, 2009, at 3:53 AM, Simon Slavin wrote:
(Sorry, hit 'Send' before I meant to.)
On 6 Jul 2009, at 6:34am, James Gregurich wrote:
a question for the sqlite developers.
The inability of INSERT OR REPLACE to maintain referential
integrity
leaves me with no mechanism to implement a feature
On Jul 6, 2009, at 1:15 PM, Simon Slavin wrote:
Please quote previous text above your response to it. We read English
top to bottom.
On 6 Jul 2009, at 8:22pm, James Gregurich wrote:
On Jul 6, 2009, at 3:53 AM, Simon Slavin wrote:
It should not call DELETE triggers since it never deletes
based on the test I just ran, it reports the first one encountered only.
On Jul 6, 2009, at 2:53 PM, Nicolas Williams wrote:
On Sat, Jul 04, 2009 at 10:24:50AM +0200, Kees Nuyt wrote:
On Fri, 03 Jul 2009 14:38:43 -0700, James Gregurich
bayouben...@mac.com wrote:
nuts. that makes INSERT
On Jul 6, 2009, at 3:14 PM, Nicolas Williams wrote:
On Mon, Jul 06, 2009 at 02:49:07PM -0700, James Gregurich wrote:
1) Why on earth would you want to scroll all the way to the bottom of
a long email to get the response simply for the sake of We read
English top to bottom.
Any quoted
a question for the sqlite developers.
The inability of INSERT OR REPLACE to maintain referential integrity
leaves me with no mechanism to implement a feature in my project that
I was intending to provide. Are there any plans to add in the
functionality for INSERT OR REPLACE to call delete
question:
How do I maintain referential integrity on a INSERT OR REPLACE given
it does not call the delete trigger on the offending rows?
thanks,
james
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I read on another posting in the archives that it does not. However, I
haven't tried it myself.
-James
Simon Slavin
Fri, 03 Jul 2009 09:44:22 -0700
On 3 Jul 2009, at 3:28am, James Gregurich wrote:
How do I maintain referential integrity on a INSERT OR REPLACE given
it does not call
nuts. that makes INSERT OR REPLACE worthless if you have tables
dependent on one another.
Is there any way to manually get a list of records for which there
would be a conflict if a given record was inserted?
On Fri, 03 Jul 2009 11:29:14 -0700, James Gregurich
bayouben...@mac.com wrote
)
THEN RAISE(ABORT, 'no parent element')
END;
END;
COMMIT;
sqlite INSERT INTO test1b VALUES(1,10,20);
SQL error: no parent element
sqlite
On Jul 1, 2009, at 6:40 PM, Simon Slavin wrote:
On 2 Jul 2009, at 1:57am, James Gregurich wrote:
I tried that, but I still got back constraint failed rather
howdy!
Would there be a way to identify the offending constraint if
SQLITE_CONSTRAINT is returned?
sqlite3_errmsg is just telling me constraint failed...which is of
limited usefulness.
-James
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How would I have hijacked a thread? I changed the subject and
removed the original text.
On Jul 1, 2009, at 12:32 PM, Roger Binns wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
James Gregurich wrote:
howdy!
You hijacked someone else's thread by hitting reply, rather than
ah. I have no knowledge of how mailing list programs work. no poor
etiquette was intended.
On Jul 1, 2009, at 1:41 PM, P Kishor wrote:
On Wed, Jul 1, 2009 at 3:39 PM, James Gregurichbayouben...@mac.com
wrote:
How would I have hijacked a thread? I changed the subject and
removed the
thanks.
I tried that, but I still got back constraint failed rather than my
RAISE message. Since you say it should work, I probably did something
wrong. I'll look at it again.
On Jul 1, 2009, at 3:59 PM, Simon Slavin wrote:
On 1 Jul 2009, at 8:19pm, James Gregurich wrote:
Would
thanks!
On Jun 18, 2009, at 6:01 PM, Dennis Cote wrote:
James Gregurich wrote:
on that update statement, is the SQL optimizer smart enough to not
rerun that select statement for each column in the update's set
clause? Is it going to run a single select statement to get value1,
value2, etc
Dennis,
question on an old post of yours below...
on that update statement, is the SQL optimizer smart enough to not
rerun that select statement for each column in the update's set
clause? Is it going to run a single select statement to get value1,
value2, etc. or is it going to run one
So what are you going to do? we need to get your plans pinned down.
On Jun 17, 2009, at 11:46 AM, James Gregurich wrote:
Dennis,
question on an old post of yours below...
on that update statement, is the SQL optimizer smart enough to not
rerun that select statement for each column
oops. sorry for errant message, folks. I had the wrong email selected
when I hit the button and didn't pay attention to what I was doing.
On Jun 17, 2009, at 3:19 PM, James Gregurich wrote:
So what are you going to do? we need to get your plans pinned down.
On Jun 17, 2009, at 11:46 AM
howdy!
Questions:
suppose tables t1 t2 exits in two separate db files, d1 d2
respectively. t1 t2 have identical schemas, but different data.
I want to append t2 to t1.
