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pattern-compare-optimization
Commit Graph

11807 Commits

Author SHA1 Message Date
drh
4360fcea6d Take care not to try to generate code for the ATTACH and DETACH commands 
if there were syntax errors during parsing.
Fix for ticket [2f1b168ab4d4844]

FossilOrigin-Name: b0ff183b8ffdbebece06cfea1c6781fc0e8e8547
 2016-11-11 03:37:24 +00:00
drh
7a1c28defe Avoid a few unnecessary calls to sqlite3BtreeMovetoUnpacked(). 
FossilOrigin-Name: eac0e827a61cfec4dd9b6d407ff398e9fda3510b
 2016-11-10 20:42:08 +00:00
dan
257c13fa00 Avoid storing redundant fields in sorter records when the sort-key and data have 
fields in common (as in "SELECT a FROM t1 ORDER BY 1").

FossilOrigin-Name: 0af62fdbd8e2aab14718ff8bcb5934f05463c176
 2016-11-10 20:14:06 +00:00
drh
c6c9e158c5 When doing a REPLACE on a WITHOUT ROWID table with no secondary indexes, 
bypass the OP_NoConflict/OP_Delete sequence and directly overwrite any
preexisting row, for a performance increase.

FossilOrigin-Name: f7041cbb63b912f9ecad538804b6f2383efbec4e
 2016-11-10 17:01:36 +00:00
drh
bf2f5739c9 Remove C++ style comments. No code changes. 
FossilOrigin-Name: 42f8aa6231bf4ed74bebdc85aa79d23dc20b3c14
 2016-11-10 16:07:43 +00:00
drh
2c4dfc3095 Add the unpacked key fields to OP_IdxInsert for INSERT and UPDATE statements. 
FossilOrigin-Name: 67602e40f122cbb6354048a64c5d3a72b2855ec7
 2016-11-10 14:24:04 +00:00
drh
eaf6ae2992 Comment changes that attempt to better explain the behavior of the "seekResult" 
field on VdbeCursor objects and the seekResult parameter to
sqlite3BtreeInsert() and the OPFLAG_USESEEKRESULT flag on insert opcodes.
No changes to code.

FossilOrigin-Name: 345b46be75bdf6f9fb7367a6164d89bae11995a6
 2016-11-09 20:14:34 +00:00
drh
7405fa745e Fix a simple comment typo. No changes to code. 
FossilOrigin-Name: 51d0aed8d63d0710e4aa8925ff18cf3c45dc9e42
 2016-11-09 16:03:36 +00:00
drh
4a8b013ef6 Make use of the unpacked key on the OP_IdxInsert on sorters with a LIMIT. 
FossilOrigin-Name: 42db7cd2c0b367f7dfe733bdaf006538937b812a
 2016-11-09 01:38:56 +00:00
drh
fb8c56f21b Fix a typo on the OP_IdxInsert documentation. No code changes. 
FossilOrigin-Name: e4acd98207bf12b28f6c0f77896ba8f0b0a155d5
 2016-11-09 01:19:25 +00:00
drh
7723371eb7 Remove the "experimental" marking from the sqlite3_preupdate interfaces. 
But be sure all the interface definitions are within 
documentation.

FossilOrigin-Name: d6dd2ad35ed17e980ed564688499c802e5850386
 2016-11-09 00:57:27 +00:00
drh
9b4eaebc68 Enhance the OP_IdxInsert opcode to optionally accept unpacked key material. 
FossilOrigin-Name: 89d958abbac45f2ca5954080cd9e74ec9a07ebb2
 2016-11-09 00:10:33 +00:00
dan
3b908d41a0 Avoid superfluous cursor seeks in "INSERT OR REPLACE" statements. 
FossilOrigin-Name: bec5b6d4d083556d111a89186b4f7b35b5e7cebf
 2016-11-08 19:22:32 +00:00
drh
9d06ff2cb7 Avoid generating OP_TableLock unnecessary instructions on btrees that 
are not sharable.

FossilOrigin-Name: 8cb8516d2009d52d35a22263e4c892f162b34b81
 2016-11-08 17:19:22 +00:00
dan
a2bfa046ea Avoid a crash that can occur after an obscure OOM in the built-in INSTR() 
function.

FossilOrigin-Name: b86b79c442a58d10aa005ba4f34095375a88d242
 2016-11-04 12:05:29 +00:00
drh
54fc5cc2ae Add an assert() to silence a coverity false-positive. 
FossilOrigin-Name: 97354093bceff28714a605068851cfa026c8272a
 2016-11-04 11:23:30 +00:00
drh
59ce2c434c In the command-line shell, fix the .imposter command so that it works 
with indexes on expressions.  Fix the ".mode quote" mode so that it works
with ".headers ON".

