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ccf6e7d0f0cbcd829b13c482aa43c27a59ea335c
Commit Graph

1096 Commits

Author SHA1 Message Date
drh
f932f7145e Fix a problem with a stale Select.pWith pointer when a CTE is used together 
with a compound query and an ORDER BY clause.

FossilOrigin-Name: 9a453f52a2b30595891604ede7d4acf61c2736a1
 2015-04-12 17:35:27 +00:00
dan
b33c50f215 Fix a problem with resolving ORDER BY clauses that feature COLLATE clauses attached to compound SELECT statements. 
FossilOrigin-Name: 427b50fba7362e5b447e79d39050f25ed2ef10af
 2015-04-04 16:43:16 +00:00
drh
8f9d0b2b25 Correctly detect the error of having a "*" wildcard on a SELECT without 
a FROM clause on the left-hand side of a recursive CTE.

FossilOrigin-Name: b11d1793a06a44931edcbf12a615b49794d53a62
 2015-03-21 03:18:22 +00:00
drh
16897072b5 Refactor some jump opcodes in the VDBE. Add JumpZeroIncr and DecrJumpZero. 
Fix the LIKE optimization to work with DESC sort order.

FossilOrigin-Name: 26cb5145bf52f8c3fffa8c69b6c24aee4d974883
 2015-03-07 00:57:37 +00:00
drh
2308ed3854 Propagate the COLLATE operator upward through function calls. 
Initial fix for ticket [ca0d20b6cdddec5e8].

FossilOrigin-Name: c053448a55f9d030e8ffe88cf4fc14ada7f6ec19
 2015-02-09 16:09:34 +00:00
drh
885a5b030e Disable the query flattener for aggregate subqueries if the parent query 
uses other subqueries in its result set or WHERE clause or ORDER BY clause.
Preliminary fix for ticket [2f7170d73bf9abf8].  However it still contains
a defect similar to the COLLATE problem of [ca0d20b6cddd].

FossilOrigin-Name: 0b7d65e3fda676d193347cb782854c28a48252af
 2015-02-09 15:21:36 +00:00
drh
17645f5eec In selecttrace 0x100 mode, show the parse tree after name resolution instead 
of before flattening, so that it is always seen even if flattening does not
occur.  Also: add the hex pointer value to the top of each SELECT tree.

FossilOrigin-Name: aa093fef2d2a7e26d987b46654963e4d7e66d444
 2015-02-09 13:42:59 +00:00
drh
0e86a1ac08 In selecttrace mode 0x100, show a complete parse-tree both before and after 
query flattening.  This is a change to debugging code only.

FossilOrigin-Name: b3c6b8a3c1075d2a87cef68f061d6a0098e6d8d0
 2015-02-09 11:54:41 +00:00
drh
2b8c5a0039 Make sure errors in the FROM clause of a SELECT cause analysis to abort 
and unwind the stack before those errors have a chance to mischief
in the "*" column-name wildcard expander. Fix for ticket [32b63d542433ca67].

FossilOrigin-Name: 9e6eae660a02303fd140dac5fbff82364f4120cd
 2015-01-22 12:00:17 +00:00
drh
fe201effbe Fix another instance of an incorrect value for KeyInfo.nXField on a 
sorting index.  Ticket [f97c4637102a3ae72b79].

FossilOrigin-Name: 0077f64510f9b9ce90032df2696cb242d097ab84
 2015-01-20 03:04:29 +00:00
drh
3f39bcf5bc Make sure that the KeyInfo.nXField value of ephermeral tables used for 
ORDER BY and GROUP BY is set correctly, so that the correct comparison
function can be choosen by sqlite3VdbeFindCompare().

FossilOrigin-Name: c16bae5e699b851f4ca8414c5dfa5370b18f69f0
 2015-01-19 20:59:34 +00:00
drh
3afd2b4d6d Avoid O(N*N) behavior with very long lists of VALUES. 
FossilOrigin-Name: ee30fb35217f3429ee89aaad7c19f29710420e4c
 2015-01-05 20:04:51 +00:00
drh
45f54a5778 Handle compound-select statements originating from VALUES clauses as a 
special case that does not use recursion.

FossilOrigin-Name: 9ce9e43af38e6bc362734463d4bfc40ff0c98f8f
 2015-01-05 19:16:42 +00:00
drh
b87fbed5a3 Remove some needless recursion from compound SELECT processing. 
FossilOrigin-Name: fe677d13f03e24fa667efc0c2e7f5bbb99521791
 2015-01-05 15:48:45 +00:00
drh
dea7d70d1b Make sure that a DISTINCT query with an ORDER BY works correctly even if 
it uses a descending index.  Fix for ticket [c5ea805691bfc4204b1cb9e].

