drh
e73f059093
Change the recursive common table expression algorithm to use a queue instead
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of a pair of tables. Runs about 25% faster on the sudoku solver query.
The OP_SwapCursors opcode is no longer required. The current implementation
uses just a fifo, but the plan is to change it into a queue that will support
ORDER BY and LIMIT in a recursive query.
FossilOrigin-Name: b2671e1133d2f1fbd36e7cd4b86d6cc7b528aa97
2014-01-21 22:25:45 +00:00
drh
c25e2ebc01
Remove an unused #define and add an assert(), both associated with WITH logic.
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FossilOrigin-Name: a06235e0f6aa1e8fefa3f2873ee035eac9dac750
2014-01-20 14:58:55 +00:00
drh
c59731c4ae
Minor simplification of error message text for a couple of errors associated
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with WITH clause processing.
FossilOrigin-Name: 2031004d960526d6426d50d7b732f37b281534e2
2014-01-17 18:34:28 +00:00
dan
98f45e53a7
Resolve table names within CTEs in the context in which the CTE is declared, not the context in which it is used.
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FossilOrigin-Name: a7323838bbd354a1c2f339e5e0f164f0eada47b3
2014-01-17 17:40:46 +00:00
drh
6785bcca58
Fix a compiler warning in selectPopWith().
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FossilOrigin-Name: c8eb11635a356182611ce2ccb8f358b6c453486e
2014-01-17 15:27:00 +00:00
dan
718569443d
Add support for common table expressions (WITH clauses).
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FossilOrigin-Name: 0171e3bb4f663a9414b0e8b64c87b5d0683855b5
2014-01-17 15:15:10 +00:00
dan
b290f11775
Fix some problems to do with WITH clauses and name resolution.
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FossilOrigin-Name: 6a549187ed8b5ed50daefa676ff666ae2ed43346
2014-01-17 14:59:27 +00:00
dan
2d4dc5fc60
Remove some code from resolve.c that was only required for recursive cte references in sub-queries. Also a stray "finish_test" command in pagerfault.test.
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FossilOrigin-Name: f68c6c4d36481526a9348244adc571ea282dc9eb
2014-01-17 11:48:24 +00:00
drh
65a2aaa633
Add the ability for the authorizer callback to disallow recursive
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queries.
FossilOrigin-Name: 9efc120a1548c03f3d8aabbadf1050ff2a119c31
2014-01-16 22:40:02 +00:00
drh
727a99f1e3
Tweaks to error message text.
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FossilOrigin-Name: 090a77d97808b86d1e9f5c63c743a2b159a15f5d
2014-01-16 21:59:51 +00:00
dan
f2655fe8b6
Improve the error messages used to report illegal recursive cte references.
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FossilOrigin-Name: 54eee9fe99290e59469bd3e1a66bb749887d37ee
2014-01-16 21:02:02 +00:00
dan
eae73fbfb9
Allow only a single recursive reference in a recursive CTE. Also require that this reference is not part of a sub-query.
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FossilOrigin-Name: a296b73360d34c9364eceb2cc09a9a92adc4abb8
2014-01-16 18:34:33 +00:00
dan
8290c2ad5a
Disable the flattening optimization if the parent query is the recursive part of a recursive CTE and the sub-query is a compound query.
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FossilOrigin-Name: 6bfa387e82de47ca1f40225fe28d873e29d6f481
2014-01-16 10:58:39 +00:00
drh
7b19f25247
Merge trunk changes. Fix a possible NULL-pointer deference in WITH clause
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name resolution.
FossilOrigin-Name: 7f953b568baa3eede0b9c144be0b9bc86496341a
2014-01-16 04:37:13 +00:00
drh
93c36bb399
Remove an ALWAYS() that is no longer always true.
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FossilOrigin-Name: c95823cd451f7721174393817a801403647467db
2014-01-15 20:10:15 +00:00
dan
eede6a538d
Fixes so that SQLITE_OMIT_CTE builds work.
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FossilOrigin-Name: 3908e2ea2e7e5f466cbbbffdc27e0fe8dc9751ac
2014-01-15 19:42:23 +00:00
drh
c49832c208
Further comments on WITH-clause processing routines in select.c.
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FossilOrigin-Name: c948384dfdd9f68a832d5a452af44f35337f66e7
2014-01-15 18:35:52 +00:00
drh
60c1a2f0b5
Add a header comment to the searchWith() routine.
