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099b385d17d424ab6fba5ed46e9735dc4b04f79b
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1188 Commits

Author SHA1 Message Date
drh
099b385d17 Do not confuse the constant SQLITE_MAX_ATTACHED with the maximum number of 
schemas.  Add the new SQLITE_MAX_DB constant for the maximum number of
schemas.  [forum:/forumpost/a006d86f72|Forum post a006d86f72].

FossilOrigin-Name: 7b65fb9f7bd616f834633afd64b3448bf9ca2b6e4cc6d6c01e75d1d877c88a79
 2021-03-10 16:35:37 +00:00
drh
a79e2a2d28 Materialize any CTE that is used more than once. 
FossilOrigin-Name: ba59159fbe6b83fb6d79fbfee22d983768b0ebbaac7e99d2ac66c810e5e04100
 2021-02-21 23:44:14 +00:00
drh
7601294ad3 Rename the "struct SrcList_item" object to the more succinct "SrcItem". 
This is a symbolic change only.  The logic is unmodified.

FossilOrigin-Name: bfd5bf2c73110fcb36db9ba2a949ff516131fbd3e89325f88fe9f5c2b4ed87b2
 2021-02-21 21:04:54 +00:00
drh
9ffa258a01 Improved handling of vector equalities in the EXISTS-to-IN translator. 
FossilOrigin-Name: ef49ee4a3766146963bfb6b013472f9836afb9c5b0d21a8533871cf961139e38
 2021-01-16 20:22:11 +00:00
drh
235667a858 Use NEVER and ALWAYS macros to confirm that the return value from 
sqlite3ExprSkipCollateAndLikely() is never NULL in some of its use cases.

FossilOrigin-Name: 76d2eb86e109fc3cbdba2e8175c22ed7660b59bb9315f6c55c565587f33ad43b
 2020-11-08 20:44:30 +00:00
drh
9bb612f2c8 Fix a faulty assert() statement. Add new test cases. 
FossilOrigin-Name: 80ecdb3da4558bb08ee3ec6edbde906ad5b3b8182e672b5ba0d5dfa8041cee0a
 2020-10-02 12:42:51 +00:00
dan
6c3b4b07d1 Fix a crash that could occur in SQLITE_MAX_EXPR_DEPTH=0 builds when processing SQL containing syntax errors. 
FossilOrigin-Name: 5f58dd3a19605b6f49b4364fa29892502eff35f12a7693a8694100e1844711ea
 2020-08-20 16:25:26 +00:00
drh
46fe138d98 Do not skip over TK_IF_NULL_ROW operators when bypassing TK_COLLATE operators. 
Fix to check-in [ac31edd3eeafcef4] which was itself a fix for ticket
[45f4bf4eb4ffd788].

FossilOrigin-Name: 871f2ddcfbb9196dbd851a350e3471ee6d242d86bbd755201f7e2406fce3ac55
 2020-08-19 23:32:06 +00:00
drh
08b9208660 Fix harmless compiler warnings that surface in newer versions of GCC. 
FossilOrigin-Name: 9d670a318381f219b467653f5f9539097808b887ae37291ce13be462dedfb18d
 2020-08-10 14:18:00 +00:00
drh
5b107654e9 Readd the ALWAYS() macro that was removed by [f7a74f89dbd58b47] as the 
condition is no longer reachable due to the previous check-in.

FossilOrigin-Name: 9cb03beae42d814a1b1b69f72865fde502d3f443313ec29edd010d1de40225eb
 2020-07-13 15:35:08 +00:00
drh
6af305de1e Remove unnecessary code from the window functions implementation. 
FossilOrigin-Name: 1e87da9c93309d1d69b1e0ab65c615b9ff9c1c6813ad0c7b90d2495be4ba0adc
 2020-07-10 21:43:53 +00:00
drh
d8d335d737 Fix a possible null pointer deref following OOM. Discovered by dbsqlfuzz. 
FossilOrigin-Name: cc888878ea8d5bc754c69de523819d32d6d9853857e31d7287f9dbfd723428db
 2020-06-26 04:34:28 +00:00
drh
1e32bed3c1 Further refactoring of the schema table name. 
FossilOrigin-Name: 9536fa0ae0c1ae6e2e98d2fa11e5acda7f3c9b8ca5061b6f7f8cae63a11d936b
 2020-06-19 13:33:53 +00:00
drh
74e0d96695 Identifiers "TRUE" and "FALSE" cannot take on their boolean constant values if 
they are operands of the "." operator.

