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Overview
| Comment: | Improvements to the PRAGMA secure_delete documentation. |
|---|---|
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ec87587f77ee011b45970f403a111793 |
| User & Date: | drh 2016-08-09 17:38:47 |
Context
|
2016-08-09
| ||
| 19:48 | Update fts5.html to document negative column filters. check-in: e79e555f14 user: dan tags: trunk | |
| 17:38 | Improvements to the PRAGMA secure_delete documentation. check-in: ec87587f77 user: drh tags: trunk | |
| 00:13 | Properly escape "<" and ">" characters in the vtab.html document. check-in: 03ec352945 user: drh tags: trunk | |
Changes
Changes to pages/pragma.in.
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application makes faulty assumptions about output order can be
identified and fixed early, reducing problems
that might be caused by linking against a different version of SQLite.
</p>
}
Pragma secure_delete {
<p>^(PRAGMA DB.secure_delete;
<br>PRAGMA DB.secure_delete = </b><i>boolean</i></p>
<p>Query or change the secure-delete setting.)^ ^When secure-delete
on, SQLite overwrites deleted content with zeros. ^The default
setting is determined by the [SQLITE_SECURE_DELETE]
compile-time option.
<p>
^When there are [ATTACH | attached databases] and no database
is specified in the pragma, all databases have their secure-delete
setting altered.
^The secure-delete setting for newly attached databases is the setting
of the main database at the time the ATTACH command is evaluated.
|
| | | | > > > > > |
894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 |
application makes faulty assumptions about output order can be
identified and fixed early, reducing problems
that might be caused by linking against a different version of SQLite.
</p>
}
Pragma secure_delete {
<p>^(<b>PRAGMA DB.secure_delete;
<br>PRAGMA DB.secure_delete = </b><i>boolean</i></p>
<p>Query or change the secure-delete setting.)^ ^When secure_delete is
on, SQLite overwrites deleted content with zeros. ^The default
setting for secure_delete is determined by the [SQLITE_SECURE_DELETE]
compile-time option and is normally off. The off setting for
secure_delete improves performance by reducing the
amount of disk I/O. Applications that wish to avoid leaving
forensic traces after content is deleted or updated should enable the
secure_delete pragma prior to performing the delete or update, or else
run [VACUUM] after the delete or update.
<p>
^When there are [ATTACH | attached databases] and no database
is specified in the pragma, all databases have their secure-delete
setting altered.
^The secure-delete setting for newly attached databases is the setting
of the main database at the time the ATTACH command is evaluated.
|