FossilOrigin-Name: ba9873da94d21873ff76f16a5332fc0092d83f70
 2016-11-03 13:12:28 +00:00
drh
16eb59484f Add the ".imposter" command to the command-line shell. 
FossilOrigin-Name: be3ec8fdcf1541017ca9375df07645db2a9a3f5a
 2016-11-03 13:01:38 +00:00
drh
6027561178 Fix an possible NULL pointer deference in the command-line shell that can 
occur when using imposter mode.

FossilOrigin-Name: ad08753a8bbf073ec4af9c3a5783ed664244d954
 2016-11-03 02:25:30 +00:00
dan
75ba676790 Fix an issue that was causing the new database image to be assembled entirely 
in heap memory when VACUUMing a database, even if it should use a temp file.
This could cause SQLITE_NOMEM errors when vacuuming very large databases on
32-bit systems.

FossilOrigin-Name: 3028845329c9b7acdec2ec8b01d00d782347454c
 2016-11-02 14:50:19 +00:00
drh
e77caa191b Fix a requirement mark. No changes to code. 
FossilOrigin-Name: d18f61b78c8fafef742efbc890382537e8584180
 2016-11-02 13:18:46 +00:00
drh
1ad93a003d Use NOT NULL partial indexes when the query is constrained by a single 
LIKE or GLOB.

FossilOrigin-Name: 9b3a3b41b59a7ce7d3dd82c7402d6fdc6a5ca43c
 2016-11-02 02:17:52 +00:00
dan
298af02308 Add the SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE sqlite3_dbconfig() option - for 
disabling SQLite's default checkpoint-on-close behaviour.

FossilOrigin-Name: 093d2fc2288b75c15ccf877bfa0e622d3918a562
 2016-10-31 16:16:49 +00:00
dan
dadafa881f Remove the mutex from test_multiplex.c. 
FossilOrigin-Name: 6374978e8f1ac091394a9f5a1896be92af658bcd
 2016-10-27 14:51:02 +00:00
drh
c52496f57f Make sure left-join markings are transferred to the virtual scalar 
subexpressions when decomposing a vector comparison in the ON clause of
a LEFT JOIN.
Fix for ticket [fef4bb4bd9185ec8f].

FossilOrigin-Name: 619f5cc71774a37648e185c8502d7af14eb09b7f
 2016-10-27 01:02:20 +00:00
drh
9904298bb3 Small size reduction and performance enhancement in whereScanInit(). 
FossilOrigin-Name: c23f5ef337533c1ec6e3ba78a2910352181cc9ee
 2016-10-26 18:41:43 +00:00
drh
392ddeb12d Small size reduction and performance improvement in whereScanNext(). 
FossilOrigin-Name: d861ee17eb900a607de6ec3f4a5d5c24cfb834a0
 2016-10-26 17:57:40 +00:00
dan
b40897ab5e If all branches of an OR optimize scan that is the rhs of a LEFT JOIN use the 
same index, set the index cursor to return NULL values if there are no matches
for a row on the lhs.

FossilOrigin-Name: e7b9bc678ecb75c594d9d3ade12a99a8d551cdc9
 2016-10-26 15:46:09 +00:00
dan
5c35e90377 Add compile time option SQLITE_ENABLE_URI_00_ERROR. If defined, any "%00" 
escape found in a URI is treated as an error.

FossilOrigin-Name: e8a9bfece27e2af178a206ad6bce3f24d64e7ee4
 2016-10-26 12:15:41 +00:00
drh
7ad3eb63cf Performance optimization in moveToRoot(). Avoid repeated validity checking of 
the root page on each call. Once is enough.

FossilOrigin-Name: 98795c2dd9a6d8fa8d49a9f5c36cdf824cae7246
 2016-10-24 01:01:09 +00:00
dan
e43635aaa7 In the sessions module, avoid recording a change if an UPDATE statement 
overwrites a column with REAL affinity containing an integer value with the same value.

FossilOrigin-Name: b861328ab9ceec6926d97658c3606e6ae9ad39bf
 2016-10-21 21:21:45 +00:00
drh
41f5f6ec2c Add ".mode quote" to the command-line shell. 
FossilOrigin-Name: c4f5fa78cd8207ce1e46e32e632b8f6ee86047e1
 2016-10-21 17:39:30 +00:00
dan
e24452edef Avoid using the "direct overflow read" optimization to read large blobs if the 
pager layer has a wal file open - even if the database header indicates that
the db is not a wal database.

