44918c74cd
Fix cases where code in expr.c was failing to handle OOM failures that occurred while processing sub-select expressions.
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FossilOrigin-Name: 62efe2eee34fdb147cc456290576d8fc3801487867c78aadd4485f85468d9ffc
2021-04-17 14:42:37 +00:00
cd0b245934
Avoid an assert() failure when a compound scalar sub-select is, due to a "WHERE (sub-select) AND (... OR ...)" clause, coded twice by the code generator.
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FossilOrigin-Name: a4e3f13329332f91a250bc18459fd4100990a1ac0516f8a0a6b21ff117db9795
2021-04-12 12:02:49 +00:00
bfd6f1bcd5
Fix a use-after-free error that could occur when processing "SELECT aggregate(DISTINCT <expr>)..." queries.
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FossilOrigin-Name: 0e4789860b81c31d3a6d1f9f8340042ce1d08a82bf6119c783fcab85180b1b63
2021-04-08 20:29:12 +00:00
4ad9673d00
Do not allow the use of rowid for views and subqueries unless compiled
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with -DSQLITE_ALLOW_ROWID_IN_VIEW.
FossilOrigin-Name: a2ddb89b206c13876d34c5f9e3db41cda72d6eb3fea31ffa8cc6daa1e1580e16
2021-04-07 18:17:53 +00:00
6e5020e8da
Also prohibit the use of rowid from a subquery. Add the
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SQLITE_ALLOW_ROWID_IN_VIEW compile-time option to restore legacy behavior
in case somebody actually needs it.
FossilOrigin-Name: 14b1d56ef84b0e62b7f9c4e5f7f985ca10e770c8db59f54004ad892c2a2dcbfb
2021-04-07 15:45:01 +00:00
252d582a35
Unnecessary local variable initialization to fix a harmless compiler warning.
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FossilOrigin-Name: c22e47c77a35ebcd1fdfc0caea9119dd5e24e76d5fdd0f2ffbb58205a7242297
2021-04-07 13:20:34 +00:00
f330d53ff3
Fix a crash in handling queries of the form "SELECT aggregate(DISTINCT tbl.col) FROM ... LEFT JOIN tbl ...". Fixes a problem introduced by [ef4ac0ddd297bbd3].
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FossilOrigin-Name: 0dcf808ddf23da834da724d88b1715ed06565f1f1290713ff42a3fcf6ffb802e
2021-04-03 19:23:59 +00:00
126aab142e
Remove old testcases() macros. Also remove surplus end-of-line whitespace.
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FossilOrigin-Name: 54b41915ed8ef993b4116b2de00f3f4bba7570a1d28ad6bb93ba158a6b89eff3
2021-03-24 23:30:06 +00:00
9be1339faf
Comment improvements to on the distinct-agg optimization. Show a line in
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the EQP output when using an ephemeral table to implement DISTINCT on an
aggregate.
FossilOrigin-Name: 037ca79e6032ca962b4f6182187bc12a7d91170d73630c8cd6fb191d2c183ee4
2021-03-24 19:44:01 +00:00
6db1c9da67
Improvements to distinct aggregates such that they can sometimes avoid
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using an ephermeral table to test for duplicates if the column that is
distinct is part of an index.
FossilOrigin-Name: ef4ac0ddd297bbd38351410c5a387e1628561b3f1bec9e4c2c9d76fbe29f955a
2021-03-24 17:28:11 +00:00
8210233c7b
Revise tests cases to align with the new EXPLAIN QUERY PLAN output.
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FossilOrigin-Name: 50fbd532602d2c316813046ed6be8be2991c281eb5f295c4c28520a0de73862c
2021-03-20 15:11:29 +00:00
d218decec5
Merge enhancements from trunk.
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2021-03-19 19:09:24 +00:00
d685dd6be6
Correlated CTEs should not generate a materialization subroutine. If they
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need to be materialized, each use case must be materialized separately.
dbsqlfuzz 01b8355086998f0a452cb31208e80b9d29ca739a.
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2021-03-19 13:53:34 +00:00
a979993b25
Improved labeling of EXPLAIN QUERY PLAN output. Many test failures due to
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the different output format.
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2021-03-19 13:00:28 +00:00
080fe6dec9
Add a NEVER() on a branch that was made unreachable by the
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"circular reference" fix.
FossilOrigin-Name: 114d9780aecdd9f03f235fc1f2ab81ef89cb00b3bafa61cff612e939595ff5f0
2021-03-18 20:04:46 +00:00
ca237a8b7b
Fix a problem causing spurious "<cte>: circular reference" errors to be reported when there is actually a different error in the SQL statement.
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FossilOrigin-Name: 9981223618782bf867dfc8988d0c634a42f569228880c5c5e00aa4ae762cfff2
2021-03-18 18:25:43 +00:00
51ddfef74d
If there are already 500 or more simple SELECTs in a query, do not add more by flattening UNION ALL sub-queries into parent join queries.
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FossilOrigin-Name: 9520bed2bd87dc56543ee58123323d293e960ecd84707b77f15f41669a2c9c3d
2021-03-17 14:29:37 +00:00
b19a581241
Fix a memory leak in the new code on this branch.
