On Thu, Mar 8, 2012 at 11:56 AM, Nico Williams n...@cryptonector.com wrote:
On Thu, Mar 8, 2012 at 11:47 AM, Marc L. Allen
mlal...@outsitenetworks.com wrote:
But this is extremely inefficient as well. Since each record is, in fact,
an update, you're actually performing a delete/insert
On Thu, Mar 8, 2012 at 12:00 PM, Marc L. Allen
mlal...@outsitenetworks.com wrote:
This particular query need not be very inefficient if the pages needed
to do the second sub-query are left in the cache from the first sub-
query...
No. That's true. But this is just a simple example. It's
On Thu, Mar 8, 2012 at 1:52 PM, Pavel Ivanov paiva...@gmail.com wrote:
So, please.. add INSERT OR UPDATE. I'd ask that INSERT OR REPLACE be
modified to do an UPDATE to the record if the UNIQUE Constraint is violated
instead of the delete, but that would break existing applications.
Wasn't
On Thu, Mar 8, 2012 at 4:37 PM, Simon Slavin slav...@bigfraud.org wrote:
That's why you don't make a DBMS (SQL) do the job of a programming language.
Use your programming
language to to retrieve the values you need to make your calculations.
Then use your programming language to figure out
On Tue, Feb 7, 2012 at 11:12 AM, Michael Stephenson
domehead...@gmail.com wrote:
It's almost trivial to add per-page checksums at the page level. Here are
basic steps:
This is not enough, though it's a lot better than nothing. You need
to be able to store the checksums where the page
A checksum per-row is certainly a valuable thing at the layer above
the RDBMS since it allows for integrity checking above the RBDMS, and
in an RBDMS-independent manner. Of course, this approach is easiest
to graft into SQLite3 simply because you'd be adding a hidden column
and the machinery for
On Mon, Feb 6, 2012 at 9:36 AM, Bill McCormick wpmccorm...@gmail.com wrote:
Is there no way to force columns added to a table with alter table to be
added at certain column positions?
Alternatively, if there is some way to save the data in an existing table;
drop the table; re-create the
On Mon, Feb 6, 2012 at 1:20 PM, Roger Binns rog...@rogerbinns.com wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 06/02/12 09:11, Nico Williams wrote:
A checksum per-row is certainly a valuable thing at the layer above the
RDBMS since it allows for integrity checking above the RBDMS
I'm pretty sure that the user_version pragma is considered stable.
That said, if your application is in full control of the DB then you
could just check the exact create statements logged in sqlite_master
(this is probably less stable, ironically enough).
On Mon, Feb 6, 2012 at 2:27 PM, Roger Binns rog...@rogerbinns.com wrote:
On 06/02/12 11:35, Nico Williams wrote:
Indeed, but if you'd do integrity protection at the application layer
then surely you'd have have a backup/restore strategy to deal with
lower-layer corruption.
Only if you know
On Mon, Feb 6, 2012 at 4:38 PM, Simon Slavin slav...@bigfraud.org wrote:
On 6 Feb 2012, at 9:49pm, Nico Williams wrote:
Encryption is not enough. You really need block pointers to carry the
block checksum/hash/MAC/integrity tag.
File systems (FAT, NTFS, HTFS) already have block checksums
On Wed, Jan 25, 2012 at 3:07 PM, Richard Hipp d...@sqlite.org wrote:
The SQLite byte-code engine was being too conservative and was reparsing
the schema in places where it was not strictly necessary. The fix was to
restrict the places where the schema was reparsed to situations that really
If you're building a small web service, SQLite3 will do fine. If you
want to scale big you might be able to use SQLite3 for some pieces of
it, but you can't scale up a web service to thousands of servers with
tens of cores and one single SQLite3 DB -- that just doesn't work
given SQLite3's
Maybe a view is getting materialized, or a some other temp table's
creation under the hood is triggering this?
