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43c4ac8bfecba96e4db6d075c5fa743a4fe25ea5
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229 Commits

Author SHA1 Message Date
dan
3739f29807 Fix a problem in the sessions module with logging sqlite_stat1 rows for which 
(idx IS NULL) is true.

FossilOrigin-Name: 25bf734be1b3883fccf12ac4d93d50289aa307fb60a52e0e32df12f7ee4edc7a
 2018-01-17 20:57:20 +00:00
dan
614efe2b4b Experimental change to include changes made to the sqlite_stat1 table in 
changesets generated by the sessions module. sqlite_stat1 entries in such
changesets are ignored by legacy clients.

FossilOrigin-Name: bd46c4429693545eb16db85692fc591ac529796aa746f5f21df1ce4380619320
 2018-01-12 16:44:29 +00:00
drh
49297c86d2 Fix an incorrect assert in the ANALYZE logic for STAT4 on WITHOUT ROWID 
tables.

FossilOrigin-Name: ad741976c8c29bcc94f9ea9ed7deb580bb00c8a81d1a7fba1a4e03849728433d
 2017-03-21 18:56:52 +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
dan
24d772cc27 Move a branch condition in analyze.c inside an #ifdef SQLITE_ENABLE_STAT4 block. 
FossilOrigin-Name: d6afd98de3ee8b714dfd6477ead955096f623972
 2017-02-22 19:41:16 +00:00
dan
bd1d270ec9 Improve the performance of ANALYZE when SQLITE_ENABLE_STAT4 is defined. 
FossilOrigin-Name: 737a82444065752785c643b1d29ca097c828effb
 2017-02-22 19:27:51 +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
dfe11bae99 Fix errors in the table resize detection. 
FossilOrigin-Name: 4229caec0b60a1617b9d5ff94b47271cbd7be1e0
 2017-02-18 02:42:54 +00:00
drh
182e84c116 In the analyze_as_needed pragma, avoid running unnecessary OP_LoadAnalysis 
and OP_Expire opcodes.  Make the analyze_as_needed pragma responsive to the
schema name.

FossilOrigin-Name: 882599a4a7ea92c9e7752e0745475508e58a11c3
 2017-02-18 02:19:02 +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
72052a73a3 Add the "PRAGMA analyze_as_needed" command. 
FossilOrigin-Name: e93db2373127d31d33ec46ef918fa9386bb664a6
 2017-02-17 16:26:34 +00:00
drh
33bec3f5e8 Enhance the Index and Table objects so that they remember if their stats come 
from the sqlite_stat1 table.  Make the "PRAGMA stats" an SQLITE_DEBUG only
pragma.  Add the flags column to "PRAGMA stats".  These are all preliminary
steps toward a "PRAGMA analyze_ifneeded;" feature.

FossilOrigin-Name: 85026c8ee143bbd46565660fff8346ef81421546
 2017-02-17 13:38:15 +00:00
drh
35497fccbe Improved comments on the statGet() implementation in ANALYZE. No changes 
to code.

FossilOrigin-Name: 9663eea2a16bb4eec71476d307a3722a768308c3
 2017-02-01 01:34:15 +00:00
drh
785d8ed0d4 In the STAT4 computations, ensure that the aAvgEq values do not go negative. 
FossilOrigin-Name: f58f75b5a06f88ba97bd1a02bee621c64691c6f8
 2017-01-11 14:15:29 +00:00
dan
895decf6b5 Avoid passing NULL pointers to memcmp() or memcpy(), even when the 
"number-of-bytes" argument is passed 0.

FossilOrigin-Name: 56ff72ab44288296efc99a608f7edc4346366a50
 2016-12-30 14:15:56 +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
51b55a3ee6 Fix harmless compiler warnings. 
FossilOrigin-Name: 0213d6af84965676626c2fb4d78b4c74675207cc
 2016-04-04 12:38:05 +00:00
drh
f6661a8896 When reading an sqlite_stat1 table with missing entries for some indexes, 
set the default for the missing indexes after all other indexes are set
so that the default values are more in line with indexes that are actually
in the stat1 table.