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FossilOrigin-Name: d9ae0f5d9f8230ca7ca10ebed300e2f6635a0614
2014-01-15 18:23:00 +00:00
dan
f43fe6e9f6
When resolving names, consider a reference to a recursive CTE column as equivalent to a reference to the outermost name-context. This ensures that correlated sub-queries are correctly identified as such.
...
FossilOrigin-Name: 61be2da0ae623c1572819481508b044e9d32f294
2014-01-15 18:12:00 +00:00
dan
60e7068d75
Return an error if a CTE specifies a different number of columns than its SELECT statement returns.
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FossilOrigin-Name: 9a514b50e4b01f109fbdb0aabcbfe1ddab129b44
2014-01-15 15:27:51 +00:00
dan
bfe31e7f80
Disable the flattening optimization if the sub-query is a recursive CTE.
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FossilOrigin-Name: 9472f6d820a7fb233936d9b8f7a39c9d4c4d6d73
2014-01-15 14:17:31 +00:00
drh
f9db522fee
Use the user-supplied table name in WITH RECURSIVE tables as the internal
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name of the table and the name of the table in VDBE comments.
FossilOrigin-Name: a29330238be6366444269a0b1b328475b2d01ae2
2014-01-15 02:40:11 +00:00
dan
8ce7184bc2
Add code to handle recursive CTEs.
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FossilOrigin-Name: a5c2a54a07d35166911abc792008c05dea897742
2014-01-14 20:14:09 +00:00
drh
859bc542c6
For statements of just an unadorned VALUES clause, assign column names
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as "columnN" for increasing whole numbers N.
FossilOrigin-Name: 260587d2727f66d7fd65ef672ee46c92024f1d30
2014-01-13 20:32:18 +00:00
dan
4e9119d9e8
Add code to handle non-recursive CTEs in the same way as SQL views.
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FossilOrigin-Name: a26f399ba485e8127c276c5f103ec6c555e11734
2014-01-13 15:12:23 +00:00
drh
7e61d18eb4
Simplify the accumulator reset for aggregate query processing so that it
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uses a single multi-register OP_Null rather than a separate OP_Null for each
register.
FossilOrigin-Name: 2c7fd9b043f5f3d9d8e22dbefa84a9770ca951d0
2013-12-20 13:11:45 +00:00
drh
a021f121c9
Remove an unneeded column-cache flush in aggregate SELECT
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and an unreachable branch in the INSERT logic.
FossilOrigin-Name: ffa092e13b3781677b18418cca40e3dd1e388aed
2013-12-19 14:34:34 +00:00
drh
039468ef2d
Remove an unnecessary column-cache flush. Add another test case to the
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speedtest1.c program to accentuate the benefit of not flushing the cache at
that point.
FossilOrigin-Name: 97fdfc6b79833011fc0c506fe5e0985c0fb1906c
2013-12-18 16:27:48 +00:00
drh
9ac7962ace
Show changes to the column cache when PRAGMA vdbe_addoptrace=ON is set.
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FossilOrigin-Name: 4c6a659c432e4f7c0285f58675a67f967b07bb0d
2013-12-18 15:11:47 +00:00
drh
5b88bc4bec
Do not allow cursor hints to use expressions containing subqueries. This
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change fixes the problem seen in the previous check-in.
FossilOrigin-Name: bfefc57554853e467ee6aeaba8d08331406fa216
2013-12-07 23:35:21 +00:00
drh
d1a01edac9
When one or more arguments to a function are constants, try to factor
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out just those arguments into initialization code.
FossilOrigin-Name: 50d350abbc9176cd6fc606bc45b8fc3020719500
2013-11-21 16:08:52 +00:00
drh
c2acc4e466
Changes to make the new constant expression factoring logic more general
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and more testable.
FossilOrigin-Name: d10fb49a92f5f6e93093ae83544e5aec7984361a
2013-11-15 18:15:19 +00:00
drh
5c7917e4b4
A better (simpler) fix to the count(*) problem addressed in the previous
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check-in.
FossilOrigin-Name: 0f924c6ef6cf2ac5a61aafa8dd8e3309b3970499
2013-11-12 15:33:40 +00:00
drh
abcc1941db
Make sure the count(*) optimization works correctly on WITHOUT ROWID tables.
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FossilOrigin-Name: 91174779786be07d63f3c4a5277602ddc5f0ba26
2013-11-12 14:55:40 +00:00
mistachkin
c6efe12d0d
Fix memory type mismatch when compiled with MEMDEBUG.
