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128 Commits

Author SHA1 Message Date
drh 0cdbe1aee0 Make the internal dynamic string interface available to extensions using 
the new sqlite3_str object and its associated methods.  This is mostly just
a renaming of internal objects and methods to use external names, through
there are a few small wrapper functions.

FossilOrigin-Name: 87f261f0cb800b06ad786f6df16f2c4dddd0d93dfdcc77b4a4eaa22920b56bf1
 2018-05-09 13:46:26 +00:00
drh e2188f0b0f Fix harmless compiler warnings associated with the new EXPLAIN QUERY PLAN logic. 
FossilOrigin-Name: 374d8e264487b0437a8d995ced1bc026a92d495a2d0568f65f033e9ebe11d0e2
 2018-05-07 11:37:34 +00:00
drh 5d72d9245d Make a separate limb in the EXPLAIN QUERY PLAN output for the various lines 
associated with the OR-optimization.

FossilOrigin-Name: 75ac7b4e4fd0811ca80c719badacff207e0bbd00ac64dde3b3d4ec676fad472d
 2018-05-04 00:39:43 +00:00
drh 03c3905f94 Fix a dangling-else problem that was causing recursive CTEs to malfunction. 
Begin fixing test cases to work with the new EQP output.

FossilOrigin-Name: 82ca44b82fed6814c84440ba8bfaa019488ab956e84ac165180e2fcece6facb2
 2018-05-02 14:24:34 +00:00
drh e2ca99c907 Begin reengineering the EXPLAIN QUERY PLAN function to provide more 
intuitive output.

FossilOrigin-Name: 70b48a7972dfbb44af3ccd8ccd830e984bec88d80a78b3566a5de86a16e7fc14
 2018-05-02 00:33:43 +00:00
dan 820fcd2ce9 Fix a problem with processing "LEFT JOIN tbl ON tbl.a = ? AND (tbl.b=? OR 
tbl.c=?)" in cases where there are indexes on both tbl(a, b) and tbl(a, c).

FossilOrigin-Name: ce35e39c5cc2b00dd6b4a9ffaa9d5eb7d9b862759e87d5f053729de7643eee9c
 2018-04-24 18:53:24 +00:00
drh 5776c139a4 Add a hyperlink to the ticket on the code comment for the fix to 
ticket [7fa8049685b50b5aeb0c2].

FossilOrigin-Name: 45247c7f291bc0cc42600a4aa4ff7cdcd0a703fdfadcb0e12174c5250e70d503
 2018-04-24 14:18:49 +00:00
dan 4da04f784f Do not attempt to read values from indexes-on-expressions if the index is on 
the RHS of a LEFT JOIN. This won't work if the index cursor points at a
null-row. Fix for [7fa80496].

FossilOrigin-Name: b8ef967ab1bebf2846c06c4f7200d6fa1c60e52e55711ea171c25ef1331f8a24
 2018-04-24 14:05:14 +00:00
drh 4de3353d4a Better solution to the LIKE problem from the previous check-in that works 
even if the SQLITE_LIKE_DOESNT_MATCH_BLOBS compile-time option is used.

FossilOrigin-Name: b850dd159918af568c55c00ff146ba9c9c04d33ff384fe1eb0ad74164bc401bb
 2018-04-02 00:16:36 +00:00
drh 1f0ecc79b0 Fix a logic error discovered by OSSFuzz. 
FossilOrigin-Name: fc06ddd458fc1028b33b3927cc3b113b7106caa67136993de2e57926a8a19623
 2018-03-31 23:28:55 +00:00
drh 4d1c6845ff Fix an incorrect table lookup used to find the appropriate search operator 
for a WHERE clause on a row-value inequality.  The incorrect table lookup
was causing an incorrect answer for the less-than operator.
Fix for ticket [f484b65f3d6230593c34f11]

FossilOrigin-Name: f3112e67cdb27c1aec8d2cee3cb91ade061d093e13505894698e26336898b336
 2018-02-13 18:48:08 +00:00
dan a916b57013 Fix a bug causing spurious "sub-select returns N columns expected 1" errors 
in join queries with a term like "(a, b) IN (SELECT ...)" in the WHERE clause.

FossilOrigin-Name: 14dfd96f9bca2df5033b2d894bf63cc8bf450a45ca11df5e3bbb814fdf96b656
 2018-01-23 16:38:57 +00:00
drh ef7231b865 Fix SQLITE_DBCONFIG_TRIGGER_EQP so that it works even if SQLITE_DEBUG is 
not defined.

FossilOrigin-Name: afbbfff72002089fa73b5473cc98360df14288d489e93e667332d6e884ef60da
 2017-12-21 21:41:13 +00:00
drh 472e41ea16 Correctly invalidate a column cache line when it is overwritten with NULL. 
Fix for ticket [123c9ba32130a6c9d432].