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On Mon, Jan 23, 2012 at 3:02 PM, John Elrick john.elr...@fenestra.com wrote:
I think I can inject something to do some measurements. I seem to recall,
however, that there was no substantive difference in the number of
times sqlite3RunParser
was called between the two. I'll check for:
which
On Tue, Dec 27, 2011 at 12:44 PM, Jens Frederich jfreder...@gmail.com wrote:
The sqlite3 command line app doesn't write the string correctly to the
database file. It uses the terminal (cmd) encoding instead the 'PRAGMA
encoding' statement.
None of the SQLite3 code converts between encodings
On Tue, Dec 20, 2011 at 5:21 AM, John Gillespie rjkgilles...@gmail.com wrote:
This would make a good entry for an Obfuscated SQL contest.
Well done
Thanks, I guess :) It was a fun little SQL ditty to write, and only
took a few minutes. (Now I do I a search and see that factorial in
SQL is a
You can do conditionals via WHERE clauses, as others have pointed out.
You can also use WHEN clauses on triggers.
Think of it as statement IF condition. And remember that the
WHERE clause can refer to all sorts of things, including parameters
from the application (something like WHERE @foo =
On Mon, Dec 19, 2011 at 10:31 PM, romtek rom...@gmail.com wrote:
I've always thought that because SQLite didn't enforce data types, I could
do what I have in the example, and this has worked! So, is this a bug in
more recent versions of SQLite or an intended change that I am unaware of?
You can CAST TEXT to BLOB, and you can use x'hex' for literal BLOBs.
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Docs would help people understand what you're up to...
Nico
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You're not yet convincing me (though that probably doesn't matter);
repeating my arguments would be obnoxious (or worse: boring!), so I
won't. Let's try a different approach: what's the ideal here? Here's
my answer: a plethora of interfaces to the same data (posts/threads).
I'd like to see:
-
On Tue, Nov 15, 2011 at 3:08 PM, Alek Paunov a...@declera.com wrote:
Me too. As simple first step - let's load the mail archives to downloadable
sqlite DB.
Why are the mail archives for sqlite-users not available for download?
As for loading them into a SQLite3 DB... I once wrote a schema for
I thought nowadays SQLite3 was smart enough to re-prepare a prepared
statement when the schema changes.
Nico
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On Fri, Nov 11, 2011 at 11:55 AM, Yuriy Kaminskiy yum...@mail.ru wrote:
One way or other, =, LIKE and GLOB results should be consistent.
If string is NUL-terminated, = should ignore everything after NUL.
If string is length-terminated, LIKE should not ignore bytes after NUL.
blob = blob should
On Thu, Nov 10, 2011 at 3:19 AM, yqpl y...@poczta.onet.pl wrote:
i did some test do check if indexes make it slow. instead of inserting to
disk database i use :memory: database - i have copied tables only - i
assume without indexes and then do inserts - and it works the same.
UNIQUE
On Fri, Nov 11, 2011 at 1:39 AM, yqpl y...@poczta.onet.pl wrote:
Nico Williams wrote:
What's your page size?
i have no access now to those files. but i didnt change any thing - so
default.
You really want to set the page size to something decent -- at least
the filesystem's preferred block
On Fri, Nov 11, 2011 at 1:16 PM, Simon Slavin slav...@bigfraud.org wrote:
On 11 Nov 2011, at 6:09pm, Nico Williams wrote:
blob = blob should be a binary comparison
blob = string should be a string comparison
blob LIKE pattern should either treat the blob as a string or not, but
I don't see
On Fri, Nov 11, 2011 at 2:38 PM, yqpl y...@poczta.onet.pl wrote:
yes still slows down.
Can you characterize it? All index inserts should slow down somewhat
as the index grows since lookup and insertion will be O(logN)
operations for b-trees, but also as your indexes grow larger than
available
On Wed, Nov 9, 2011 at 12:04 PM, Fabian fabianpi...@gmail.com wrote:
2011/11/9 Simon Slavin slav...@bigfraud.org
Didn't someone recently note that entering the first million records was
fast, but if he then closed and reopened the database, entering the next
100,000 records was slow ?
Yes,
Fabian,
What's wrong with reading the whole file into memory at boot time as a
way to prime the cache? Rebooting always takes some time, mostly the
time to read all sorts of files.
