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.

Fo

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

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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: 6a45d8fe8bfbc11a5b86d25237e1f8bc

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

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Add support for the sqlite3_txn_state() interface.

FossilOrigin-Name: ad195e3dd89d0f33b50070c18fb8f43c4eb24162515dfdd7c04d9e7d96b902a2

Fix the handling of reserve-bytes so that the maximum value of 255 can be used.

FossilOrigin-Name: 99749d4fd4930ccf15227f67c732266af9e09dd3cabdc0834fb450ef98196441

Simplify the code by removing the unsupported and undocumented
SQLITE_HAS_CODEC compile-time option

FossilOrigin-Name: 5a877221ce90e7523059353a68650c5fdd28ed032807afc2f10afbfbf864bdfe

Add new assert() statements in an attempt to help static analyzers avoid
false-positives.

FossilOrigin-Name: 9e66458592d40fbd96ea5f21339573110ca1cfe328238a020c9420a87d35dd72

Fix harmless compiler warning seen with MSVC.

FossilOrigin-Name: 5862b83eb36b93016d37e5b86ebb183d891bb553901facab1e5d83e114a38ec3

Change sqlite3BtreeBeginTrans() to return the BTREE_SCHEMA_COOKIE, for a
small speed improvement when starting new transactions.

FossilOrigin-Name: a10662aa915ae2b5a78b3e10920350d32255b2d6b1a8aac0ab

Change sqlite3BtreeBeginTrans() to return the BTREE_SCHEMA_COOKIE, for a
small speed improvement when starting new transactions.

FossilOrigin-Name: a10662aa915ae2b5a78b3e10920350d32255b2d6b1a8aac0aba1ad173b07ed2b

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Allocate Parse objects off of the stack where appropriate for a substantial
performance increase and a size reduction.

FossilOrigin-Name: ea8affa9e453b201b479162f621b591e7a65a489

Correctly detect an OOM occurring in the setDestPgsz() subroutine of
backup.

FossilOrigin-Name: d9d8a048d4b621435870b4f8dd13b2938ac2f8fd

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

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

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Undo commit [f250166bb]. It is required to handle IO and other errors that occur within a VACUUM of a Zipvfs database.

FossilOrigin-Name: ae72513af37cd806a6d94aaa7c47a740e119d3b1

Remove the sqlite3PagerClearCache() routine, which does not accomplish anything
useful.

FossilOrigin-Name: f250166bb3c1b0c58e703b334825cf6210758fda

Enhance ability to debug out-of-memory errors.

FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28

Rename the sqlite3PagerAcquire() function to sqlite3PagerGet(). The former
macro called sqlite3PagerGet() has been removed.

FossilOrigin-Name: 708253be34084b89987efe955c34557516171a3a

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: 5b61b72f5424a2d9bb4e68eb95026

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

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Avoid create a stack from in sqlite3BackupUpdate() in the common case where
the first argument is NULL.

FossilOrigin-Name: 2a897b9e94acaf1fd91e9f8e94fa52e01694f011

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 VACUU

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

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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

This is a cherry-pick of version [b5df5ac052].

FossilOrigin-Name: d4b2d5d066891e06f2bf4337902b44b000fa9fd2

Experimental changes that permit read operations to continue after a
ROLLBACK, as long as the schema is unchanged.

FossilOrigin-Name: fa6e6a9ae276cad60e9a4abc1bc23cf2809ea786

Add the SQLITE_ENABLE_API_ARMOR compile-time option. This is a work in
progress and is not yet completely functional.

FossilOrigin-Name: c297a84bc678f81ffc0aa9139ab73f0ca87c1971

Split the sqlite3Error() routine into sqlite3Error() and
sqlite3ErrorWithMsg(), for a slight size reduction and performance increase.

FossilOrigin-Name: cf561d1f0bb60b3d638632d20bd686dda4fa4a04

Simplication and optimization of error message handling.

FossilOrigin-Name: 9d347f547e7ba9590b0c68edf50a14ad94a2bb92

Modify the way some internal file-controls are invoked. In order to support multi-file transactions in the zipvfs extension.

FossilOrigin-Name: 32fb1784af4594161d954343e3787db702000a4d