Dan Kennedy, I discovered yesterday that one can use sqlite prepared SQLITE
statements to reduce the CPU and memory utilization of parsing SELECT
statements used to substitute for Sqlite3BTreeMovetoUnpacked and
sqlite3_blob_reopen. Thank you
From: frank_chan...@hotmail.com
To:
Since I'm inserting large files into the DB I'm wondering whether Sqlite
can do compression on the data BLOB by itself
or whether I should do that by programming when creating the BLOB?
--
Christoph Kukulies
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When defining a column TEXT PRIMARY KEY (is that possible on TEXT?),
would this imply uniqueness?
Or would I have to write something like TEXT PRIMARY KEY UNIQUE ?
--
Christoph Kukulies
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On Fri, 02 Mar 2012 10:44:20 +0100, Christoph P.U. Kukulies
k...@kukulies.org wrote:
When defining a column TEXT PRIMARY KEY
(is that possible on TEXT?),
Yes that is possible on any data type.
would this imply uniqueness?
It would.
Or would I have to write something like TEXT PRIMARY
2012/3/2, Christoph P.U. Kukulies k...@kukulies.org:
When defining a column TEXT PRIMARY KEY (is that possible on TEXT?),
Yes.
would this imply uniqueness?
Yes.
Or would I have to write something like TEXT PRIMARY KEY UNIQUE ?
Christoph Kukulies
No. PRIMARY KEY is always UNIQUE.
--
Kit
Am 02.03.2012 10:44, schrieb Christoph P.U. Kukulies:
When defining a column TEXT PRIMARY KEY (is that possible on TEXT?),
yes
would this imply uniqueness?
yes
Or would I have to write something like TEXT PRIMARY KEY UNIQUE ?
no and that doesn't make sense I'd say
[...]
simply
Am 02.03.2012 11:03, schrieb Oliver Peters:
sorry I meant
CREATE TABLE test(
a TEXT PRIMARY KEY
);
(without INTEGER, usually I write INTEGER and not TEXT :-) )
Am 02.03.2012 10:44, schrieb Christoph P.U. Kukulies:
When defining a column TEXT PRIMARY KEY (is that possible on TEXT?),
yes
SQLite does not compress your blob and you will have to do that
programatically. However you can define your own with
sqlite_create_function_v2(): the prototype of your function would be
void compress(sqlite3_context *context, int argc, sqlite3_value **argv)
{
assert(argc==1);
void *data =
On Fri, Mar 2, 2012 at 12:54 PM, Benoit Mortgat mort...@gmail.com wrote:
SQLite does not compress your blob and you will have to do that
programatically. However you can define your own with
sqlite_create_function_v2(): the prototype of your function would be
There's an implementation in
On Fri, Mar 02, 2012 at 10:44:20AM +0100, Christoph P.U. Kukulies scratched on
the wall:
When defining a column TEXT PRIMARY KEY (is that possible on TEXT?),
would this imply uniqueness?
Kind of. It implies uniqueness in the SQL sense, which does not
include NULLs (remember, NULL !=
Hmmm...works for me...
On Windows:
SQLite version 3.7.9 2011-11-01 00:52:41
Enter .help for instructions
Enter SQL statements terminated with a ;
sqlite create table test(a text primary key);
sqlite insert into test values('1');
sqlite insert into test values('1');
Error: column a is not
Hi guys,
i have a problem with the sqlite2.exe under windows.
Ok, I have here 20 corrupted DBs and want to repair they all.
I do this with CMD and the command .dump | sqlite3 rebuild.db3 | sqlite3
rebuild.temp
This works perfect for all DBs except one.
The DB where it is not working has a size
Hello.
(I am Chinese, not good at English. ^_^)
When I compile sqlite3 in VC++6.0, it does not work, but in VS2010 it can work.
It report a runtime errro.
My code as following.
#include stdlib.h
#include string.h
#include stdio.h
#include assert.h
#include sqlite3.h
#include ctype.h
#include
On 2 Mar 2012, at 1:20pm, Steffen Mangold steffen.mang...@balticsd.de wrote:
i have a problem with the sqlite2.exe under windows.