Nico
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On Wed, Nov 9, 2011 at 1:53 PM, Fabian fabianpi...@gmail.com wrote:
2011/11/9 Nico Williams n...@cryptonector.com
What's wrong with reading the whole file into memory at boot time as a
way to prime the cache? Rebooting always takes some time, mostly the
time to read all sorts of files.
It's
On Wed, Nov 9, 2011 at 3:24 PM, Fabian fabianpi...@gmail.com wrote:
2011/11/9 Nico Williams n...@cryptonector.com
I don't get it. You're reading practically the whole file in a random
manner, which is painfully slow, so why can't you read the file in one
fell swoop (i.e., sequential reads
What's your page size?
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On Thu, Nov 3, 2011 at 12:39 PM, Fabian fabianpi...@gmail.com wrote:
I just tested it, and it made no difference. The root cause of the problem
is most likely not slow writes, because inserting duplicate values (which
are ignored instead of written to disk) are just as slow.
If you could use
On Wed, Nov 2, 2011 at 11:41 AM, Fabian fabianpi...@gmail.com wrote:
2011/11/2 Mr. Puneet Kishor punk.k...@gmail.com
ahh, so you *are* getting expected behavior, just not what *you* expected.
Did you have a different number in mind instead of a factor of 300? And, if
so, why?
To read an
On Wed, Nov 2, 2011 at 1:20 PM, Fabian fabianpi...@gmail.com wrote:
Linux will not read the whole file in, but Windows eventually does. The
inserts go progressively faster when they are reaching halfway, and Windows
reads very large pages from disk, even if you request only 10 bytes. So in
The
On Wed, Nov 2, 2011 at 2:13 PM, Fabian fabianpi...@gmail.com wrote:
2011/11/2 Nico Williams n...@cryptonector.com
But note that this can still fail you when the file is larger than
available RAM. In that case such a flag would be very bad. And
SQLite3 can't know how much RAM is available
On Sun, Oct 23, 2011 at 8:42 AM, Yves Goergen
nospam.l...@unclassified.de wrote:
On 18.10.2011 16:40 CE(S)T, Simon Slavin wrote:
The way to settle this is easy: leave the mailing list in place.
Create a web forum. If people abandon the mailing list and start
using the web forum instead, it
On Thu, Oct 27, 2011 at 12:35 PM, Pete p...@mollysrevenge.com wrote:
The one attraction of a forum to me is that it's searchable so I'd be able
to check for any discussions before posting to the mailing list. Is there an
archive for the mailing list somewhere which could serve the same prupose?
On Wed, Oct 26, 2011 at 5:01 PM, Jay A. Kreibich j...@kreibi.ch wrote:
The use of IS is causing the query optimizer to use a full table
scan, essentially turning the query into a O(n) operation. This has
to do with how IS differs from = in the handling of NULLs. Since it
is possible bind
On Wed, Oct 19, 2011 at 4:00 AM, Stephan Beal sgb...@googlemail.com wrote:
On Tue, Oct 18, 2011 at 12:37 PM, Sune Ahlgren
sune_ahlg...@hotmail.comwrote:
What can I do to make SQLite run safely on CIFS?
Nothing. Even MS Access cannot (or could not way back when i used it) be
safely used on
On Wed, Oct 19, 2011 at 2:23 PM, Jay A. Kreibich j...@kreibi.ch wrote:
On Wed, Oct 19, 2011 at 02:13:35PM -0500, Nico Williams scratched on the wall:
On Wed, Oct 19, 2011 at 4:00 AM, Stephan Beal sgb...@googlemail.com wrote:
On Tue, Oct 18, 2011 at 12:37 PM, Sune Ahlgren
sune_ahlg
On Wed, Oct 19, 2011 at 4:16 PM, Jay A. Kreibich j...@kreibi.ch wrote:
On Wed, Oct 19, 2011 at 03:24:35PM -0500, Nico Williams scratched on the wall:
Also, regarding NFS, it would be safe to use if SQLite3 were to use
whole-file byte range locks. NFS makes concurrent access to byte
ranges
On Tue, Oct 18, 2011 at 4:35 AM, Frank Missel i...@missel.sg wrote:
I think that the sqlite-users e-mail list has enough traffic to warrant a
proper forum.
