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Author SHA1 Message Date
drh
e09f43f8b7 Another improvement to OP_Function and an improvement to OP_Move. 
FossilOrigin-Name: 70b056fb6f60cdfbe24e4b77a1770eef064a73c6
 2013-11-21 04:18:31 +00:00
drh
76694c3ae5 A simple change to the OP_Function opcode improves overall performance by 
about 0.5%.

FossilOrigin-Name: b890eefd57fbd189f7df611e82eb1fb4b197e1c3
 2013-11-21 03:43:12 +00:00
drh
f93cd949a0 Performance optimization to the OP_Next and OP_Prev opcodes. 
FossilOrigin-Name: ecaac28a2e78aca148fc614fe54bf2706aed8be2
 2013-11-21 03:12:25 +00:00
drh
3630a408f2 Refactor the OP_Column opcode to make it clearer and easier to maintain. 
Overall, performance tests show about a 1% speed increase with this change.

FossilOrigin-Name: 972881c6d394c199961f01dcbeb4a6e8b5c919a1
 2013-11-21 01:33:45 +00:00
drh
5cc1023e1c Reduce the size of VdbeCursor again, this time without a performance hit. 
FossilOrigin-Name: 933939932c44bccb0958f203a5bd24e683c1cf38
 2013-11-21 01:04:02 +00:00
drh
1fd522ff49 Unpack some fields, adding some space back to the VdbeCursor object, 
in order to help the code to run a little faster.

FossilOrigin-Name: f8d5efcd7b92492b833b6cd1cb6bec006c6a0809
 2013-11-21 00:10:35 +00:00
drh
14da87f8c5 Reduce the size of the VdbeCursor object from 144 to 120 bytes. 
FossilOrigin-Name: 5f9d50688508affd0bc8e4d52e21dacfacdbb5ce
 2013-11-20 21:51:33 +00:00
drh
380d685133 Improved comments on the OP_Column changes. Optimize out loading of overflow 
pages for content with zero length.  Add test cases for the latter.

FossilOrigin-Name: 0e05679db7aa302a49e087a81f85203844b98cbe
 2013-11-20 20:58:00 +00:00
drh
c8606e416a Further performance tweaks to OP_Column. 
FossilOrigin-Name: 0e3f5df695216a27602a53eed5d25231b055adc8
 2013-11-20 19:28:03 +00:00
drh
399af1d2c2 Refactoring the OP_Column opcode for improved performance and 
maintainability.

FossilOrigin-Name: 7c914e3997d2b28164a2fa7eb4398262b6ddb4b2
 2013-11-20 17:25:55 +00:00
drh
79353dbd5f Simplifications to the VdbeCursor object. 
FossilOrigin-Name: 5562cd343d8f69242e06a51a7f1aef7ee7d78eec
 2013-11-20 02:53:58 +00:00
drh
83b301b0af Performance improvement for the OP_MustBeInt opcode in the VDBE. 
FossilOrigin-Name: 96a65388e75fed96e2e73ef65726f6db88cc5ccd
 2013-11-20 00:59:02 +00:00
drh
707f1c560a Fix a harmless MSVC compiler warning. 
FossilOrigin-Name: 6cc023bb29be51847fbbfab95c24fc89993ccdba
 2013-11-19 18:17:20 +00:00
drh
c138dafe88 Minor performance improvement to sqlite3SerialTypeGet(). 
FossilOrigin-Name: 17e8524fc05aa1e6074c19a8ccccc5ab5883103a
 2013-11-19 13:55:34 +00:00
drh
6bc69a2d4b Change Noop-comments in where.c into Module-comments, so that they are 
omitting without SQLITE_ENABLE_MODULE_COMMENTS.

FossilOrigin-Name: 3e577f40183c56e60866d8382b044688a1b77eaf
 2013-11-19 12:33:23 +00:00
drh
5c82f4df9f Avoid seeking on the main data table during the first loop of an UPDATE 
if an index is sufficient to check the WHERE clause.

FossilOrigin-Name: 57158d9daf4d777411fffb1c1d20d89b291d9214
 2013-11-19 02:34:11 +00:00
drh
f37139f65b Fix an requirement mark in a test script so that it matches the 
typo-corrected requirement.  No changes to code.