FossilOrigin-Name: ad738286e2441b5e84d05366db3fcafabe66be766f21fe6c17f43a8fabab16fb
 2020-06-13 03:18:21 +00:00
drh
bc050b8f27 Mark an always-true conditional with ALWAYS(). 
FossilOrigin-Name: 35a236841764a10cdcda63f34e1a8e7ffa43933bc89cb32f675454327834d7bf
 2020-06-09 22:11:06 +00:00
dan
ed41a96bc1 Ensure that aggregate functions that (a) are part of SELECT statements with no FROM clause and (b) have one or more scalar sub-selects as arguments are assigned to the correct aggregate context. 
FossilOrigin-Name: 16a41fa8c4c74bba4e908a9c19e6cf5a927cac140e2070c9abf303158be7257b
 2020-06-09 17:45:48 +00:00
drh
81185a5138 Give the expression pointer fields of AggInfo distinctive names in order to 
simplify tracking of all their uses.

FossilOrigin-Name: a53bdd311c4154fd5e1131efbb9665362f79db5a35ce9f7b1547f74b8ee2d8ba
 2020-06-09 13:38:12 +00:00
drh
2f82acc036 Fix minor OOM problems. 
FossilOrigin-Name: 8b23d80271aab38abe42ee8b3ca4b746572ecef26c2a37b094b01560e6be9d45
 2020-06-07 22:44:23 +00:00
drh
bf7909734a AggInfo objects might be referenced even after the sqlite3Select() function 
that created them has exited.  So AggInfo cannot be a stack variable.  And it
must not be freed until the Parse object is destroyed.

FossilOrigin-Name: 3c840b4df306e2db1da08673e9ede973b4cb6d2b3f9eeeab5835e39452ee3056
 2020-06-07 20:18:07 +00:00
drh
896366282d Alternative fix to ticket [c8d3b9f0a750a529]: Prior to deleting or modifying 
an Expr not that is referenced by an AggInfo, modify the AggInfo to get its
own copy of the original Expr.

FossilOrigin-Name: 7682d8a768fbccfe0cc956e9f6481637146e1ab9763b248ff11052761ce32e32
 2020-06-07 17:33:18 +00:00
drh
b639a2094a Small performance improvement and size reduction in the expression 
code generator.

FossilOrigin-Name: eeb53e219551d8a05a87f1de9a7cd9af295d08a296f1f435a8509ea1252ccdcc
 2020-05-27 12:44:28 +00:00
drh
399062cccb Change a datatype from i16 to int to appease Converity and help eliminate 
a false-positive.

FossilOrigin-Name: 5b560ec49041d89c87ea3315d8fc17f7fb0e03a82091934be7373b290183f82e
 2020-05-27 00:02:07 +00:00
drh
bdd4f7d91c Innocuous changes to help Coverity avoid false-positives. 
FossilOrigin-Name: 4ec8a5a203f10d228d0b3389120638766cc343179dbe38d5dbf69b650765934c
 2020-05-26 10:54:46 +00:00
drh
0934d64045 Defensive code that tries to prevent a recurrence of problems like the 
one described in ticket [7a5279a25c57adf1]

FossilOrigin-Name: 572105de1d44bca4f18c99d373458889163611384eebbc9659474874ee1701f4
 2020-05-25 15:19:52 +00:00
drh
e40cc16b47 Move some utility Walker callbacks into the walker.c source file, as they 
seem to belong there better.

FossilOrigin-Name: dac438236f7c5419d4e7e094e8b3f19f83cd3b1a18bc8acb14aee90d4514fa3c
 2020-05-24 03:01:36 +00:00
drh
3c0e606bba Implement the IIF(x,y,z) SQL function that is short-hand for 
"CASE WHEN x THEN y ELSE z END".  For compatibility with SQL Server.

