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tclsqlite-db-copy-fix
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86 Commits

Author SHA1 Message Date
dan
3115b36d67 Fix a segfault that could occur if a non-empty in-memory database was the destination of a backup operation from a database with a smaller page size. 
FossilOrigin-Name: 020968f857d7b90bab3525fc9d6b859a019f6a80422c3d5ffb88f5bdb8e02a11
 2023-04-19 17:07:35 +00:00
drh
92ecf306ec Fix an obscure problem in sqlite3_backup_init() caused by 
[6a45d8fe8bfbc11a|check-in 6a45d8fe8bfbc11a].  See
[forum:/forumpost/8b39fbf3e7b5c278|forum post 8b39fbf3e7] for
the original bug report.

FossilOrigin-Name: 639fc7633bd740421d6b48617b9f68e6be525107e4049673fe720ea6158a393f
 2022-01-31 12:29:14 +00:00
drh
c692df2784 Make it so that any Parse object is always linked into the database conenction 
while it is active.  Hence, an OOM will cause Parse.nErr to be set.

FossilOrigin-Name: 6a45d8fe8bfbc11a5b86d25237e1f8bccfb0f22f3dcaf004ba797aeb57b365ec
 2022-01-24 15:34:55 +00:00
drh
99744fa4ab Add support for the sqlite3_txn_state() interface. 
FossilOrigin-Name: ad195e3dd89d0f33b50070c18fb8f43c4eb24162515dfdd7c04d9e7d96b902a2
 2020-08-25 19:09:07 +00:00
drh
e937df81f0 Fix the handling of reserve-bytes so that the maximum value of 255 can be used. 
FossilOrigin-Name: 99749d4fd4930ccf15227f67c732266af9e09dd3cabdc0834fb450ef98196441
 2020-05-07 01:56:57 +00:00
drh
b48c0d59fa Simplify the code by removing the unsupported and undocumented 
SQLITE_HAS_CODEC compile-time option

FossilOrigin-Name: 5a877221ce90e7523059353a68650c5fdd28ed032807afc2f10afbfbf864bdfe
 2020-02-07 01:12:53 +00:00
drh
55f66b341a Add new assert() statements in an attempt to help static analyzers avoid 
false-positives.

FossilOrigin-Name: 9e66458592d40fbd96ea5f21339573110ca1cfe328238a020c9420a87d35dd72
 2019-07-16 19:44:32 +00:00
mistachkin
bc8b231098 Fix harmless compiler warning seen with MSVC. 
FossilOrigin-Name: 5862b83eb36b93016d37e5b86ebb183d891bb553901facab1e5d83e114a38ec3
 2019-05-04 03:56:47 +00:00
drh
bb2d9b1bf1 Change sqlite3BtreeBeginTrans() to return the BTREE_SCHEMA_COOKIE, for a 
small speed improvement when starting new transactions.

FossilOrigin-Name: a10662aa915ae2b5a78b3e10920350d32255b2d6b1a8aac0aba1ad173b07ed2b
 2018-06-06 16:28:40 +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
drh
76729ed4be Correctly detect an OOM occurring in the setDestPgsz() subroutine of 
backup.

FossilOrigin-Name: d9d8a048d4b621435870b4f8dd13b2938ac2f8fd
 2016-09-02 21:17:51 +00:00
dan
033564cca9 Within a backup operation, ensure that a read-transaction is opened on the source database before its page size is read. This ensures the page-size used to write to the backup database is the same as its actual page-size, which is important for ZipVFS databases. 
FossilOrigin-Name: 7908fc604991d81140c182b97981fd724ad126ae
 2016-09-02 17:18:20 +00:00
dan
43c1ce390f Undo commit [f250166bb]. It is required to handle IO and other errors that occur within a VACUUM of a Zipvfs database. 
FossilOrigin-Name: ae72513af37cd806a6d94aaa7c47a740e119d3b1
 2016-08-05 16:16:26 +00:00
drh
d20b2a4109 Remove the sqlite3PagerClearCache() routine, which does not accomplish anything 
useful.

FossilOrigin-Name: f250166bb3c1b0c58e703b334825cf6210758fda
 2016-05-20 18:09:01 +00:00
mistachkin
fad3039c51 Enhance ability to debug out-of-memory errors. 
FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28
 2016-02-13 23:43:46 +00:00
drh
9584f58cc2 Rename the sqlite3PagerAcquire() function to sqlite3PagerGet(). The former 
macro called sqlite3PagerGet() has been removed.

FossilOrigin-Name: 708253be34084b89987efe955c34557516171a3a
 2015-11-04 20:22:37 +00:00
drh
58cb6dbe0d Take care that the number of reserved bits per page is consistent between 
the source and destination databases when doing the back-copy on a VACUUM.

FossilOrigin-Name: 5b61b72f5424a2d9bb4e68eb95026cd63f003db9
 2015-09-23 19:17:23 +00:00
drh
14681b739b Avoid create a stack from in sqlite3BackupUpdate() in the common case where 
the first argument is NULL.

