Ever-since you suggested to me to change the default page size to 4096, a
few years back, I have always set my default to that size.
jos?
-Original Message-
From: Richard Hipp
Sent: Friday, March 04, 2016 10:48 AM
To: General Discussion of SQLite Database ; sqlite-dev
Subject:
Thanks,I have set a value for the blob.Then sqlite3_blob_open returns
SQLITE_OK.Then I use sqlite3_blob_write to update the blob.I notice that.It
must have enough capacity to hold the writes.
2016-03-04
zhangkai.gis
Hi,
I have used sqlite3VarintLen outside of SQLite and noticed that the
assertion in this function is hit if the highest bit is set (and it
returns 10 when it should return 9). E.g. with
sqlite3VarintLen(0xF000);
It could be that this is not relevant to SQLite as it is guaranteed
On 3/4/16, tonyp at acm.org wrote:
> I ran some tests and almost all of my databases (about 100 of them with
> different content mix and with the biggest one being around 500MB) inflated
Can you run sqlite3_analyzer on some of your databases and send me the output?
>
> by a lot while only a
I use the C API.
I think it is not possible to get the hole call stack if continue using the
released SQLite pointer.
???:Simon Slavinslavins at bigfraud.org
???:SQLite mailing listsqlite-users at mailinglists.sqlite.org
:2016?3?4?(??)?17:50
??:Re: [sqlite] SQLite Corruption By Writing
On Fri, Mar 4, 2016 at 4:48 PM, Richard Hipp wrote:
> https://www.sqlite.org/draft/releaselog/3_12_0.html
- from 2000 to -2000
+ from 2000 to 500
[OT] The PRAGMA defer_foreign_keys=ON statement now also disables RESTRICT
actions on foreign key.
I've confused by that Richard. Does that
On Fri, Mar 4, 2016 at 4:45 PM, Eric Grange wrote:
> [...] why can't we both have our cake and eat it? :)
>
Exactly. That's why I've been asking/advocating for out-of-row (large)
blobs for a while now.
See for example
http://permalink.gmane.org/gmane.comp.db.sqlite.general/97686. --DD
On 2016/03/03 2:55 AM, Sam Carleton wrote:
> I am working on a trigger that only needs to be fired when the value for
> the column 'Selected' is 1. How exactly do I write that trigger? Here is
> what I have come up with:
>
> CREATE TRIGGER IF NOT EXISTS tu_Favorite_add_to_SlideShowImage AFTER
Thanks for all the details!
I was already storing the really large blobs in their own tables.
However I will have to review the situations for smallish blobs (about as
large as the rest of the fields in a record), as moving them to another
table would halve the number of pages involved for
On 2016/03/04 4:29 PM, Paul van Helden wrote:
> On Fri, Mar 4, 2016 at 4:23 PM, Igor Tandetnik wrote:
>
>> On 3/4/2016 9:15 AM, Paul van Helden wrote:
>>
>>> So I have to detect integers in order to avoid the .0
>>>
>> WHERE CAST(A as integer) = 1
>>
>>
> Not quite going to work either. I
On Fri, Mar 4, 2016 at 4:23 PM, Igor Tandetnik wrote:
> On 3/4/2016 9:15 AM, Paul van Helden wrote:
>
>> So I have to detect integers in order to avoid the .0
>>
>
> WHERE CAST(A as integer) = 1
>
>
Not quite going to work either. I should have said the values are _nearly_
always integers, but
I am debugging db corruption. After I get some corrupted db, I found that they
all corrupted by writing null data.
So, I decide to add some check and dump call stackin the source code in order
to find out who corrupts the db.
Here is the code I added in the source code.
int
Hi Richard,
Thank you for the quick reply. I cannot change the type of the column. The
tables are user defined and need to be matched with other user defined
tables. The values are always integers but can be in any type of column.
So I have to detect integers in order to avoid the .0 How do
On 4 Mar 2016, at 4:02pm, Tim Uy wrote:
> So Richard, theoretically, if you use negative numbers, you can get another
> x2?
Tim,
are you actually considering attaching lots of databases at once ? This is a
terrible idea. Every time you refer to an attached database SQLite has to find
it.
On 3/4/16, Martin Raiber wrote:
> Hi,
>
> I have used sqlite3VarintLen outside of SQLite and noticed that the
> assertion in this function is hit if the highest bit is set (and it
> returns 10 when it should return 9). E.g. with
>
> sqlite3VarintLen(0xF000);
>
> It could be that this
Hi All,
CREATE TABLE test (A TEXT);
INSERT INTO test VALUES ('1');
SELECT * FROM test WHERE A=1; // returns 1
SELECT * FROM test WHERE A=1.0; // returns nothing
How is the second comparison done?
I realize that you can have double values that are too large to convert to
int64, but as I
zhangkai wrote:
> insert into device(ieee) values(12345);
> int ret = sqlite3_blob_open(db,
> "main",
> "device",
> "endpoint",
> 12345,
> 1,
> );
The documentation says:
| This function fails ... if
Sam Carleton wrote:
> I am working on a trigger that only needs to be fired when the value for
> the column 'Selected' is 1. How exactly do I write that trigger? Here is
> what I have come up with:
>
> ... WHEN (NEW.Selected = 1) ...