FossilOrigin-Name: a62340dc0507e36f6dec05b1fda68d8399ec62ec
 2016-04-01 12:35:22 +00:00
drh
32c49904a6 Add the SQLITE_NOMEM_BKPT macro to enhance the ability to debug OOM errors. 
Only effective with compiling with SQLITE_DEBUG.

FossilOrigin-Name: 9b3454762d142113f5923d754ca6bd2edefbd362
 2016-02-15 18:15:15 +00:00
drh
80738d9c3e Improvements to the application-defined function mechanism so that it is 
more compact and runs faster, especially when the application defines
thousands of new SQL functions.

FossilOrigin-Name: 3201fbcc5105d23132e6b8b7ac825e66af4f8a39
 2016-02-15 00:34:16 +00:00
mistachkin
fad3039c51 Enhance ability to debug out-of-memory errors. 
FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28
 2016-02-13 23:43:46 +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
4a642b6060 Improvements to the way that OOM errors are processed. 
FossilOrigin-Name: c3ef03478a5788c855b3aef385d43ae7f494f440
 2016-02-05 01:55:27 +00:00
drh
9b34abee30 Use sqlite3VdbeAddOp4() rather than a separate sqlite3VdbeChangeP4() call, for 
a slightly smaller and faster binary.

FossilOrigin-Name: a4258cd4613c55acacb5c7b61faa3de7eb0759d2
 2016-01-16 15:12:35 +00:00
drh
2d80151f32 Combine the xFunc and xStep pointers of the FuncDef object into a single 
pointer xSFunc.

FossilOrigin-Name: 0d1b3d7d3ca66cb0b97493f1aeade1703af3c9f4
 2016-01-14 22:19:58 +00:00
drh
8b4a94adc1 Add the sqlite3_strlike() interface, which might be useful for implementing 
LIKE operators on virtual tables.

FossilOrigin-Name: e70ec71d6883f2f8fc75301ff985bccb5aa06127
 2015-11-24 21:23:59 +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
drh
1f9ca2c84c Add code to maintain indexes with expression arguments across DELETE, INSERT, 
and UPDATE statements.  Legacy tests pass, but the new code paths are still
largely untested.  The query planner currently makes no effort to use
expression indexes.

FossilOrigin-Name: efaabdb71626bdc03768e87e186c72f6f3da75b2
 2015-08-25 16:57:52 +00:00
drh
9c7c913cd6 Cache the sqlite3_context structure in the P4 operand of VDBE programs 
for faster SQL function dispatch.

FossilOrigin-Name: 2abc44eb3b9d489321baa50bc25e17dafbda3687
 2015-06-26 18:16:52 +00:00
dan
4eed05347c Fix a memory leak caused by duplicate entries in the sqlite_stat1 table. 
FossilOrigin-Name: 2f58c8c9722fffc486610f9e6b08178d53a56b64
 2015-04-20 15:13:08 +00:00
drh
4081d5da3b Add logic to releasetest.tcl that detects -fsanitize=undefined errors. 
Fix a few false-positivies that come up when running the sanitize=undefined
test.

FossilOrigin-Name: 2835e79a0afec6e4d449ac9340afec068c2d4c11
 2015-01-01 23:02:01 +00:00
dan
5cca94ea71 Fix a buffer overread that might occur in analyze.c if SQLITE_ENABLE_STAT4 was defined. 
FossilOrigin-Name: c1ae1268b9023a771fda98f26bf451c6066fe70b
 2014-12-05 21:04:26 +00:00
drh
0da10d3289 Always reinitialized the Index.bUnordered and Index.noSkipscan flags before 
rereading the sqlite_stat1 table, even if SQLITE_ENABLE_STAT4 is defined.

FossilOrigin-Name: 1e1221fc4823a6bb6fc5d2408732e27aca585de9
 2014-11-22 21:37:00 +00:00
drh
664f85dd59 Add an ALWAYS on an always-true branch in wal.c. 
Fix the ANALYZE command so that it resets the "unordered" and "noskipscan"
flags on indices when reloading the sqlite_stat1 table.