FossilOrigin-Name: 2a897b9e94acaf1fd91e9f8e94fa52e01694f011
 2015-07-01 19:59:36 +00:00
drh
ad0961b31b Keep track of the optimal number of reserved bytes (by looking at reserve 
byte requests in calls to sqlite3BtreeSetPageSize()) and then change the
reserve byte count to the optimal when doing a VACUUM or when using the
backup API.

FossilOrigin-Name: 28c2b726285ea88b334acfd6390a057d2d244838
 2015-02-21 00:19:25 +00:00
dan
fad01993b7 Have calls to sqlite3_backup_init() fail if there is already a read or read-write transaction open on the destination database. 
FossilOrigin-Name: 169b5505498c0a7ee2b5dbb2ba13c41dfaa7c62f
 2014-11-13 14:18:25 +00:00
drh
47b7fc7843 Experimental changes that permit read operations to continue after a 
ROLLBACK, as long as the schema is unchanged.

FossilOrigin-Name: fa6e6a9ae276cad60e9a4abc1bc23cf2809ea786
 2014-11-11 01:33:57 +00:00
drh
9ca95730e3 Add the SQLITE_ENABLE_API_ARMOR compile-time option. This is a work in 
progress and is not yet completely functional.

FossilOrigin-Name: c297a84bc678f81ffc0aa9139ab73f0ca87c1971
 2014-10-24 00:35:58 +00:00
drh
13f40da31d Split the sqlite3Error() routine into sqlite3Error() and 
sqlite3ErrorWithMsg(), for a slight size reduction and performance increase.

FossilOrigin-Name: cf561d1f0bb60b3d638632d20bd686dda4fa4a04
 2014-08-22 18:00:11 +00:00
drh
a3cc007df4 Simplication and optimization of error message handling. 
FossilOrigin-Name: 9d347f547e7ba9590b0c68edf50a14ad94a2bb92
 2013-12-13 16:23:55 +00:00
dan
999cd08aae Modify the way some internal file-controls are invoked. In order to support multi-file transactions in the zipvfs extension. 
FossilOrigin-Name: 32fb1784af4594161d954343e3787db702000a4d
 2013-12-09 20:42:03 +00:00
drh
f30a969b80 Rework the logic that factors constant expressions out of inner loops, making 
it both simpler and faster.

FossilOrigin-Name: 8dc5c76c766828d7c28090bec30ff48227e7b140
 2013-11-15 01:10:18 +00:00
drh
b00fc3b14e Simplify the btreeGetPage() routine so that it uses a single flag parameter 
in place of two boolean parameters.

FossilOrigin-Name: 617e23ec283d3147fc3fd29c474ccedf4915cdc7
 2013-08-21 23:42:32 +00:00
drh
e1e2e9acd6 Make the MIN() and MAX() macros available in sqliteInt.h. Add TUNING 
comments to the NGQP and adjust costs slightly.

FossilOrigin-Name: 3a72af2a95b04b8e195ef17cb3e9d9021a4f0915
 2013-06-13 15:16:53 +00:00
drh
7e36962e6c Make use of xFetch, if it is available when doing a VACUUM or a backup. 
FossilOrigin-Name: 83bc37af07857960c11275891f853a358dcbbf05
 2013-04-03 03:53:15 +00:00
dan
f23da96636 Replace the sqlite3_io_methods.xMremap interface with sqlite3_io_methods.xFetch and xUnfetch. 
FossilOrigin-Name: 1431be95579160fb70408d43e17fc23c7b69ab4a
 2013-03-23 21:00:41 +00:00
dan
aa1d67b1d9 Fix a case where the mapped part of a database file may be written during a backup operation. 
FossilOrigin-Name: c8d67aefff7299dd5c8abeb2a3a52109c0a823ee
 2013-03-22 19:17:45 +00:00
dan
896f99e942 Catch a dropped error code in backup.c. 
FossilOrigin-Name: ac8ca3ecee4d81bf522b330033e5d85638063670
 2013-02-25 07:12:40 +00:00
dan
bc1a3c6ce2 If a rollback mode transaction reduces the size of the database file, avoid actually truncating the file until after the transaction has been committed (but before the db has been unlocked). This means pages that are removed from the database by truncating the file need not be journalled. 
FossilOrigin-Name: b73847f17b7ae1298dfc52de6c4c4bc809bc77a3
 2013-02-23 16:40:46 +00:00
dan
5cc3bea44a Ensure the database size field in the db header of a backup database is set correctly. Fix for [0cfd98ee201]. 
FossilOrigin-Name: ff6857b6ed6a46671006b75157d8cf853a816ef9
 2012-12-21 16:15:35 +00:00
dan
b483eba051 Ensure that when the source of a backup is a database that is zero bytes in size, the final destination database consists of at least one page. Truncating it to zero bytes is equivalent to zeroing the schema cookie and change counter, which can cause problems for existing clients. 
FossilOrigin-Name: af5c9ee4a453f71c03f24ad08824ced6c1b97afb
 2012-10-13 19:58:11 +00:00
dan
0094f37e1f Avoid calling sqlite3BtreeEnter() in a corner case where the corresponding database handle mutex (sqlite3.mutex) may not be held. This prevents a potential deadlock or crash that can occur if the backup API, shared-cache mode and SQLITE_HAVE_CODEC are all in use. 
FossilOrigin-Name: 89b8c377a6f03d9fa885f3f94c1f0b1eec263dea
 2012-09-28 20:23:42 +00:00
dan
6809c96df3 Replace a few sqlite3_malloc()+memset() sequences with calls to sqlite3MallocZero(). 
FossilOrigin-Name: 305b6667265353b858b79bfea1745e64ff3bb7d3
 2012-07-30 14:53:54 +00:00
drh
ed68801b20 Add the sqlite3_close_v2() interface (from the deferred-close branch) that 
allows close operations to happen out-of-order in bindings to
garbage-collected langauges.