FossilOrigin-Name: 65754dc3b830ef9482655d2e93c2cd4acaa7a8715a58d8309955d04378541f89
 2017-12-13 18:01:52 +00:00
drh 2410243e9d Improved fix for ticket [da78413751863] that does not require disabling the 
query flattener as was done in [005d5b870625].  This also makes the code
generator for vector IN operators a little easier to understand.

FossilOrigin-Name: 723f1be3d4a905a6a16333f8ef3e1067dcd4944497b303033c49946fc37c780f
 2017-11-17 21:01:04 +00:00
drh 9b1ecb67c3 New assert() statements in the rowvalue IN expression processing. 
FossilOrigin-Name: 00c328317473cee8fd7bd92c58409a356337b727cfa562bd8de59350d978769c
 2017-11-17 17:32:40 +00:00
drh 9d9c41e25e Remove unnecessary NEVER() and ALWAYS() conditionals. 
FossilOrigin-Name: 1c80c75d4be2f3d44fb18bb4c07eccac2aba79b688215a741317dfc47dc7c2ce
 2017-10-31 03:40:15 +00:00
dan d03024d814 Enhance the vtab interface to handle IS, !=, IS NOT, IS NULL and IS NOT NULL 
constraints.

FossilOrigin-Name: 34c8e952616013deb6fffec701ac5989afac9bef1bf92458a2e4ba92c7ee924f
 2017-09-09 19:41:12 +00:00
drh f49759bf03 Fix a few over-length source code lines. No functional changes. 
FossilOrigin-Name: 1783c54ce9dcb4b2c4f2a66f6d3315e646b71b54a8899fc32a7bf0f935a21f7f
 2017-08-25 19:51:51 +00:00
drh 1d42ea71c2 Enhance the like optimization so that it works with an ESCAPE clause. 
FossilOrigin-Name: f5d330f495d07a704e115595bbdf5422ddb68fd8191114c5a12c9c873d983f7c
 2017-07-27 20:24:29 +00:00
drh 66a0bf31cc Additional debugging Noop-comment in the constraint generator when 
wheretrace is enabled.

FossilOrigin-Name: 0ca7474f05e9f27f53f8c71f5a3ff99963ffef9be9c147869e096246d552d6f1
 2017-07-10 16:38:14 +00:00
dan d3930b1266 Fix another problem on this branch. 
FossilOrigin-Name: a4fc98113aeb10860834f68a2fdcef690ea15d8303d23b6dd416994a4b7edab6
 2017-07-10 15:17:30 +00:00
dan 8674ec5a7f Fix a problem causing non-covered WHERE terms to be evaluated before covered 
WHERE terms.

FossilOrigin-Name: 7d3cb39f60951dcec1ff87da2c4ec998f993de5edf49ee5e5f480c6fe4e5a052
 2017-07-10 14:39:42 +00:00
dan ebc63013b7 When testing non-indexed WHERE constraints, test those that involve 
correlated sub-queries last of all. This increases the chances of not having
to run the sub-query at all.

FossilOrigin-Name: 1f9c1f359e4693954ba7e2bc7b172ef34eb046e4ca2796df8336975b9d6aa92b
 2017-07-10 14:33:00 +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 170ad68a40 Change the name of the OP_Seek opcode into OP_DeferredSeek for better 
clarity of function.  No functional code changes.

FossilOrigin-Name: ab33d299c7dab52703d06f3441c8a98c6c809b2612ec65d71aab2919bd2b1540
 2017-06-02 15:44:22 +00:00
drh 6ab3eb5d0e Minor size and performance improvements to the push-down optimization. 
FossilOrigin-Name: 91dfb61a1a25763bb0b5c1e353a9d584bc6de3f6eb445f54202ffe7f6fee6e8d
 2017-04-29 14:56:55 +00:00
dan 6f654a40e8 Within a loop that uses a non-covering index test, test non-indexed terms that 
can be tested without seeking the main table cursor before those that cannot.

FossilOrigin-Name: afe68f0a8060dc5c92cb1fb32a9f22bd36140cd2c0bb5b6cea853e169c5ed444
 2017-04-28 19:59:55 +00:00
drh eac5fc0476 Improved comments. Fix a problem when an indexed expression is used in an 
ORDER BY clause.

FossilOrigin-Name: c59eaf2b7cd2596733f349fc0fe979f71fd29bd73152a0c57066e0b69d5b7a4a
 2017-04-11 01:01:27 +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 3a3b420abb Query planner optimization to detect empty tables in a join early and bail out 
without doing excess work.

FossilOrigin-Name: 58797e9bafa95709e0f706a15f42f93b409e2db5
 2017-02-15 22:36:15 +00:00
dan f64ece143c Avoid redundant table b-tree cursor seeks in UPDATE statements that use the 
two-pass strategy.

