Hi all:
I´m using SQLite amalgamation in various exe files with Visual Studio
2005.
In debug mode the exe files are very slow and have high CPU usage.
In release the problem dissapears.
Is there some option in SQLite to avoid this problem?
Thank you very much in advance.
Juan Perez wrote:
Hi all:
I'm using SQLite amalgamation in various exe files with Visual Studio
2005.
In debug mode the exe files are very slow and have high CPU usage.
In release the problem dissapears.
Is there some option in SQLite to avoid this problem?
You can change
Grab the lock and never let go:
http://sqlite.org/pragma.html#pragma_locking_mode
-j
That was exactly what I needed. I tried with file open flag
SQLITE_OPEN_EXCLUSIVE
before, but that seems to be something else.
40% faster now. Thanks a lot!
Hi,
According to the documentation on SELECT statements
http://www.sqlite.org/lang_select.html
It seems possible to write join chains as A join (B join C). (using a '('
join-source ')' single-source )
But on the well known NorthwindEF database this query ...
SELECT Orders.OrderID
FROM
On 19 Mar 2012, at 12:03pm, TAUZIN Mathieu mtau...@cegid.fr wrote:
Or without subjoin...
SELECT Orders.OrderID
FROM Customers
INNER JOIN Orders
ON Customers.CustomerID = Orders.CustomerID
LEFT OUTER JOIN InternationalOrders
ON Orders.OrderID =
Thanks for your response but my intent was to give rise to either an bug on
SQLite engine or an error (or maybe lack of precision) in the documentation.
The sample I gave is a simplified version of the real query which is built by a
tool so I have not the choice on the form.
Mathieu.
According to the documentation on SELECT statements
http://www.sqlite.org/lang_select.html
It seems possible to write join chains as A join (B join C). (using a '('
join-source ')' single-source )
...
It seems that parsing is ok (no syntax error) but sources in the sub join
can't be used
On 19 Mar 2012, at 12:51pm, TAUZIN Mathieu mtau...@cegid.fr wrote:
Thanks for your response but my intent was to give rise to either an bug on
SQLite engine or an error (or maybe lack of precision) in the documentation.
SQLite is fine. The documentation is accurate about what SQLite does.
On 19 March 2012 13:05, Pavel Ivanov paiva...@gmail.com wrote:
According to the documentation on SELECT statements
http://www.sqlite.org/lang_select.html
It seems possible to write join chains as A join (B join C). (using a '('
join-source ')' single-source )
...
It seems that parsing is
Thanks,
This syntax works but it is not documented... it looks like a short hand for a
subquery, interesting !.
Mathieu
-Message d'origine-
De : sqlite-users-boun...@sqlite.org [mailto:sqlite-users-boun...@sqlite.org]
De la part de Simon Davies
Envoyé : lundi 19 mars 2012 14:24
À :
On Mon, Mar 19, 2012 at 10:02 AM, TAUZIN Mathieu mtau...@cegid.fr wrote:
Thanks,
This syntax works but it is not documented... it looks like a short hand for
a subquery, interesting !.
Join sources are like sub-queries. Look at the syntax.
A sub-select specified in the join-source
Hello Juan,
Debug mode is unusable for production code. Even it you add
optimization, MS builds in a debug memory allocator/deallocator that's
at least 10 times slower than the regular memory allocator. Running my
application under debug, the memory allocations completely dominate
On Mon, Mar 19, 2012 at 12:03:44PM +, TAUZIN Mathieu scratched on the wall:
Hi,
According to the documentation on SELECT statements
http://www.sqlite.org/lang_select.html
It seems possible to write join chains as A join (B join C).
(using a '(' join-source ')' single-source )
But on
Thanks for your support !
SQL Ansihttp://savage.net.au/SQL/sql-99.bnf.html#qualified%20join (and every
major DB
SqlServerhttp://msdn.microsoft.com/en-US/library/ms177634(v=sql.90).aspx,
Oraclehttp://docs.oracle.com/cd/B13789_01/server.101/b10759/statements_10002.htm)
supports this syntax as
On 19/03/2012 12:07 PM, TAUZIN Mathieu wrote:
Thanks for your support !
SQL Ansihttp://savage.net.au/SQL/sql-99.bnf.html#qualified%20join (and every major DB
SqlServerhttp://msdn.microsoft.com/en-US/library/ms177634(v=sql.90).aspx,
Alexander,
Just curious, how do you call Backup API from .NET (if you do)? AFAIK it's not
accessible through System.Data.SQLite.dll. Did you have to compile SQLite
separately from c sources?
Thank you,
- Levi
- Original Message -
From: sqlite-users@sqlite.org
To:
Hello,
My query wont use the R-Tree index if I provide an ORDER BY clause and
performance degrades considerably. Obviously I can work around with by
making the R-Tree query a subquery and sorting the results, but would
like to know why this is necessary? I've done an VACUUM and ANALYZE.
REGEXP requires definition of regexp()
we seem to require C to do this:
http://www.sqlite.org/lang_expr.html#regexp
or
apparently there is a sqlite3-pcre which adds
/usr/lib/sqlite3/pcre.so
and that does the trick.
however, sqlite3-pcre doesn't seem to exist on debian.
what is the
prad p...@towardsfreedom.com writes:
REGEXP requires definition of regexp()
we seem to require C to do this:
http://www.sqlite.org/lang_expr.html#regexp
or
apparently there is a sqlite3-pcre which adds
/usr/lib/sqlite3/pcre.so
and that does the trick.
however, sqlite3-pcre doesn't
19 matches
Mail list logo
