On Wed, 25 Dec 2019 at 01:24, Clemens Ladisch wrote:
> Max Vlasov wrote:
> > bcc 5.5 compiler ... didn't like long long constants
> >such as -2251799813685248LL
>
> If you want to make this particular compiler happy, use
> -2251799813685248i64.
>
Thanks, this he
On Tue, 24 Dec 2019 at 23:58, Warren Young wrote:
> On Dec 24, 2019, at 12:32 PM, Max Vlasov wrote:
> >
> > I didn't mention it was for sqlite
> > static compiling with Delphi 32 bit, that supports (also quite old) OMF
> > static libraries format
>
> Woul
On Tue, 24 Dec 2019 at 21:37, Warren Young wrote:
> On Dec 24, 2019, at 3:19 AM, Max Vlasov wrote:
> >
> > an "ancient" bcc 5.5 compiler
>
> Yes, [almost 20 years old][1] now. Even in these times of slowing
> technology, that’s still a very long time in comput
Hi,
an "ancient" bcc 5.5 compiler perfectly compiled sqlite to win32 until
3.28.00, but starting 3.29.00 it appears it didn't like long long constants
such as -2251799813685248LL , mentioned at least in sqlite3RealSameAsInt
and sqlite3VdbeExec. The errors tells unrelated error messages, like [ )
e
On Thu, 18 Apr 2019 at 09:48, Hick Gunter wrote:
> So the QP is attemopting to determine which cost product is less:
>
> My guess is it will probably choose the undesired, invalid plan. A linear
> cost penalty for desired but optional inputs is probably not going to cut
> it. In this case, the re
On Wed, 17 Apr 2019 at 15:08, Hick Gunter wrote:
>
> SLEECT contents from textfiles where search_path = 'mypath' and
> name_pattern IN ('*.txt','*.csv');
>
>
It's interesting, I implemented the mask and decided to give such a query a
try (having the same cost adjust I explained in the first post)
On Wed, 17 Apr 2019 at 15:08, Hick Gunter wrote:
> ...
>
> SELECT contents from textfiles( 'mypath', NULL, 0);
> SELECT contents from textfiles where search_path = 'mypath' and
> is_recursive = 1;
> SLEECT contents from textfiles where search_path = 'mypath' and
> name_pattern IN ('*.txt','*.
On Wed, 17 Apr 2019 at 12:52, Hick Gunter wrote:
> Your xBestIndex function should be returning a cost that is proportional
> to the "effort required to fulfill the query". My own VT implementations
> have been returning the total number of records for queries with no
> constraints and assuming a
Hi,
I'm trying to implement "optional incoming" parameters for my virtual
tables. It's when there are columns required, but also there are some
fine-tuning columns that should be noticed when provided in the query and
assumed some default if not. The system that I tried seems to work, but I
would
ones.
Max
On Fri, 15 Mar 2019 at 18:00, Richard Hipp wrote:
> On 3/15/19, Max Vlasov wrote:
> >
> > But 3.27.2 said
> > malformed database schema ({sqlite_autoindex_mytablename}_1) - orphan
> > index.
>
> This error message arises from enhanced early dete
Hi,
I have a database that used in software since probably 2010, there are many
variants of this database at my hd and everything was fine with it starting
3.6.10 through 3.26.00, I'm not sure about every version, but during the
version history, at least several was used to open it.
But 3.27.2 sa
On Fri, Oct 26, 2018 at 5:50 PM Clemens Ladisch wrote:
> > Аfter the exception is thrown
> > If I continue the execution
>
> You must return from the callback function normally, or abort the process.
> Anything else will corrupt SQLite's internal state.
>
>
Thanks, probably it's better
Hi,
I have a virtual table that raises an unhandled exception during a create
table ... as select * from {myvirtualtable} command, inside xColumn
callback. I already fixed the error inside my library to handle the
situation reasonably, but there's something I noticed for the non-handled
exception
On Fri, May 25, 2018 at 10:29 AM, x wrote:
> You could have interrupt checks just before the return of a result row
> yourself by creating a Step fct that called sqlite3_step and then checked
> for an interrupt. It’s when the sqlite3.c code’s being run interrupt is
> most needed. e.g. if a query
On Sat, May 5, 2018 at 1:19 PM, J Decker wrote:
> https://www.sqlite.org/c3ref/column_blob.html
>
> The sqlite3_column_type() routine returns the datatype code
>
Column api is not suitable for me since it relies on the actual data
provided, but I'm the one who calls sqlite3_result_* to provide
Hi,
What is the best way to map a field type as it is provided in create table
statement to sqlite3_result_* function call?