Has this been considered?
I know of no better forum than a mailing list for this sort of thing.
Mailing lists have archives that can be
On Tue, Oct 18, 2011 at 7:41 AM, John Drescher dresche...@gmail.com wrote:
My biggest reason for wanting a mailing list versus a forum is that I
subscribe to 20+ mailing lists that all go to my gmail account with
gmail rules to organize the content. If these mailing lists all were
forums I
On Fri, Oct 7, 2011 at 1:17 PM, Roger Binns rog...@rogerbinns.com wrote:
On 07/10/11 09:52, Simon Slavin wrote:
Do you really want to see all 50,000 entries that that search would
return ?. If this kind of search returns more than 100 records,
there's no point in doing it at all.
You can
On Fri, Oct 7, 2011 at 5:52 PM, Simon Slavin slav...@bigfraud.org wrote:
Okay, I understand why defining an ORDER BY requires the entire result set to
be retrieved. I had intended to remove ORDER BY when I used COUNT(*), though
I didn't mention that.
If the ORDER BY can be satisfied
On Fri, Jun 17, 2011 at 5:05 PM, Mr. Puneet Kishor punk.k...@gmail.com wrote:
The above is not SQL. You can't have a SQL statement begin with CASE. SQL
statements can only begin with either SELECT or UPDATE or CREATE or DELETE or
ALTER, etc. CASE is an expression, and has to be a replacement
On Tue, Jun 14, 2011 at 1:58 PM, Alexey Pechnikov
pechni...@mobigroup.ru wrote:
As example, we have view:
create view vtest as select name1 || ' ' || name2 as name from test;
How to get the definition of name field (will be name1 || ' ' ||
name2)? Of cource, the view can be more complex.
On Tue, Jun 7, 2011 at 4:36 AM, Jean-Christophe Deschamps
j...@antichoc.net wrote:
Now, please try this:
You miss the point. Not every app requires extended precision. But
just because you don't require extended precision doesn't mean you
can't use FP at all. It depends on the app.
Nico
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On Tue, Jun 7, 2011 at 5:31 AM, Ronald Burgman
r.w.burg...@student.utwente.nl wrote:
Now, I'm not sure if getpwuid actually allocates memory. Some
documentation does not mention anything about it; some mention it is not
possible; some mention that getpwuid can result in an ENOMEM
(allocation
On Mon, Jun 6, 2011 at 5:57 AM, Simon Slavin slav...@bigfraud.org wrote:
No, it's in the standard. Unfortunately you have to pay to receive the
standards document, but in the draft standard at
http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt
see the top of page 7:
null value
On Mon, Jun 6, 2011 at 2:55 PM, Jean-Christophe Deschamps
j...@antichoc.net wrote:
Allow me to add a humble bit to what Jay just posted.
SQLite, as well as most other RDBMS around, allow you to perform FP
calculations in SQL statements. I assume no-one imagines an extended
FP fine-grain
On Mon, Jun 6, 2011 at 4:27 PM, Sidney Cadot sid...@jigsaw.nl wrote:
If you want bare metal IEEE 754 for your scientific computing
application, then you might want to rethink doing your math operations
in a data storage system.
You are making it sound as if proper support for IEEE-754 types
On Mon, Jun 6, 2011 at 4:58 PM, Jean-Christophe Deschamps
j...@antichoc.net wrote:
Look at a FP-intensive product like Spatialite (SQLite-based). You'd
probably agree it performs much more complex tasks than average, mean
squares and such.
I'd be very surprised if it used NaN representations!
On Mon, Jun 6, 2011 at 6:28 PM, Simon Slavin slav...@bigfraud.org wrote:
I've rethought my earlier position. This re-think is the result of the SQL
standard being incompatible with the IEEE standard. If you want to do IEEE
arithmetic, do it in your own software, and use SQL just for
Try ... WHERE f IS NULL. SQL is a programming language with three-valued
logic, meaning it has truth, falsehood, and null. NULL != NULL, strangely
enough.