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FossilOrigin-Name: 2c32bd6d4d5da2055633e8fb43ee184f729d8b91
2013-11-09 23:44:02 +00:00
drh
41e13e1268
Make sure cached KeyInfo objects are only valid for a single database
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connection. Clear all cached KeyInfo objects on any collating sequence
change.
FossilOrigin-Name: 55eea1782aead6a6aaf93f14d85486f8fd2209ad
2013-11-07 14:09:39 +00:00
drh
2ec2fb2269
Reference count the KeyInfo object. Cache a copy of an appropriate KeyInfo
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for each index in the Index object, and reuse that one copy as much as possible.
FossilOrigin-Name: defd5205a7cc3543cdd18f906f568e943b8b3a2c
2013-11-06 19:59:23 +00:00
drh
261c02d963
Basic DELETE operations now working on WITHOUT ROWID tables.
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FossilOrigin-Name: 9eafafa31c4a2bbcf48418743e0fcb17c374e9a6
2013-10-25 14:46:15 +00:00
drh
ad124329ab
Some inserts and queries working for multi-column primary keys
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and WITHOUT ROWID.
FossilOrigin-Name: b21d831b2aa55507dd9def2acb02cdbffddf10d1
2013-10-23 13:30:58 +00:00
drh
5f3e5e747d
Use #ifdefs to omit unused code in the columnType() routine depending on
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compile-time options.
FossilOrigin-Name: 3fd5e33217a91402b3499fa0977469b91618a928
2013-10-08 20:01:35 +00:00
drh
186ad8cc32
Further refinement of the idea of multiplying run-time cost estimates by
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the estimated row size.
FossilOrigin-Name: 18bd6ba96d19de6047baebfa15b1f739577c9ec4
2013-10-08 18:40:37 +00:00
drh
e13e9f54b0
Completely remove the iScanRatio field. The PRAGMA index_list(TABLE) command
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shows the estimated row size in the forth column. It also generates a row
for the table with an index name of NULL. The query planner still does not
take row size estimates into account - that is the next step.
FossilOrigin-Name: 8b4aa0c7a2122bbe60432edadf27e490e31ec987
2013-10-05 19:18:00 +00:00
drh
03e1754e31
Merge trunk changes.
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FossilOrigin-Name: c6ac80ed8d5240dd30783d62d9f133e159809dec
2013-10-04 20:39:44 +00:00
drh
d3037a4123
Further refinements of the index scanning speed logic.
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FossilOrigin-Name: e5d9371da92b4cc2c1df177cf40e0ced4d4c7421
2013-10-04 18:29:25 +00:00
drh
d9e3cad2f8
Progress toward using the iScanRatio information on indices. Many tests
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are still failing.
FossilOrigin-Name: 6c352edbba85a15ca356b5e131f4b3b2723d1774
2013-10-04 02:36:19 +00:00
drh
5f33f37580
Make sure the count(*) optimization works correctly even when partial
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indices are present. Ticket [a5c8ed66cae].
FossilOrigin-Name: 9f2f4c0a50808910ad01c8c4352367f25747be08
2013-10-04 00:00:12 +00:00
drh
ebb6a65d16
Refactor the ExprSetIrreducible() macro into ExprSetVVAProperty(*,EP_NoReduce).
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This is a naming change only. The logic is the same.
FossilOrigin-Name: 695aee46e9bdf15159ab52db7f522b30c91aed0f
2013-09-12 23:42:22 +00:00
drh
c5cd124900
Increase the number of bits available in Expr.flags. Other tweaks aimed at
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making expression processing more robust.
FossilOrigin-Name: 579a512538528cf4bb4381ba393c5d9e7310086b
2013-09-12 16:50:49 +00:00
drh
d36e104112
Combine the FuncDef.iPrefEnc and FuncDef.flags fields into a single
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new FuncDef.funcFlags field.
FossilOrigin-Name: 97b10e66e98e84755aa577f8da017bf1aea2056c
2013-09-06 13:10:12 +00:00
drh
d58d3278cb
Performance optimization: Avoid calling convertCompoundSelecctToSubquery()
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on queries that do not use the UNION, EXCEPT, or INTERSECT operators.
FossilOrigin-Name: c589b2fed7beabc2337d701094c22635914d9c23
2013-08-05 22:05:02 +00:00
