August 2010
Intermediate to advanced
526 pages
23h 39m
English
Content preview from Using SQLiteBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
SQLITE_SECURE_DELETE — Enable secure delete
Common Usage
SQLITE_SECURE_DELETE
Default
Undefined (no overwrites)
Description
If defined, this directive sets the default secure delete option to on. SQLite will zero out deleted rows, as well as zero out and write back any recovered database pages before adding them to the free list. This prevents someone from recovering deleted data by examining the database file.
Be aware that SQLite cannot securely delete information from the underlying storage device. If the write operation causes the filesystem to allocate a new device-level block, the old data may still exist on the raw device. There is also a slight performance penalty associated with this directive.
See Also
secure_delete [PRAGMA, Ap F]
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