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b6c29897eb
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24 Commits

Author SHA1 Message Date
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
92febd92ad Tcl interface transfers values directly between SQLite and Tcl_Objs, without 
at translation to strings. (CVS 1898)

FossilOrigin-Name: e97c331362545ce21117776c7b61d3488668f2bf
 2004-08-20 18:34:20 +00:00
drh
ce665cf60e Eliminate the OP_SortMakeRec and OP_SortCallback opcodes. Sort using the 
standard record format. (CVS 1426)

FossilOrigin-Name: 25643a0137d395572f16cfec3ab3327d913138ba
 2004-05-21 03:01:58 +00:00
drh
736c22b803 Most sorting problems are fixed. Dead code has been removed. 3 test failures 
remain but will be fixed by the new function API once it gets implemented. (CVS 1425)

FossilOrigin-Name: 3b55095e036d68886d007239333bbf90acd15692
 2004-05-21 02:14:24 +00:00
drh
7cf6e4de35 Change opcode names and comments to better describe the operation of 
the incrKey flag.  OP_MoveTo becomes OP_MoveGe. (CVS 1407)

FossilOrigin-Name: 8f249c45cbc77f4320798ff1a830b55e5c74888a
 2004-05-19 14:56:55 +00:00
drh
772ae62a82 Bug fixes in where.c. The where.test test works again. (CVS 1406) 
FossilOrigin-Name: 7c31e257e2d109bfedf63dc307b422e1abd46d0e
 2004-05-19 13:13:08 +00:00
drh
ed717fe3b2 Enhance the "PRAGMA integrity_check" command to verify that all indices are 
correctly constructed.  New calls to integrity_check are made in the test
suite. These changes are intended to prevent any future problems such
as seen in ticket #334. (CVS 1024)

FossilOrigin-Name: c9734c27074d2039a1896a8c6965c08d03711b13
 2003-06-15 23:42:24 +00:00
drh
7bdc0c1def Modify the optimizer so that it does not assume that functions are 
constant. (CVS 920)

FossilOrigin-Name: 767f1af236d115e8388e1dcc28a4df1be48d6c85
 2003-04-19 17:27:24 +00:00
drh
37ea94b8c9 Bug in WHERE clause processing fixed. Ticket #298. (CVS 919) 
FossilOrigin-Name: 9b619c98b586a207a87942640d3a94220ff8ab02
 2003-04-19 16:34:04 +00:00
drh
d4d595f94c Make sure the min() and max() optimizations work on empty indexed tables. 
Ticket #296. (CVS 914)

FossilOrigin-Name: 98ef6110068e5ed3cd77a14b004f890b79b731f7
 2003-04-17 12:44:23 +00:00
drh
1a844c380b Fix a bug in the reverse scan logic that comes up when the table being 
scanned is empty.  Add additional tests for the reverse scan. (CVS 797)

FossilOrigin-Name: 0051c87d5e8d07fae09da2eb7b0d8cbd1bbd3c8e
 2002-12-04 22:29:28 +00:00
drh
dd4852c3d1 Fixes to the logic that decides if the ORDER BY can be ignored due to the 
use of an index.  Tests updated. (CVS 796)

FossilOrigin-Name: bfb9a2aa939ecffc5dc2c7c23bddd57d357bdf13
 2002-12-04 21:50:16 +00:00
drh
6977fea801 Correctly handle column names and string constants in parentheses. 
Fix for ticket #179. (CVS 770)

FossilOrigin-Name: 3b68aa25c451b7c09ece457ac2b70a9a5d93508a
 2002-10-22 23:38:04 +00:00
drh
c330af1dca Disable sorting by indices if there is a COLLATE subclause in the 
ORDER BY clause. (CVS 713)

FossilOrigin-Name: 2438da791afb53b4f1c7a9ff9705d393c86f3cbd
 2002-08-14 03:03:57 +00:00
drh
e31847449e The query optimizer now attempts to satisfy an ORDER BY clause using 
an index.  Sorting is still used if there are no suitable indices. (CVS 628)

FossilOrigin-Name: f09e19b43ef61073713cf32282c90ea666229eba
 2002-06-19 14:27:05 +00:00
drh
df199a25bd Make the LIMIT clause work even if the destination of the SELECT is 
something other than a callback.  (Ticket #66) (CVS 619)

FossilOrigin-Name: 699cf362083043615eb88635a228bfa46a315c9c
 2002-06-14 22:38:41 +00:00
drh
48185c15c7 Added tests for the new IN operator optimizer and fixed a bug that the 
new tests found.  This completes the implementation of enhancement #63. (CVS 612)

FossilOrigin-Name: 2a710e18176c486525f0abb06644a511a2cd1d7a
 2002-06-09 01:55:20 +00:00
drh
08192d5f76 Fix for ticket #31: Do not attempt the flattening optimization if the 
subselect does not contain a FROM clause.  Handle the special case where
a WHERE clause is constant. (CVS 548)

FossilOrigin-Name: 24e4cf73d22bb41d26bf3c833f1854a9c90923e8
 2002-04-30 19:20:28 +00:00
drh
8aff10153e Bug fixing in the new integer primary key code. (CVS 334) 
FossilOrigin-Name: 29cab124b4f7eae9d9feb60d2f3a2c443fd9b9aa
 2001-12-22 14:49:24 +00:00
drh
487ab3ca18 The new code for taking advantage of inequalities in WHERE clauses 
is in place.  It appears to work. (CVS 305)

FossilOrigin-Name: 262bcd17df19f45def6144b5a7e0602ca5b03deb
 2001-11-08 00:45:21 +00:00
drh
b19a2bc603 Disclaimed copyright. Preparing for release 2.0. (CVS 250) 
FossilOrigin-Name: 4e926efe2b59adfec4086eb1d2ba830238facb4c
 2001-09-16 00:13:26 +00:00
drh
c87fa69a29 Add index access methods to the DBBE in preparation for adding a new 
DBBE for the btree.c module. (CVS 236)

FossilOrigin-Name: c15f6ffc4d41f30a06d750c8015226713ae0126b
 2001-08-19 18:19:46 +00:00
drh
6de4f4ca1c :-) (CVS 93) 
FossilOrigin-Name: 3c0540e6fb103402c3f37fd2df17f9786b363db0
 2000-06-12 12:20:48 +00:00