Looks OK. What is the problem with that?
Regards,
Clemens
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Hash: SHA1
On 04/03/16 07:48, Richard Hipp wrote:
> The tip of trunk (3.12.0 alpha) changes the default page size for
> new database file from 1024 to 4096 bytes. ... This seems like a
> potentially disruptive change, so I want to give you, the user
> community,
On 3/4/16, Tim Uy wrote:
>
> Re: below, what happens if I change the sqlite3_limit to 10 when I have 20
> attached. Will it complain?
No. It just won't let you ATTACH new databases until you DETACH
enough to get the count down below 10.
--
D. Richard Hipp
drh at sqlite.org
On 2016/03/04 10:35 AM, Darren Duncan wrote:
> On 2016-03-03 11:27 AM, James K. Lowden wrote:
>>
>> You say, "record ... the condition ... to scroll [the table]". I'm
>> sure I don't know what "condition" you mean.
>>
>> You appear to be doing something like:
>>
>> offset = 0
>> do
>>
On 3/4/16, Dominique Devienne wrote:
>
> [OT] The PRAGMA defer_foreign_keys=ON statement now also disables RESTRICT
> actions on foreign key.
>
> Does that mean handling of the RESTRICT is
> also postponed to commit-time,
> or that RESTRICT is not honored in deferred FK mode (and thus violating
sanhua.zh wrote:
> I am debugging db corruption. After I get some corrupted db, I found that
> they all corrupted by writing null data.
>
> 0x1000f8000 + 2778664 sqlite3KnownError,main.c,line 3192
> 0x1000f8000 + 2554560 unixWrite,os_unix.c,line 3335
> 0x1000f8000 + 2821984
The tip of trunk (3.12.0 alpha) changes the default page size for new
database file from 1024 to 4096 bytes.
https://www.sqlite.org/draft/releaselog/3_12_0.html
https://www.sqlite.org/draft/pgszchng2016.html
This seems like a potentially disruptive change, so I want to give
you, the user
>
> Does this trigger not compute, is not accepted, or does not work once
> installed? What is the problem exactly?
>
It works fine. Initially I was not able to find any good examples of a
conditional trigger but after a lot more searching I was able to find one
that validated that it might
On 4 Mar 2016, at 8:22am, sanhua.zh wrote:
> 3. I guess it could be a problem of operating system. I work on iOS, but I
> have no any further idea.
Almost all of these problems are caused by your program doing one of these
A) Writing its own data into a pointer made by SQLite
B) Releasing a
On 3/4/2016 9:29 AM, Paul van Helden wrote:
> On Fri, Mar 4, 2016 at 4:23 PM, Igor Tandetnik wrote:
>
>> On 3/4/2016 9:15 AM, Paul van Helden wrote:
>>
>>> So I have to detect integers in order to avoid the .0
>>>
>>
>> WHERE CAST(A as integer) = 1
>>
>>
> Not quite going to work either. I should
On 3/4/2016 9:15 AM, Paul van Helden wrote:
> So I have to detect integers in order to avoid the .0
WHERE CAST(A as integer) = 1
--
Igor Tandetnik
On 3/4/16, Paul van Helden wrote:
> Hi All,
>
> CREATE TABLE test (A TEXT);
> INSERT INTO test VALUES ('1');
> SELECT * FROM test WHERE A=1; // returns 1
> SELECT * FROM test WHERE A=1.0; // returns nothing
Because column A has type TEXT, the RHS of the = is converted to text
and a text
Dear Richard,
Re: below, what happens if I change the sqlite3_limit to 10 when I have 20
attached. Will it complain? Can I shift the limit back and forth over time?
Thanks,
Tim
"The maximum number of attached databases can be lowered at run-time using
the sqlite3_limit
Well, probably only like a dozen, no worries.
On Fri, Mar 4, 2016 at 8:07 AM, Simon Slavin wrote:
>
> On 4 Mar 2016, at 4:02pm, Tim Uy wrote:
>
> > So Richard, theoretically, if you use negative numbers, you can get
> another
> > x2?
>
> Tim,
>
> are you actually considering attaching lots of
(or use unsigned)
On Fri, Mar 4, 2016 at 8:02 AM, Tim Uy wrote:
> So Richard, theoretically, if you use negative numbers, you can get
> another x2?
>
> On Thu, Mar 3, 2016 at 2:07 PM, Tim Uy wrote:
>
>> (Thanks Richard for the explanation of "main" and "temp".)
>>
>> On Thu, Mar 3, 2016 at
So Richard, theoretically, if you use negative numbers, you can get another
x2?
On Thu, Mar 3, 2016 at 2:07 PM, Tim Uy wrote:
> (Thanks Richard for the explanation of "main" and "temp".)
>
> On Thu, Mar 3, 2016 at 2:02 PM, Tim Uy wrote:
>
>> So comment in sqliteLimit just needs an update?
>>
On 2016-03-03 11:27 AM, James K. Lowden wrote:
> On Thu, 3 Mar 2016 10:43:26 +0800 (CST)
> ?? wrote:
>
>>> Can anyone describe a situation for which this style of LIMIT &
>>> OFFSET is advisable from the application's point of view? (The
>>> DBMS costs are obvious enough.)
>>
>> For me this is
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