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264 Commits

Author SHA1 Message Date
drh
958d261bb8 Fix harmless compiler warnings. 
FossilOrigin-Name: f8f72ecb9052a4cace1db75879fb8b5131ea4f50
 2014-04-18 13:40:07 +00:00
dan
fad9f9a8a6 When sorting data for a CREATE INDEX statement in single-threaded mode, assume that keys are delivered to the sorter in primary key order. Also fix various comments that had fallen out of date. 
FossilOrigin-Name: 821d1ac4504243fa13b9e3c0d56361ad9fb80d78
 2014-04-01 18:41:51 +00:00
drh
a1f7c0a21c Enhance the sqlite3VdbeRecordCompare() routines so that if they encounter 
database corruption, they will set the UnpackedRecord.isCorrupt field and
return 0.  The sqlite3BtreeMovetoUnpacked() routine detects this and returns
SQLITE_CORRUPT, causing the corruption to be reported back to the top-level.

FossilOrigin-Name: 7fa85eaaaf6d211378620d728a759fdfe30a15b0
 2014-03-28 03:12:48 +00:00
drh
65ea12cb4a Make it possible for block-sort to use the OP_SorterOpen sorter in addition 
to a generic OP_OpenEphemeral.

FossilOrigin-Name: 7ce2daafd39a117041bfdd0a7132e2764fe7a74b
 2014-03-19 17:41:36 +00:00
drh
079a307259 First attempt at getting block-sort to work. This is an incremental check-in. 
There are many problems still to be worked out.

FossilOrigin-Name: 59742dd4c5259883850044d0938248b009ebd045
 2014-03-19 14:10:55 +00:00
mistachkin
afc14f72ef Experimental simplification of memory flags/type handling. 
FossilOrigin-Name: bac2820e13a79d91d0f8938c643134a9d6900327
 2014-03-05 01:29:18 +00:00
drh
295aedf097 Fix compiler warnings. 
FossilOrigin-Name: ba8993727e5752cbc92c7d78437e9e0510c899f7
 2014-03-03 18:25:24 +00:00
drh
c91b2fd310 Change the MEM_Dyn flag so that it means that Mem.xDel exists and must be 
used to free the string or blob.  Add tighter invariant checks on Mem.

FossilOrigin-Name: 44e1c33767cae3bf2cbd2238831fe67197009b43
 2014-03-01 18:13:23 +00:00
drh
75fd054201 Factor the Mem invariant checker into a separate procedure (rather than a 
macro) so that it can be more easily extended.

FossilOrigin-Name: 354699d50e7d251504a7b3d6fbec9e5bcf99557f
 2014-03-01 16:24:44 +00:00
drh
defbd9dade Add extra assert() statements trying to catch a Mem object in an inconsistent 
state.

FossilOrigin-Name: 4aeb3ae435c78070232fef21a147fde4e1c5cd31
 2014-03-01 14:45:18 +00:00
drh
1b27b8c0a0 Faster and smaller implementation of sqlite3_value_type(). 
FossilOrigin-Name: 5708bc24b8cab623b833121183042b43e5a7021b
 2014-02-10 03:21:57 +00:00
drh
5f61229504 Do away with the "multi-register pseudo-table" abstration. Instead, just 
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
ed71a839fd Change the OP_InitCoroutine instruction to jump over the co-routine 
implementation.

FossilOrigin-Name: a522f364a6b8ca6f69c353b30609a2166f6e94cf
 2014-02-07 19:18:10 +00:00
drh
a5750cfe01 Add the OP_Undef and OP_IsUndef opcodes. With these, use the first register 
in the result register range as the flag to indicate EOF on an INSERT from
a SELECT, rather than allocating a separate boolean register for that task.

FossilOrigin-Name: 6fb7448550f28a3c93053e125faeaf11de1011d0
 2014-02-07 13:20:31 +00:00
drh
73d5b8f550 Move elements of the Vdbe object that are only used during statement 
preparation out into the Parse object.

FossilOrigin-Name: c289a253c0c053ac8fc344efe138262c327d8096
 2013-12-23 19:09:07 +00:00
drh
9ac7962ace Show changes to the column cache when PRAGMA vdbe_addoptrace=ON is set. 
FossilOrigin-Name: 4c6a659c432e4f7c0285f58675a67f967b07bb0d
 2013-12-18 15:11:47 +00:00
drh
a9ab481fca Fix harmless compiler warnings. 
FossilOrigin-Name: a7e5fcd66659750eb2f4675082df324e7cf35427
 2013-12-11 11:00:44 +00:00
drh
024045fe6e Avoid unnecessary calls to sqlite3VdbeSerialType() from within 
sqlite3VdbeSerialPut().

