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22,778 Commits 1,607 Branches 185 Tags
197561cd42258dcaf2f9d1eb94b5c0438c4e4f3f
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1200 Commits

Author SHA1 Message Date
drh
1be266ba08 Remove the ExprSpan object. Instead, keep track of the test of subphrases in 
the parse using the "scanpt" non-terminal.

FossilOrigin-Name: 3eab7bdc44e0878b83dc86f27058a40c2ffafeacadc566f03693f6dc7e40a504
 2017-12-24 00:18:47 +00:00
drh
2fc865c115 Add an experimental location(X) SQL function that attempt to return the 
location of the payload within the database for the record that contains
column X.  location(X) returns NULL if X is not an ordinary table column or
if SQLite cannot figure out the location because it is using a covering index.

FossilOrigin-Name: 51be9558164301c5dd4df23ab8b3e67de0b522f8d36f79f3d84d45d3dc2a83a4
 2017-12-16 20:20:37 +00:00
drh
7fc0ba0f4c Clarification of comments on sqlite3FindInIndex(). No changes to code. 
FossilOrigin-Name: 071cabd23cd010180711a138f891a0e358031dd128532def4f62c5764651bace
 2017-11-17 15:02:00 +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
drh
fca23557fe Reactivate query flattening when the result set of the outer query has 
no function calls or subqueries.  This is a partial reversal of 
check-in [c9104b59].  Co-routines are still preferred if the outer
query has a complex result set, but for simple results sets, query flattening
is used.  Check-in [4464f40ccd7] is completely backed
out due to this change.

FossilOrigin-Name: d17ef7d153058f7332b3fec421ade42c67e26b06f36fc1629e6799537a5afc5f
 2017-10-28 20:51:54 +00:00
dan
21cd29ab15 Avoid passing a NULL value as the second argument to memcpy(). 
FossilOrigin-Name: 58e5bb491bc0e28412ca188ba8fbe94adc67b5b1e9d7c112c36011400528d577
 2017-10-23 16:03:54 +00:00
drh
508e2d00f3 Fix unreachable conditionals and revise a testcase that was made obsolete by 
the changes on this branch.

FossilOrigin-Name: 71f0adf7ca6824c3aba69104b9976dbb71b377474529e1a36220b4804293501e
 2017-09-30 01:25:04 +00:00
drh
70efa84da7 Add new routines to simplify dealing with collating sequences in expressions: 
sqlite3ExprNNCollSeq() and sqlite3ExprCollSeqMatch().

FossilOrigin-Name: 490e488ea963fe725b16212822c8608f2b6abce688931b611446bc2cbfe6b87c
 2017-09-28 01:58:23 +00:00
drh
84d4f1a328 Improved resolution of large integer values in "CAST(x AS NUMERIC)". 
FossilOrigin-Name: 7f2bd4ff45fba29528c18cac6da983bd9b164303525d3965056f5b40f85dc83f
 2017-09-20 10:47:10 +00:00
drh
97258194a2 Do not make the assumption (as check-in [4da49a95c0f07] incorrectly did) that 
the ExprList returned by sqlite3ExprListDup() would never be passed into
sqlite3ExprListAppend().  Include a new test case that shows this sometimes
does happen.

FossilOrigin-Name: 29227d00a9999f0f28a0b55ef70183799a667c3b9d81d2e5ac0ab1840bef98b1
 2017-09-17 19:45:28 +00:00
drh
3df6c3b1c5 Improved the header-comment documentation on sqlite3ExprCodeExprList(). 
No changes to code.

FossilOrigin-Name: 5dc3ecb5f67968545fb35ceed61ad625e069c4e744c5c3ebaea65e2fee347a5f
 2017-09-15 15:38:01 +00:00
drh
a19543fe70 Optimization to the ExprList object to make it slightly smaller and faster. 
FossilOrigin-Name: 4da49a95c0f07ed7790169e8833c3e2dacda504a3d997f567572020148abe30b
 2017-09-15 15:17:48 +00:00
drh
7e6f980bd4 Proposed fix for ticket [b899b6042f97f5] 
FossilOrigin-Name: c7f9f47b239fdd99b555fb0a31eb82b22dbe6c821f1612d67a0d6a822288d9f7
 2017-09-04 00:33:04 +00:00
drh
b40f06c62d Remove an unnecessary conditional. 
FossilOrigin-Name: 56d19f9fd7b01d4ed5c3e7309977b43fedffee168c9760d3e3b7e885790f781e
 2017-08-21 02:20:57 +00:00
drh
4dd89d5a24 Sometimes a TK_COLUMN Expr node can have Expr.pTab==0 if it is a reference 
to an expression column in an index on and expression.  Fix for ticket
[aa98619ad08ddcab].

