... SELECT b FROM mytable WHERE b = c will give you each row of the
database which has identical b and c values.
... SELECT b FROM mytable AS m2 WHERE m2.b = m1.c will join the two views
of the database together, so if mytable contains
b,c
1,2
2,3
the combined table for this subquery looks like:
I get a lot of inquiries like this from windows users. They get some kind
of dialog box about an SQLite3.dll not being found or being out-of-date.
It might be good to create a webpage of some sort to try to help them, but
I don't know what to put on that webpage. Does anybody have any
Here is another example of the kind of email I get on a regular basis.
Note that I also get phone calls about this. Sometimes at odd hours.
-- Forwarded message --
From: Åke Halvarson baseboll-lag...@telia.com
Date: Tue, Dec 4, 2012 at 5:22 AM
Subject: sqlite.dll
To:
On 4 Dec 2012, at 10:42am, Richard Hipp d...@sqlite.org wrote:
I get a lot of inquiries like this from windows users. They get some kind
of dialog box about an SQLite3.dll not being found or being out-of-date.
It might be good to create a webpage of some sort to try to help them, but
I
(Yes, I know I should be preparing and binding for security reasons, but that
doesn't work here.)
What is the result when using _exec() on multiple statements when one of the
statements errors ? I read this page:
http://www.sqlite.org/c3ref/exec.html
and I can't figure out whether execution
On 4 December 2012 11:02, Simon Slavin slav...@bigfraud.org wrote:
(Yes, I know I should be preparing and binding for security reasons, but that
doesn't work here.)
What is the result when using _exec() on multiple statements when one of the
statements errors ? I read this page:
On 4 Dec 2012, at 11:13am, Simon Davies simon.james.dav...@gmail.com wrote:
3rd paragraph:
If an error occurs while evaluating the SQL statements passed into
sqlite3_exec(), then execution of the current statement stops and
subsequent statements are skipped.
Dammit. Missed it. Thanks.
It's not easy being an incon smile
On 4 December 2012 10:44, Richard Hipp d...@sqlite.org wrote:
Here is another example of the kind of email I get on a regular basis.
Note that I also get phone calls about this. Sometimes at odd hours.
-- Forwarded message --
From: Åke
@Richard;
What kind of support are you supposed to be giving users? sqlite3.dll is a
DLL, not an application, and without looking at the source code, I know for
certain the DLL itself isn't asking someone to download something else,
ASSUMING of course, its a precompiled version from sqlite.org
Von: Hick Gunter
Gesendet: Montag, 03. Dezember 2012 15:28
An: 'Richard Hipp'
Betreff: AW: [sqlite] Invalid Code gemerated for Virtual Table Join with OR
clause
Thank you for your reply.
As indicated in the second message, I have located the code where the
Hi,
I am getting failures in the below tests while doing the regression test on
Ubuntu
with ,
SHA1 Hash: ba8d08b67021a32fda069c18b7eb93523e6f0d1f
Date: 2012-11-27 21:56:28
Most of the failures are,
Expected: [1 1]
Got: [0 {}]
Are these errors serious, How to fix these ?
Thank You
Dear SQLite folks,
Am Sonntag, den 02.12.2012, 22:49 +0100 schrieb Paul Menzel:
using Debian Sid/unstable with self-built Evolution 3.4.4 and
libsqlite3-0 3.7.14.1-1, Evolution crashed with a segmentation fault.
pool[15522]: segfault at 5 ip b69bafe3 sp 8acf0850 error 6 in
On Tue, Dec 4, 2012 at 9:35 AM, Paul Menzel
paulepan...@users.sourceforge.net wrote:
Could this please be added to the bug tracker? Unfortunately this
backtrace is all I have got.
Just because SQLite appears in a stack trace does not mean that SQLite is
at fault here. In fact, far more
Hi
I have an existing application, which I am experimenting with
replacing MySQL with sqlite. I have 2 boxes, one running MySQL, the
other sqlite.
Execution times for every insert/update/delete SQLs is measured, and a
warn log is printed if it takes 250ms to perform the SQL.
OS configuration:
On Tue, Dec 4, 2012 at 2:30 PM, Keith Chew keith.c...@gmail.com wrote:
Hi
I have an existing application, which I am experimenting with
replacing MySQL with sqlite. I have 2 boxes, one running MySQL, the
other sqlite.
Execution times for every insert/update/delete SQLs is measured, and a
Hi Richard
On Wed, Dec 5, 2012 at 9:05 AM, Richard Hipp d...@sqlite.org wrote:
The $dir will contain initial database contents and scripts of SQL
statements that were run. You can rerun those SQL statement using the
command-line shell to find slow ones, then do things like EXPLAIN QUERY
PLAN
On 3 Dec 2012, Richard Hipp wrote:
... You can get a tarball or ZIP archive of the latest raw
sources from Fossil at http://www.sqlite.org/src/info/trunk
I notice that in this (3.7.15 pre-release snapshot) version of
the shell the .help out for the .dump command reads:
.dump ?TABLE? ...
I experience problems with Async IO testing the latest 3.7.15 trunk.
Simple statements like CREATE TABLE fail with SQLITE_IOERR.
I read the note in the Async IO README.txt that Async IO is now
superceded by WAL mode and no longer maintained.