FossilOrigin-Name: 079c04a5013074b68f7d90f1ce8bf8e7092ad8a2
 2013-12-10 21:38:08 +00:00
drh
038b7bc4ef Simplifications to the OP_MakeRecord opcode and the sqlite3VdbeSerialPut() 
helper function.

FossilOrigin-Name: 7277a769694787e0332d1a4efc02041834661e2a
 2013-12-09 23:17:22 +00:00
drh
501932ca68 Changes some offset and amount parameters from "int" to "u32" to avoid 
harmless signed/unsigned comparison warnings.

FossilOrigin-Name: 4e8c5d0795cb7c603182bfa70f3855d654f0997e
 2013-11-21 21:59:53 +00:00
drh
5cc1023e1c Reduce the size of VdbeCursor again, this time without a performance hit. 
FossilOrigin-Name: 933939932c44bccb0958f203a5bd24e683c1cf38
 2013-11-21 01:04:02 +00:00
drh
1fd522ff49 Unpack some fields, adding some space back to the VdbeCursor object, 
in order to help the code to run a little faster.

FossilOrigin-Name: f8d5efcd7b92492b833b6cd1cb6bec006c6a0809
 2013-11-21 00:10:35 +00:00
drh
14da87f8c5 Reduce the size of the VdbeCursor object from 144 to 120 bytes. 
FossilOrigin-Name: 5f9d50688508affd0bc8e4d52e21dacfacdbb5ce
 2013-11-20 21:51:33 +00:00
drh
399af1d2c2 Refactoring the OP_Column opcode for improved performance and 
maintainability.

FossilOrigin-Name: 7c914e3997d2b28164a2fa7eb4398262b6ddb4b2
 2013-11-20 17:25:55 +00:00
drh
79353dbd5f Simplifications to the VdbeCursor object. 
FossilOrigin-Name: 5562cd343d8f69242e06a51a7f1aef7ee7d78eec
 2013-11-20 02:53:58 +00:00
drh
84e55a80db Add the "PRAGMA vdbe_eqp" command, only available with SQLITE_DEBUG. Simplify 
some of the other debugging logic.

FossilOrigin-Name: 8ce33f4c818e1c785a1c176f6f631b8184e1166b
 2013-11-13 17:58:23 +00:00
drh
1153c7b25d Size KeyInfo objects so that IdxInserts always compare the correct number of 
fields.

FossilOrigin-Name: 302a81390f039fc23eeb8510e95b9d9fa0b41edd
 2013-11-01 22:02:56 +00:00
drh
11e85273df Work on the UPDATE and INSERT logic. This is an incremental check-in so that 
can switch over to trunk to work on an unrelated issue there.

FossilOrigin-Name: 086ec2a177b24ad90d5d705a99d93aa0c1545217
 2013-10-26 15:40:48 +00:00
drh
95a7b3e36d The date and time functions use the exact same notion of "now" for every 
invocation within the same call to sqlite3_step().

FossilOrigin-Name: daf6ba413cb3cb6065774ba07495eab4a28b49b0
 2013-09-16 12:57:19 +00:00
drh
9b47ee3f09 Performance optimizations in the VDBE and especially to the OP_Next and 
related opcodes and in the sqlite3BtreeNext() and sqlite3BtreePrevious()
routines.  This is a cherrypick of [6f99b54aedeb], [d2efea1682a7], and
[d78c5d89de4b].

FossilOrigin-Name: 7f72fc4f47445a2c01910b268335873de9f75059
 2013-08-20 03:13:51 +00:00
dan
0c5477997b Ensure that all auxiliary data registered by calls to sqlite3_set_auxdata() is destroyed when the VM is halted. Partial fix for [406d3b2ef9]. 
FossilOrigin-Name: 71effa59c98d167e6e4b269e59ad5f468e664ac1
 2013-07-18 17:12:08 +00:00
drh
648e264342 Add the "defer_foreign_keys" pragma and the SQLITE_DBSTATUS_DEFERRED_FKS 
value for sqlite3_db_status().  This is a cherry-pick of a sequence of five
checkins in the sessions branch between [1d44e5d3c2] and [d39e65fe70].

FossilOrigin-Name: 527121ac3cdc96ac33ad975c227a6685a2f7e999
 2013-07-11 15:03:32 +00:00
drh
1713afb025 Refactor the Vdbe.noIO field as Vdbe.bIsReader. The meaning is inverted. 
FossilOrigin-Name: 59f98c5c241e5a61cd5b6d0e69b55a6b44c5cafc
 2013-06-28 01:24:57 +00:00
drh
9e92a47bdf Make sure that sqlite3_stmt_readonly reports false for 
PRAGMA journal_mode and PRAGMA wal_checkpoint.  Ticket [a589ec069e3].
Also keep track of whether a prepared statement does no reading or
writing.