FossilOrigin-Name: 0d3aef97ebddf422b8bdcbc5878970c6129e3f54
 2014-12-04 21:54:58 +00:00
drh
6cf4a7dfa6 Remove the OPFLAG_CLEARCACHE flag from OP_Column. In its place, change the 
P3 parameter of OP_SorterData to be the index of the pseudo-table cursor whose
record header cache is to be cleared.  This gives a small size reduction
and performance increase.

FossilOrigin-Name: 20062f49428a2349a2dd705af570c60b499a3eef
 2014-10-13 13:00:58 +00:00
drh
b08cd3f345 Improvements to the new syntax-tree output routines: Omit the "END SELECT" 
mark and instead terminate the graph at the last item.  Increase the maximum
tree depth to 100.

FossilOrigin-Name: 5ce05757aac80b99c3b2141cd301809f8e28e661
 2014-09-30 19:04:41 +00:00
drh
c90713d3d2 Show tree diagrams of data structures in the debugging output when the 0x100 
bit is set on sqlite3WhereTrace or sqlite3SelectTrace.

FossilOrigin-Name: 92e0b4bd4d75e8b000586e51a07b3e181d9af20b
 2014-09-30 13:46:49 +00:00
drh
4fa4a54f7e Remove the SQLITE_ENABLE_TREE_EXPLAIN compile-time option. Add alternative 
debugging display routines: sqlite3TreeViewExpr(), sqlite3TreeViewExprList(),
and sqlite3TreeViewSelect().

FossilOrigin-Name: 4ff51325d6b41d0c59e303b573700ec80c51d216
 2014-09-30 12:33:33 +00:00
drh
eb9b884c2d Improved ".selecttrace" output. 
FossilOrigin-Name: c0b61f7092a7fd2c5f51db26ce7a7a5c75c227fe
 2014-09-21 00:27:26 +00:00
dan
7c0a4720ca Candidate fix for [d11a6e908f]. 
FossilOrigin-Name: 89398880bcfff96e91d2a9c45774f5fb3209ffc1
 2014-09-20 20:38:48 +00:00
drh
9300adbc79 Fix the SELECTTRACE_ENABLE macro so that it doesn't cause problems for 
testfixture.  Add new SELECTTRACE() calls.

FossilOrigin-Name: f1ba68f131d2f03e4a7bc50cde23a7609d384279
 2014-09-20 20:24:49 +00:00
drh
abd4c72357 Enable SELECT query planning tracing when compiled with 
SQLITE_ENABLE_SELECTTRACE and either SQLITE_DEBUG or SQLITE_TEST.

FossilOrigin-Name: cbe0cf9ddf46f0a678c85d49bfa74e3b7712e1a1
 2014-09-20 18:18:33 +00:00
drh
9588ad95c1 Do not flatten aggregate subqueries that contain min() or max() functions 
so that if the min()/max() are discarded by the outer query, they still
function and cause non-aggregate expression to be evaluated on the minimal
or maximal row.

FossilOrigin-Name: 0bdf1a086b3946722f4d4b328e25917f61c14713
 2014-09-15 14:46:02 +00:00
drh
6092d2bcfe Adjust comments to show that subquery flattening restriction (10) was 
removed from the code back in 2005.  This is a comment change only.

FossilOrigin-Name: 4ff0eb96bc364baed2d8005c69291ca9240b99dd
 2014-09-15 11:14:50 +00:00
drh
236241aeb0 Simplify the way the column cache is managed around OP_Move instructions. 
FossilOrigin-Name: 320556233e19cdd9d590a09655c3465754700d39
 2014-09-12 17:41:30 +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
503ae86508 Merge recent performance enhancements from trunk onto the threads branch. 
FossilOrigin-Name: 35c44a3c73e2e8b14ff194c41986f4bdb9dfe737
 2014-08-29 14:40:07 +00:00
drh
53932ce8fa Avoid an unnecessary OP_Move operation for expression subqueries. 
FossilOrigin-Name: 462f42af52f146fd328ddcbbe78c8444ef7bd2c3
 2014-08-29 12:29:39 +00:00
drh
83b25d32d7 Merge the pre-3.8.6 changes into the threads branch. 
FossilOrigin-Name: a608fd1d52606a009c3acc7f1d184b86a7df3c82
 2014-08-14 14:02:48 +00:00
drh
fcf2a7757e Fix an assert() statement in the SELECT code generator that was 
incorrect following an OOM error.

FossilOrigin-Name: a179e41e40dba4c19a488985f77777acd27b689d
 2014-08-12 01:23:07 +00:00
drh
da2e5862d1 Merge all recent changes from trunk. 
FossilOrigin-Name: a353a8515fb2eff86042d0c33e39772f4d04e0b3
 2014-08-06 02:03:35 +00:00
drh
4336b0e64a Improved VdbeCoverage() macros. A few minor simplifications to generated 
VDBE code.