Does this also mean that it will no longer be working
On Tue, Dec 4, 2012 at 4:11 PM, Ralf Junker ralfjun...@gmx.de wrote:
I experience problems with Async IO testing the latest 3.7.15 trunk.
Simple statements like CREATE TABLE fail with SQLITE_IOERR.
I read the note in the Async IO README.txt that Async IO is now
superceded by WAL mode and no
On 04.12.2012 22:14, Richard Hipp wrote:
Does this also mean that it will no longer be working with SQLite
3.7.15? Is it just deprecated for new development? Or has something else
changed that I should take care of?
That means that we are not willing to devote large amounts of time to it
On Tue, Dec 4, 2012 at 4:20 PM, Ralf Junker ralfjun...@gmx.de wrote:
On 04.12.2012 22:14, Richard Hipp wrote:
Does this also mean that it will no longer be working with SQLite
3.7.15? Is it just deprecated for new development? Or has something else
changed that I should take care of?
On Wed, Dec 5, 2012 at 9:33 AM, Keith Chew keith.c...@gmail.com wrote:
Any other ideas for me to trace this at a lower level would be greatly
appreciated. I think I will need to get deeper into linux's block
layer stuff, so perhaps this is not the correct place to ask the
question, but I
On 04.12.2012 22:25, Richard Hipp wrote:
My question is if existing applications which Async IO should continue
to work with SQLite 3.7.15? Or has something in the SQLite core changed
so that you'd expect Async IO failures in 3.7.15, or later versions?
They should continue to work, as far
On Wed, Dec 5, 2012 at 10:28 AM, Keith Chew keith.c...@gmail.com wrote:
I wonder what could be causing sqlite to hang so long? Will try to
remove all indexes to see if that narrows things down.
It is not an indexing issue. For one of the UPDATE SQLs, it is
updating a table with only 1 record
On Tue, Dec 4, 2012 at 4:45 PM, Keith Chew keith.c...@gmail.com wrote:
On Wed, Dec 5, 2012 at 10:28 AM, Keith Chew keith.c...@gmail.com wrote:
I wonder what could be causing sqlite to hang so long? Will try to
remove all indexes to see if that narrows things down.
It is not an indexing
Could it be waitiing on the prior transaction though?
Since disk I/O lies it might be syncing the last transaction causing the new
one to wait longer.
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
On Wed, Dec 5, 2012 at 10:56 AM, Richard Hipp d...@sqlite.org wrote:
It is not an indexing issue. For one of the UPDATE SQLs, it is
updating a table with only 1 record in it. And this takes 350ms...
Can you provide specifics: The schema and the UPDATE statement?
Schema and SQL are below:
Hi Michael
On Wed, Dec 5, 2012 at 10:57 AM, Black, Michael (IS)
michael.bla...@ngc.com wrote:
Could it be waitiing on the prior transaction though?
Since disk I/O lies it might be syncing the last transaction causing the new
one to wait longer.
Yes, that is possible. In the application, it
Am Sonntag, den 02.12.2012, 22:49 +0100 schrieb Paul Menzel:
using Debian Sid/unstable with self-built Evolution 3.4.4 and
libsqlite3-0 3.7.14.1-1, Evolution crashed with a segmentation fault.
pool[15522]: segfault at 5 ip b69bafe3 sp 8acf0850 error 6 in
On Wed, Dec 5, 2012 at 11:10 AM, Keith Chew keith.c...@gmail.com wrote:
The strange thing is that I am setting sqlite it to use WAL,
autocheckpoint off and synchronous off. Even in this setup, I still
see 350ms transactions times for less than 3 TPS. A bit hard to
believe, so I am now doing a
On 4 December 2012, Paul Menzel wrote:
After doing `apt-get source sqlite3` and building it myself with
`debuild -b -us -uc`, I have the source file `sqlite3.c` and I am able
to look at the code statements.
The backtrace from the core dump file is the following.
Thread 1 (Thread
Can you re-run your strace as strace -tt and look at the timings to help
pinpoint it?
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
From:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 04/12/12 14:43, Paul Menzel wrote:
The following code caused the segmentation fault.
By far the most likely cause is some other library or the app itself
stomping on SQLite's memory. SQLite is on every Android device, every iOS
device, virtually
Hi Michael
On Wed, Dec 5, 2012 at 12:02 PM, Black, Michael (IS)
michael.bla...@ngc.com wrote:
Can you re-run your strace as strace -tt and look at the timings to help
pinpoint it?
Since there is no fsync (I know this using grep on the strace ouput),
it is hard to tell what to look for in the
On Wed, Dec 5, 2012 at 1:14 PM, Keith Chew keith.c...@gmail.com wrote:
Since there is no fsync (I know this using grep on the strace ouput),
it is hard to tell what to look for in the strace. The output is very
noisy, so it makes it hard to go through them.
Does anyone know any handy flags
On 12/05/2012 09:22 AM, Keith Chew wrote:
On Wed, Dec 5, 2012 at 1:14 PM, Keith Chewkeith.c...@gmail.com wrote:
Since there is no fsync (I know this using grep on the strace ouput),
it is hard to tell what to look for in the strace. The output is very
noisy, so it makes it hard to go through
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