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357 Commits

Author SHA1 Message Date
drh
41fb367a2c Improved comments. Slightly tighter implementation, but no big changes. 
FossilOrigin-Name: a1b3f28569f2a8d82b2931527fdfe191b421f3e1ea18ee30e04211e1ad645993
 2018-01-12 23:18:38 +00:00
drh
ce2fbd1b02 Add the experimental sqlite3_value_nochange() interface usable by xUpdate 
methods of virtual tables to see if a column has actually changed values.

FossilOrigin-Name: 8b7be15ece9e2e83959bb0e21e240106fe1077431242c3cc6b81f1baa2382f40
 2018-01-12 21:00:14 +00:00
drh
6f390beb7f Add the sqlite3_vtab_nochange() method which virtual table implementations 
can use to optimize UPDATEs.

FossilOrigin-Name: d444b1ff39f0a1673a977b8047e1e14a49d461c9934be080d27c2392a830c1c0
 2018-01-11 17:04:26 +00:00
drh
24cd20ffa4 Fix typo in comment. No code changes. 
FossilOrigin-Name: 2c55571baaae58d6f5b6210cf85d0fa325a9977682bd449e3802191f7a4142de
 2018-01-11 13:43:04 +00:00
drh
8c0833fb21 In the parse tree, combine LIMIT and OFFSET into a single expression rooted 
on a TK_LIMIT node, for a small code size reduction and performance increase,
and a reduction in code complexity.

FossilOrigin-Name: 3925facd942c9df663f9b29b1e6f94f6be14af8c2b99eb691bfc836b4c220826
 2017-11-14 23:48:23 +00:00
dan
3b61ebb8de Omit some extra code from non-SQLITE_ENABLE_UPDATE_DELETE_LIMIT builds. 
FossilOrigin-Name: 72be33f9c84de3ec4afc40549482417456ca82c1d16b473dc034b144055271e5
 2017-11-10 20:13:14 +00:00
dan
b3c16b899b Add SQLITE_ENABLE_UPDATE_DELETE_LIMIT for views and WITHOUT ROWID tables. 
FossilOrigin-Name: 584b88aaf89ab30cb51185396b7b50c6ecba286add023a26ab41d865b9c605ce
 2017-11-09 19:53:06 +00:00
drh
e3740f272b Experimental changes that allow a WITHOUT ROWID virtual table to be writable 
as long as it has only a single-column PRIMARY KEY.

FossilOrigin-Name: ab9ee4c1e64c09c7130e385a23d043d78bad95dff5509c7adc9b992350a4a537
 2017-08-10 15:19:39 +00:00
dan
940b5eaa5e Avoid updating unaffected indexes on a table as part of an UPDATE that requires 
foreign key processing in some cases.

FossilOrigin-Name: 477bea9ed0dd0fa69896bfd16d9b1d22170cbab784e3279ce65c29c47e032f34
 2017-04-11 19:58:55 +00:00
dan
f64ece143c Avoid redundant table b-tree cursor seeks in UPDATE statements that use the 
two-pass strategy.

FossilOrigin-Name: dc555b1039c6930f6d15355c698ff917a85e8056
 2017-01-28 19:45:34 +00:00
drh
da060052e3 Back out check-in [0b3174e0b1364c] and replace it with a better fix 
for ticket [91e2e8ba6ff2e2] - a fix that does not cause the problem
identified by ticket [7ffd1ca1d2ad4ec].

FossilOrigin-Name: 0613665274346917f5482f9210bf0c60a0fed7d9
 2017-01-16 16:43:02 +00:00
drh
ae051a8970 Fix harmless compiler warnings in the UPDATE code generator. 
FossilOrigin-Name: 385db266673abaf7013ffad09b28014c246547ef
 2017-01-12 16:21:54 +00:00
dan
e206ea7f48 Fix a problem causing the pre-update hook to be passed an incorrect rowid 
value in some single-pass multi-row updates.

FossilOrigin-Name: 62257eb53c13d4c7ed128d5d89f6f10d4aff945c
 2017-01-11 20:10:30 +00:00
dan
2c6fec21dc Fix a problem with single-pass multi-row UPDATE statements that invoke REPLACE 
conflict handling.

FossilOrigin-Name: 0a2b8e1b9dc600b5a93622e8eea6218649df5e0f
 2017-01-11 19:03:08 +00:00
dan
372f942f17 Fix a problem preventing UPDATE statements that use a range-scan on the PK 
index of a WITHOUT ROWID table from using a one-pass strategy.

FossilOrigin-Name: cab86c90945126c24c40cf2dedd053a8c46d00d6
 2017-01-11 15:42:14 +00:00
dan
f91c1318f4 Changes to allow some multi-row UPDATE statements to avoid the two-pass 
approach.