FossilOrigin-Name: dc555b1039c6930f6d15355c698ff917a85e8056
 2017-01-28 19:45:34 +00:00
drh 861b1307cb The use P4_DYNAMIC in place of the P4_MPRINTF operand type. 
FossilOrigin-Name: 3954f83798ed78527280c9db6360c62a5134b9ec
 2016-12-07 20:22:31 +00:00
drh abfd35ea03 Performance improvement and size reduction in the Expr node allocator 
function sqlite3PExpr().

FossilOrigin-Name: 2a81763e68cdf9b8c46389b1e1a87bc2084b53e7
 2016-12-06 22:47:23 +00:00
drh 54cda4edbe Disable the query flattener optimization for SELECT statements that are on 
the RHS of vector IN operators.  This is a hack that fixes the bug
described in ticket [da7841375186386c]. A better solution that does not
disable the query flattener is needed, but this will server for the time
being.

FossilOrigin-Name: 005d5b870625d175fdf3c0e87d974006c569d9e1
 2016-11-17 13:13:25 +00:00
drh 9b4eaebc68 Enhance the OP_IdxInsert opcode to optionally accept unpacked key material. 
FossilOrigin-Name: 89d958abbac45f2ca5954080cd9e74ec9a07ebb2
 2016-11-09 00:10:33 +00:00
drh 48590fcb37 Make sure indexes on expressions skip over initial NULL values in the 
index.  Fix for ticket [4baa464912129477f3c9]

FossilOrigin-Name: 71797ba431085f9ae381ed5ea6471967926f4043
 2016-10-10 13:29:15 +00:00
drh e3c6b61cee Fix harmless compiler warnings. 
FossilOrigin-Name: 2dde3375124198560c8ff15f87aadde2afd722c5
 2016-10-05 20:10:32 +00:00
drh cb43a937e5 Allocate Parse objects off of the stack where appropriate for a substantial 
performance increase and a size reduction.

FossilOrigin-Name: ea8affa9e453b201b479162f621b591e7a65a489
 2016-10-03 01:21:51 +00:00
dan edc3537c61 Fix a problem causing incorrect code to be generated for IN constraints like "a IN (1, 2, 3)" where column "a" is a rowid column with an extra UNIQUE index created on it. Ticket [0eab1ac759]. 
FossilOrigin-Name: a92aee5520cfaf85ae896365a7e42bdd981f828d
 2016-09-16 16:30:57 +00:00
drh 72d5003ed8 Replace a faulty assert() with a testcase() to assure the condition is 
tested.

FossilOrigin-Name: a49bc0a8244feb08b83e716d81c2a9512c184539
 2016-09-16 15:42:17 +00:00
dan 26c8d0ca21 Fix a problem handling expressions like "(a, b) IN (SELECT ... ORDER BY 1, 2)" when there is an index on "a" but not "b". 
FossilOrigin-Name: 7f2c5c9ee3628c968306a5ab2e5a9a761f1b8055
 2016-09-07 19:37:20 +00:00
drh c097e122b9 Simplify the affinity handling logic in codeAllEqualityTerms(). Logically 
the same, just a little easier to read and understand.

FossilOrigin-Name: bbab9621f512b04684163b98b6fc669c68038044
 2016-09-07 13:30:40 +00:00
drh c7a77ae1c6 Avoid unnecessary memory allocations for aiMap in codeEqualityConstraints. 
FossilOrigin-Name: 70319c3d76abd1e403fcf2a62668736b92a5f3d5
 2016-09-06 17:13:40 +00:00
drh aaf8a0643e Avoid a NULL pointer deref in codeAllEqualityConstraints() following an OOM. 
FossilOrigin-Name: c6e528c1c0f17c69c7745b018afa36694118258f
 2016-09-06 16:53:53 +00:00
dan 1c12657f9a Simplify the fix in commit [7d9bd22c]. 
FossilOrigin-Name: bd5a342008575bf66f63881a0bebf43741f2a67b
 2016-09-06 16:33:24 +00:00
drh 099a0f5f54 Fix the header comment on codeEqualityTerm(). 
FossilOrigin-Name: b7e710e406ed22bcc316099b5e200b6bb2d9c872
 2016-09-06 15:25:53 +00:00
dan 83c434e68d Fix a problem handling (a, b) IN (SELECT ...) expressions when there is an index on just one of "a" or "b". 
FossilOrigin-Name: 231c72d9f651f3a70d5c8af080f3ff181b89d939
 2016-09-06 14:58:15 +00:00
dan 2718960316 Consider the affinity of "b" when using an "a IN (SELECT b ...)" expression with an index on "a". Fix for [199df416]. 
FossilOrigin-Name: f5e49855412e389a8a410db5d7ffb2e3634c5fa3
 2016-09-03 15:31:20 +00:00
drh 0c36fca004 Fix a post-OOM crash in updateRangeAffinityStr(). Add several ALWAYS() 
macros on unreachable branches.

FossilOrigin-Name: 87d40195ae5cc2abd9bae45073a615db81263285
 2016-08-26 18:17:08 +00:00