FossilOrigin-Name: 1937fd8eec2c1da95a782d9dc63926d846b06bdc
 2013-06-27 17:40:30 +00:00
drh
bf159fa21b Add a new (experimental) sqlite3_stmt_status() verb that returns the number 
of VM steps.

FossilOrigin-Name: f1366bab737a3ac2ea20a0ec014cc306d7ded8a5
 2013-06-25 22:01:22 +00:00
drh
60625313b0 Increase the default SQLITE_MAX_SCHEMA_RETRY to 50. Make sure that macro 
covers every case where a prepared statement might need to be reprepared due
to a schema change.  The sqlite3_exec() interface now uses 
sqlite3_prepare_v2().

FossilOrigin-Name: c1d7304c80c4a6244c8a9f6fad1eebd0f339c724
 2013-04-06 18:06:51 +00:00
drh
dba0cb2351 Remove the SQLITE_OMIT_MERGE_SORT compile-time option and its related code. 
The merge sorter is now a required component.

FossilOrigin-Name: 8b44d6fb159e85267095e846cded2764c3bcb895
 2013-03-24 22:56:49 +00:00
drh
928d9c6209 Fix harmless compiler warnings. 
FossilOrigin-Name: 4a7b4ee011fea911b981206c242e3d5553303b52
 2013-02-07 09:33:56 +00:00
drh
d2a5623866 Issue an error message and quit (rather than overflowing a reference counter) 
if the number of references to a table exceeds the maximum due to nested
UNION views.  Fix for ticket [d58ccbb3f1].

FossilOrigin-Name: c2462a95ed8e1e69886681400d673207d906bf1b
 2013-01-28 19:00:20 +00:00
drh
21172c4cc0 Add an optimization that attempts to run a subquery as a coroutine rather 
than manifesting it into a temporary table.

FossilOrigin-Name: 7af3acbbd49a2114fcdada9ec907c68ba9b053bd
 2012-10-30 00:29:07 +00:00
drh
053a128f55 Tighter VDBE code for the WHERE_DISTINCT_ORDERED case of DISTINCT keyword 
handling.

FossilOrigin-Name: 94b48064db3cbb43e911fdf7183218b08146ec10
 2012-09-19 21:15:46 +00:00
drh
37f58e9902 Avoid repeating calls to the sqlite3_trace() callback when the same statement 
is evaluted multiple times by sqlite3_step() due to an SQLITE_SCHEMA
reprepare.

FossilOrigin-Name: 39f763bfc04174ee0fe2cdf6a92b7c12f726bd1b
 2012-09-04 21:34:26 +00:00
drh
c041c16ce1 Mark parameters to sorter interfaces as const where appropriate. 
FossilOrigin-Name: d8da26f1f43610ac83af2a5d0e170be5abaf7aaa
 2012-07-24 19:46:38 +00:00
drh
3fb757b487 More structure packing for smaller objects and less memory usage. 
FossilOrigin-Name: f14e7f29ff7f2d7706dc3cdd715e103e04ba0ef1
 2012-02-02 21:02:43 +00:00
drh
7a95789c0c For queries of the form "SELECT p, max(q) FROM t1", the value of column p 
returned is the one on the same row that holds the maximum value of q.

FossilOrigin-Name: adb29232b659c5332b6841776372407fcc350b08
 2012-02-02 17:35:43 +00:00
drh
c35f3d5027 Very small performance enhancement and reduction in size of the sqlite3_stmt 
object.

FossilOrigin-Name: a38d57a4e5d79a0baefdf776e0e2d61423681a4f
 2012-02-01 19:03:38 +00:00
drh
45d29309a7 Fix typos in commands. Combine the ExpandBlob and expandBlob macros into one. 
FossilOrigin-Name: fc9179e154751b51ddef429600d30a89d4a098bd
 2012-01-08 22:18:33 +00:00
drh
e4c88c0c38 Fix typos and comments and make minor changes to a few function names, 
as suggested by readership.

FossilOrigin-Name: e9d05cbb7676cbda83f1b3b71447404d7edde898
 2012-01-04 12:57:45 +00:00
drh
678a9aa7bd Import the experimental parse-tree explainer, with fixes, from the 
tree-explain branch.

FossilOrigin-Name: bcbc7152d49107afa926c8950360c61a6cf3d244
 2011-12-10 15:55:01 +00:00
drh
a5eec8c8c3 Merge the latest trunk changes into tree-explain branch. 
FossilOrigin-Name: 1a360da0f8314f232c224c71829646bc7558892b
 2011-12-10 14:44:31 +00:00