Documentation Source Text

Check-in [0bf50a0382]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Add an entry on the cell_size_check pragma. Updates to the change log.
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 0bf50a0382767cbf9a5ac8c9394914c39b3ca9af
User & Date: drh 2015-05-29 19:05:46.572
Context
2015-05-30
20:51
Fix a typo in the SQLITE_BUSY_SNAPSHOT documentation. (check-in: fe158a6ae2 user: drh tags: trunk)
2015-05-29
19:05
Add an entry on the cell_size_check pragma. Updates to the change log. (check-in: 0bf50a0382 user: drh tags: trunk)
2015-05-25
09:22
Fix typo in the "deprecated" footnote on the pragma list. (check-in: 7555c435cc user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to pages/changes.in.
︙︙
17
18
19
20
21
22
23








24
25
26
27


28
29
30
31
32
33
34

  set aChng($nChng) [list $date $desc $options]
  incr nChng
}

chng {2015-00-00 (3.8.11)} {
<li>Added the [sqlite3_value_dup()] and [sqlite3_value_free()] interfaces.
<li>The [IS operator] is now able to drive indexes.








<p><b>Bug fixes:</b>
<li>Fix to CREATE TABLE AS so that columns of type TEXT never end up holding an INT
    value.  Ticket
    [https://www.sqlite.org/src/info/f2ad7de056ab1dc9200|f2ad7de056ab1dc9200]


}

chng {2015-05-20 (3.8.10.2)} {
<li>Fix an index corruption issue introduced by [version 3.8.7].  An index
    with a TEXT key can be corrupted by an [INSERT] into the corresponding 
    table if the table has two nested triggers that convert the key value to INTEGER
    and back to TEXT again.








>
>
>
>
>
>
>
>
|
|
|

>
>








17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

  set aChng($nChng) [list $date $desc $options]
  incr nChng
}

chng {2015-00-00 (3.8.11)} {
<li>Added the [sqlite3_value_dup()] and [sqlite3_value_free()] interfaces.
<li>The [IS operator] is now able to drive indexes.
<li>Enhance the query planner to permit [automatic indexing] on FROM-clause
    subqueries that are implemented by co-routine.
<li>Disallow the use of "rowid" in [common table expressions].
<li>Added the [PRAGMA cell_size_check] command for better and earlier
    detection of database file corruption.
<li>Improved fuzz-testing of database files, with fixes for problems found.
<li>Add the fuzzcheck test program and automatically run this program
    using both SQL and database test cases on "make test".
<p><b>Important bug fixes:</b>
<li>Fix to CREATE TABLE AS so that columns of type TEXT never end up
    holding an INT value.  Ticket
    [https://www.sqlite.org/src/info/f2ad7de056ab1dc9200|f2ad7de056ab1dc9200]
<li>Fix the [sqlite3_memory_used()] and [sqlite3_memory_highwater()] interfaces
    so that they actually do provide a 64-bit answer.
}

chng {2015-05-20 (3.8.10.2)} {
<li>Fix an index corruption issue introduced by [version 3.8.7].  An index
    with a TEXT key can be corrupted by an [INSERT] into the corresponding 
    table if the table has two nested triggers that convert the key value to INTEGER
    and back to TEXT again.
︙︙
Changes to pages/pragma.in.
︙︙
295
296
297
298
299
300
301











302
303
304
305
306
307
308

    significant.  So, for example,
    <b>'a' LIKE 'A'</b> is false but <b>'a' LIKE 'a'</b> is still true.)^</p>

    <p>^This pragma uses [sqlite3_create_function()] to overload the
    LIKE and GLOB functions, which may override previous implementations
    of LIKE and GLOB registered by the application.</p>
}












Pragma checkpoint_fullfsync {
    <p>^(<b>PRAGMA checkpoint_fullfsync
       <br>PRAGMA checkpoint_fullfsync = </b><i>boolean</i><b>;</b></p>
    <p>Query or change the fullfsync flag for [checkpoint] operations.)^
    ^If this flag is set, then the F_FULLFSYNC syncing method is used
    during checkpoint operations on systems that support F_FULLFSYNC. 








>
>
>
>
>
>
>
>
>
>
>








295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319

    significant.  So, for example,
    <b>'a' LIKE 'A'</b> is false but <b>'a' LIKE 'a'</b> is still true.)^</p>

    <p>^This pragma uses [sqlite3_create_function()] to overload the
    LIKE and GLOB functions, which may override previous implementations
    of LIKE and GLOB registered by the application.</p>
}

Pragma cell_size_check {
    <p>^(<b>PRAGMA cell_size_check
       <br>PRAGMA cell_size_check = </b><i>boolean</i><b>;</b></p>
    <p>The cell_size_check pragma enables or disables additional sanity
    checking on database b-tree pages as they are initially read from disk.
    With cell size checking enabled, database corruption is detected earlier
    and is less likely to "spread".  However, there is a small performance
    hit for doing the extra checks and so cell size checking is turned off
    by default.
}

Pragma checkpoint_fullfsync {
    <p>^(<b>PRAGMA checkpoint_fullfsync
       <br>PRAGMA checkpoint_fullfsync = </b><i>boolean</i><b>;</b></p>
    <p>Query or change the fullfsync flag for [checkpoint] operations.)^
    ^If this flag is set, then the F_FULLFSYNC syncing method is used
    during checkpoint operations on systems that support F_FULLFSYNC.
︙︙