More specifically, I have a virtual table implementation where a raw table
data provided and the corresponding field definition part ([FieldA] TEXT,
[FieldB] FLOAT). Whe
Simon,
I think the Group by might work correctly, but sometimes (as in OP case)
would require a lot of rewriting (copy-paste). The key point here is that
the Window function doesn't change the set, but only allows wider access to
other rows of the set at the current row "time". So we just have to m
he SQLITE_CORE define) and use the
> EXTRA_INIT hook to do initialization.
>
> ---
> The fact that there's a Highway to Hell but only a Stairway to Heaven says
> a lot about anticipated traffic volume.
>
> >-Original Message-
> >From: sqlite-users [m
Hi,
I'm considering creating a virtual table or user function that might
possible work either as a loadable extension or as a general, statically
created one. In order to avoid repeating during developing, I thought that
I might use sqlite3_api_routines structure as a universal access to sqlite
cod
Hi,
I noticed an unexpected optimization at the sqlite side.
Currently I can not reproduce this with some arbitrary test data (probably
I will eventually). Anyway the logic behind this (pseudo-code query)
Select , (Select count(*) from LookUpTable where
LookUpTable.Value=TableValue) as StatC
I think it's possible with CTE.
Recently I wondered whether it would be possible to implement an operation
that might be called "an accumulated group by". It's when you enumerate the
rows and based on the values of the previous row and current row you apply
some new "group" value that can be used
On Tue, Mar 28, 2017 at 11:26 AM, Max Vlasov wrote:
>
>
> So, what is the maximum reasonable value of estimatedCost that will not
> turn sqlite into possible overflow errors while telling at the same time
> that I consider some variant very, very expensive? Or maybe changing chea
On Tue, Mar 28, 2017 at 12:51 PM, Dominique Devienne
wrote:
> On Tue, Mar 28, 2017 at 11:00 AM, Hick Gunter wrote:
>
> >
> > The "estimated cost" is described as "how many disk IO operations are
> > expected". Version higher than 3.8.2 allow setting an "estimatedRows"
> > (default: 25) and versi
Hi,
I sometimes use virtual tables to implement some kind of one-to-many
output. One of examples mentioned previously was the comma list virtual
table when a field containing comma-separated values might be used to
output rows of values from this list. Other example - performing
regexp-like query
On Tue, Nov 29, 2016 at 4:19 PM, Igor Tandetnik wrote:
That's the exact opposite of your interpretation. For backslash escapes,
> you need to rely on "facilities of your programming language". If you
> cannot, and must use raw SQL queries, there are still ways to represent
> arbitrary characters,
Reasonable enough,
I wonder why OP and other authors of the discussion
https://www.mail-archive.com/sqlite-users@mailinglists.sqlite.org/msg49355.html
was so sure about backslash escaping support, even Igor Tandetnik :)
On Tue, Nov 29, 2016 at 11:39 AM, Clemens Ladisch
wrote:
> Max Vla
Hi,
the search in the mailing list about the trim function reveals possible
escaping support for the second parameter of the function, but in my case
(sqlite 3.15.1)
trim(col, char(9))
works, while
trim(col,'\t')
does not.
Can someone clarify on that?
Thanks
Max
___
On Thu, Nov 10, 2016 at 1:51 PM, Dominique Devienne wrote:
> On Thu, Nov 10, 2016 at 11:38 AM, Max Vlasov wrote:
>
>> __imp_EnterCriticalSection
>
>
> Is this post [1] related to your issue?
> Maybe you're not using the 64-bit SDK too? --DD
thanks for mentioning.
Hi,
Trying to link sqlite object file generated by visual c++ command-line
compiler(cl.exe sqlite3.c /c) with the Delphi 64 bit executable, I
encountered that some functions by windows api used by sqlite contains
"___imp_" prefix (total: 7). This happened since recent delphi 64 bit
compilers accep
On Mon, Oct 24, 2016 at 4:28 PM, Wade, William wrote:
> It sounds like you've got a way forward on leaks via the malloc() system
> within the process space.
>
> 1) The region of the C process stack that was reached by some deep call stack.
> 2) Processor registers.