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FossilOrigin-Name: 0817cf2ec08fdefd3c1d41790df7b5d6d490767757b44bb0229694023c8e40fc
2021-03-13 18:23:30 +00:00
7607580791
Fix a crash in new code on this branch.
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FossilOrigin-Name: c05ed2a8a9c4975c69bdfa733598ed90c1509d52b3c39dedbd829ab148777e1d
2021-03-12 21:09:20 +00:00
051170c453
Merge latest trunk changes into this branch.
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FossilOrigin-Name: 198bc510d64b5794559584ad5c9de41dc966dce4eb78be15b12adba43dfcb639
2021-03-12 18:33:55 +00:00
5383db714e
Attempt to use an index for DISTINCT aggregate queries that have GROUP BY clauses.
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FossilOrigin-Name: 3bca003cd2b2cb38d4a4e2e5f673ee0ac05bfe31247ec09e7bd379b77a31b44c
2021-03-12 18:24:31 +00:00
6d0053cfa7
Extra comments and testcase() macros associated with the new
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sqlite3ParserAddCleanup() mechanism. No changes to release builds.
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2021-03-09 19:32:37 +00:00
96ecb7b004
Add missing comment to new routine in select.c.
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FossilOrigin-Name: ef2f0cf21ba61bdd29e09cf41b012a2d757683f524a252f0af7dfee7df1a1a0f
2021-03-09 16:47:33 +00:00
4fcb30b7d7
Experimental optimization for distinct aggregates (e.g. "SELECT count(DISTINCT <expr) FROM ...").
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FossilOrigin-Name: eb919611fd2f255e4ad1fe7db633363793169f6cf99c650eaefa48c022eb5d22
2021-03-09 16:06:25 +00:00
70149ba47e
Modify the SQLITE_DBCONFIG_ENABLE_VIEW option so that it always permits
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TEMP views, just as SQLITE_DBCONFIG_ENABLE_TRIGGER always permits TEMP
triggers.
FossilOrigin-Name: 83dab8b358b6832a221a58e74dd5e99b9cdea4eee65124bb6799881e867d989c
2021-03-05 18:33:01 +00:00
bc7819d176
Fix the processing of implied LIMIT clauses when flattening a compound
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query.
FossilOrigin-Name: 90c6b9fcb0e15e2552fe5be53f8201f145bb535cc37b603d488eadf33438412b
2021-03-05 14:08:45 +00:00
5f0922b96c
Remove a branch made unreachable by check-in [e893f88750ea64d4].
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FossilOrigin-Name: 20d7dc120dc964a0236da719e4de22bff5110b95da396e2ac6790e9f6b667899
2021-03-04 16:32:28 +00:00
aae0f74e64
Earlier detection of a misplaced ORDER BY or LIMIT clause in a compound
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SELECT. This prevents problems in recursive CTEs with multiple recursive
terms in which there is an ORDER BY or LIMIT clause on the last non-recursive
term.
FossilOrigin-Name: e893f88750ea64d45922429e022c585748974016404f2a2b7952f5a227865246
2021-03-04 16:03:32 +00:00
50f9f6c649
Fix a crash that could occur if a sub-select inside an EXISTS expression features an ORDER BY clause containing one or more window functions.
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FossilOrigin-Name: 9768e7db624fbfe688d61ac06bffca14a169d439d8f65f5a14529af5660d3d2e
2021-03-04 14:18:22 +00:00
fad1ad0526
Fix a harmless assertion fault resulting from [6e6b3729e0549de0] that was
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discovered by dbsqlfuzz. Enhance .selecttrace output to show omitted
ORDER BY clauses. New dbsqlfuzz test cases added.
FossilOrigin-Name: 27a0388ad616f80e8dcc986c247a5c23a8565dae9081b04ff85bac0d357e531b
2021-03-03 14:07:52 +00:00
8ddf686267
Attempt to optimize "x IS NULL" and "x IS NOT NULL" expressions when x is a column with a NOT NULL constraint.
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FossilOrigin-Name: 5ecd842555009ce27ee6390325ac5c2504143474b12b730933f0833b3dad788a
2021-02-26 20:14:32 +00:00
903fdd4834
Allow WHERE terms to be pushed down into sub-queries that contain window functions, provided that the WHERE term is made up of entirely of constants and copies of expressions found in the PARTITION BY clauses of all window functions in the sub-query.
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FossilOrigin-Name: dac51f303bba1a0aac7768c688b0c134deb7641062cce2071d546f2d8f241dec
2021-02-22 20:56:13 +00:00
17267fe393
Fix inverted logic regarding the materialization hint on the push-down
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optimization.
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2021-02-22 11:07:25 +00:00
745912efac
Add the AS MATERIALIZED and AS NOT MATERIALIZED syntax that works like it
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does in PostgreSQL.
FossilOrigin-Name: a6bb272ec0c758ab069bfc07443624e0ea7910b1f23224ee078d050fa3ccf068
2021-02-22 03:04:25 +00:00
a79e2a2d28
Materialize any CTE that is used more than once.