Nico
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On Jun 3, 2011 8:54 AM, Paul Sanderson sandersonforens...@gmail.com
wrote:
I am sure tihs is basic but.
I have a database
On Jun 3, 2011 10:04 AM, Ian Hardingham i...@omroth.com wrote:
Thank you Igor, I'll do some more thorough profiling.
When I run the query:
UPDATE multiturnTable SET complete=1 WHERE id=-5
This takes ~45ms (as reported by SQLite's profile) - is this in the
right ballpark? I'm running
Indexes slow down writes somewhat, true, but it sounds like the OP's issue
is with commit latency, the average minimum bound for which is given by the
storage hardware's capabilities.
Nico
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On Jun 3, 2011 10:31 AM, Ian Hardingham i...@omroth.com wrote:
Hey guys, once again thanks for the help.
Should really every single INSERT/UPDATE section have a begin/end
transaction around it?
There's an implied begin/commit if you don't put them there. It's when you
can batch lots of
On Thu, Jun 2, 2011 at 10:53 AM, Richard Hipp d...@sqlite.org wrote:
http://www.sqlite.org/src/ci/efb20b9da6
Note, however, that lemon.c is not a deliverable component of SQLite, but
rather a code generator program that generates some of the C code for
SQLite, and lemon always runs on a
On Jun 1, 2011 1:46 PM, Jan Hudec b...@ucw.cz wrote:
On Tue, May 31, 2011 at 16:44:13 -0500, Nico Williams wrote:
On Tue, May 31, 2011 at 4:22 PM, Simon Slavin slav...@bigfraud.org
wrote:
Split the DROP into two stages:
DELETE FROM myTable;
DROP TABLE myTable;
Which one takes
Just a guess: finding all the pages to free requires traversing the
internal nodes of the table's b-tree, which requires reading a fair
subset of the table's b-tree, which might be a lot of I/O. At 150MB/s
it would take almost two minutes to read 15GB of b-tree pages from a
single disk, and
On Tue, May 31, 2011 at 4:22 PM, Simon Slavin slav...@bigfraud.org wrote:
Split the DROP into two stages:
DELETE FROM myTable;
DROP TABLE myTable;
Which one takes all the time ? If it's the second one, then perhaps just
delete all the records. Filling the table back up again with new
You could set a flag nothing that parameters have been optimized out, so the
statement author can be warned. Where to encode the flag? Maybe in some
opcode's unused parameter?
Nico
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Use AS to ensure that views'columns get useful column names.
Nico
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I've a patch that has only one bug that I'm aware of left: in
autocommit mode, a PRAGMA connect_triggers=1; will fire any connect
triggers and any before commit triggers, but not any after begin
triggers -- mildly annoying, but tolerable.
Writing tests, however, I discovered something subtle and
Answering myself...
It may be feasible to [with little code] catch schema changes that
would invalidate DB triggers before committing them. I'm not yet sure
how to do that without re-entrance, but that may be OK too (hey,
OP_ParseSchema does it). At least I've an idea that might be worth
On Thu, May 19, 2011 at 3:08 AM, Stephan Beal sgb...@googlemail.com wrote:
On Thu, May 19, 2011 at 7:03 AM, Nico Williams n...@cryptonector.comwrote:
How does one remove changesets? How does one collapse deltas?
Fossil doesn't allow one to remove changesets (and i'm not sure what
collapsing
I suppose one could use the shunned artifacts feature, then rebuild
the repository as a way to collapse deltas, but that sounds like a lot
of work. I'll just not collapse deltas.