FossilOrigin-Name: fce173cd211b15867369b6a54fad48168352fc83981a722ce98e57299b88608a
 2020-05-13 18:03:34 +00:00
drh
9e5fdc41c1 Release some restrictions on columns added by ALTER TABLE so that they 
only apply if the table contains one or more rows.

FossilOrigin-Name: 3a16c0ce4d8851f79f670d94786032c8007619154ece44647dc9cc5b1f9654ff
 2020-05-08 19:02:21 +00:00
dan
07f9e8f4f3 Ensure affinity is not discarded from a view column if the view appears on the rhs of a LEFT JOIN. Fix for [45f4bf4e]. 
FossilOrigin-Name: ac31edd3eeafcef46164a4506bbc32c711bb7cd78378aeaa4c9bb12524ac5ea1
 2020-04-25 15:01:53 +00:00
drh
2d99f95721 The ALTER TABLE fix of check-in [7e5ad8e0ab7ee91a] is no longer needed due 
to the changes at check-in [4cf8721f5ceb1fda].  But, we keep the defense
in place as an assert() for extra safety.

FossilOrigin-Name: 230556e859536bbadf0daf8133a9a01ef4f03148b3296723e37bad66e3fc3d82
 2020-04-07 01:18:23 +00:00
drh
b3120fdf5b Remove dead code that was added during initial development of RENAME COLUMN 
but never actually served a purpose.

FossilOrigin-Name: c95c4cda4640f05d61b13b4e60494dec07d4483734fc41ffcce73fb5163cbb0d
 2020-04-07 00:54:09 +00:00
dan
85f2c76cf9 When running ALTER TABLE, avoid adding some internally generated tokens to the token map to improve performance on schemas with nested views. 
FossilOrigin-Name: 4cf8721f5ceb1fdaefdc355b3211f75c53c4cdf9d2582ca70fc96777a9b057c2
 2020-04-06 16:37:05 +00:00
dan
c59b4acf5d Avoid factoring out constant expressions on the LHS of an IN(...) operator, as the IN(...) operation may affect the affinity of these values. 
FossilOrigin-Name: 98d56b4a34fddcbaecd953a045ae0270b4d78c1edf34cc73522fb4e12743af80
 2020-04-03 19:37:14 +00:00
drh
95b395901a Reinstate the optimization that converts "x IN (y)" into "x==y". 
FossilOrigin-Name: 27936e6884e77093533719c7955a17f051cfb359872e51a6d1481152e6256443
 2020-03-26 00:29:50 +00:00
drh
9b258c54e4 Rename sqlite3ExprCodeAtInit() to sqlite3ExprCodeRunJustOnce(). 
Other changes to make the new code cleaner.  Test cases added.

FossilOrigin-Name: d7f18489978fdbbe3ab317485518cac91a75416ccef55898301afdd76d3b415b
 2020-03-11 19:41:49 +00:00
drh
38dfbdae8a Do not factor out constant functions into the initialization section at the 
end of the prepared statement, be cause if they throw an exception, it will
abort the statement even if the function is never called.  Better to put
constant functions in an OP_Once block.

FossilOrigin-Name: 97a18a5cd701848a9660385e31bffe2c397e3cfe57ccdb876f44d08c00d1d39a
 2020-03-11 17:58:27 +00:00
drh
8d5cea6b61 This variant to the fix for ticket [e0c2ad1aa8a9c691] uses fewer CPU cycles. 
FossilOrigin-Name: fb5a8a9edd0a4f979d6c30278d4ddc73c651f56ae989b4e5983fca36887c5ceb
 2020-03-11 02:04:15 +00:00
drh
e7375bfa72 Enhanced detection logic for preventing the use of static schema expressions 
by code generating routines.

FossilOrigin-Name: 5f60b527b938c0778e8f725c635ce0dc5ed7a4e01fd6252aa2cdb64da2f625bc
 2020-03-10 19:24:38 +00:00
drh
24e399038b Make a copy of the expression that defines a value of a generated column 
before sending it to the code generator routines.