FossilOrigin-Name: 072412d5e3f92c9c6548f5c86d396d3f024df3f7
 2013-11-19 00:31:25 +00:00
drh
64ff26f741 Add comments identifing where the skip-scan option is decided in the 
query planner, to aid in tuning that decision.  No changes to code.

FossilOrigin-Name: e9df04cec48bb8b4ea26ec9024a22ea42b2338eb
 2013-11-18 19:32:15 +00:00
drh
2365bac1e2 Fix documentation typos. No changes to code. 
FossilOrigin-Name: 7caeb09c52bde4649b02b339f611c8e30f6d1c68
 2013-11-18 18:48:50 +00:00
drh
2bea7cde6e Fix harmless compiler warnings from clang scan-build. 
FossilOrigin-Name: 8d002740bffca2a76d2dfbc1a67293d34f9de9ba
 2013-11-18 11:20:50 +00:00
dan
c4650bb33d Fix a problem with the shell tool EXPLAIN indentation code and VDBE sub-programs. 
FossilOrigin-Name: 9c8d6856253f8da06b2cb5dc6bd89b6952fa03ed
 2013-11-18 08:41:06 +00:00
drh
e73e067187 Enable the ONEPASS optimization for DELETE, for both rowid and WITHOUT 
ROWID tables.

FossilOrigin-Name: 44a07afdd9b3ae2460bc963383295deb0915f899
 2013-11-18 03:11:54 +00:00
drh
83d47afe24 Make sure one-pass DELETE for WITHOUT ROWID tables correctly positions the 
PRIMARY KEY cursor.  Make the same fix for UPDATE.

FossilOrigin-Name: 6bd5750b7d5da221b0689f6df6be5ed0dce61bec
 2013-11-17 02:42:02 +00:00
drh
c51331d16d Fix a couple of minor problems with the new delete logic. 
FossilOrigin-Name: a11243f840d35aaed8ee3b9901c3950bc584a417
 2013-11-16 23:16:31 +00:00
drh
52a82e6966 Fix an OOM-recovery problem in the DELETE code generator. 
FossilOrigin-Name: dc7be158b82ab9156d0fcdf3394f881eac4d23c3
 2013-11-16 23:03:06 +00:00
drh
9612947260 Combine the rowid and WITHOUT ROWID paths for DELETE into a single path. 
FossilOrigin-Name: c4734b881a64a9d21d03a14e901785797577fbd8
 2013-11-16 22:48:52 +00:00
drh
156c7919d9 The one-pass optimization is now working for DELETE on WITHOUT ROWID tables. 
FossilOrigin-Name: e4d220a381388f900a95d1b656a82f14c837f92e
 2013-11-16 20:45:01 +00:00
drh
6a53499a20 Enhance the DELETE logic so that it can make use of WHERE_ONEPASS_DESIRED 
for rowid tables.

FossilOrigin-Name: 8f479a72758ab6fedb171ada612b1963143c32fa
 2013-11-16 20:13:39 +00:00
drh
aedfc5078a Fully constraint the ORDER BY on the top-10 line of the --summary output 
from the wordcount test program.  Add the run-wordcount.bash script for
running wordcount in various configurations.

FossilOrigin-Name: 7edf39eb93a8f9059a788f5fccf41c2be40afd4d
 2013-11-16 15:35:18 +00:00
drh
64bbbf3383 Avoid unnecessary OP_IfNull checks when doing a range query where there 
is a constraint on the lower bound of the range.

FossilOrigin-Name: de08a7e7abbad9b94d0268d096ef4555d31c8b0c
 2013-11-16 14:03:53 +00:00
drh
e6d058cd97 Simplification and performance improvement to the logic that factors 
constant expressions ouf of inner loops.

FossilOrigin-Name: ee9353fdf3c8f19cd3c344ea8fb7c6d13cadd632
 2013-11-16 13:55:34 +00:00
drh
143867516b Fix testcase misc7-16 so that it works with the new UNIQUE constraint error 
message format.

FossilOrigin-Name: c7f2ed9f44be3b66a542ee42c0db63bab8ffd2db
 2013-11-16 12:56:46 +00:00
drh
85f8aa7907 Add ALWAYS and NEVER macros to currently unreachable but important branches in 
sqlite3ExprCompare().