FossilOrigin-Name: d0da791ba0edfb65186459345e43500d8364a086a5a1651d828fecc1a1dd1edb
 2017-08-14 14:53:24 +00:00
drh
6e97f8ec84 Combine the Parse.ckBase and Parse.iSelfTab fields into just Parse.iSelfTab. 
This fixes a problem with date/time functions in check-constraints.  Add
some test cases for date/time functions in index expressions and check
constraints.

FossilOrigin-Name: 22eda0985ecd1f456c073e6ad735a8417f3ff1fb6aaad1640e1cec01e50c51d8
 2017-07-20 13:17:08 +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
3963e584b4 Fix a register allocation problem in PRAGMA integrity_check that caused 
the same register to be used for two different purposes on the first
ATTACHed database if the schema for the ATTACHed database was noticable
more complex than the schema for the first database.
Fix for ticket [a4e06e75a9ab61a1].

FossilOrigin-Name: 253945d480b052bfe311888022b5eb0be91c8c80cda05036e58207d57520262c
 2017-07-15 20:33:19 +00:00
drh
d10866798d Exploit the fact that Expr.pRight and Expr.x are never used at the same time 
for a small performance gain.

FossilOrigin-Name: aacbb9a461fdb34c7f9c8ce348e44c3e96c93334f210d438d92bfac1794dc686
 2017-07-07 13:59:34 +00:00
drh
b98a2e351e More aggressive use of EP_Leaf on expression nodes, to help prune searches. 
FossilOrigin-Name: c1a1d68c8219c8072e60af5c46a30849ae9a04fa1a6b2a8b22b82fec069d691d
 2017-07-07 12:43:57 +00:00
drh
5aa307e2a6 Fix the exprCompareVariable() routine so that it works for non-UTF8 text. 
FossilOrigin-Name: 25acd9658be792d686b3ebfaa8c3692f9830e043538ed0afecf97110a07758a4
 2017-06-29 01:23:12 +00:00
drh
c080422642 Alternative implementation of exprCompareVariable(). Need to run tests on 
both this branch and the original to see which one to go with.

FossilOrigin-Name: b959c6297c151150ea2dca24aa1f68f3bd76dd6620eb6c03f8dfa59fdd5c13b2
 2017-06-28 21:47:16 +00:00
dan
5aa550cf3b Consider the values bound to SQL variables when determining whether or not a 
partial index may be used.

FossilOrigin-Name: 7b59c353b805c64689b4ae9df347705acbb5f116346ad77af8ce087da7893747
 2017-06-24 18:10:29 +00:00
drh
a8b9793c86 Avoid unnecessary memory zeroing during expression list allocation. 
FossilOrigin-Name: de28e6514a42438411e2c9d833ba660108128ca86d0b90f32925fb73195f4862
 2017-05-31 02:58:30 +00:00
drh
979dd1be57 Optimizations to the Walker object and its methods to make the code a little 
smaller and to help it run a little faster.

FossilOrigin-Name: 6854a34ed708259f2280f7ee56cec09f7fc99810dc739dc2814ddeae286aa2c4
 2017-05-29 14:26:07 +00:00
drh
f43ce0b445 The TK_IF_NULL_ROW expression node must be treated as a variable that 
references the table Expr.iTable.
Proposed fix for ticket [7fde638e94287d2c].

FossilOrigin-Name: 77fc23013cebc7797985864b91d78db5d0e2469511732044ebfaf02b891c979a
 2017-05-25 00:08:48 +00:00
drh
dd1bb43ab5 Fix the build so that it works again with SQLITE_OMIT_SUBQUERY. 
FossilOrigin-Name: bb0d9281588b8cc24bf2f1f10d0c56277004226adaa2ce5037782503b283b45d
 2017-05-15 15:12:24 +00:00
drh
ffe280596e Fix an obscure assertion fault that can follow an OOM. The problem 
was introduced by check-in [a1cf44763277b6c7].

FossilOrigin-Name: 04e7e5650efffdce759b46999beb67c250af6cf394a7779ab861f210a84c134d
 2017-05-06 18:09:36 +00:00
drh
ab314001b8 Additional comments on the sqlite3ExprIsConstantOrGroupBy() routine. No 
code changes.

FossilOrigin-Name: 8424492eac506866d2918e5fe03c8f65fef960215d56012a3b52ed42789ed35a
 2017-05-02 16:46:41 +00:00
dan
ab31a8450b Automatically transfer terms from the HAVING clause to the WHERE clause of an 
aggregate query in cases where the result of evaluating the term depends only
one one or more of the GROUP BY expressions (and on no other inputs).