Also, I like the git format-patch feature - it's basically a diff with
a header slapped on, but still, it's quite
I installed Fossil using aptitude, but I'm thinking I should have
built and installed it from source. I'm seeing a few issues with the
version I'm using ([15cb835736] 2010-06-17 18:39:10 UTC):
- The Makefile from the SQLite3 docs repository doesn't get checked
out -- I thought there wasn't any,
On Thu, May 19, 2011 at 12:01 PM, Richard Hipp d...@sqlite.org wrote:
Anythings possible. But we've been using Fossil heavily, daily, for 4 years
now without any hints of these kinds of problems. So fundamental bugs like
what you propose seem improbable. I'm thinking something else is going
On Thu, May 19, 2011 at 12:37 PM, Richard Hipp d...@sqlite.org wrote:
On Thu, May 19, 2011 at 1:23 PM, Nico Williams n...@cryptonector.comwrote:
Everything is protected by multiple cryptographic hashes, both SHA1 and
MD5. On-the-wire corruption is not a realistic possibility.
Excellent
On Thu, May 19, 2011 at 4:22 PM, Pavel Ivanov paiva...@gmail.com wrote:
Is there a rationale for allowing such statements or is that an effect
of the 'Lite' nature? (Note: I'm not complaining, just asking.)
I believe that's an effect of the typeless design. As SQLite doesn't
have strict type
On Thu, May 19, 2011 at 4:28 PM, Nico Williams n...@cryptonector.com wrote:
However, I'm not sure how to write this such that there can be only
one of those constraints of which there should be just one but without
then imposing ordering on those constraints. IMO there's no need to
fix
foreach {tn uri file} {
1 test.db test.db
...
14 file:test%00.db%00extra test
15 test.db?mork=1#boris test.db?mork=1#boris
16 file://localhostPWD/test.db%3Fhello test.db?hello
} {
if
So I've stumbled twice trying to set up use of Fossil, both times with
respect to how to create a private branch.
First I did fossil branch new ... and didn't realize that the
workspace was not switched to be in that branch, so that my subsequent
commit didn't go to that branch.
My second
On Wed, May 18, 2011 at 4:14 PM, Petite Abeille
petite.abei...@gmail.com wrote:
Very nice, thanks for sharing :)
Wish such a functionality was part of the stock SQLite :))
Thanks for the kind words! I will do my best to make it palatable and
hopefully desirable for the core dev team to
On Wed, May 18, 2011 at 4:10 PM, Petite Abeille
petite.abei...@gmail.com wrote:
On May 18, 2011, at 10:50 PM, Danilo Cicerone wrote:
How can I simulate a
calendar table(maybe using the strftime funtion)?
Well, you have two broad options:
(1) materialize the calendar as a table
(2)
The SQLite3 docs Fossil repository doesn't seem to include any
instructions for building the docs. I've searched sqlite.org up and
down (docs and wiki both) for these instructions. I've also searched
the web a bit and found nothing obvious. I have figured out something
from the file named
On Wed, May 18, 2011 at 5:11 PM, Petite Abeille
petite.abei...@gmail.com wrote:
Where does the start_gap and end_gap come from? They are only declared in the
select part of the inner select statement, and nowhere in the from part. But
nonetheless, SQLite manages to use these non existing
On Wed, May 18, 2011 at 9:44 PM, Richard Hipp d...@sqlite.org wrote:
You need tclsqlite3.c, not sqlite3.c. main() is found in tclsqlite3.c. The
comment in the Makefile is not clear on this point and needs to be fixed
Oh, duh. Thanks!
Nico
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On Wed, May 18, 2011 at 9:50 PM, Richard Hipp d...@sqlite.org wrote:
On Wed, May 18, 2011 at 1:27 PM, Nico Williams n...@cryptonector.comwrote:
Also, I didn't expect commits and branches to go to the repository
that I cloned mine from. That was surprising! With git and other
similar VCSes
On Tue, May 17, 2011 at 7:37 PM, Frank Chang frank_chan...@hotmail.com wrote:
Hi, I just ran this sqlite command to randomly delete 20% of the rows in a
15000 row sqlite table. DELETE FROM TABLE
WHERE ROWID IN (SELECT ROWID FROM TABLE ORDER BY RANDOM() LIMIT 3000)
Now there are gaps
In my next post I'll post a [681 line, 28KB unified diff, or 504 line
regular diff] patch implements the following DB triggers:
- AFTER DATABASE CONNECT
- AFTER TRANSACTION BEGIN
- BEFORE TRANSACTION COMMIT
These triggers do exactly what I want, and nothing more. If anyone
wants to test this
On May 16, 2011 9:33 AM, Simon Slavin slav...@bigfraud.org wrote:
On 16 May 2011, at 3:44am, romtek wrote:
Secondly, if I executed the above SQL code, what would happen to
triggers,
etc. that are associated with the original table?