FossilOrigin-Name: fb8893abeefabe9de44e34dcf4327764481189f5
 2012-06-21 15:51:42 +00:00
drh
4245c405ea The sqlite3_close() interface returns SQLITE_OK even if there are outstanding 
sqlite3_stmt and sqlite3_backup objects.  The connection becomes a zombie.
Resource deallocation is deferred until the last sqlite3_stmt or 
sqlite3_backup object closes.  This is intended to help SQLite play nicer
with garbage collectors.

FossilOrigin-Name: e276a02b7f54e804caa553dca99023416a415e1c
 2012-06-02 14:32:21 +00:00
drh
81028a455d The former sqlite3ResetInternalSchema() routine was really two different 
routines, selected by parameter, each with a confused mission.  So split
this routine up into three separate smaller routines, calling each
separately as needed.  Hopefully this will make further refactoring and
schema reset collateral damage containment easier.

FossilOrigin-Name: aa0c3493d3647d7efe527067e9fcccefda8e3008
 2012-05-15 18:28:27 +00:00
drh
0f198a7409 Change the ROLLBACK command so that pending statements to not block it. The 
pending statements instead return SQLITE_ABORT upon next access.  Note: This
causes separate shared-cache connections in read_uncommitted mode to abort as
well.

FossilOrigin-Name: 9b66c79e054c8a109d1ee8d35fed1c42814c330d
 2012-02-13 16:43:16 +00:00
drh
2bfe5b316c Check the return code from sqlite3OsFileControl() in sqlite3BtreeCopyFile() 
and report any errors that it generates.

FossilOrigin-Name: 7f852ac6435f1c9e25b07f816cca5ba40484579e
 2012-01-10 16:40:50 +00:00
drh
92c45cf0fe Remove the BenignMalloc() from around the call to FCNTL_OVERWRITE. Add 
new ones around sqlite3OsDelete().  Fix an assert that causes problems for
the nx-devkit.

FossilOrigin-Name: 38bc4236d5a9d9f22a525bf9308d90cd4d9ce5a4
 2012-01-10 00:24:59 +00:00
drh
c91663499e Combine various boolean variables in the BtShared structure into a single 
boolean vector.  Also make performance improvement simplifications to
sqlite3BtreeMovetoUnpacked().

FossilOrigin-Name: 119493318e0ad4c2858fe1484b0d71669bd81531
 2012-01-05 23:32:06 +00:00
dan
23a3de398e Add calls to the BenignMalloc() functions around the SQLITE_FCNTL_OVERWRITE call in backup.c. 
FossilOrigin-Name: 3e0833dbb736a1aca08d17941d6d33901b15a03b
 2011-12-31 10:18:00 +00:00
dan
1a83bc5b1a If an error occurs while writing to the database file during a VACUUM, discard the contents of the in-memory cache. This is required as if the database is a zipvfs database, the contents of the cache may be inconsistent with respect to the database as stored on disk. 
FossilOrigin-Name: 07159e84b40b01fa40cac5fad1f433888e5984f8
 2011-10-21 14:27:32 +00:00
drh
30ddce6ff4 Added the tool/warnings-clang.sh script. Changes so that there are no 
warnings with either gcc or clang even including FTS4 and RTREE and
both with and without SQLITE_THREADSAFE=0.

FossilOrigin-Name: 39408702a989f907261c298bf0947f3e68bd10fe
 2011-10-15 00:16:30 +00:00
dan
c5f20a0061 Add the SQLITE_FCNTL_OVERWRITE file-control. Used by SQLite to indicate to the OS layer that the current transaction will overwrite the entire file. 
FossilOrigin-Name: 1da87fcdacfa7d277c3ee98e410a9ea8b529c368
 2011-10-07 16:57:59 +00:00
drh
c5dbffe741 Reorder some of the branches in backup.c in order to make the code 
easier to test.

FossilOrigin-Name: 2c443d47ecee7b43a89f0a4bf299c46c66e3f80d
 2011-08-25 20:18:47 +00:00
dan
4b2704021a Replace an assert() that a condition may not occur in backup.c with code to handle that condition, which can occur. 
FossilOrigin-Name: 472c74b3452c5a07dfb006010441232b09599ad5
 2011-08-25 19:28:47 +00:00