Ok, I have here 20 corrupted DBs and want to repair they all.
I do this with CMD and the command .dump | sqlite3 rebuild.db3 | sqlite3
rebuild.temp
This works
First, get all the other databases done, so you're worried only about the one
which doesn't work.
Then do the .dump part for that database, putting the output into a file on
disk, which should leave you with a huge file of SQL commands which should
rebuild it.
It's likely that the
On Fri, Mar 02, 2012 at 02:21:19PM +0100, Benoit Mortgat scratched on the wall:
On Fri, Mar 2, 2012 at 13:59, Jay A. Kreibich j...@kreibi.ch wrote:
On Fri, Mar 02, 2012 at 10:44:20AM +0100, Christoph P.U. Kukulies
scratched on the wall:
??Kind of. ??It implies uniqueness in the SQL sense,
On 2 Mar 2012, at 2:36pm, Steffen Mangold steffen.mang...@balticsd.de wrote:
I read in some forums that .dumb is the best way to repair malformed DBs.
Do you have an other way?
It doesn't repair anything. And the .dump command may, or may not, work on a
malformed database file. It depends
What is the status of this effort? We actually need to have the platform
determined at runtime since we need to run on WinRT, Android and iOS.
Steve
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Sorry... What effort?
-Original Message-
From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users-
boun...@sqlite.org] On Behalf Of Steven Nesbit
Sent: Friday, March 02, 2012 10:35 AM
To: sqlite-users@sqlite.org
Subject: [sqlite] Status
What is the status of this effort? We
Sorry about that, WinRT Sqlite
Steve
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Hi,
I am looking for some info on how to take an sqlite query result and move
that into a temp table. My hope is to focus the subsequent queries down to
a smaller dataset... I've been searching Google a bit but have not been
able to find what I am loking for... I'm not sure if that means this is
CREATE TEMPORARY TABLE XYZ AS
SELECT ...
Is that what you're looking for?
-Original Message-
From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users-
boun...@sqlite.org] On Behalf Of Joe Bennett
Sent: Friday, March 02, 2012 10:44 AM
To: sqlite-users@sqlite.org
Subject:
Howdy!
Suppose I have two related tables, t1 and t2, and I write a view like this:
CREATE VIEW myview AS SELECT * FROM t1 JOIN t2 USING (some_column);
If I am querying data just from t1, is there a performance penalty for using
myview in the query? Or will the query planner generate
If I am querying data just from t1, is there a performance penalty for using
myview in the query? Or will the query planner generate approximately the
same bytecode as it would if I'd simply queried t1?
Yes, there is performance penalty and no it can't generate the same
bytecode. If you ask
On 2 March 2012 16:23, Duquette, William H (318K)
william.h.duque...@jpl.nasa.gov wrote:
Howdy!
Suppose I have two related tables, t1 and t2, and I write a view like this:
CREATE VIEW myview AS SELECT * FROM t1 JOIN t2 USING (some_column);
If I am querying data just from t1, is there a
On 3/2/2012 11:29 AM, Pavel Ivanov wrote:
If I am querying data just from t1, is there a performance penalty
for using myview in the query? Or will the query planner generate
approximately the same bytecode as it would if I'd simply queried
t1?
Yes, there is performance penalty and no it
What kind of JOIN is used when it a type (INNER, OUTER, etc.) is not specified?
RobR
-Original Message-
From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users-boun...@sqlite.org]
On Behalf Of Duquette, William H (318K)
Sent: Friday, March 02, 2012 11:23 AM
To: Discussion of
Hello
We are new to SQLite and are working on an intro tutorial for people here.
We would like to create an example where we create an SQLite database on our
desktop and access it there via command line, GUI like Navicon, and a web based
application, then upload the .db file to our Android
What kind of JOIN is used when it a type (INNER, OUTER, etc.) is not
specified?
INNER is default.
Pavel
On Fri, Mar 2, 2012 at 11:37 AM, Rob Richardson
rdrichard...@rad-con.com wrote:
What kind of JOIN is used when it a type (INNER, OUTER, etc.) is not
specified?