> 3) Process pages that were co
On Mon, Oct 24, 2016 at 1:36 PM, Richard Hipp wrote:
>
> Memsys5 is also faster than your global system memory allocator
> (before the extra overhead of zeroing, at least). But on the other
> hand, you have to know the maximum amount of memory SQLite will want
> at the very beginning, and that me
Simon, thanks
never heard of secure_delete, interesting, but probably no use in case
of VFS Layer that leaves only encrypted data on disk.
As for zero-malloc option, it looks promising.
On Mon, Oct 24, 2016 at 1:34 PM, Simon Slavin wrote:
>
> On 24 Oct 2016, at 9:58am, Max Vlasov wrote:
&
Hi,
in an application that implements encryption/decryption with VFS, what
is the best way to ensure that the memory of the application doesn't
contain decrypted data after the database is closed. So no side
application could retrieve sensitive information by reading this
process memory. Not only
On Thu, Mar 10, 2016 at 5:26 PM, Richard Hipp wrote:
> Perhaps your in-memory VFS was relying on some unspecified behavior
> that changed?
Some tests finally led to the source of my problems. When I implemented the
handlers of vfs interface before, I made xFileControl return SQLITE_ERROR
i
Thanks,
I suspect there's indeed some special behavior not obvious at the moment.
I'll try to gather some additional information if it's possible or detect
this specific behavior
On Thu, Mar 10, 2016 at 5:26 PM, Richard Hipp wrote:
> On 3/10/16, Max Vlasov w
Hi,
I have a compatibility problem with my vfs implementation of memory
databases. I once implemented it successfully probably with a version
3.6.something. Today I tried to create a new database using the same code
with the latest (3.11.1) version (the procedure is when no prior db data
exists,
On Mon, Dec 8, 2014 at 5:56 PM, Roger Binns wrote:
> On 12/07/2014 04:43 PM, David Barrett wrote:
>> so I'm curious if you can think of a way using the API (or any
>> other way) to essentially "nice" the process by inserting a short
>> "sleep" into whatever loop runs inside the VACUUM command.
>
>
>> I once implemented a virtual table "allvalues" that outputs all
>> database values with (hope self-explaining) fields
>>
>> TableName, TableRowId, FieldName, Value
>
> Could you expand on how you coped with the underlying database
> changing, and how you mapped virtual table rowids to the actual
On Thu, Dec 4, 2014 at 10:44 AM, Baruch Burstein wrote:
>
> Is it possible to somehow search for/replace a string in all columns of all
> tables?
>
Not particularity the answer to your question, but rather a method you
or others might use.
I once implemented a virtual table "allvalues" that outpu
On Wed, Oct 22, 2014 at 4:50 PM, dave wrote:
>
> > -Original Message-
> > From: sqlite-users-boun...@sqlite.org
> > [mailto:sqlite-users-boun...@sqlite.org] On Behalf Of Max Vlasov
> > Sent: Wednesday, October 22, 2014 5:25 AM
> > To: General Discussi
Hi,
my static linking with Delphi for 3.7.8 version now complains about
_beginthreadex_/_endthreadex_.
Quick search shows than everywhere there's a recommendation to use these
functions instead of API CreateThread if one plans to use Visual c run-time
(msvcrt).
All my previous linking with sqlite
On Tue, May 27, 2014 at 10:49 PM, Richard Hipp wrote:
> On Tue, May 27, 2014 at 10:50 AM, Richard Hipp wrote:
>>
>
> This time I build the 32-bit DLL using mingw instead of MSVC. (MSVC was
> still used for the 64-bit DLL.) So perhaps it will work correctly on
> WinXP. Please let me know one wa
On Fri, Feb 21, 2014 at 5:24 PM, Richard Hipp wrote:
> On Fri, Feb 21, 2014 at 7:29 AM, Max Vlasov wrote:
>
>> Is there a machine-readable (BNF or other) grammar as equivalent to
>> the current syntax diagrams?
>
> An updated version of all-bnf.html has now b
On Wed, May 7, 2014 at 6:31 PM, Richard Hipp wrote:
> On Wed, May 7, 2014 at 9:00 AM, Marco Bambini wrote:
>
>> What is the best way to know if a table has been created with the WITHOUT
>> ROWID option?
>>
>
>
> (1) You could send "SELECT rowid FROM table"
>
> (2) Run both "PRAGMA index_list
Hi,
noticed that attempt to open a database containing a view
Create vew ... with recursive ...
