
f9c8ce3ced Standardize the error messages generated by constraint failures to a format 
of "$TYPE constraint failed: $DETAIL".  This involves many changes to the
expected output of test cases.

FossilOrigin-Name: 54b221929744b1bcdbcc2030fef2e510618afd41
 2013-11-05 13:33:55 +00:00
drh
00012df46d Add the conflict2.test script. Fix issues discovered by this script. 
FossilOrigin-Name: 294ed33756b06375e56c41f1088d42ee48adbdc8
 2013-11-05 01:59:07 +00:00
mistachkin
48864df97d Many spelling fixes in comments. No changes to code. 
FossilOrigin-Name: 6f6e2d50941e444ebc83604daddcc034137a05b7
 2013-03-21 21:20:32 +00:00
drh
3f4d1d1b02 Attempt to use a covering index even on a full table scan, under the theory 
that the index will be smaller and require less disk I/O and thus be faster.

FossilOrigin-Name: cfaa7bc12847a7006ccc93815f2395ad5259744a
 2012-09-15 18:45:54 +00:00
drh
c633908199 Wrap all automatic index changes inside SQLITE_OMIT_AUTOMATIC_INDEX. Add 
the automatic_index PRAGMA to turn it on and off.

FossilOrigin-Name: a811a47fbe4f757a7ab575ae5a0f65177a3f07c0
 2010-04-07 16:54:58 +00:00
drh
a21a64dd0c Veryquick.test is now working. The SQLITE_STMTSTATUS_AUTOINDEX counter 
added.

FossilOrigin-Name: abbf16e5e7895971710fb3a8fd9c782fc1218a77
 2010-04-06 22:33:55 +00:00
danielk1977
a9d1ccb9b0 First pass at optimizing max()/min() as described in #2853. Some refinements to come. (CVS 4687) 
FossilOrigin-Name: c449e04f1870b1ff726c95c0bf1c6c6a22ca588a
 2008-01-05 17:39:29 +00:00
drh
495c09a49a Make the ORDER BY clause return equal elements in the same order they were 
seen (a stable sort).  It was returning them in exactly the reverse order. (CVS 2439)

FossilOrigin-Name: e8391491a68018406e30c2a699a4cab9e0de092c
 2005-04-01 10:47:40 +00:00
danielk1977
3e8c37e7f8 Modify test scripts to work when SQLITE_OMIT_SUBQUERY (along with other OMIT macros) is defined. (CVS 2251) 
FossilOrigin-Name: bb0254ab14417f0ab40f10f37cb63a60507f070a
 2005-01-21 03:12:14 +00:00
drh
9012bcbc0a The optimizer now uses only the index and ignores the table if it can get 
away with doing so, thus saving a single BTree search per row of result.
This could potentially double the speed of certain queries.  The
code passes all regression tests but new tests to exercise the new
functionality are yet to be added. (CVS 2170)

FossilOrigin-Name: e5aa489453bf31126da6473ef93c89ec27935cde
 2004-12-19 00:11:35 +00:00
drh
b6c29897eb Add initial infrastructure for cursors. In where.c, optimize out clauses 
of the form "ORDER BY rowid" if a table scan is being performed.  Do a
reverse table scan if "ORDER BY rowid DESC" is present. (CVS 2141)

FossilOrigin-Name: fc8c1393c86017a816beb52725b68af3b973f979
 2004-11-22 19:12:19 +00:00
drh
6bf895708c Update tests to work even if some features of the library are disabled. (CVS 2050) 
FossilOrigin-Name: b11fc9b3f3a2711f98e7e45724aa1d30081197f3
 2004-11-03 16:27:01 +00:00
drh
1af3fdb4dc An improved fix for the min() problem of ticket #800. (CVS 1804) 
FossilOrigin-Name: b6e8b7a13cd9f90e2f7d963d9ddbe591571f3a27
 2004-07-18 21:33:01 +00:00
danielk1977
dc1bdc4f9d Fix various collation sequence issues. (CVS 1568) 
FossilOrigin-Name: 66835ee67051027456a536e33b2f88a741654525
 2004-06-11 10:51:27 +00:00
danielk1977
0202b29ef7 Some progress on user-defined collation sequences. (CVS 1544) 
FossilOrigin-Name: c634e71f1909819fb55c728bc410e5cc390428e3
 2004-06-09 09:55:16 +00:00