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Never allow the b-tree layers view of the number of pages in the database

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file exceed the actual number of pages in the database file, even when
PRAGMA writeable_schema=ON.  This helps with earlier detection of corruption,
and prevents excess memory usage and CPU cycles in some integrity_check ops.

FossilOrigin-Name: 0407c8793700491b8519a649b9624f569b0e7e9b94d0db79d4a08139e0ecdb69
This commit is contained in:
drh
2022-01-17 14:42:38 +00:00
parent 7d44b22d45
commit 5a6f818d84
4 changed files with 16 additions and 13 deletions
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3
src/pager.c
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@@ -3945,8 +3945,7 @@ static void assertTruncateConstraint(Pager *pPager){
** then continue writing to the database.
*/
void sqlite3PagerTruncateImage(Pager *pPager, Pgno nPage){
assert( pPager->dbSize>=nPage || CORRUPT_DB );
testcase( pPager->dbSize<nPage );
assert( pPager->dbSize>=nPage );
assert( pPager->eState>=PAGER_WRITER_CACHEMOD );
pPager->dbSize = nPage;