FossilOrigin-Name: 03d201c041c17579e791c73fe6babd60b9f892a84ffd1470851f8eb2857d3990
 2020-03-10 13:35:04 +00:00
drh
0c76e892d9 Apply the correct affinity transformations when pulling values off of the 
sorter index used for GROUP BY.  Ticket [e0c2ad1aa8a9c691]

FossilOrigin-Name: 101f7dea75a203f1f3aa422a607ef701eb0901ba4d5e8d1075cd350454a61956
 2020-03-10 11:50:43 +00:00
drh
088489e8d9 The sqlite3ExprCodeFactorable() routine should make a copy of non-factorable 
expressions, as they might be coming from a DEFAULT or generated column
in a table constraint.

FossilOrigin-Name: a2d6f108c5d07559b125823a04c9cb072c80be80d7913097891a6192c7e1e225
 2020-03-10 02:57:37 +00:00
drh
78d1d225d8 A better (smaller and faster) solution to ticket [4374860b29383380]. 
FossilOrigin-Name: abc473fb8fb999005dc79a360e34f97b3b25429decf1820dd2afa5c19577753d
 2020-02-17 19:25:07 +00:00
drh
bf48ce49f7 Take care when checking the table of a TK_COLUMN expression node to see if the 
table is a virtual table to first ensure that the Expr.y.pTab pointer is not
null due to generated column optimizations.  Ticket [4374860b29383380].

FossilOrigin-Name: 9d0d4ab95dc0c56e053c2924ed322a9ea7b25439e6f74599f706905a1994e454
 2020-02-17 00:12:04 +00:00
drh
92a27f7bf2 Extend the OP_Copy-coalesce optimization fix of check-in [b36126c1889e323c] 
so that it is also correctly disabled by the CASE operator.
Ticket [9d3666754ac37d5a].

FossilOrigin-Name: 29a969d6b1709b80d9cb88b60971e4eb021f7f5f8ee9a619be74b833a78a35ef
 2020-02-04 01:41:44 +00:00
drh
bebce86cde Merge in the untrusted-schema enhancements. 
See [/doc/87aea3ab1cdda453/doc/trusted-schema.md|doc/trusted-schema.md]
for details.

FossilOrigin-Name: 5720924cb07766cd54fb042da58f4b4acf12b60029fba86a23a606ad0d0f7c68
 2020-01-09 20:44:37 +00:00
dan
fbb6e9ff48 Fix an assert() in window.c that could fail with some obscure SELECT statements that use window functions. 
FossilOrigin-Name: 83dc55679a91bf5d1d13706088ce58eed02b9aad1ad0ae237966e78e0d769663
 2020-01-09 20:11:29 +00:00
drh
014fff20ad Block edgy functions used in DEFAULT constraints. 
FossilOrigin-Name: da434dc149786e4b1cd80b3b2b25f8b614d0dec62d5439f839a66b536999e398
 2020-01-08 22:22:36 +00:00
drh
2eeca2046e Performance improvements and test cases added. Allow "PRAGMA trusted_schema=ON" 
FossilOrigin-Name: 30882ca80f6c51f6bb7b2692c1ac3f19a7c61a23aa8730be79aec0ae3ef08d54
 2020-01-08 20:37:45 +00:00
drh
0dfa5255bc Check for whether or not it is safe to use non-innocuous functions as the 
function is being coded, not when its name is resolved.

FossilOrigin-Name: 1da802d54b689a462e1fe899c6ffa08ef14d34f36728b14b055b5a76b1edc274
 2020-01-08 17:28:19 +00:00
drh
2e26a602a3 Backout change [4d0b9109f7a5312d4e1] because the conditional it added is 
no longer reachable due to check-in [1409758f72c0206c].

FossilOrigin-Name: b3f2696705cc3e7b038f156423f808432a4680ea7e313dc15e34bdf6b1845655
 2020-01-06 18:59:46 +00:00
drh
f6ea97ea3d Fix a false-positive in the register validity tracking logic by moving the 
temporary register release call before the jump that uses that temporary
register.

FossilOrigin-Name: 9da48a5ca66dc67c8f7fb2d2471dac7ea696e35ecba5ddf65747d08d452436c1
 2020-01-04 15:21:47 +00:00