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tcl-init
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2168 Commits

Author SHA1 Message Date
drh
1f613c4df3 Remove an unnecessary local variable from OP_Column, for a small size 
reduction and performance increase.

FossilOrigin-Name: 39543903282409ad3f139f8a0bb376661e7595a33af4f647945b1513a028ccb4
 2017-08-16 14:16:19 +00:00
drh
95b225a46d Performance improvement in the OP_Column opcode. 
FossilOrigin-Name: dc98a92f32511ee322b0207bd286e967248a8e59b418f11168eb31e34b0fa0fa
 2017-08-16 11:04:22 +00:00
drh
6cd8c8c57a Small size and performance in the OP_Column opcode. 
FossilOrigin-Name: 2cf3f3de8a48465bd6b0af7763bfe905f3bb0151488f63c9ecc3147bcb345094
 2017-08-15 14:14:36 +00:00
drh
5859636fb1 Optimization to the comparison opcodes in the byte-code engine. 
FossilOrigin-Name: 654935c7737f1a9e08fde9b220c543e86ff6e05910e2f08973a2f93ab2b3e028
 2017-08-03 00:29:23 +00:00
drh
a485ad191f In the KeyInfo object, refactor the nField and nXField elements into 
nKeyField and nAllField, which are more useful and run a little faster.

FossilOrigin-Name: aea5990eab5e85f92df966aa641db2271c81052010ad2d80982475c4275a1284
 2017-08-02 22:43:14 +00:00
drh
86b40dfd33 Split the OP_Last opcode into OP_Last and OP_SeekEnd. Use OP_SeekEnd to 
position a cursor prior to appending.  Ticket [cb91bf4290c211d].

FossilOrigin-Name: 3e02474c7bbe16891a7cfc8771cf72f64cd2c0692779037982d7d307512a4f23
 2017-08-01 19:53:43 +00:00
drh
8257aa8dbe Add the new sqlite3.mDbFlags field. Factor out bits of sqlite3.flags that 
do not interact with PRAGMA statements into sqlite3.mDbFlags.

FossilOrigin-Name: 3808a00f06d372cc531da039d97bd974e4a6576a30cf63bf562f83f186b313b3
 2017-07-26 19:59:13 +00:00
drh
3e34eabcdf Allow indexes to be created on date/time functions as long as the 'now' 
date and the 'localtime' and 'utc' modifiers are not used.

FossilOrigin-Name: 0a5e1c04d9d07bb7fd6546a9ddac1bf42b19ea19c2b79570aea6cd4226887a27
 2017-07-19 19:48:40 +00:00
drh
00d11d400b Add the SQLITE_STMTSTATUS_REPREPARE and SQLITE_STMTSTATUS_RUN options to 
sqlite3_stmt_status().  Use this for two new columns in the stmts virtual
table.

FossilOrigin-Name: b0b0c8f8d548ef78584ab714ab120b01c1b83fc0d8ae2fd7626b970bab9fca58
 2017-06-29 12:49:18 +00:00
drh
169dd928c5 Add the SQLITE_DBCONFIG_ENABLE_QPSG option to activate the query planner 
stability guarantee.  This involves refactoring the sqlite3.flags bitvector
to carve out a free bit to use.

FossilOrigin-Name: 7076e8283ebae1b45a5d85d9538b49b6da399d38c3c6935de100f948f814f6a9
 2017-06-26 13:57:49 +00:00
drh
170ad68a40 Change the name of the OP_Seek opcode into OP_DeferredSeek for better 
clarity of function.  No functional code changes.

FossilOrigin-Name: ab33d299c7dab52703d06f3441c8a98c6c809b2612ec65d71aab2919bd2b1540
 2017-06-02 15:44:22 +00:00
drh
2ab792e4c0 Change sqlite3BtreeNext() and sqlite3BtreePrevious() so that they return 
SQLITE_DONE if they have already reached the end (or beginning) of the table.
This gives a performance increase and size reduction.

FossilOrigin-Name: e972a3860892022d57b26ec44ce0fbadc61c1ff54b7a10b7e82390db88d323a7
 2017-05-30 18:34:07 +00:00
drh
3f1e9e00e6 When flattening a query, make sure iTable attribute of TK_IF_NULL_ROW 
operators (that result from a prior flattening of a LEFT JOIN) are updated
correctly.  Fix for ticket [cad1ab4cb7b0fc344].

FossilOrigin-Name: 92c178507df553e4f1110342c8f9b11b3ee37989e1d634fcaccabf657befa22f
 2017-05-23 01:21:07 +00:00
drh
e46515b53f Prevent a possible NULL pointer dereference in the OP_Found opcode that 
can follow an OOM error.  Problem found by OSS-Fuzz.

FossilOrigin-Name: c2de178fe7e2e4e0d764e7e6ac637cfc8c053580c43f7246318dafad2974de3c
 2017-05-19 22:51:00 +00:00
drh
3f4df4c6f3 Reuse the same materialization of a view when that view appears in a query 
more than once, such as in a self-join.

