Fix a minor typo in a comment.

FossilOrigin-Name: cf61419f8816377f40ea032e1e3fb8b765ff7eb5b3a5ece8f7b59acffc5d3f05

The MemPage.aDataEnd field should point to the end of the data buffer for
the page, not just the end of the usable portion of that buffer. The purpose
aDataEnd is to detect cells that overflow the p

The MemPage.aDataEnd field should point to the end of the data buffer for
the page, not just the end of the usable portion of that buffer. The purpose
aDataEnd is to detect cells that overflow the page, and that won't work on a
page with reserved bytes and a cell that starts in the reserved region, unless
the boundary is at the very end of the page. Chromium issue 1276294.

FossilOrigin-Name: f839c0bc8388a31f6db5081906b66b9e129855ba27a13cf13bd995b083f7386e

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Store the page number for the PENDING_BYTE page in the Pager object, rather
than computing the page number every time it is needed, because it turns out
that number is needed quite frequently. This

Store the page number for the PENDING_BYTE page in the Pager object, rather
than computing the page number every time it is needed, because it turns out
that number is needed quite frequently. This saves a few hundred thousand
CPU cycles and a few bytes of code space.

FossilOrigin-Name: 5aa9c3eb45514d5eb7b32696d25a9aeb7dad485e1ea5adb833fac6d1f2105f1a

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Have the btree layer detect when a "DELETE FROM tbl" statement is clearing a database page that is still in use (due to database corruption) and report SQLITE_CORRUPT.

FossilOrigin-Name: a6fda39e81d

Have the btree layer detect when a "DELETE FROM tbl" statement is clearing a database page that is still in use (due to database corruption) and report SQLITE_CORRUPT.

FossilOrigin-Name: a6fda39e81d0da98dd6b60b32e6df786f0089c1f4ac7f3a2936afd118bd04353

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Change the name of the iDataVersion field of Btree to iBDataVersion to make
it distinct from Pager.iDataVersion.

FossilOrigin-Name: e4c44c0bca317c03f8e6d3aa7cc88e5f96159a3d91c07257d408f7db028fd151

Better integrate the changes on this branch with OP_Insert and OP_IdxInsert.

FossilOrigin-Name: 101cef14910d6e865a94bc870aed599321b893188062a9a61d70a9434992cf23

New test-control that returns the number of calls to
sqlite3BtreeMovetoUnpacked() on the main database and then resets the
counter. This only works for SQLITE_DEBUG builds.

FossilOrigin-Name: dca5b

New test-control that returns the number of calls to
sqlite3BtreeMovetoUnpacked() on the main database and then resets the
counter. This only works for SQLITE_DEBUG builds.

FossilOrigin-Name: dca5b91926431768babac28a6faf7674a5014db95caba727995b470e92b3182a

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Add support for the sqlite3_txn_state() interface.

FossilOrigin-Name: ad195e3dd89d0f33b50070c18fb8f43c4eb24162515dfdd7c04d9e7d96b902a2

Continuing work toward supporting unsigned 32-bit page numbers.

FossilOrigin-Name: 9ce1710aad43cebe5ad50859c7685fb83e40cdd4a60913bd2b7e659bc59942fd

Change the name of IntegrityCk.mallocFailed to IntegrityCk.bOomFault to
avoid confusion with the sqlite3 object field with the same name.

FossilOrigin-Name: 87c7d962581f4bb1224086701352850ede9847dc7

Change the name of IntegrityCk.mallocFailed to IntegrityCk.bOomFault to
avoid confusion with the sqlite3 object field with the same name.

FossilOrigin-Name: 87c7d962581f4bb1224086701352850ede9847dc76235b33c7c2a35ef594d382

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Refactoring various names. No changes in the resulting machine code.

FossilOrigin-Name: 7bb08b1bfcf184e4b59c8c9028926a0052612ff6a6731914ccdb8dee07ea4a98

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

FossilOrigin-Name: 99749d4fd4930ccf15227f67c732266af9e09dd3cabdc0834fb450ef98196441

The SQLITE_TESTCTRL_RESERVE operator is removed. In its place is the
more generate SQLITE_FCNTL_RESERVE_BYTES which is an API and which can
operator on more than just the main schema.

FossilOrigin-

The SQLITE_TESTCTRL_RESERVE operator is removed. In its place is the
more generate SQLITE_FCNTL_RESERVE_BYTES which is an API and which can
operator on more than just the main schema.

