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On 08/19/2010 07:31 AM, Benjamin Peterson wrote:
I was curious if there's a reason why BINARY as a column type doesn't produce
a
column without a type affinity like BLOB. This would be one less special case
between SQLite and other RDMS.
The
thanks for your reply, do you known some sqlite gui administrator to create
referential integrity
Gher
Igor Tandetnik wrote:
gher gvallej...@gmail.com wrote:
Hello everybody, does support referential integrity SQLITE database..?
Yes it does.
--
Igor Tandetnik
Hi Pavel,
I think I guess that I understand what your point is.
On 2010-08-18 21:18, Pavel Ivanov wrote:
This is exactly the reason why it's not logical action: SQLite will
check constraint only in those places where it knows that something is
changed and constraint can be violated. And it
On 18 Aug 2010, at 9:54pm, Stephan Wehner wrote:
So attaching the file1 before creating the table in file2
is going to fail? (Then sqlite would know about the {texts} table)
The ATTACH command is a bit of a misnomer: it doesn't do anything to the
database files. It affects a particular
On 19 Aug 2010, at 12:19pm, gher wrote:
thanks for your reply, do you known some sqlite gui administrator to create
referential integrity
Your question does not make sense. Everything done using the proper SQLite
calls results in a database with referential integrity. If you want
On 17 Aug 2010, at 1:28pm, Lukas Haase wrote:
My sqlite database is about 65 MB. The data is split into serval tables.
Is there a way to enumerate the space requirements for each table so
that I can see which tables are the memory consumers?
Do you see the space taken by indexes as being
On 18 Aug 2010, at 6:33pm, Nikolaus Rath wrote:
Still no one able to clarify the issues raised in this thread?
Let me try to summarize what I still don't understand:
- Will SQLite acquire and release an EXCLUSIVE lock while keeping a
SHARED lock if one executes a UPDATE query with one
Download the sqlite3_analyzer.exe utility from the website and run it on
your database file.
On Tue, Aug 17, 2010 at 8:28 AM, Lukas Haase lukasha...@gmx.at wrote:
Hi,
My sqlite database is about 65 MB. The data is split into serval tables.
Is there a way to enumerate the space requirements
I don't know what you mean by 'cursor'. SQLite has commands. You execute
one command at a time. Even a command like a SELECT that gathers lots of
data gathers the data all in one go, then finishes. SQLite does not mark its
place with one command, then return to that place again with
I am more or less playing with triggers trying to learn what they can do.
I have a setup where I write data to Table1. An after insert trigger looks up
the newly written data codes in Table1, and writes 1 to 4 records to Table2. An
after insert trigger on Table2 looks at the new data and
On 19 Aug 2010, at 8:06pm, Pavel Ivanov wrote:
Simon, read the whole thread please. Here is an example of 'cursor' in
SQLite which Nikolaus talks about:
Thanks. I didn't know about the SQLite internals involved. Thanks for posting
the detailed information.
Simon.
On 19 Aug 2010, at 8:10pm, David Bicking wrote:
The way it is set up, if any of the updates/inserts done by the triggers
fail, everything rolls back, including the original data that caused the
triggers. What I want to happen is that while everything else gets rolled
back, Table1 still
On Thu, Aug 19, 2010 at 07:54:19PM +0100, Simon Slavin scratched on the wall:
I don't know what you mean by 'cursor'. SQLite has commands. You
execute one command at a time. Even a command like a SELECT that
gathers lots of data gathers the data all in one go, then finishes.
None of
--- On Thu, 8/19/10, Simon Slavin slav...@bigfraud.org wrote:
On 19 Aug 2010, at 8:10pm, David Bicking wrote:
The way it is set up, if any of the updates/inserts
done by the triggers fail, everything rolls back, including
the original data that caused the triggers. What I want to
On Aug 19, 2010, at 4:00 PM, David Bicking wrote:
I haven't tried RAISE(ROLLBACK... as that seems to severe.
RAISE(ABORT... removes the initial insert to Table1, which I want to avoid.
RAISE(FAIL.. on lets say the fourth record inserted in to Table2, would leave
the first three there,
Hi,
I really appreciate that sqlite got this feature to reduce
fragmentation, but why not expose this as a pragma? In many cases it is
not feasible to pass the chunk size via a C API. For example with a
pragma I could do fragmentation testing via an sqlite shell, now this
option is out
Afaict sqlite doesn't support indices on subsets of rows in a table, Ю
la http://en.wikipedia.org/wiki/Partial_index -- right?
Any plans to implement that?
Are there any known hacks to implement something similar?
--
Eric A. Smith
Keeping Young #3:
Keep the juices flowing by janglin round
Ah, an opportunity for another purist tirade presents itself.