... with older (non-cte) versions of sqlite failed. The call to
open_v2 was ok, but any access for example to PRAGMA encoding led to
"malformed database schema" error. Although it came as no big
surpri
On Fri, Apr 18, 2014 at 8:08 PM, Andy Goth wrote:
> On 4/18/2014 12:29 AM, Max Vlasov wrote:
>>
>> So it seems like if general queries allow affinity automatical
>> selection while bind api does not have the corresponent function. I
>> know that I can analize inco
Hi,
The problem was with my program that automatically converts xml data
into an sqilte table. It looks for an attribute and appends a column
if it does not exists, but stating no particular type. All values were
appended with sqlite_bind_text. Everything was fine, but an index
created after this
On Tue, Apr 8, 2014 at 11:00 PM, big stone wrote:
> Hi,
>
> I did experiment splitting my workload in 4 threads on my cpu i3-350m to
> see what are the scaling possibilities.
>
> Timing :
> 1 cpu = 28 seconds
> 2 cpu = 16 seconds
> 3 cpu = 15 seconds
> 4 cpu = 14 seconds
>
If the info at
http://
On Mon, Apr 7, 2014 at 5:28 PM, Dominique Devienne wrote:
> So the only piece
> that's missing is an official way to use vtables "on the fly", and
> pass in to its xFilter method the value from the left-correlated value
> for each joined left value, so the resulting cursor can "iterate" the
> righ
On Sun, Apr 6, 2014 at 10:23 PM, Dominique Devienne wrote:
>
> If the answer to either question above is true, then a specialized
> vtable would be both more convenient and faster, no?
>
Hmm... If logical peculiarity of vtable approach (when
where-constrained queries might be larger than full-sc
On Sat, Apr 5, 2014 at 11:48 PM, Max Vlasov wrote:
>
> This works for an old version of sqlite (3.6.10), but today Dominique
> Devienne mentioned some doubt about this approach and I decided to
> test it with some data with a recent version of sqlite. With 3.8.4.3
> the same join
I mentioned several times a technique involving particular virtual
table implementation that allows interpreting comma-list fields as
tables.
Basically this techique uses a virtual table that virtually contains
all data possible, but useful only when it is constrained with WHERE
clause working log
On Fri, Apr 4, 2014 at 10:20 PM, peter korinis wrote:
> A data column in a link table contains comma-separated string data, where
>
> How do you 'parse' a table entry like: "4,66,51,3009,2,678, ." to extract
> these values and use them in an SQL statement, perhaps a WHERE id='66'?
>
>
In similar
On Mon, Mar 24, 2014 at 4:49 AM, piotr maliński wrote:
> I know it's bad. I'm trying to determine the cause of the difference, and
> if it's a "feature" of that SSD or a bug of some sort.
There was a very intensive discussion for a post labeled
"UPDATE/INSERTing 1-2k rows slower than expected". Y
On Fri, Mar 21, 2014 at 8:06 PM, Ben Peng wrote:
>
> I guess I will have to take the longer route, namely define a customized
> comparison function and translate user input internally.
>
There's an also virtual table method, probably not so easy to wrap the
head around, but this one allows using
On Fri, Mar 14, 2014 at 4:51 PM, Richard Hipp wrote:
>>
> In the original problem, there was already an index on the term for which
> the min() was requested.
>.
> Whit your CTE-generated random integers, there is not an index on the
> values. So "SELECT min(x) FROM..." does a linear search
On Thu, Mar 13, 2014 at 11:06 PM, Richard Hipp wrote:
>
> Once you do that, you'll see that the opcode sequence is only slightly
> different between the two. They should both run at about the same speed.
> I doubt you'll be able to measure the difference.
>
>
Actually a comparatively long (10,0
Many CTE queries are just some mini-algorithms with iteration and only
last row is required. I just wondered whether it's easy to do this
without "order by ... " of the outer query (also mentioned in my reply
about CTE sqrt). There's a solution, but the good news is that
probably one rarely needs s
On Sat, Mar 8, 2014 at 2:24 AM, big stone wrote:
> Ooups !
>
> Thanks to the awesome posts about "RPAD/LPAD", I understood that I could
> already create a "sqrt()" function for SQLite3 in interpreted python.