RobR
-Original
Is there an example(s?) of a step-by-step for moving/using an SQLite .db file
interchangeably between a desktop and an Android mobile device?
What kind of example you want? SQLite's database format is the same
for any platform. So just copy the file (when it's not open by any
application) and
On 3/2/12 8:29 AM, Igor Tandetnik itandet...@mvps.org wrote:
On 3/2/2012 11:29 AM, Pavel Ivanov wrote:
If I am querying data just from t1, is there a performance penalty
for using myview in the query? Or will the query planner generate
approximately the same bytecode as it would if I'd
On 3/2/12 8:31 AM, Simon Davies simon.james.dav...@gmail.com wrote:
On 2 March 2012 16:23, Duquette, William H (318K)
william.h.duque...@jpl.nasa.gov wrote:
Howdy!
Suppose I have two related tables, t1 and t2, and I write a view like
this:
CREATE VIEW myview AS SELECT * FROM t1 JOIN t2
On 3/2/2012 11:38 AM, Duquette, William H (318K) wrote:
On 3/2/12 8:29 AM, Igor Tandetnikitandet...@mvps.org wrote:
On 3/2/2012 11:29 AM, Pavel Ivanov wrote:
If I am querying data just from t1, is there a performance penalty
for using myview in the query? Or will the query planner generate
Someone else in our group came across something called ContentProvider and
is under the impression we have to do some file conversion of the .db file
use ContenProvider somehow if we want to use the original .db file created
on our desktop. Frankly we are not understanding it.
I had assumed we
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When I compile sqlite3 in VC++6.0, it does not work, but in VS2010 it
can work.
http://www.beiww.com/doc/oss/smart-questions.html
Roger
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On 2 Mar 2012, at 4:59pm, Rose, John B jbr...@utk.edu wrote:
Someone else in our group came across something called ContentProvider and
is under the impression we have to do some file conversion of the .db file
use ContenProvider somehow if we want to use the original .db file created
on our
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[I reordered your message in my response]
On 02/03/12 08:59, Rose, John B wrote:
I had assumed we just moved the .db file back and forth between our
desktop and Android and the simplicity is part of the coolness of
SQLite.
Yes, Android includes a
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On 02/03/12 09:40, Simon Slavin wrote:
What ContentProvider is, as far as I can work out, is a way of
accessing a SQLite database file in a form convenient for Android
apps.
No, it is a way for Android app components to expose and manipulate data
On 2 Mar 2012, at 5:58pm, Roger Binns rog...@rogerbinns.com wrote:
On 02/03/12 09:40, Simon Slavin wrote:
What ContentProvider is, as far as I can work out, is a way of
accessing a SQLite database file in a form convenient for Android
apps.
No, it is a way for Android app components to
There's no magic tool for repairing damaged database files. But by using the
.dump command (if necessary on each individual table and view) then creating
a new database file and using the .read command you can often rescue some or
all of the data in the original database.
Ok, with
Ok, with .dumb i now created a db.sql file successfully.
but I don't get the read command!? How create a new DB file with that command?
With sqlite .read db.sql it does much reading but no file is created.
Ok I get it, must attach a DB first.
now sqlite writes the data to the DB, hopes this
On 2 Mar 2012, at 6:16pm, Steffen Mangold steffen.mang...@balticsd.de wrote:
There's no magic tool for repairing damaged database files. But by using
the .dump command (if necessary on each individual table and view) then
creating a new database file and using the .read command you can
Are you saying it creates a database file but doesn't put anything into it
(zero filesize) or that it doesn't even create a blank file ?
With dump its write the complete DB File new but nearly at the end (new DD file
size compared to the malformed) Sqlite shell breaks and set the file size
Steven Nesbit wrote:
What is the status of this effort? We actually need to have the
platform determined at runtime since we need to run on WinRT,
Android and iOS.
I'm not really following you here... Those are completely different
platforms.
--
Joe Mistachkin
On 2 Mar 2012, at 6:30pm, Steffen Mangold steffen.mang...@balticsd.de wrote:
Are you saying it creates a database file but doesn't put anything into it
(zero filesize) or that it doesn't even create a blank file ?