I don't have a hack for SQLite but something I consider to be a much better
practice that accomplishes the same goal. If your business rules would
declare that rows with value X in column Y no longer belong to the set, the
most
On Fri, Aug 20, 2010 at 12:27 AM, Taras Glek tg...@mozilla.com wrote:
Hi,
I really appreciate that sqlite got this feature to reduce
fragmentation, but why not expose this as a pragma?
Taras, I think that you're overestimating the feature. On the OS level it
won't matter how far the file
On Thu, 19 Aug 2010 17:15:40 -0400, Tim Romano
tim.romano...@gmail.com wrote:
Ah, an opportunity for another purist tirade presents itself.
I don't have a hack for SQLite but something I consider to be a much better
practice that accomplishes the same goal. If your business rules would
declare
Tim Romano wrote:
The partial index is one very messy thing, fraught with ambiguities,
something to avoid.
I want an index that only can be used to find rows with a particular
value or set of values. In what way is that ambiguous? Other databases
(e.g. postgres) seem to support this
On Thu, 19 Aug 2010 17:39:14 -0400, Eric Smith
eas@gmail.com wrote:
Am I missing something?
You could add a deleted column with value range (0,1) and
create an index on it if benchmarks show that makes it
faster. As a bonus it is easier to code and maintain than a
separate table with
On 19 Aug 2010, at 9:27pm, Taras Glek wrote:
I really appreciate that sqlite got this feature to reduce
fragmentation, but why not expose this as a pragma?
Do you have figures which suggest that reducing fragmentation leads to any
improvement in performance ?
It might be worth noting that
On 19 Aug 2010, at 10:39pm, Eric Smith wrote:
I want an index that only can be used to find rows with a particular
value or set of values.
Take a look at VIEWs:
http://www.sqlite.org/lang_createview.html
This is the SQL standard way to reduce your view of a table to just certain
rows. If
On 19 Aug 2010, at 9:00pm, David Bicking wrote:
I haven't tried RAISE(ROLLBACK... as that seems to severe.
RAISE(ABORT... removes the initial insert to Table1, which I want to avoid.
RAISE(FAIL.. on lets say the fourth record inserted in to Table2, would leave
the first three there, which
Simon Slavin slav...@bigfraud.org wrote:
If that worries you then you should be aware that the same problem applies
when one TRIGGER triggers another:
http://www.sqlite.org/pragma.html#pragma_recursive_triggers
You have to remember to turn it on in your application. My understanding of
On 19 Aug 2010, at 11:22pm, Igor Tandetnik wrote:
No, cascading triggers (one trigger causing another to fire) have always
worked (always meaning long enough that I can't recall when this was *not*
the case). Recursive triggers (a trigger causing itself to fire, directly or
indirectly)
On 8/19/10, Simon Slavin slav...@bigfraud.org wrote:
On 19 Aug 2010, at 9:27pm, Taras Glek wrote:
I really appreciate that sqlite got this feature to reduce
fragmentation, but why not expose this as a pragma?
Do you have figures which suggest that reducing fragmentation leads to any
On Thu, Aug 19, 2010 at 5:53 PM, Kees Nuyt k.n...@zonnet.nl wrote:
On Thu, 19 Aug 2010 17:39:14 -0400, Eric Smith
eas@gmail.com wrote:
Am I missing something?
You could add a deleted column with value range (0,1) and
create an index on it if benchmarks show that makes it
faster. As a
I updated to latest fossil version, ran make distclean, ./configure, make,
make test and got this:
avtrans-9.19.4-5116... Ok
avtrans-9.19.5-5116... Ok
avtrans-9.20.1-5640... Ok
avtrans-9.20.2-5640... Ok
avtrans-10.1... Ok
avtrans.test-closeallfiles... Ok
avtrans.test-sharedcachesetting... Ok
Eric,
How would you find a row whose column X contained value Y if the partial
index on column X specified that rows containing value Y in column X should
never be returned? If the index hides the row, how do you cause the row to
become visible to a query? You have to drop the index.
However, I
Typo:
... more performant than partial query should read more performant than a
partial index.
Tim Romano
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Tim Romano tim.romano...@gmail.com wrote:
How would you find a row whose column X contained value Y if the partial
index on column X specified that rows containing value Y in column X should
never be returned?
No one suggests partial index should be capable of hiding anything. The idea is
Whether SQLITE_FCNTL_CHUNKS_SIZE is useful is a different discussion.
I myself would love to see features exposed via pragmas whenever
possible, for the simple reason that I don't use the C API and can't
make use of the features otherwise. I would assume that since the
SQLite developers added
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