FossilOrigin-Name: 9e35c89dbe744312f612e507b51ff9a5bb656def75392d25bc19fc638548cd1e
 2017-05-02 17:54:19 +00:00
drh
e08e8d6b61 Initial implementation of an optimization that attempts to reuse the same 
materialization of a view on a self-join of the view.

FossilOrigin-Name: 478c34b9a8b5127d13024e10307aa832f160b89720c46424dd17555bd36f590d
 2017-05-01 15:15:41 +00:00
drh
bb6783b86f Improvements to opcode documentation in the bytecode engine. 
No changes to code.

FossilOrigin-Name: e54c9f8db5b2fa8ea82c6eab7482255431af16901f7992c9667b56a0e50a9f4f
 2017-04-29 18:02:49 +00:00
drh
bff6fe1f40 Improved optimizations of views as the right operand of a LEFT JOIN. 
FossilOrigin-Name: 41c27bc0ff1d3135cdb6273ede4595f5bb0c0e1e1d470ea1633cb525674cf431
 2017-04-18 11:20:19 +00:00
drh
cfcca02765 Defer checking for null in the comparison operators, since that is an 
uncommon case.

FossilOrigin-Name: 5684525613961fed9db6a4d10dbe25521201b24f08e011df3a20ac895316957d
 2017-04-17 23:23:17 +00:00
drh
e2bc6552fe Do not allow a Mem object to be both NULL and some other type at the same time. 
FossilOrigin-Name: e698db1956bb3aba32cd3ec633ec20f5d19b1a10bc68d3772903bca3c87ee158
 2017-04-17 20:50:34 +00:00
drh
31d6fd5507 Add the TK_IF_NULL_ROW opcode to deal with non-NULL result columns in the 
result set of a view or subquery on the RHS of a LEFT JOIN that gets flattened.

FossilOrigin-Name: 3a5860d86fadcf924316707918bf283d26c53b1473e5e67f5cff59d18c2a7742
 2017-04-14 19:03:10 +00:00
dan
a34adaf667 Expand on the comment above OP_Destroy to explain why it throws an error if 
there are any active reader VMs.

FossilOrigin-Name: b9a8c2b9bec9f537b2d5aff6659a5748b1f70b53519a1f9dfceb5209154eca8e
 2017-04-08 14:11:47 +00:00
drh
dbd6a7dc06 Split off sqlite3DbFreeNN() from sqlite3DbFree() and use it in cases where 
we know that the argument to be freed is never NULL.

FossilOrigin-Name: ad90e8bb5e47945607c8fb47b6ade8cfc52a9b684805cc40132629be0ecc14cc
 2017-04-05 12:39:49 +00:00
drh
1cc3a36d90 Fix typos in the documentation for OP_Column. 
FossilOrigin-Name: 777b43e64ffb2fb80ba7b705c129c133bf9787993a66cde1759dc070b324b4b4
 2017-04-03 13:17:31 +00:00
drh
8e633b3ba9 Remove an unnecessary setting of the Mem.enc field for the output of the 
OP_Record opcode, for a performance improvement and size reduction.

FossilOrigin-Name: e6e36b288fdf21b7ff7f0bf85d2225b6505f54367b183c302c93c34a4a40b8b5
 2017-04-01 20:44:26 +00:00
drh
662c50e067 Minor performance enhancements to the OP_Affinity opcode. 
FossilOrigin-Name: c45cd3b947c0f03a688f827fddb4629a986788f0dd98d5ef899f11e68ff1c202
 2017-04-01 20:14:01 +00:00
drh
18333efd51 Previous check-in was not correct. This is a better fix for the OP_Once 
problem of ticket [06796225f59c057cd120f1].

FossilOrigin-Name: 8194dd2814b0b3f8cffbcb16306f55aabf1c1508b9d27fa806f92f0e6ecd7631
 2017-03-24 18:38:41 +00:00
drh
ab087d4e67 Fix the OP_Once opcode so that it works correctly for recursive triggers. 
Ticket [06796225f59c057cd120f1].

FossilOrigin-Name: 2556014514f36808e6d18b25722eae0daeeb8fbb5d18af13a9698ea6c6db1679
 2017-03-24 17:59:56 +00:00
drh
7adbcffcb9 Ensure that a "--" prefix is added to sqlite3_trace_v2() output for nested 
SQL statements.

FossilOrigin-Name: 673a7b67c4828acaea3baebea500ef1f8ae763588b0d9c9f2ad6ed5ceb3cfee2
 2017-03-20 15:29:28 +00:00
dan
1f9144ed41 Fix a buffer overread in debugging routine sqlite3VdbeMemPrettyPrint(). 
Problem discovered by OSS-Fuzz.

FossilOrigin-Name: f336fba7d7d41b91a5000d01dddf785821fa79ea31dbd8d1f769d55f7e871896
 2017-03-17 13:59:06 +00:00
drh
85c2dc0ae6 Fix an uninitialized variable reference in the text generator 
for "PRAGMA vdbe_trace=ON" output.
Problem discovered by OSS-Fuzz.

