On Fri, Sep 12, 2014 at 11:48 PM, Eric Rubin-Smith eas@gmail.com
wrote:
Looking at the sqlite web site and mailing lists shows that the SQLite team
has taken a stab at answering the question, is it faster to read a blob
out of sqlite or out of a file?. See the links below.
Does the team
I occasionally have the need to update two columns based on complex sub
queries, which are often very similar
UPDATE
t
SET
x = ( SELECT 1...),
y = ( SELECT 2...)-- nearly the same as SELECT 1
;
Normally one could use a CTE to do the work once:
WITH
On Mon Sep 15, 2014 at 10:51:04AM +0200, Mark Lawrence wrote:
Normally one could use a CTE to do the work once:
WITH
cte
AS (
SELECT 1 AS x, 2 AS y
)
UPDATE
t
SET
x = cte.x,
y = cte.y
;
Actually this doesn't
On 09/15/2014 03:18 PM, Dominique Devienne wrote:
On Fri, Sep 12, 2014 at 11:48 PM, Eric Rubin-Smith eas@gmail.com
wrote:
Looking at the sqlite web site and mailing lists shows that the SQLite team
has taken a stab at answering the question, is it faster to read a blob
out of sqlite or out
On Mon, Sep 15, 2014 at 12:29 PM, Dan Kennedy danielk1...@gmail.com wrote:
On 09/15/2014 03:18 PM, Dominique Devienne wrote:
On Fri, Sep 12, 2014 at 11:48 PM, Eric Rubin-Smith eas@gmail.com
wrote:
Looking at the sqlite web site and mailing lists shows that the SQLite
team
has taken a
Hi,
How do I set the sqlite compile time option SQLITE_DEBUG ?
Can you please specify how I should set it in the command line ?
Thanks
Prakash
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On 15 Sep 2014, at 12:19pm, Dominique Devienne ddevie...@gmail.com wrote:
On Mon, Sep 15, 2014 at 12:29 PM, Dan Kennedy danielk1...@gmail.com wrote:
On 09/15/2014 03:18 PM, Dominique Devienne wrote:
whenever
you
want to update a single byte of a blob, you must rewrite the whole row,
On 15 Sep 2014, at 12:46pm, Prakash Premkumar prakash.p...@gmail.com wrote:
How do I set the sqlite compile time option SQLITE_DEBUG ?
Include the following line in your C source code:
#define SQLITE_DEBUG 1
near the top, along with any other lines you have starting with '#'. The line
On Mon, Sep 15, 2014 at 1:59 PM, Simon Slavin slav...@bigfraud.org wrote:
On 15 Sep 2014, at 12:19pm, Dominique Devienne ddevie...@gmail.com
wrote:
On Mon, Sep 15, 2014 at 12:29 PM, Dan Kennedy danielk1...@gmail.com
wrote:
On 09/15/2014 03:18 PM, Dominique Devienne wrote:
want to update
On 15 Sep 2014, at 1:23pm, Dominique Devienne ddevie...@gmail.com wrote:
On Mon, Sep 15, 2014 at 1:59 PM, Simon Slavin slav...@bigfraud.org wrote:
It just rewrites
bytes wherever the existing row is on disk,
Then how is this transaction safe? I might not be reading the doc right,
but I
On Mon, Sep 15, 2014 at 8:08 AM, Simon Slavin slav...@bigfraud.org wrote:
On 15 Sep 2014, at 12:46pm, Prakash Premkumar prakash.p...@gmail.com
wrote:
How do I set the sqlite compile time option SQLITE_DEBUG ?
Include the following line in your C source code:
#define SQLITE_DEBUG 1
Dominique Devienne wrote:
Looking at the sqlite web site and mailing lists shows that the SQLite
team
has taken a stab at answering the question, is it faster to read a blob
out of sqlite or out of a file?. See the links below.
Does the team have analogous guidance regarding
On Sun, Sep 14, 2014 at 12:18 AM, Lea Verou l...@verou.me wrote:
Per the 3.7.11 changelog [1], queries of the form SELECT max(x), y FROM
table return the value of y from the same row that contains the maximum x
value. However, this:
select y from (SELECT max(x), y FROM table);
would not
On 09/15/2014 06:19 PM, Dominique Devienne wrote:
On Mon, Sep 15, 2014 at 12:29 PM, Dan Kennedy danielk1...@gmail.com wrote:
On 09/15/2014 03:18 PM, Dominique Devienne wrote:
On Fri, Sep 12, 2014 at 11:48 PM, Eric Rubin-Smith eas@gmail.com
wrote:
Looking at the sqlite web site and
This construct does not work in postgresql 9.3.5 (unless I have a typo).
However, I would love for it to work in both Postgresql and Sqlite.
djenkins@ostara ~ $ psql -Upostgres -dcapybara_regtest
psql (9.3.5)
Type help for help.
capybara_regtest=# create table test1 (col1 integer, col2
On Mon, Sep 15, 2014 at 10:21 AM, Dennis Jenkins
dennis.jenkins...@gmail.com wrote:
This construct does not work in postgresql 9.3.5 (unless I have a typo).
However, I would love for it to work in both Postgresql and Sqlite.
djenkins@ostara ~ $ psql -Upostgres -dcapybara_regtest
psql
Maybe you can reformulate the query to fit
INSERT OR UPDATE INTO t SELECT t.a,t.b,...,s.x,s.y FROM t, s ...
-Ursprüngliche Nachricht-
Von: Mark Lawrence [mailto:no...@null.net]
Gesendet: Montag, 15. September 2014 10:51
An: sqlite-users@sqlite.org
Betreff: [sqlite] SET (x,y) = (x1,y1)?