With dump its write the complete DB File new but nearly at the end (new DD
Is it very long ? Can you read it with a dump utility or a text editor
(don't try it with a word processor) and see the SQL commands in it ?
Yes 14 GB. 4 Table, roundabout 200.000.000 inserts.
I opened it with a textviewer for large files. Sql seams well formed and
readable till the end.
Thanks for the very thorough reply.
Android is a red herring in this and your approach is not a good one. How
would you do this using two different regular computers? How would you
deal with changes being made on both machines at the same time? How would
you copy databases ensuring you
Ok maybe i found it in the sql file is written (file end):
[...]
INSERT INTO InverterData VALUES(2478,'2012-02-28
15:00:00',1435.73,429173.78,170.28,170.75,169.38,397.56,397.38,396.69,NULL,210976,31,NULL,NULL,1,304,NULL,NULL,NULL,694,NULL,NULL,NULL);
/ ERROR: (11) database disk image is
On 2 Mar 2012, at 6:55pm, Rose, John B jbr...@utk.edu wrote:
Thanks for the very thorough reply.
Android is a red herring in this and your approach is not a good one. How
would you do this using two different regular computers? How would you
deal with changes being made on both machines
On 2 Mar 2012, at 7:08pm, Steffen Mangold steffen.mang...@balticsd.de wrote:
Ok maybe i found it in the sql file is written (file end):
[...]
INSERT INTO InverterData VALUES(2478,'2012-02-28
So once again, how would you answer Roger's question ? Suppose changes were
made on both computers at the same time. How would you reconcile the two
copies of the databases ? If you want to use the copy from the computer to
/update/ the copy in the mobile device then the mobile device needs
On 2 Mar 2012, at 7:40pm, Rose, John B jbr...@utk.edu wrote:
So once again, how would you answer Roger's question ? Suppose changes were
made on both computers at the same time. How would you reconcile the two
copies of the databases ? If you want to use the copy from the computer to
Hello
I suspect my question may already have been answered many times before, but I
could not find a way to search through the archives of the sqlite users mailing
list at: http://sqlite.org:8080/cgi-bin/mailman/private/sqlite-users/. Is there
a way to search the archives?
My question is:
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On 02/03/12 10:55, Rose, John B wrote:
In this particular example, a particular researcher would be creating
the initial version of the database on their own computer, but once
they got out in the field they may update the copy they have on their
Hi,
Is it possible to create a managed library with custom SQLite functions (based
on System.Data.SQLite.SQLiteFunction class) and load it into sqlite3.exe
command shell (using .load command) for ease of testing and visual data
examination?
Thanks,
- Levi
--
--
--
--ô¿ô--
K e V i N
On Fri, Mar 2, 2012 at 2:47 PM, Agrawal, Manish magra...@usf.edu wrote:
My question is: what is the simplest way to replace the connection string
in a C# application with the file location at runtime? I do want the
convenience of the
WHAT THE !
I now delete the malform message and the rollback command from the *.sql file
and run .read.
Sqlite shell runs complete and the shell ask me for new command (DB file
seems to have the right size.
I'm happy now and enter command .exit and bam Db file has 0kb?!?!?
What have i
That's a wrong approach. First, you don't need to modify functions in
SQLite code, you need to create your own. Your function will convert
using locale saved in some variable in your application.
I have created my own function which uses a global variable for the
default locale. (see
On 3/2/2012 5:45 PM, Steffen Mangold wrote:
WHAT THE !
I now delete the malform message and the rollback command from the *.sql file and run
.read.
Sqlite shell runs complete and the shell ask me for new command(DB file
seems to have the right size.
I'm happy now and enter command
If you have a BEGIN command in your script, then you should also have END or
COMMIT at the end (the two are synonyms).
can i do this by shell command after .read if my SQL script has miss that?
Steffen
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I have created my own function which uses a global variable for the default
locale. (see attached)
I guess I received your attachment because you sent this email to me
directly but generally this list doesn't allow attachments - you
should include your code into email.
