drh
05a86c5c0f
Enhance the code generator for INSERT INTO ... SELECT so that the SELECT
...
generates output directly in the registers that INSERT INTO will be using,
in many cases, and OP_SCopy operations can thus be avoided.
FossilOrigin-Name: aa2d8b0e8154dd2f5e2c837dc11ab362b083495b
2014-02-16 01:55:49 +00:00
drh
a6e3a8c9d5
Fix a pointless conditional. Add a test case.
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FossilOrigin-Name: 9367632dd7e4fec9197227e35b0627c2e81ebffc
2014-02-10 21:07:51 +00:00
drh
8af9ad951d
Fix the compound-select-to-subquery converter so that it works with the
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new compound-select object linkage introduced as part of the fix
for ticket [31a19d11b97088296].
FossilOrigin-Name: 572d4be4db03ce4afe9ae70f148703c74e0d8de0
2014-02-10 18:56:05 +00:00
drh
d227a291b2
Use the WITH clause to help resolve names for SELECT statements on the left
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of a compound query. Proposed fix for ticket [31a19d11b97088296a].
FossilOrigin-Name: 67bfd59d9087a987f15f6148efa1ff104983e1fb
2014-02-09 18:02:09 +00:00
drh
5f61229504
Do away with the "multi-register pseudo-table" abstration. Instead, just
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use an OP_SCopy to load results directory from the result registers of
the co-routine.
FossilOrigin-Name: 1e64dd782a126f48d78c43a664844a41d0e6334e
2014-02-08 23:20:32 +00:00
drh
725de29a2d
Tweaks to the generated VDBE code to make it a little easier to follow.
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FossilOrigin-Name: 129217ee91782ec77ff82661753ae5bee8ca99d0
2014-02-08 13:12:19 +00:00
drh
e0e261a473
Enable constant expression factoring even if no tables are read and no
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transaction is started.
FossilOrigin-Name: a45b87713c0afca2be2ace9500513620a024c0a2
2014-02-08 04:24:37 +00:00
drh
aceb31b120
Change the OP_Trace opcode to OP_Init and give it the ability to jump to the
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initialization code at the bottom of the program, thus avoiding the need for
an extra OP_Goto.
FossilOrigin-Name: 192dea97316144f15f6dd0eabff08a0bf9ef203e
2014-02-08 01:40:27 +00:00
drh
ed71a839fd
Change the OP_InitCoroutine instruction to jump over the co-routine
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implementation.
FossilOrigin-Name: a522f364a6b8ca6f69c353b30609a2166f6e94cf
2014-02-07 19:18:10 +00:00
drh
81cf13ec7b
Get rid of the OP_Undef and OP_IsUndef opcodes in favor of higher-level
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OP_InitCoroutine and OP_EndCoroutine.
FossilOrigin-Name: 1ec0e9dd4b26d9f597adc8e062317d4866c5a6a6
2014-02-07 18:27:53 +00:00
drh
ee06c99b49
Remove the SF_Materialize flag from the SELECT object as it does not
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accomplish anything useful.
FossilOrigin-Name: 65d5dcddbd34dfb2733a7a908c7c652ce2d610fe
2014-02-04 20:46:41 +00:00
dan
b68b97789e
Fix a problem causing SQLITE_OMIT_COMPOUND_SELECT builds to fail.
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FossilOrigin-Name: b30db0ac3096b43d55a6da40cafc7de569082bf8
2014-01-25 12:16:53 +00:00
dan
53bed45ecb
Select collation sequences for ORDER BY expressions attached to recursive CTEs in the same way as they are selected for other compound SELECT statements.
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FossilOrigin-Name: 9554519c126c5e714421a82fd2e8aa9b19e11493
2014-01-24 20:37:18 +00:00
dan
cfe24586a8
Avoid an extra seek when inserting records into the epheremal index used to ensure that rows returned by UNION recursive queries are unique.
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FossilOrigin-Name: 72c4b3f07a3faacb5b62d5bc374b4e125a0bd8b3
2014-01-22 19:23:30 +00:00
drh
edf83d1e3d
Fix harmless compiler warnings.
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FossilOrigin-Name: dea2ca6a159d5dcfd8deceedf1c2a73fb4ac1cfc
2014-01-22 18:31:27 +00:00
drh
aa9ce7078a
Add support for LIMIT and OFFSET in a recursive query.
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FossilOrigin-Name: 1945484e6b9769c1943f750f5b09860417fb190a
2014-01-22 18:07:04 +00:00
drh
fe1c6bb9c2
Get ORDER BY working for recursive queries.
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FossilOrigin-Name: 37b343b01841b338954ddfa9b76d92aa50037aec
2014-01-22 17:28:35 +00:00
drh
781def29c7
Add new SelectDest codes, SRT_Queue and SRT_DistQueue in anticipation of adding
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ORDER BY support on recursive queries. Factor out the recursive query
code generator into a separate procedure.
FossilOrigin-Name: 3eb5f9f8d6ac1ee145cb4119087c516f66fe1456
2014-01-22 13:35:53 +00:00
drh
340309fd69
Remove an unnecessary parameter from selectInnerLoop(). Clean up comments.
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FossilOrigin-Name: 5e6c4a55f6df30da9dbaa8170f3223613cc86f65
2014-01-22 00:23:49 +00:00
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).
...
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.
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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
...
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.
...
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
...
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
...
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