On Sep 15, 2014, at 7:08 PM, Hick Gunter h...@scigames.at wrote:
Maybe you can reformulate the query to fit
INSERT OR UPDATE INTO t SELECT t.a,t.b,...,s.x,s.y FROM t, s …
There is no such a thing as 'INSERT OR UPDATE’ in SQLite. There is a ‘REPLACE’,
but it’s definitively not the same as
On Sep 15, 2014, at 4:48 PM, Richard Hipp d...@sqlite.org wrote:
On Sun, Sep 14, 2014 at 12:18 AM, Lea Verou l...@verou.me wrote:
Per the 3.7.11 changelog [1], queries of the form SELECT max(x), y FROM
table return the value of y from the same row that contains the maximum x
value.
Hi all,
I've found that an sql request that I expected to fail, but it didn't. On
the face of it that is good news but there is a potential downside. I wonder
if my expectation is wrong or if this is a bug which so far hasn't been
caught.
The problem deals with dividing by 0. As far as I
On Mon, Sep 15, 2014 at 2:50 PM, Dave Wellman dwell...@ward-analytics.com
wrote:
The problem deals with dividing by 0. As far as I can remember, in every
programming language that I have ever used and in all databases that I've
used, if you try and divide by 0 the process will fail with a
On 15 Sep 2014, at 7:50pm, Dave Wellman dwell...@ward-analytics.com wrote:
Should trying to divide by 0 result in an error?
No. There's no mechanism for reporting a mathematical error in SQL. You can
report malformed commands, references to entities (tables, columns, etc.) which
don't
System.Data.SQLite version 1.0.94.0 (with SQLite 3.8.6) is now available on
the System.Data.SQLite website:
https://system.data.sqlite.org/
Further information about this release can be seen at
https://system.data.sqlite.org/index.html/doc/trunk/www/news.wiki
Please post on the
When I query a field defined with type 'real', I get '.0' appended to the
results for whole numbers. For example if the value in the field is 1, it
appears as 1.0 in the query results.
Is there some way for me to change this? I poked around in the code and it
appeared that the format string
On Mon, Sep 15, 2014 at 3:02 PM, Nelson, Erik - 2
erik.l.nel...@bankofamerica.com wrote:
When I query a field defined with type 'real', I get '.0' appended to the
results for whole numbers. For example if the value in the field is 1, it
appears as 1.0 in the query results.
Is there some
Richard Hipp wrote on Monday, September 15, 2014 3:16 PM
On Mon, Sep 15, 2014 at 3:02 PM, Nelson, Erik - 2
erik.l.nel...@bankofamerica.com wrote:
When I query a field defined with type 'real', I get '.0' appended to
the results for whole numbers. For example if the value in the field
Richard,
Thanks for that, at least I know that what I'm seeing is going to continue.
Simon,
I'm really surprised at that. Effectively what this means is that the answer
that Sqlite returns may or may not be the correct result. I realise this may
only be in a single circumstance but that is still
On 15 Sep 2014, at 8:33pm, Dave Wellman dwell...@ward-analytics.com wrote:
Simon,
I'm really surprised at that. Effectively what this means is that the answer
that Sqlite returns may or may not be the correct result.
What ? No. It's correct. The answer is not known, and NULL means I don't
On 2014/09/15 20:50, Dave Wellman wrote:
Hi all,
I've found that an sql request that I expected to fail, but it didn't. On
the face of it that is good news but there is a potential downside. I wonder
if my expectation is wrong or if this is a bug which so far hasn't been
caught.
The
On 2014/09/15 22:13, Simon Slavin wrote:
On 15 Sep 2014, at 8:33pm, Dave Wellman dwell...@ward-analytics.com wrote:
Simon,
I'm really surprised at that. Effectively what this means is that the answer
that Sqlite returns may or may not be the correct result.
What ? No. It's correct. The
On Fri, Sep 12, 2014 at 6:47 PM, James K. Lowden
jklow...@schemamania.org wrote:
On Fri, 12 Sep 2014 19:38:53 +0100
Simon Slavin slav...@bigfraud.org wrote:
I don't think it can be done by trying to build it on top of an
existing file system. I think we need a file system (volume format,
On Fri, Sep 12, 2014 at 7:21 PM, Richard Hipp d...@sqlite.org wrote:
On Fri, Sep 12, 2014 at 8:07 PM, Simon Slavin slav...@bigfraud.org wrote:
one thing that annoys me about SQLite is that it needs to make a
journal file which isn't part of the database file. Why ? Why can't it
just write
On Sat, Sep 13, 2014 at 10:39 AM, Richard Hipp d...@sqlite.org wrote:
I say that a filesystem is an eventually-consistent key/value database.
Yes!
The keys are the filenames and the values are all big BLOBs, specifically
the file content. Filesystems also have a hierarchical keyspace, which
On Mon, 15 Sep 2014 21:13:01 +0100
Simon Slavin slav...@bigfraud.org wrote:
I suppose we then get into a discussion of what is the 'correct
result'. I completely understand that NULL is unknown, but I've
always thought that there is a difference between unknown and
'error'.
It is not
On 16 Sep 2014, at 1:23am, James K. Lowden jklow...@schemamania.org wrote:
Whether or not something is an error is a matter of definition.
SQLite defines division by zero to be NULL. It's very unusual in that
regard.
MySQL does it too unless ERROR_FOR_DIVISION_BY_ZERO mode is enabled:
Hi,
Can you please tell me which function/set of functions convert the SQL
query to Vdbe program ?
Thanks
Prakash
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