FossilOrigin-Name: cee835fe902e46f283257fb8ec9d9744c7d6dd77
 2013-11-15 20:06:26 +00:00
drh
8e2ea000b5 Merge the operator comment fixes from trunk. 
FossilOrigin-Name: 9f14f55c8ab77e73dbffb7a9c99422bef14cc17a
 2013-11-15 19:00:20 +00:00
drh
40864a1401 Fix comments on the OP_Divide and OP_Remainder operators, especially the 
"Synopsis:" comment, so that they agree with the actual implementation.

FossilOrigin-Name: cc17f1f05f15e9c62659a49c0656ff2b667bf701
 2013-11-15 18:58:37 +00:00
drh
c2acc4e466 Changes to make the new constant expression factoring logic more general 
and more testable.

FossilOrigin-Name: d10fb49a92f5f6e93093ae83544e5aec7984361a
 2013-11-15 18:15:19 +00:00
drh
a0d6e3a501 Add test cases for INSERT INTO ... DEFAULT VALUES on tables with numeric 
constants in CHECK constraints.

FossilOrigin-Name: 79ec485b548fcfc508c4d5fa32ed0604e1b0c5d9
 2013-11-15 16:48:23 +00:00
drh
10d1edf0b6 Improvements to the Expr comparison routine to make it more general. 
Improvements to unary-minus code generation so that it can make use of
a global constant register with a zero value.

FossilOrigin-Name: 835be656bb0e83c8108104869166aa9dd850d265
 2013-11-15 15:52:39 +00:00
drh
776f3a2fa9 Add the --query option to the wordcount test program. 
FossilOrigin-Name: 5960d11eba4fc6ca136331279689424d03bd6e76
 2013-11-15 13:12:30 +00:00
drh
33cad2fb46 Simplify the range scan code generate while also avoiding an unnecessary 
OP_Affinity opcode.

FossilOrigin-Name: 372686bfbb1da08b04bddb085e30da5dbc8b30d8
 2013-11-15 12:41:01 +00:00
drh
7c89bed621 Merge EXPLAIN fixes from trunk. 
FossilOrigin-Name: cd579727b107a07140b94f5839d193959d29e6db
 2013-11-15 03:30:07 +00:00
drh
72dbffd726 Fix a typo in the "synopsis" for the OP_Lt opcode that causes an 
incorrect comment to be added to EXPLAIN output.

FossilOrigin-Name: d99a30a25d6102c389f1fb5ec389c137168615e9
 2013-11-15 03:21:43 +00:00
drh
602320e326 Another adjustment to the EXPLAIN indentation logic, in order to deal with 
the sorter loop on a CREATE INDEX statement.

FossilOrigin-Name: cbe85cc2a991d89a6cca391ffa1be0582a684e49
 2013-11-15 03:16:34 +00:00
drh
f30a969b80 Rework the logic that factors constant expressions out of inner loops, making 
it both simpler and faster.

FossilOrigin-Name: 8dc5c76c766828d7c28090bec30ff48227e7b140
 2013-11-15 01:10:18 +00:00
drh
01752bc805 Adjust the command-line shell EXPLAIN indentation logic to handle the 
second loop of an UPDATE that reads out a RowSet.

FossilOrigin-Name: ea141a9b87dbb5fa1402bf7f6e36e89cc9de3cb3
 2013-11-14 23:59:33 +00:00
drh
052e6a8a07 Remove an unused local variable. 
FossilOrigin-Name: 10d59226382adcb8016fc2d927e5a0c0b36f3980
 2013-11-14 19:34:10 +00:00
drh
400fcbad71 Simplification to the progress callback check. On branch removed. 
FossilOrigin-Name: 24ef16548eebcdb9d8b40308f6a16dabf8f8d474
 2013-11-14 00:09:48 +00:00
drh
e6400b9901 Make sure the progress callback is invoked prior to an SQLITE_ROW return if 
it is overdue to be called.

FossilOrigin-Name: 21f59b04f74738d08ebad693646bbaea24dc45ef
 2013-11-13 23:48:46 +00:00
drh
1f57794c92 Merge the skip-scan enhancement into trunk. 
FossilOrigin-Name: b0bb975c0986fe01f1184c1d4888fe397174ad0f
 2013-11-13 20:46:11 +00:00
drh
d24474475e Import the "PRAGMA vdbe_eqp" enhancement and the enhanced EXPLAIN formatting 
the shell from trunk.  Fix a bug in skip-scan and add a test case to prevent
a regression.

FossilOrigin-Name: f668616a29686f3ce532731c534b168e536adbb5
 2013-11-13 19:01:41 +00:00