I suppose the way to do that is to open a connect to d1, use the
attach command to reference d2.t2 and issue a
in an
uncontrollable environment (i.e. a consumer desktop computer) when I
can just use NSOperation, boost::thread, and boost::mutex to build a
single-process solution that shares data in a normal way between tasks?
James Gregurich
Engineering Manager
Markzware
On Apr 29, 2009, at 11:23 PM
. There are no facts in
science,
only observations and any hypothesis is only valid until a better one
replaces it.
You describe bad, politicized science.
James Gregurich wrote:
With all due respect, science itself is a set of
positions (opinions) which are endorsed by small group of people
threaded programs are inherently doomed to be ill-conceived. The
development tools and techniques for building concurrent systems are
advancing and making concurrency quite feasible.
James Gregurich
Engineering Manager
Markzware
On Apr 30, 2009, at 5:01 AM, John Stanton wrote:
A position
in an
uncontrollable environment (i.e. a consumer desktop computer) when I
can just use NSOperation, boost::thread, and boost::mutex to build a
single-process solution that shares data in a normal way between tasks?
James Gregurich
Engineering Manager
Markzware
On Apr 29, 2009, at 11:23 PM
, at 4:37 PM, Roger Binns wrote:
James Gregurich wrote:
So, you suggest I should build a commercial desktop application (for
processing print-industry files and presenting them in a UI) in such
a way that it spawns multiple processes and communicates with them
via
the filesystem or IPC
howdy!
question:
for an in-memory db with the threading mode set to serialized, is the
internal mutex held for an entire transaction so that one thread won't
access the db while another one is in the middle of a transaction with
multiple insert statements?
thanks for any info.
James
is a major part of that effort. As I
understand it, MS is developing their copy of NSOperation for VS2010.
The development landscape is only going to get more threaded as time
goes on.
-James
On Apr 29, 2009, at 10:03 PM, James Gregurich wrote:
howdy!
question:
for an in-memory
interesting. thanks for the tip.
Ill give it some consideration.
-James
On Apr 21, 2008, at 1:07 :50PM, Scott Hess wrote:
If you create a file on disk and set PRAGMA synchronous = OFF, you
should get pretty close to the performance of a shared in-memory
database on most modern desktop
for those who may be interested:
I ran a test with SQLite version: 3.5.8
I tried the scheme described earlier with each thread sharing a
connection but writing into its own attached in-memory db on that
connection. Didn't work. all but the first writer thread failed with
a SQLITE_ERROR
.
Actually, CoreData is what I intended to use at first. However, I have
explored the possibility of directly using SQLite instead to keep my
document readers and their data management cross-platform.
On Apr 20, 2008, at 8:31 AM, Dennis Cote wrote:
James Gregurich wrote:
I think I will go
on simultaneously
on the same connection but each insert operation going into a
different attached in-memory db.
On Apr 19, 2008, at 9:20 AM, Dan wrote:
On Apr 19, 2008, at 6:06 AM, James Gregurich wrote:
I'll ask this question. The answer is probably no, but I'll ask it
for the sake
-writers locks strategies, etc...
On Sat, Apr 19, 2008 at 2:29 PM, James Gregurich [EMAIL PROTECTED]
wrote:
oh good! That isn't the version that ships with Leopard, but I can
live with deploying my own version as part of my app.
Will l get the writer parallelism I'm after as long as each thread
to
that filename and registered in this map.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of James Gregurich
Sent: sábado, 19 de abril de 2008 17:02
To: General Discussion of SQLite Database
Subject: Re: [sqlite] multiple writers for in-memory datastore
I
. Is there a
way to attach an existing in-memory store to another in-memory store?
If not, how hard would it be to modify the sqlite source to allow such
an attachment to be made given the two connection pointers to two
independent stores?
thanks,
James Gregurich
If the sqlite statement had a temporary storage area so that I could
load up a bunch of rows and then commit them in one shot so that the
lock on the db was not held very long by a single transaction, that
would probably work.
However, my reading of the documentation leads me to believe
full concurrency on my writer tasks until
they are ready to flush their results to the disk file? As I
understand it, the attached db won't be locked by reading done on the
disk file.
thanks,
James
On Apr 18, 2008, at 10:33 :39AM, Dennis Cote wrote:
James Gregurich wrote:
If the sqlite
On Apr 18, 2008, at 1:25 :36PM, Dennis Cote wrote:
James Gregurich wrote:
suppose I create a temporary db file on disk. Each task ( a thread)
opens a connection to the temp file and attaches an in-memory db to
it.
You will have to open the memory database and attach the db file since
On Apr 18, 2008, at 2:33 :32PM, Dennis Cote wrote:
To share an attached database the threads must be able to name it, and
this is only possible with a file database.
you could change the open() function to be able to assign a name to an
in-memory db and then keep a mapping of all the names
I'll ask this question. The answer is probably no, but I'll ask it
for the sake of completeness.
Suppose I created an in-memory db. I use the attach command to
associate an additional in-memory db. Suppose I assign the main db to
thread 1 and the associated db to thread 2. Can I share the
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