>
Yes, that discussion was inspiring :)
Looking at your task I also played with cte v
On Sat, Mar 8, 2014 at 10:52 AM, Max Vlasov wrote:
> On Fri, Mar 7, 2014 at 11:51 PM, Dominique Devienne
> wrote:
>>
>> basically register_function('rpad', 'x', 'y', 'printf(''%-*s'', y,
>> x)') would register
On Fri, Mar 7, 2014 at 11:51 PM, Dominique Devienne wrote:
>
> basically register_function('rpad', 'x', 'y', 'printf(''%-*s'', y,
> x)') would register a 2-arg function (register_function's argc-2)
> named $argv[0], which executes the following statement
>
> with args($argv[1], $argv[2], ... $arg
On Sat, Mar 8, 2014 at 2:16 AM, Clemens Ladisch wrote:
> Eduardo Morras wrote:
>> So, if a webapp that uses SQLite doesn't check it's input, functions that
>> renames SQLite internals can be injected
>>
>> SELECT register_simple_function('MAX', 1, 'DROP TABLE ?');
>
> Such a statement would not r
On Fri, Mar 7, 2014 at 6:39 PM, Clemens Ladisch wrote:
> Max Vlasov wrote:
>>
>> Nice suggestion. This probably falls into case when a small new part
>> needed on sqlite side
>
> Actually, no change to SQLite itself would be needed. It's possible
> to create an
On Fri, Mar 7, 2014 at 12:49 PM, Dominique Devienne wrote:
> I think what SQLite lacks is a syntax to define custom function like
> it does for virtual tables. Something like:
>
> create function rpad(x, y) using scripty_module as "return
> PRINTF('%-*s',y,x)";
>
Nice suggestion. This probably f
On Sun, Mar 2, 2014 at 5:21 PM, Elefterios Stamatogiannakis
wrote:
>
> Our main test case is TPCH, a standard DB benchmark. The "lineitem" table of
> TPCH contains 16 columns, which for 10M rows would require 160M xColumn
> callbacks, to pass it through the virtual table API. These callbacks are
>
Hi,
thanks for explaining your syntax in another post. Now about virtual
tables if you don't mind.
On Fri, Feb 28, 2014 at 8:24 PM, Eleytherios Stamatogiannakis
wrote:
>
> If we load into SQLite,
>
> create table newtable as select * from READCOMPRESSEDFILE('ctable.rc');
>
> it takes: 55 sec
On Fri, Feb 28, 2014 at 10:14 PM, Dominique Devienne
wrote:
> Can someone tell me how the statement below works?
>
>
> Thanks for any help on this. This is really puzzling to me. --DD
Very puzzling for me too
For any statement like this
select * from blablabla(123)
sqlite (3.8.3.1) prim
On Wed, Feb 26, 2014 at 12:33 PM, Fabrice Triboix
wrote:
>
> And even then, that would not explain why the journal file lingers after
> re-opening the database.
>
I remember asking a similar question. As long as I remember, the main
logical implication is that journal file presence is not a mark
On Fri, Feb 21, 2014 at 5:24 PM, Richard Hipp wrote:
> On Fri, Feb 21, 2014 at 7:29 AM, Max Vlasov wrote:
>
>>
>> The only one a little similar I found is
>> http://www.sqlite.org/docsrc/artifact/873cf35adf14cf34
>> ( mentioned as art/syntax/all-bnf.html )
&g
On Fri, Feb 21, 2014 at 4:47 PM, Richard Hipp wrote:
> On Fri, Feb 21, 2014 at 7:29 AM, Max Vlasov wrote:
>
>> Is there a machine-readable (BNF or other) grammar as equivalent to
>
> Not that I am aware of.
>
I just noticed the file ( bubble-generator-data.tcl )
www.sqli
Hi,
Is there a machine-readable (BNF or other) grammar as equivalent to
the current syntax diagrams?
http://www.sqlite.org/syntaxdiagrams.html
The only one a little similar I found is
http://www.sqlite.org/docsrc/artifact/873cf35adf14cf34
( mentioned as art/syntax/all-bnf.html )
but it's p
On Mon, Feb 17, 2014 at 7:00 PM, RSmith wrote:
>
>
> On 2014/02/17 09:59, Max Vlasov wrote:
>>
>> .
>> So
>>
>>Select nanosec() - nanosec() from ...