FossilOrigin-Name: 9ed97a85feee6593faefa2b54cc4cf9a60f515f9
 2014-11-19 14:05:41 +00:00
drh
f9df2fbdcd Adding the "noskipscan" token to an sqlite_stat1.stat field prevents an 
index for being used with the skip-scan algorithm.

FossilOrigin-Name: 00fe09505792cd0d104b2da9d040f023e30fa871
 2014-11-15 19:08:13 +00:00
drh
d7d7147022 Change the 0x800 bit of SQLITE_TESTCTRL_OPTIMIZATIONS so that it disables 
the loading of STAT3 and STAT4 content, not just the using of that content.
Change the internal name of that bit to SQLITE_Stat34.

FossilOrigin-Name: ca3b00c44ec52d209642a5ba9ef82e085fac39db
 2014-10-22 19:57:16 +00:00
drh
9f07cf7b2e Take steps to avoid misestimating range query costs based on STAT4 data 
due to the roundoff error of converting from integers to LogEst and back
to integers.

FossilOrigin-Name: 3c933bf95f291f7957580d823dce92c981375a5c
 2014-10-22 15:27:05 +00:00
drh
85d117bc56 Remove unreachable branches in decodeIntArray() when compiling without 
STAT3 or STAT4.

FossilOrigin-Name: 80e1baa5c225c78902e08dbea9d577ff5757847f
 2014-10-06 18:33:49 +00:00
drh
75b170b164 Avoid leaking Index.aiRowEst memory if an OOM causes a rollback which deletes 
the index before the aiRowEst deletion code in sqlite3AnalysisLoad() routine
has a chance to run.  Since the aiRowEst now might be deleted from freeIndex()
which does not always have a db pointer, make sure the aiRowEst memory is
not held in lookaside.

FossilOrigin-Name: efd87ba142723ba131fcc985db6eb45c5a3c637b
 2014-10-04 00:07:44 +00:00
dan
0c1a18b294 Fix a division-by-zero error that might occur if the sqlite_stat1 table is corrupt. 
FossilOrigin-Name: f9c053b23ece877a7fdbe82204a10592f2d24a2d
 2014-10-03 19:29:39 +00:00
dan
43085d7425 Improve the accuracy of the estimates used when searching an index for values not present in any stat4 samples under some circumstances. 
FossilOrigin-Name: e6f7f97dbc677c9f01b23142928c3fa7307c2fba
 2014-10-03 19:16:53 +00:00
drh
4583c37ca0 Fix the affinity on inserts into the ANALYZE tables. Change the affinity 
characters to be upper case, to make the P5 parameter of comparison operators
easier to read.

FossilOrigin-Name: 3f3ca76aea38d566a574f4403b375bdac32854ed
 2014-09-19 20:13:25 +00:00
peter.d.reid
60ec914c74 Fix typos in comments. No code changes. 
FossilOrigin-Name: e62aab5e9290503869e1f4d5e0fefd2b4dee0a69
 2014-09-06 16:39:46 +00:00
drh
f8ede57a61 Update comments in the ANALYZE command that describe how the Stat4Accum 
objecct is passed around within the VDBE.  No changes to functional code.

FossilOrigin-Name: 9779c7a9eb1e2bd36e9286331a9314f064014d80
 2014-09-01 23:06:44 +00:00
drh
975e076681 Avoid a confusing (though correct) argument to the sqlite3_result_blob() 
function in the implementation of ANALYZE.

FossilOrigin-Name: 4cae93f8ae8fb3fe38fd5dc7d3a5ea0d11552841
 2014-09-01 22:34:54 +00:00
drh
5f1d1d9c87 Refactoring: Change "pIndex->onError!=OE_None" to use a macro: 
"IsUniqueIndex(pIndex)".  Easier to understand that way.

FossilOrigin-Name: e75b26ee357bb3d3c1a539b05d633ebf314726d7
 2014-07-31 22:59:04 +00:00
drh
f8c7e053ed Improve the performance of the ANALYZE command by taking advantage of 
UNIQUE constraints on indices.

FossilOrigin-Name: 114dcf33670fd98a1ebbac0e44f66b2d8bcccddf
 2014-07-24 23:23:26 +00:00