FossilOrigin-Name: b54c15f11796a75683eec4b502a22ccb87d621c6
 2016-10-21 10:49:39 +00:00
dan
ceb97c1107 If SQLITE_DIRECT_OVERFLOW_READ is defined at compile time, add "DIRECT_OVERFLOW_READ" to the list of symbols returned by "PRAGMA compile_options". 
FossilOrigin-Name: b7d9727bff2e840af4b090872c991693e78e6076
 2016-10-21 10:09:22 +00:00
drh
c3191d236a Minor simplification of the comparison opcodes. 
FossilOrigin-Name: 56474ebca3fdddb8f3c5156f06dc42dc0a65256c
 2016-10-18 16:36:15 +00:00
dan
1480095ff5 Changes to support interrupting a checkpoint using sqlite3_interrupt(). 
FossilOrigin-Name: c88d36e251abec24aa7e37cf550e148904b9fd2d
 2016-10-17 15:28:39 +00:00
drh
cee11adaaa Small size reduction and performance increase in the string duplicator. 
FossilOrigin-Name: cda998f080cb00779d8c0d1c83d8fe2b74462cd4
 2016-10-17 00:48:06 +00:00
drh
f013e20c66 Add documentation for the OP_SorterInsert opcode, formerly omitted by mistake. 
No changes to code.

FossilOrigin-Name: 16d88a907730e3773a1320dbaf1f82c2bc71d71f
 2016-10-15 18:37:05 +00:00
mistachkin
8705f868e0 Add the SQLITE_FCNTL_WIN32_GET_HANDLE file control. 
FossilOrigin-Name: 16039be3739b8d3b34a1e6093eaebb09e07f984b
 2016-10-14 21:27:50 +00:00
drh
989412a1cf Take care to avoid integer overflow when doing the initial page cache 
allocation with an excessively large cache_size setting.

FossilOrigin-Name: 4d66ac98deaa85218be7ff0eb254f78b96d8e8d4
 2016-10-13 12:56:18 +00:00
drh
c436a03d02 Avoid reading the -1-th element of an array in the query planner. Fix to a 
bug introduced by check-in [8e2b25f9b8a7] from earlier today.  Curiously,
the problem only appeared on 32-bit systems.

FossilOrigin-Name: 443913d582bcd953d85159047541592e2f68ade3
 2016-10-12 18:55:53 +00:00
drh
013ae68b25 New testcase() macros to ensure coverage of the ORDER BY LIMIT optimization 
code in where.c.

FossilOrigin-Name: 61f0526978af667781c57bcc87510e4524efd0d8
 2016-10-12 15:15:30 +00:00
dan
83465a662f Fix a problem affecting queries that match the pattern (... WHERE ipk IN (....) ORDER BY ? LIMIT ?). Fix for [96c1454c]. 
FossilOrigin-Name: 8e2b25f9b8a7ed087d3cece74239814bee19429e
 2016-10-12 14:48:00 +00:00
dan
90b2fe6b1e When handling ORDER BY expressions, do not assume all values of an indexed expressions are distinct. Fix for [4766f444]. 
FossilOrigin-Name: aebe429e52ffef026cb0803fb164339d61bd2e88
 2016-10-10 14:34:00 +00:00
drh
48590fcb37 Make sure indexes on expressions skip over initial NULL values in the 
index.  Fix for ticket [4baa464912129477f3c9]

FossilOrigin-Name: 71797ba431085f9ae381ed5ea6471967926f4043
 2016-10-10 13:29:15 +00:00
dan
320d4c304d Add missing "static" to internal function whereRangeVectorLen(). 
FossilOrigin-Name: cbed3d75cf9a24037263d126727db7dd048a4f97
 2016-10-08 11:55:12 +00:00
drh
e3c6b61cee Fix harmless compiler warnings. 
FossilOrigin-Name: 2dde3375124198560c8ff15f87aadde2afd722c5
 2016-10-05 20:10:32 +00:00
drh
da5c62400f Do not set MEM_Blob unless the appropriate fields of the Mem object have 
been correctly initialized.

FossilOrigin-Name: a596b7c6cc780525120604090493f3f7d962b9fa
 2016-10-05 15:02:00 +00:00
drh
44728d7e01 Do not bother to initialize unused fields in the BtreePayload object. 
FossilOrigin-Name: b10d0f939c82c4de3faa90b86de9ec4a89992856
 2016-10-04 00:47:26 +00:00
drh
a71c743aae Allow deterministic functions in the WHERE clause of a partial index. 
FossilOrigin-Name: c6e9b9421805c904b20900b711fa0e51773aef3e
 2016-10-03 18:13:23 +00:00