>>
>> returns non-zero values for most of the times, so there's no guarantee the
On Mon, Feb 17, 2014 at 2:27 PM, Simon Slavin wrote:
>
> On 17 Feb 2014, at 7:59am, Max Vlasov wrote:
>
> > So the nanosec example modified
> >
> > Select v-v from
> > (
> > Select nanosec() as v from TestTable
> > )
> >
>
On Mon, Feb 17, 2014 at 1:22 AM, James K. Lowden
wrote:
> On Fri, 14 Feb 2014 08:32:02 +0400
> Max Vlasov wrote:
>
> > From: Max Vlasov
> > To: General Discussion of SQLite Database
> > Reply-To: General Discussion of SQLite Database
> > Date: Fri, 14 Feb 20
Hi,
Some time ago when there was no "instr" functions, I looked at Mysql help
pages and implemented a user function "locate" as the one that allows
searching starting a particular position in the string. With two parameters
form it was just identical to "instr" only the order of parameters was
rev
On Fri, Feb 14, 2014 at 6:35 AM, James K. Lowden
wrote:
> > > select id, (select id from TestTable where id = abs(random() % 100))
> > > as rndid from TestTable where id=rndid
>
> On Thu, 13 Feb 2014 07:26:55 -0500
> Richard Hipp wrote:
>
> > It is undefined behavior, subject to change depending
On Thu, Feb 13, 2014 at 4:26 PM, Richard Hipp wrote:
> On Thu, Feb 13, 2014 at 4:45 AM, Max Vlasov wrote:
>
> > Hi,
> >
> > probably was discussed and modified before, but I still can not
> understand
> > some peculiarities with random column values.
> >
&
Hi,
probably was discussed and modified before, but I still can not understand
some peculiarities with random column values.
The table
Create table [TestTable] ([id] integer primary key)
populated with 100 default values (thanks to CTE now made with a single
query):
with recursive
autoinc(i
On Fri, Jan 24, 2014 at 9:16 PM, Ralf Junker wrote:
> On 24.01.2014 10:06, Max Vlasov wrote:
>
>> BCC 5.5 (freely downloadable) compiles any version of sqlite3 to
>> object files linkable to Delphi 5 and later, the only drawback I
>>
>> Don't know about DISQLite
On Thu, Jan 23, 2014 at 1:33 AM, dean gwilliam
wrote:
> I'm just wondering what my options are here?
> Any advice much appreciated.
> ___
My two cents...
Historically I took Aducom TDataSet-compatible classes
(http://www.aducom.com/cms/page.php?2 , aut
Hi,
A thought came to compare two computers of different platforms (ie
i386 vs ARM) using uniform approach. We take two binaries of the same
sqlite version compiled with the best c compilers for both platforms
and compare the time spent for identical operations using memory based
databases (to exc
Simon,
don't know what exactly wrong in your particular case, but I'd suggest
setting debugger breakpoints everywhere in your x-handlers and notice the
moment after which calls are ceased (or you get a error code).
Max
On Fri, Oct 4, 2013 at 6:07 PM, Simon wrote:
> Hi there,
>
> I'm currently
On Sat, Aug 31, 2013 at 10:14 PM, Richard Hipp wrote:
> On Sat, Aug 31, 2013 at 2:03 PM, Max Vlasov wrote:
>
>> Hi,
>>
>> I noticed that opening places.sqlite of my installation of Firefox
>> can't be made for example with sqlite 3.6.10, it says that
Hi,
I noticed that opening places.sqlite of my installation of Firefox
can't be made for example with sqlite 3.6.10, it says that file either
encrypted or invalid (everything ok for example with 3.7.15.2 and sure
firefox itself, it works :)).
This might be a failure of my particular installation
On Wed, Aug 28, 2013 at 5:11 PM, Igor Tandetnik wrote:
> On 8/28/2013 8:57 AM, Max Vlasov wrote:
> See the recent discussion at
>
> http://comments.gmane.org/gmane.comp.db.sqlite.general/83005
>
> It's not about trailing spaces, but about whether Title in GROUP BY resol
Hi,
the following query (notice the space at the end of the 3rd string)
Create table [TestTable] ([Title] TEXT);
INsert into TestTable (Title) VALUES ('simple text');
INsert into TestTable (Title) VALUES ('simple text');
INsert into TestTable (Title) VALUES ('simple text ');
select Trim(Title) a
On Fri, Jul 26, 2013 at 9:56 PM, Dušan Paulovič wrote:
> Thanks for suggestion, but:
> 1.) one object is not linked to one connection
>
If you have your own memory management, it's not a problem since the scheme
I described is basically just a storage of pointers. To free or not to free
(if the
Hi, Dušan
On Thu, Jul 25, 2013 at 2:39 PM, Dušan Paulovič wrote:
> Hello, is there a way to somehow set a connection life-time object?