And about your code: I
On 3/2/2012 5:57 PM, Steffen Mangold wrote:
If you have a BEGIN command in your script, then you should also have END or
COMMIT at the end (the two are synonyms).
can i do this by shell command after .read if my SQL script has miss that?
You should be able to, yes. Just type in END;
I just grabbed the 3.7.10 amalgamation source and built it, but have run into
an issue where DISTINCT doesn't appear to actually return distinct values on a
table that includes a UNIQUE clause. It unexpectedly returns duplicates
instead.
My build environment is:
- Mac OS X 10.6.8
- Xcode
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On 02/03/12 14:45, Steffen Mangold wrote:
I'm happy now and enter command .exit and bam Db file has 0kb?!?!?
What have i done wrong? Any Commit command or something?
What you don't seem to understand is that your original database is
corrupt. The
You should be able to, yes. Just type in END; (without quotes, but with
semicolon).
Ok thank you i will try :) (in a few hours because DB is so big. :)
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On 02/03/12 15:32, Steffen Mangold wrote:
how to replace this?
Change the abort to commit as others pointed out. The dump code does the
following:
print BEGIN
foreach table in the database:
foreach row in the table:
print the row
print
On 2 Mar 2012, at 10:45pm, Steffen Mangold steffen.mang...@balticsd.de wrote:
I now delete the malform message and the rollback command from the *.sql file
and run .read.
Okay ...
Sqlite shell runs complete and the shell ask me for new command (DB file
seems to have the right size.
Steven Russell wrote:
I just grabbed the 3.7.10 amalgamation source and built it, but have run into
an issue where DISTINCT doesn't appear to actually return distinct values on a
table that includes a UNIQUE clause. It unexpectedly returns duplicates
instead.
My build environment is:
- Mac
On 3 Mar 2012, at 12:29am, Larry Brasfield larry_brasfi...@iinet.com wrote:
That's approaching a pretty good bug report. However, I would suggest a
little more to promote a resolution of this problem. You do not state the
compilation options. Optimization settings and preprocessor
On 3 Mar 2012, at 12:29am, Larry Brasfield larry_brasfield at iinet.com wrote:
That's approaching a pretty good bug report. However, I would suggest a
little more to promote a resolution of this problem. You do not state the compilation
options. Optimization settings and preprocessor
On 3 Mar 2012, at 12:46am, Larry Brasfield larry_brasfi...@iinet.com wrote:
On 3 Mar 2012, at 12:29am, Larry Brasfield larry_brasfield at iinet.com
wrote:
That's approaching a pretty good bug report. However, I would suggest a
little more to promote a resolution of this problem. You
Simon Slavin wrote and quoted:
Would the output of 'PRAGMA compile_options;' be sufficient ?
That's a cute and useful feature I had forgotten. It would be sufficient to
show the preprocessor variable values that were in effect as the amalgamation was
compiled. However, for something that
Thanks very much. After trying many of the suggestions among the search
results, the solution that worked was:
http://social.msdn.microsoft.com/Forums/fi-FI/wpf/thread/b7d8a3dd-031e-481f-94b7-919373c61f4b
The only problem is that the settings.designer.cs file seems to be
auto-generated,
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On 02/03/12 15:20, Steven Russell wrote:
I obviously don't expect the duplicate results here. If you create the
table without the UNIQUE clause, then the results are as expected (1
and 2 both only show up once).
BTW the team agreed it was a bug,
Could someone throw some light on this issue too?
Sreekumar
On Mar 2, 2012 10:05 AM, Sreekumar TP sreekumar...@gmail.com wrote:
The backtrace
===
Program received signal SIGSEGV, Segmentation fault.
0x2b657288 in sqlite3Parser (yyp=0x2d401e40, yymajor=119, yyminor=...,
On 03/03/2012 10:30 AM, Sreekumar TP wrote:
Could someone throw some light on this issue too?
I can't see from the stack trace why this is crashing.
Does it crash if you run the query from the sqlite shell?
Maybe try building the shell without optimizations, and
then running it under
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