FossilOrigin-Name: e3d487162d1596ce125644f754ed9531ef4412f31f6837c3e31b7542b90602fe
 2017-03-16 13:30:58 +00:00
drh
bce0414844 Do a single OP_Expire at the very end of "PRAGMA optimize", and omit the 
OP_Expire on ANALYZE commands invoked by the pragma.

FossilOrigin-Name: 188300a337c87b7ee0dd1f4b9a4f1bd80e70cca4
 2017-02-23 00:58:36 +00:00
drh
114ce7a4b1 Merge integrity_check and other improvements from trunk. 
FossilOrigin-Name: fe073905081b421405ca425ca03c5b8b0ff5f2c8
 2017-02-22 19:49:54 +00:00
drh
66accfc56b Cleanup and simplification of the output row count limit control of 
PRAGMA integrity_check.

FossilOrigin-Name: 5af7d72ed9ec758283d78ceb46627d72021c1c60
 2017-02-22 18:04:42 +00:00
drh
e324782254 Very small enhancement to dispatch speed for SQL functions. 
FossilOrigin-Name: 3c3228ed16ed8a72630bd56bb9192ee3c7f82093
 2017-02-21 15:27:22 +00:00
drh
4a54bb5794 Add the OP_SqlExec opcode and use it to implement "PRAGMA analyze_as_needed", 
invoking ANALYZE subcommands as necessary.  This simplifies the implementation.

FossilOrigin-Name: d386015f5e7ecdd951d70db56b7bbd858be7ad90
 2017-02-18 15:58:52 +00:00
drh
5e98e838da The analyze_as_needed pragma now responds to table size growth and will 
automatically rerun the analysis after each 10x size increase.

FossilOrigin-Name: bfbdd07409688fac4ccddbab3639745f6152e23d
 2017-02-17 19:24:06 +00:00
drh
d879e3eb8d Change all legacy instances of "#if SQLITE_DEBUG" to "#ifdef SQLITE_DEBUG" for 
consistency.

FossilOrigin-Name: 670f10b24230863688270d12ac519609ade2302b
 2017-02-13 13:35:55 +00:00
mistachkin
5f7b95f73b Backout the change in [02f6293f27] as it causes MSVC to complain. 
FossilOrigin-Name: aaae74d06f4865818465cfdb440258ae8a5b985a
 2017-02-01 23:03:54 +00:00
dan
f62154d4ac Changes so that the pre-update hook and the sessions module work with WITHOUT 
ROWID tables.

FossilOrigin-Name: 964bdc27f8f1b1db2e5c0c2a65c8156614cbe087
 2017-02-01 14:10:24 +00:00
drh
0caad09585 Remove a C99-style comment. Fixes to the kvtest-speed.sh script. 
FossilOrigin-Name: 91eb6b628e278d20eccc647293e5b30765163e12
 2017-01-31 16:49:01 +00:00
drh
d59bcbdee7 Remove another unnecessary local variable initialization from sqlite3VdbeExec() 
FossilOrigin-Name: 2361b03b61311aab9b9ec9de040bbb73be31be0d
 2017-01-31 16:43:36 +00:00
drh
78a9e92ecf Remove an unnecessary initialization of the pOp variable in sqlite3VdbeExec(). 
FossilOrigin-Name: 02f6293f278f7b0a0f4876f5c6a0f4dc42620d79
 2017-01-31 16:34:51 +00:00
drh
1379521f4a Fix a typo in a comment. 
FossilOrigin-Name: bd22bf9cbe028e9811ca3afaadafd90312cb0fc9
 2017-01-31 15:27:04 +00:00
dan
cb9a364390 Experimental change to invoke the preupdate hook when WITHOUT ROWID tables are 
written.

FossilOrigin-Name: 856f8604c59c8fdd9bfb7d86fc0e212f091ab49a
 2017-01-30 19:44:53 +00:00
drh
b7dab70a92 Improvement to the OP_Permutation opcode to prevent it from using CPU cycles 
for initialization in prepared statements that do not use that opcode.

FossilOrigin-Name: b4a98f65564a0d9fba2fef95ebd00a39b3e1e572
 2017-01-26 18:00:00 +00:00
drh
fae58d51ce Remove the obsolete lastRowid cache from the sqlite3VdbeExec() for a size 
reduction and performance improvement.

FossilOrigin-Name: b4803184652e5f4f823c1521412bc480baeb3dbf
 2017-01-26 17:26:44 +00:00
drh
d447dced96 Trim NULL values off the end of records when the SQLITE_ENABLE_TRIM_NULLS 
compile-time option is used.  Increase the size of the P5 operand to 16 bits.
Fix a problem with short records in the sessions extension.

FossilOrigin-Name: 4801bd59a01dcc11a3eb9e776e7599b36f162d2a
 2017-01-25 20:55:11 +00:00
drh
585ce1923c Experimental enhancement to automatically trim NULL values from the end of 
records, for a reduced disk footprint.  This change also involves increasing
the P5 operand from 8 to 16 bits.

FossilOrigin-Name: 118ded403b95050b74ae2b03919c43d614094a32
 2017-01-25 14:58:27 +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