FossilOrigin-Name: 01f60027ad1841051fa493a646141445f8971357
 2014-08-05 00:53:51 +00:00
drh
d0dc5d4984 Avoid closing a pseudo-table associated with sorting in a co-routine since 
that pseudo-table might be used again in an outer loop.

FossilOrigin-Name: 6d81805298ea882f5fee99504d5a95f1a762a90b
 2014-06-03 14:42:34 +00:00
drh
ff14013496 Merge changes from the trunk into the threads branch. 
FossilOrigin-Name: 416cb091267de91b9cadee9f7453b8627570b7d3
 2014-05-29 20:24:20 +00:00
drh
48dd1d8e28 Change the name of the Index.autoIndex field to Index.idxType and provide 
symbolic names for the various values of that field rather than using
magic numbers.

FossilOrigin-Name: d16e575dacc811de0f7b58a0d1cd243678dce6c5
 2014-05-27 18:18:58 +00:00
drh
79045882c9 Merge recent trunk changes into the threads branch. 
FossilOrigin-Name: 8215202759dbd863edf20aa26ff21da20bc35d73
 2014-05-26 20:15:21 +00:00
dan
e96f2df3dd Changes to the output of EXPLAIN QUERY PLAN to make it clearer when a query uses the PRIMARY KEY index of a WITHOUT ROWID table. 
FossilOrigin-Name: 9268df305b90ac11e44b3107bbab5becf38860b7
 2014-05-23 17:17:06 +00:00
drh
fb0d6e56d6 Merge latest trunk enhancements and fixes into the orderby-planning branch. 
FossilOrigin-Name: 84862d3a095629d20c8e7b8a16f4dc26cd41ab6d
 2014-05-02 13:09:06 +00:00
dan
3852413246 Fix an obscure problem to do with temp register allocation that could occur if more than one simple SELECT within a compound SELECT uses a partial sort. 
FossilOrigin-Name: 427409ae106cdab7892a6b50fe30c5f52de5addc
 2014-05-01 20:26:48 +00:00
dan
cfc9df76e1 Store values loaded from the stat1 table as logarithmic values in memory. 
FossilOrigin-Name: 1bd74c49ddab6f53bb6eaa57907eff44c2580dd6
 2014-04-25 15:01:01 +00:00
drh
0ff435a782 Reopen the orderby-planning branch and merge in the latest trunk enhancements 
and fixes.

FossilOrigin-Name: 6077ddcd93318e24b9756adaaf293ba9fb3cedf7
 2014-04-24 15:06:25 +00:00
dan
374cd78c1d Avoid discarding an ORDER BY clause in the case where an identical GROUP BY clauses uses an index to group, but not sort, the rows. Fix for [b75a9ca6b0]. 
FossilOrigin-Name: de9a490f594183f337a2ec9e0f87792eac83548b
 2014-04-21 13:21:56 +00:00
dan
78d5843245 Remove the sequence values from sorter records used by ORDER BY as well. 
FossilOrigin-Name: c3ae3697832a00d4d5758988a8766bdbb691e6b8
 2014-03-25 15:04:07 +00:00
dan
dd23c6bfb4 Omit the sequence value from sorter records used by GROUP BY queries that cannot use an index. 
FossilOrigin-Name: 3f90abddc31ac20739778c235a834c33f7057997
 2014-03-24 20:19:07 +00:00
drh
fd0a2f9756 Avoid unnecessary moving of content between registers during an ORDER BY. 
FossilOrigin-Name: 4f472accf072d9cb64f209923924b26f21b13d27
 2014-03-24 18:08:15 +00:00
dan
3f802ebce2 Remove an unnecessary temporary register allocation. 
FossilOrigin-Name: 5d506743f541b022cde04a9606baa4680cdfd70b
 2014-03-24 09:34:58 +00:00
drh
83553eefaf Remove a pointless OP_Once operation in ORDER BY clauses with LIMIT. 
FossilOrigin-Name: e6c59d23316c83b318b1a94d9b28a5d321737fa5
 2014-03-24 02:20:53 +00:00
drh
70f624c3a9 Further enhancements to geneverated VDBE code for ORDER BY. 
FossilOrigin-Name: e7188fad87ec82d36a39b80ccaf8006bf45a9bcd
 2014-03-24 01:43:50 +00:00
drh
d345a66428 merge fixes from trunk 
FossilOrigin-Name: faf7f9caf526ab33a6fdb9c89b45a0483510db21
 2014-03-23 18:47:00 +00:00