> ...
>
>
> It would be fine to have something like:
> int sqlite3_set_lifetime_object(
> sqlite3 *db, /*db connection*/
> const char *zObjectN
On Tue, Jul 23, 2013 at 10:09 PM, Petite Abeille
wrote:
>
> On Jul 23, 2013, at 9:52 AM, Max Vlasov wrote:
>
> > Basically it's several tables implementing Object-Propery-Value metaphor
>
> Hurray! The Entity–attribute–value (EAV) anti-pattern!
>
>
pattern,
On Tue, Jul 23, 2013 at 1:38 PM, Dan Kennedy wrote:
> On 07/23/2013 02:52 PM, Max Vlasov wrote:
>
>> So
>> par adoxically probably the best type for universal field container is
>> REAL
>> (or NUMERIC) since it will accept data of any type, but has advantage
On Tue, Jul 23, 2013 at 1:32 PM, Clemens Ladisch wrote:
>
>
> But REAL will sort the strings '1', '10', '2' wrong.
>
What do you mean by "wrong"?
The test
CREATE TABLE testtable (id integer primary key, value real);
insert into testtable (value) values ('1');
insert into testtable (value) valu
I've created a kind of triple storage base with Sqlite db as the container.
Basically it's several tables implementing Object-Propery-Value metaphor.
There's only one field for data so thinking about generality I assumed that
the type for the data field should be TEXT of nothing since most of other
h/xUnfetch on the VFS level?
> >
> > Max
> >
> >
> >
> >
> >
> > On Mon, Apr 8, 2013 at 3:33 PM, Richard Hipp wrote:
> >
> > > On Mon, Apr 8, 2013 at 6:12 AM, Max Vlasov
> wrote:
> > >
> > > > But I
other
expects pointer to the data, the complexity of understanding will grow. Or
is there a simple way to disable xFetch/xUnfetch on the VFS level?
Max
On Mon, Apr 8, 2013 at 3:33 PM, Richard Hipp wrote:
> On Mon, Apr 8, 2013 at 6:12 AM, Max Vlasov wrote:
>
> > But I also noticed
n it should not expect this from client
that uses vfs
Max
On Mon, Apr 8, 2013 at 1:56 PM, Dan Kennedy wrote:
> On 04/08/2013 04:40 PM, Max Vlasov wrote:
>
>> On Mon, Apr 8, 2013 at 1:23 PM, Dan Kennedy
>> wrote:
>>
>>
>>> Right. But a VFS is not obliged to sup
On Mon, Apr 8, 2013 at 1:23 PM, Dan Kennedy wrote:
>
> Right. But a VFS is not obliged to support the new xFetch() and
> xUnfetch() methods (used to read data from a memory mapped file).
> And if it doesn't, SQLite will use xRead() exclusively.
>
> It always uses xWrite() to write - whether mmap
On Sun, Apr 7, 2013 at 2:12 PM, Max Vlasov wrote:
>
>
>
> On Thu, Apr 4, 2013 at 4:02 PM, Richard Hipp wrote:
>
>> We would like to encourage people to try out the new code and
>> report both success and failure.
>>
>
>
> Not particulary about this d
On Sun, Apr 7, 2013 at 3:55 PM, Chris Smith wrote:
> Possibly related:
> http://en.wikipedia.org/wiki/Thrashing_(computer_science)
>
>
That's an interesting direction. Surprisingly if one query
... site:microsoft.com "Thrashing" "memory-mapped"...
on google, he or she would find a forum topic "Me
don't know what's wrong with the link, I'm clicking the one from gmail
thread and it works. Other way is to google [Unresponsive system under some
file-mapping related conditions] and the first result is the thread link
Max
On Sun, Apr 7, 2013 at 2:25 PM, Jean-Christophe Deschamps
wrote:
> Hi M
On Thu, Apr 4, 2013 at 4:02 PM, Richard Hipp wrote:
> By making use of memory-mapped I/O, the current trunk of SQLite (which will
> eventually become version 3.7.17 after much more refinement and testing)
> can be as much as twice as fast, on some platforms and under some
> workloads. We would l
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