I suspect that's a major reason why SQLite doesn't support
And here's the patch. I should have been using Fossil all this time.
I'll switch to Fossil soon. For now the patch is to
sqlite\-src\-3070602.
A few more notes on the patch besides the ones I posted earlier:
- DB triggers are omitted by defining SQLITE_OMIT_TRIGGER
- DB triggers are
On Mon, May 16, 2011 at 1:18 PM, Jay A. Kreibich j...@kreibi.ch wrote:
On Mon, May 16, 2011 at 12:49:14PM -0500, Nico Williams scratched on the wall:
Nit: that's almost certainly the reason that SQLite3 doesn't support
column rename,
I think the bigger issue is that column rename requires
On Mon, May 16, 2011 at 1:29 PM, Simon Slavin slav...@bigfraud.org wrote:
Yet strangely, the ability to obtain the statements used to create the schema
is something I find very useful in quite a few utilities. If you could
depend on them being in a standard format they'd be even more useful.
On Sun, May 15, 2011 at 9:44 PM, romtek rom...@gmail.com wrote:
On Sun, May 15, 2011 at 5:10 PM, Mr. Puneet Kishor punk.k...@gmail.comwrote:
I want to rename date to dateAdded.
sqlite doesn't support changing the name of a table column (and, neither
you nor your user should be doing this --
It's perfectly fair to ask for a feature. And ALTER TABLE rename
column support is a well justified feature to want, IMO; I don't blame
you for wanting it. Whether it will be added, or when, I'd not know.
The dev team (whom I do not speak for) has its priorities, and its
paying customers to
On May 13, 2011 8:17 PM, BareFeetWare list@barefeetware.com wrote:
There is no function built into SQLite to convert a text string into a set
(eg convert 1,8,15 into (1, 8, 15)), but such a function is not needed in
this case. You need a better design of your database. SQLite is relational
I believe I've got solutions to the various little problems I've run
into. My experiments have helped me shed some light on what the
semantics of DB triggers should be, to the point where I think I've
reached stable conclusions about those semantics. I'm also ready to
characterize performance
On Wed, May 11, 2011 at 12:18 PM, Martin Engelschalk
engelsch...@codeswift.com wrote:
This question does not arise with SQLite, because parallel transaction
are not supported, as Igor and Pavel pointed out.
However, consider this: If you have a unique constraint on a table like
in your
On May 11, 2011 7:14 PM, John tauru...@gmail.com wrote:
let's say I have a table with columns for each day of the week
create table seven_days
(monday_value integer,
tueday_value integer,
wednesday_value integer,
... );
I want to select value from whatever day it is today. So if
On Wed, May 11, 2011 at 8:47 PM, John tauru...@gmail.com wrote:
That would work if I needed to select a single column from a table. But if I
need to select multiple values (c1, c2), then it wouldn't work. Can't have
subquery with more than one column selected, in general, I think.
You can do
On Wed, May 11, 2011 at 9:03 PM, John tauru...@gmail.com wrote:
Yes, I could. But considering that I'm applying tons of logic and not just
selected this would be a real mess. Not even sure I could pull it.
Normalization was something I lacked with regard to previous post. But in
this case, I
Or just a function to return the size of the current DB. Mind you,
automatically deleting rows from a log table isn't enough: you may
have to periodically VACUUM the DB, or you may have to setup
auto_vacuum (and incremental_vacuum).
I have code like this in one DB:
CREATE TABLE IF NOT EXISTS
On Tue, May 10, 2011 at 12:00 PM, Jay A. Kreibich j...@kreibi.ch wrote:
I guess I am looking for a round robin queue here?
I'd do something like this. This keeps a constant number of messages
in the log. The msg_id provides a message counter, while the
msg_seq is used to keep the
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