FossilOrigin-Name: 46db23ccd116ce5b9d949f9293be8a2818411b46
 2017-01-10 20:04:38 +00:00
drh
f14b7fb73b Add the sqlite3VdbeAppendP4() method for adding P4 content to the most recently 
coded instruction.

FossilOrigin-Name: 28883e8f3e92a8015fb5f6c8ae8580833931543d
 2016-12-07 21:35:55 +00:00
drh
9057fc7c7f Remove the OP_RowKey opcode. Use OP_RowData in its place. 
FossilOrigin-Name: 6ac7b07a4aff2e1a9031289e3dafdb9ac0071c24
 2016-11-25 19:32:32 +00:00
drh
65f38d960d Remove unnecessary OP_Close opcodes for a size reduction and performance 
increase.

FossilOrigin-Name: 32be7aae92ee48bf2cd260ea41e79c2bc62738f9
 2016-11-22 01:26:42 +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
9b4eaebc68 Enhance the OP_IdxInsert opcode to optionally accept unpacked key material. 
FossilOrigin-Name: 89d958abbac45f2ca5954080cd9e74ec9a07ebb2
 2016-11-09 00:10:33 +00:00
drh
69c338263a Rename the Db.zName field to Db.zDbSName to make it more descriptive and to 
distinguish it from all of the other "zName" variables scattered throughout
the code.

FossilOrigin-Name: 92a22f01343a898455fd61c3b8e7d7c954f5b569
 2016-08-18 14:33:11 +00:00
drh
f09c48233a Simplification to the logic used to decide between OP_Seek and OP_NotExists. 
Use OP_NotExists for both DELETE and UPDATE.

FossilOrigin-Name: 3a695263183303e3f64eb2320752d0fdef53eaf2
 2016-05-06 20:23:12 +00:00
drh
74c3302fd1 Avoid compiler warnings and excess opcodes when SQLITE_ENABLE_PREUPDATE_HOOK 
is not used.  Fix the EXPLAIN output for P4_TABLE opcodes.

FossilOrigin-Name: 5ab46d760dff327491703478d6d7c7c44a0147ca
 2016-03-30 12:56:55 +00:00
drh
47e1842e5b Merge all recent enhancements from trunk. 
FossilOrigin-Name: 6a7ee04b0ddac36a87d5ed2ac89a53e537f4d5a3
 2016-03-16 01:16:30 +00:00
drh
8426e36c8f Add the ALLBITS macro as a shorthand for "(Bitmask)(-1)". 
FossilOrigin-Name: 91bd619d27e4d91510a187bbb88de961a31c8a2e
 2016-03-08 01:32:30 +00:00
drh
d8b7d6e44c Merge the changes for the 3.11.0 release candidate from trunk. 
FossilOrigin-Name: 4d7a802e73ef0352f840bc8d74c560afb7666ff7
 2016-02-13 14:07:56 +00:00
drh
bdb00225ab Omit NOT NULL checks on unchanging columns in an UPDATE. 
FossilOrigin-Name: 6a3aaedfb41735996470abbae6d3cd1be1f508b3
 2016-02-10 16:03:20 +00:00
drh
0ac7cfaf99 Merge enhancements from trunk. 
FossilOrigin-Name: a533608cb0de3cbc1e28a794aab99864b8c249f4
 2016-02-05 14:15:34 +00:00
drh
575fad6500 Add the slightly faster sqlite3DbMallocRawNN(db,n) routine for the majority 
cases where db is guaranteed to be not NULL.

FossilOrigin-Name: 0a802e96ab06e2643834b83671fa8353da1a348d
 2016-02-05 13:38:36 +00:00
drh
1bb15fc973 Merge recent enhancements from trunk. 
FossilOrigin-Name: d1a1278d7f3306536dc9cbd8fb300898f1e373e8
 2015-12-02 20:40:26 +00:00
dan
1acb539f4c Add the "colUsed" field to the sqlite3_index_info structure passed to virtual table xBestIndex methods. To indicate the subset of the virtual table columns that may be required by the current scan. 
FossilOrigin-Name: 116b206494eb8ba963c7c5acfbf9e7b6db11c79c
 2015-11-26 19:33:41 +00:00
drh
d286b9fb7d Merge all the latest enhancements from trunk. 
FossilOrigin-Name: 395a153ff7b3c7a72f3d02b6fe76d72383f4e480
 2015-10-30 16:50:00 +00:00
dan
fd261ec67e Modifications to pass a flag to internal routine sqlite3BtreeCursor() when a cursor that is used solely for deleting b-tree entries, or for obtaining the components of keys to delete from other b-trees, is opened. 
FossilOrigin-Name: cdc92919e600007cae5eb61223684f48a65babc0
 2015-10-22 20:54:33 +00:00
drh
ce78bc6e7e Enhance the use of the column cache for UPDATE statements, making them 
more efficient for the case where a column is modified to be an expression
of other unmodified columns.