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FossilOrigin-Name: ba59159fbe6b83fb6d79fbfee22d983768b0ebbaac7e99d2ac66c810e5e04100
2021-02-21 23:44:14 +00:00
7601294ad3
Rename the "struct SrcList_item" object to the more succinct "SrcItem".
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This is a symbolic change only. The logic is unmodified.
FossilOrigin-Name: bfd5bf2c73110fcb36db9ba2a949ff516131fbd3e89325f88fe9f5c2b4ed87b2
2021-02-21 21:04:54 +00:00
5abe1d3d53
Simplified resolution of CTE names. Slightly faster and about 100 bytes
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of code smaller.
FossilOrigin-Name: 0d2c992f3622a6272ca4a3caff6b21f619fe976b8df8b34eff066086f8df2202
2021-02-21 01:19:42 +00:00
1862271f7c
Performance improvement in resolving the INDEXED BY index name for the common
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case where there is no INDEXED BY clause.
FossilOrigin-Name: 554b286ac208168bde91c6c6034cc7087410def76fce650b519661b2ee2c61b7
2021-02-20 21:20:54 +00:00
a7da40f377
Merge changes from trunk into the alter-table-drop-column branch.
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FossilOrigin-Name: 9ea640073f8809dfe2612ae1ea384a938b433f884c54d9e5aa3712de79397ac1
2021-02-18 22:47:34 +00:00
6f6e60ddb1
Improvement to the INSERT optimization of check-in [16ac213c57196361] so
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that it works with SQLITE_ENABLE_HIDDEN_COLUMN but is also easier to maintain
and a little faster as well.
FossilOrigin-Name: f985a78ecc0c6d9ff671c730a109d97dc781b06e47a0ab03f441cea5d021a4c3
2021-02-18 15:45:34 +00:00
c54246ffdf
Use the sqlite3ParserAddCleanup() mechanism to ensure that the AggInfo
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structure associated with an aggregate query is deallocated, for a performance
increase and size reduction.
FossilOrigin-Name: 7a1399671fa10c64d5358cc4d364d24c643fe9dd8da923356462267ee7962f61
2021-02-17 21:13:14 +00:00
c16592cd1b
Merge trunk changes into this branch.
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FossilOrigin-Name: 0cd5e2f9ce181f2c940ffca6fe69fda84f452613e66463d0d7c7413fc11b9772
2021-02-17 20:19:13 +00:00
6e6d9833cc
Add experimental implementation of ALTER TABLE DROP COLUMN. Only some cases work so far.
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FossilOrigin-Name: f0217937d7306fb595727e61e871e8b03d8c881d339a0865bfd0117d90d42e4e
2021-02-16 20:43:36 +00:00
13162ef975
New SELECTTRACE macros more clearly deliniate when the query planner is
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invoked in the middle of PRAGMA vdbe_addoptrace output.
FossilOrigin-Name: 7c03ce49b74f72b63dd75c3a02625e671bfd771f71b24e808994322b00d97677
2021-02-16 20:01:08 +00:00
8794c68a35
Avoid manifesting a CTE (or other view) multiple times when it is possible to
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reuse the first manifestation.
FossilOrigin-Name: 9692f510803c9b9725abb687d7c10fbc0d5ed784479ec6f3fcc55925a87fe16d
2021-02-13 16:39:24 +00:00
e8f1490f55
Fix a problem in the unreleased union-all flattening code.
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FossilOrigin-Name: e4f8a79fd8b3be9bf8add5f5e1c66bc2fe78da4e50ea500ab0b8370d30e31ba5
2021-02-13 14:26:25 +00:00
af7b76534b
Expand the number of optimization-disable bits from 16 to 32. Use one of
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the new bits to disable the min/max optimization, so that we can more easily
verify that we get the same answer both with and within that optimization.
FossilOrigin-Name: fd0c9a123b58b7b134ed67f26dbb4196b61e56227f078422cc7e9a3497054c2d
2021-01-13 19:28:17 +00:00
d193057ad1
Further enhancements to the min/max optimization of
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[/info/b8ba2f17f938c035|check-in b8ba2f17f938c035] to fix the performance
regression identified by
[forum:/forumpost/623f571482|forum post 623f571482].
FossilOrigin-Name: 188772a1dbaf066fbddd39c718fdd87478b19a920622f4640bcb79d4ef065331
2021-01-13 15:23:17 +00:00
b9366f8e32
In the .selecttrace output, show the ORDER BY clause added by the Min/Max
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optimization.
FossilOrigin-Name: db0ecfe66433f8915b6eb16d3735a4a0d0f8e0bbc395bc9c1364387506fc4657
2021-01-13 11:44:51 +00:00
21d4f5b53a
Fix a potential use-after-free following an OOM in sqlite3ParserAddCleanup()
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and add a mechanism to detect situations where this might occur in the
future.
FossilOrigin-Name: 38ef8ab9830e12acd2c710e113939b1f8dced02612c6933c37a3c948a4030d0a
2021-01-12 15:30:01 +00:00
dan