On May 27, 2010, at 8:07 PM, Pavel Ivanov wrote:
>> That's true, except for the case when exclusive lock fails; at
>> least that's
>> what Dan Kennedy says to my question from a couple of years ago:
>> http://old.nabble.com/changes-in-cache-spill-locking-since-3.5.9--td20564357.html#a20564357
>
OK, got it. I was referring to the number of decimal points, but yes
round(x,0) does do something
On 5/27/10, Igor Tandetnik wrote:
> Matt Young wrote:
>> Round(x,0) really doesn't exist, it simply does round(x,1)
>
> select round(4.1, 0), round(4.1, 1);
> 4.04.1
>
> --
> Igor Tandetnik
>
>
Matt Young wrote:
> Round(x,0) really doesn't exist, it simply does round(x,1)
select round(4.1, 0), round(4.1, 1);
4.04.1
--
Igor Tandetnik
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sqlite> select round(4.-.5);
4.0
sqlite> select round(4.-0);
4.0
sqlite> select round(4);
4.0
sqlite> select round(4,0);
4.0
sqlite> select round(4,1);
4.0
sqlite> select round(4,2);
4.0
sqlite> select round(4.666,2);
4.67
sqlite>
Round(x,0) really doesn't exist, it simply does round(x,1)
On 5/
Matt Young wrote:
> I second that documentation confusion. There is no truncate to
> integer, though I wish it would.
Somewhat off-topic, but if you want truncation, this would do it: round(x -
0.5) . Well, it's more like floor(), it goes down rather than towards zero
(which makes a difference
I second that documentation confusion. There is no truncate to
integer, though I wish it would.
On 5/27/10, Wilson, Ronald wrote:
> From http://www.sqlite.org/lang_corefunc.html
>
> "The round(X,Y) function returns a string representation of the
> floating-point value X rounded to Y digits to th
This is SQLite 3.6.23.1 compiled with SQLITE_ENABLE_UPDATE_DELETE_LIMIT
(plus a few others, which should not matter to the problem).
The UPDATE ... LIMIT clause works fine when applied to tables, but
suppresses any updates when applied to a view with an update trigger.
Here is some example SQL:
> Error is " error C3861: 'sqlite_open': identifier not found".
Indeed there's no sqlite_open function. There's sqlite3_open. Does it
fixes the problem?
Pavel
On Thu, May 27, 2010 at 11:31 AM, lukasz aaa wrote:
> Hello. Sorry for my English.
> I have a problem with the SQLite library reloaded
> a) There are no other processes or connections accessing this db. There are
> no journals or writing being done to any db across this or any connection.
> Both in the virtual world and the host pc.
You didn't get Roger's words correctly. Although you don't have any
other processes or journal
Hello. Sorry for my English.
I have a problem with the SQLite library reloaded correctly (use in
project). I'm using VC++ 2010 and Dev.
I add to project sqlite3.h, copy to folder with source sqlite3.dll and
sqlite3.lib. I add sqlite3.lib to linker - i search information on
forums, but can't comp
Dear all,
I'm looking to resolve a small problem using like/glob function with indexes
starting from version 3.6.23.1 (It worked with 3.6.13)
Using a where condition such as "WHERE MY_INDEXED_COLUMN LIKE 'X' " ,sqlite
doesn't use the index on that column while it uses the index if I use a
wild
>From http://www.sqlite.org/lang_corefunc.html
"The round(X,Y) function returns a string representation of the floating-point
value X rounded to Y digits to the right of the decimal point. If the Y
argument is omitted, the X value is truncated to an integer."
The documentation above is incorrec
a) There are no other processes or connections accessing this db. There are no
journals or writing being done to any db across this or any connection. Both
in the virtual world and the host pc.
b) Running windows xp pro 32bit in VB. Parent PC is windows 7 ultimate 64 bit.
c) Yes, when the f
On Thu, May 27, 2010 at 3:07 PM, Michael Ash wrote:
> ...These are large tables (52,355 records in facility and 4,085,137 in
> release_cl).
>
> ...
> sqlite> explain query plan
> ...> SELECT name,score
> ...> FROM facility f, (SELECT facilitynumber,SUM(score_rev) AS score
> ...> FRO
> That's true, except for the case when exclusive lock fails; at least that's
> what Dan Kennedy says to my question from a couple of years ago:
> http://old.nabble.com/changes-in-cache-spill-locking-since-3.5.9--td20564357.html#a20564357
It's interesting feature, I didn't know about that. It woul
Pavel,
Thanks for the reply! I was afraid using pcache would be the only way :)
As for this:
Pavel Ivanov-2 wrote:
>
> No way. Cache won't ever grow just because you have large transaction.
> It will only be spilled to disk and exclusive lock will be taken but
> never trigger unbound growth.
> And when the amount of data changed in a single transaction is large enough,
> it would cause either cache spill and exclusive lock on the database, or the
> growth of cache and memory consumption.
No way. Cache won't ever grow just because you have large transaction.
It will only be spilled to
MySql has a much larger default cache than sqlite3. That could be one rather
large difference in performance.
Try increasing sqlite3 cache from it's default of 2000k
PRAGMA cache_size=10;
Or more...
Also...no indexes on media or year? And what does MySql's explain say?
Michael D. Bla
Maybe I'm confused but perhaps you don't understand the pseudo code or I don't
understand your problem. The idea is to process in batches instead of
all-at-once. I don't see where you came up with 1,000,000 inserts as though
the pseudo-code is generating extra insert statements for you. If yo
Michael,
Thank you for your suggestion! The problem with this approach is that N
would not be a constant that we could tune.
As I mentioned, the amount of updates may vary, depending on the data
received.
For example, one piece of data may lead to a single INSERT. So it would be
safe and effec
I am new to sqlite3, converting from mysql.
A query that involves an aggregate function and a join is running
very slowly (taking about 15 seconds compared to mysql where it runs
in <1 second). I've tried two variants of the query (each reprinted
below with the explain query plan), and both are
Hi,
I want find out how to get a foreign key constraint name stored in a sqlite
database. Could you assist me with this problem?
Thank you in advance.
*Damyan Bogoev*
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So only do N many records in one batch. That's the easiest thing. Forget
about the cache and just use responsiveness to adjust how many records you
allow at once.
Pseudo-code:
recnum=0
BEGIN;
while more records
INSERT
recnum++
if (recnum % 1000)
COMMIT;
BEGIN;
One thing to be clear on. What OS are you running in your Virtualbox? I hope
it's not unix-flavored as that could/would be your problem.
Also...you didn't say that read/write worked over the UNC path...only that
read-only failed.
Michael D. Black
Senior Scientist
Northrop Grumman Mission S
I would like each transaction to be as large as possible, but not too large
to cause cache growth or cache spill.
We have a stream of incoming data, with each piece of data causing updates
in SQLite database. The number of rows inserted/updated for each data record
may vary.
If I enclose each da
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