FossilOrigin-Name: 5375a3ce56f1d993b13b469fe33ec7679948f53940f62a15ddbaeb8aaa26a22c
 2017-04-29 20:53:09 +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
mistachkin
b1ed717f18 Make USE_FULLWARN=1 the default for MSVC and fix harmless compiler warnings. 
FossilOrigin-Name: 6bf673767b8e5cedef1acff795cbe524fab8db2525c06424db4e038934a33936
 2017-04-14 14:50:34 +00:00
dan
b8d29c2f75 Fix a segfault that could occur if an indexed expression was used in a 
comparison operation within the result-set of a SELECT statement.

FossilOrigin-Name: d6bb7c42ff6309ce168ccdcf03b4cdabfccfc9e2a911d254ac7dc4fea4aa2bc1
 2017-04-11 11:52:25 +00:00
drh
aca19e19a8 Proof of concept for the ability to use the expression columns in an index 
on expressions in place of equivalent expressions in the result set or in
the WHERE clause.  This check-in compiles but is mostly untested.

FossilOrigin-Name: a52ef2ad7c0e14b78b801f16a1f6ea8d8fa9ae5d7d810e18dd24c600b662a312
 2017-04-07 19:41:31 +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
ac48b751e2 Save a few bytes and a few CPU cycles in sqlite3ExprListDelete() routine. 
FossilOrigin-Name: 9e6c939144a129b36bb119120442a4a021e00187783da211315d4bb13acd7c3a
 2017-04-05 11:57:56 +00:00
drh
f4dd26c5a0 Remove a conditional made unreachable by the previous ExprList enhancement. 
FossilOrigin-Name: a1cf44763277b6c745b5b5509ca9129b6c3231608b4d1c8aec2815b64b5a2a07
 2017-04-05 11:49:06 +00:00
drh
43606175e2 Combine the ExprList_item objects and the ExprList wrapper into a single 
memory allocation, for improved performance and reduced footprint.

FossilOrigin-Name: 2b6560ad88b92820c383bcdc1e30c06f8b081ef7c6d9b1af71d2bb76c83e35cd
 2017-04-05 11:32:13 +00:00
drh
ba28b5ab0a Fix a possible NULL pointer dereference in following an OOM error 
in sqlite3ExprIsInteger(). Problem found by OSS-Fuzz.

FossilOrigin-Name: 5ec655e8e817c1ed3bfb2e576745a7cef441494ad7baf1bf9f8895e98ac19c5a
 2017-03-12 20:28:44 +00:00
drh
1ed1e616f7 Remove an obsolete assert() in the IN operator code generation. 
FossilOrigin-Name: 18bf6aca2ac86478fd12d5020f3a41cfd2bd2dc3defe2298411f79ad308a6f73
 2017-03-12 19:39:00 +00:00
drh
5c258dc1cc Change two MallocZero() calls into MallocRaw() to avoid unnecessary memset(). 
FossilOrigin-Name: ff5e733cbffd73faa4046e0f1c7f24bb6e131738
 2017-02-16 17:18:07 +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
drh
f9463dfbcf Fix indexes on expressions so that they can be actually used with 
a COLLATE clause.

FossilOrigin-Name: e464b919f76520b45bb58983c6702db59d820ee4
 2017-02-11 14:59:58 +00:00
drh
13ac46eea2 Ensure that indexed expressions with collating sequences are handled 
correctly.  Proposed fix for ticket [eb703ba7b50c1a5].

FossilOrigin-Name: 9689d04b8250139e32078b2aa9748edcc6231bcd
 2017-02-11 13:51:23 +00:00
dan
a7466205ca Modify the sqlite3SelectDup() routine to avoid recursing on Select.pPrior. 
FossilOrigin-Name: a7674ead5be986c66f7d61d598adc7e5728bcd30
 2017-02-03 14:44:52 +00:00
drh
8e74e7ba4c Further minor enhancement and size reduction in 
sqlite3ExprAssignVarNumber().

FossilOrigin-Name: eacfdcf25796ea29b5e63499c3d7397498305ad9
 2017-01-31 12:41:48 +00:00
drh
18814dfb7e Performance optimization in sqlite3ExprAssignVarNumber(). 
FossilOrigin-Name: 5987ca1ff94ed3c1666f783bb15b16158aa7e1db
 2017-01-31 03:52:34 +00:00
drh
49c5ab243b Factor constant functions out of the inner loop since they are more expensive 
than the extra OP_Copy needed to move the result into place.

FossilOrigin-Name: 80ad317f89c46db0d0d252aefdc036a34a61183d
 2017-01-04 04:18:00 +00:00
drh
ad879ffdb5 Clean up the implementation of constant function factorization. 
FossilOrigin-Name: 2ab997e47998d261bd6190bbce5c09f3fbd4cfd3
 2017-01-04 04:10:02 +00:00
drh
1e9b53f9bc Attempt to factor out constant functions from the interior of table scans, 
since functions can often be expensive to compute.

FossilOrigin-Name: 62e9270a8057d758621da33adb27fad14225f95d
 2017-01-04 01:07:24 +00:00