FossilOrigin-Name: abc1aad74f7b6a1e72fb09936239f2224aa942d16296c6a3de0b8daef4bc8471

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

FossilOrigin-Name: 5a877221ce90e7523059353a68650c5fdd28ed032807afc2f10afbfbf864bdfe

Do not allow triggers that run as part of REPLACE conflict resolution
during an UPDATE to modify the the table being updated. Otherwise, those
triggers might delete content out from under the update

Do not allow triggers that run as part of REPLACE conflict resolution
during an UPDATE to modify the the table being updated. Otherwise, those
triggers might delete content out from under the update operation, leading
to all kinds of problems. Ticket [314cc133e5ada126]

FossilOrigin-Name: db4b7e1dc399c1f16b827ac087aa37c0815f4b2f41f1ffad59963eead2ab5562

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Faster response to sqlite3_interrupt() in the OP_IntegrityCk and OP_Count
opcodes.

FossilOrigin-Name: bf875dc59909f9c22f7c1fc843bc4d9e5d97af5cb4ef43c4fa1d566ddfdeaacb

Change an assert() into a NEVER(), since the condition is difficult to prove
with certainty. Improved comment on the MemPage.nFree field.

FossilOrigin-Name: fec071b89df2cbafda365077bb54bc9999e12086

Change an assert() into a NEVER(), since the condition is difficult to prove
with certainty. Improved comment on the MemPage.nFree field.

FossilOrigin-Name: fec071b89df2cbafda365077bb54bc9999e12086f36d6cea8d125662b36638dc

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Defer computing the MemPage.nFree value of an in-memory btree page
until it is actually needed, since for many pages it is never needed.
This checkin works sufficiently to prove the concept, but stil

Defer computing the MemPage.nFree value of an in-memory btree page
until it is actually needed, since for many pages it is never needed.
This checkin works sufficiently to prove the concept, but still has issues
with exception handling.

FossilOrigin-Name: 1d43ee4000b71f5c6d49244dee96358c567f09ba3451b9d22895a796d3f61ad6

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Change the definition of the BtCursor.skipNext field so that it is undefined
for states CURSOR_VALID and CURSOR_INVALID.

FossilOrigin-Name: 6089d5dba73437d787259033e94a38cf1b0c87cac4a89c27e69d8239c2

Change the definition of the BtCursor.skipNext field so that it is undefined
for states CURSOR_VALID and CURSOR_INVALID.

FossilOrigin-Name: 6089d5dba73437d787259033e94a38cf1b0c87cac4a89c27e69d8239c22f496e

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Rearrange fields of the BtCursor object so that it is smaller and requires less
initialization, for a small performance improvement.

FossilOrigin-Name: 0ddf5292cc0411ec6fcb7399ecf2904c899e0488404d3f

Rearrange fields of the BtCursor object so that it is smaller and requires less
initialization, for a small performance improvement.

FossilOrigin-Name: 0ddf5292cc0411ec6fcb7399ecf2904c899e0488404d3f65490fbe1db15efdf4

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Interchange the numeric codes for CURSOR_VALID and CURSOR_INVALID to obtain
a small size decrease and performance increase.

FossilOrigin-Name: e0f192ea6dda4fa0b243d58c8ce41932519141bcae0689a90318b4f

Interchange the numeric codes for CURSOR_VALID and CURSOR_INVALID to obtain
a small size decrease and performance increase.

FossilOrigin-Name: e0f192ea6dda4fa0b243d58c8ce41932519141bcae0689a90318b4f866f54edd

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Avoid a test for CURTYPE_BTREE in sqlite3VdbeCursorMoveto() in order to reduce
the size and improve the performance of OP_Column.

FossilOrigin-Name: f078deb25149b7b1881b7f3374b343d0677e82336d8fdd7f1

Avoid a test for CURTYPE_BTREE in sqlite3VdbeCursorMoveto() in order to reduce
the size and improve the performance of OP_Column.

FossilOrigin-Name: f078deb25149b7b1881b7f3374b343d0677e82336d8fdd7f1cdd06d926b5dd57

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Btree optimization: New field BtCursor.pPage that points to the current page,
saving a single pointer dereference on each access.

FossilOrigin-Name: 373b71d19cad785922d5a80828f2fee0cbe7dff6594743e6

Btree optimization: New field BtCursor.pPage that points to the current page,
saving a single pointer dereference on each access.

FossilOrigin-Name: 373b71d19cad785922d5a80828f2fee0cbe7dff6594743e625bbdfa31b1ca131

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Experimental "PRAGMA secure_delete=FAST" pragma. The intent is to overwrite
deleted content with zeros without increasing the amount of disk I/O.

FossilOrigin-Name: f1682f0faf1a93ded066464b1ddd5f98

Experimental "PRAGMA secure_delete=FAST" pragma. The intent is to overwrite
deleted content with zeros without increasing the amount of disk I/O.

FossilOrigin-Name: f1682f0faf1a93ded066464b1ddd5f987e21ee0f6bb5e828ed31c3ad903cf2c3

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Remove unused fields from the BtCursor object.

FossilOrigin-Name: 1c0d82e0786ed22d07d774b8b166340fad97bcaab6016e395c469bcfcb7c77a3