FossilOrigin-Name: 871e091df651b2275a672c35ff938bd4b6db0d7f
 2015-10-15 19:21:51 +00:00
drh
4918480252 Pull in the latest 3.9.0 tweaks from trunk. 
FossilOrigin-Name: ed174ccf0ae615647ba026fed649d26dc9a98640
 2015-10-10 20:35:10 +00:00
drh
728e0f91bb Compiler warning fixes: Rename some local variables from "j1" to avoid a 
name collision with the j1() bessel function in the math library.  Omit a
dummy initializer that gcc 4.6.3 does not like.

FossilOrigin-Name: 9ddef84d432813f3ece8012047d08441caa3315d
 2015-10-10 14:41:28 +00:00
drh
32af5eda6a Merge recent enhancements from trunk, and especially the fix for 
ticket [1b266395d6bc10].

FossilOrigin-Name: b2face9aa95ade96a5666c70b6b31064c1ad0977
 2015-09-30 14:50:39 +00:00
drh
4b92f98ccc Use symbolic names XN_ROWID and XN_EXPR in place of the (-1) and (-2) 
magic numbers in Index.aiColumn[].  Add asserts to help verify that
Index.aiColumn[] is always used correctly.  Fix one place in FK processing
where Index.aiColumn[] was not being used correctly.

FossilOrigin-Name: 7d272aa62cd4cbbf4b5d04e3b918de27671e8301
 2015-09-29 17:20:14 +00:00
drh
c149f18f4d Create the sqlite3IsToplevel(Parse*) interface to check to see if a top-level 
VDBE is being coded (versus a trigger) and use that interface.

FossilOrigin-Name: 59662cd2b65255a30e1a420331c07c51b644621a
 2015-09-29 13:25:15 +00:00
drh
94f26a1e22 Fix compiler warnings. 
FossilOrigin-Name: d1a0783854d2e9272320d9ddfa58362532f58d1a
 2015-09-29 12:32:56 +00:00
dan
354474ad6d Add tests for fts3 and onepass update/delete operations. Also fix a problem with onepass updates that do not affect any rows. 
FossilOrigin-Name: 820c804468abff692742952de670c5d906a50956
 2015-09-29 10:11:26 +00:00
dan
0f40037eee Also allow UPDATE on virtual tables to use the onepass strategy. 
FossilOrigin-Name: 1aa27d706db9b2e21737ce4b94b47ecd12c2570f
 2015-09-28 20:03:49 +00:00
dan
438b881540 Merge the latest trunk enhancements with this branch. 
FossilOrigin-Name: b7469c44be77358e02892a3abc696f7caa0dcd3b
 2015-09-15 15:55:15 +00:00
drh
91762f2d18 Merge the latest trunk enhancements. 
FossilOrigin-Name: 22ce9218fb2bb56cc5dd4e32077a16f669250d5f
 2015-09-14 10:47:29 +00:00
dan
f0ee1d3c12 Experimental change to use a single-pass approach for DELETE statements on non-virtual tables that do not fire triggers or require foriegn-key processing. 
FossilOrigin-Name: eaeb2b80f6f8f83679c8323a81bb39570ec946fe
 2015-09-12 19:26:11 +00:00
drh
6b86881788 Merge recent trunk enhancements. 
FossilOrigin-Name: 6a513c05850949900f396c7a61accb97cc6d2af5
 2015-09-03 14:48:25 +00:00
drh
34de0c8c5e Merge enhancements from trunk. 
FossilOrigin-Name: 1ab10cbf27245961b40eda1ce70f35646f0a9966
 2015-09-03 14:18:12 +00:00
drh
076e85f59c Add the sqlite3VdbeLoadString() and sqlite3VdbeMultiLoad() routines to help 
with code generation, especially on PRAGMAs.  Rename sqlite3VdbeAddGoto()
to just sqlite3VdbeGoto().

FossilOrigin-Name: 847387ec8e6fef283899578fb232b2c23b00ee5b
 2015-09-03 13:46:12 +00:00
drh
2991ba050b Add the sqlite3VdbeAddGoto(v,i) routine as a shorthand for 
sqlite3VdbeAddOp2(v,OP_Goto,0,i).

FossilOrigin-Name: be78f413df1b0d874b44a866ef6bf17543d7e8a2
 2015-09-02 18:19:00 +00:00