You could implement table level and even row locking locking yourself.
I recollect doing the equivalent many years ago by having a semaphore or
spinlock and a block of shared memory with the lock id's configured as
an AVL tree. It realized the equivalent of table and row locking on an
early OS
It was one of the poorly thought through concepts which slipped into the
ash can of history without mourners.
To be reliable such a tool needs to be integrated into the development
system so that a change in schema forces a remake of all affected
applications. With discipline and the appropri
e if instead of inserting an additional layer, the actual code could be compiled inline into the sourcing C file, thus a pre processor.
I'll give this a quick first pass when I get some free time, how difficult could it really be ?
would anyone be interested in this as a project?
d
alone, add on.
Fred
-Original Message-----
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 11, 2007 9:24 AM
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] multiuser DB on network share
An Sqlite redirector which runs as a daemon on the machine
hosting the
DB and h
My understanding is that he is advocating a compiler which would take
his definition of an Sqlite operation and generate correct Sqlite3 API
calls.
An existing wrapper could well satisfy his requirement.
Joe Wilson wrote:
I not sure what you mean by preprocessor, but if you mean a
"stored pro
An Sqlite redirector which runs as a daemon on the machine hosting the
DB and has an API which provides the Sqlite API calls for remote clients
would solve these networking problems and maintain application code
compatibility. The sqlite3_open call would detect that the DB was
remote and the r
An elegant explanation. Write a book about it!
Roger Binns wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Jay Sprenkle wrote:
This sounds exactly like what
causes the trashed shared MS Access databases I've seen and network locking
issues I see warnings about here.
No it isn't.
H
)???
This is great if this works, although I might still make the
socketserver for notifying when updates has been made.
Thank you for your replies.
John Stanton wrote:
Why not just use the SMB file locks if you are using the SMB networking?
Daniel Önnerby wrote:
Well.. I do not mean that I will
permission has been granted
by the socketserver. Once the INSERT/UPDATE has been made, another call
is made to the socketserver to unlock the database. The socketserver
will then notify the other clients that an update has been made.
Best regards
Daniel
John Stanton wrote:
That should work quite
st of
few PCs.
Dusan
-Original Message-
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 09, 2007 12:21 PM
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] multiuser DB on network share
That should work quite well. We use such a strategy to implement
remote, multi
That should work quite well. We use such a strategy to implement
remote, multi user access to Sqlite databases. the user is unconcerned
about locking or contentions.
In our case we made the server run on port 80 (HTTP) and use regular
HTTP protocol so that it easily penetrates firewalls. Th
Consider having multiple databases. One can have all the read only
tables for example and will therefore always be available for reading.
Dynamic tables would be in another.
You can increase the granularity by having more databases, perhaps as
many as one per dynamic table, depending on the i
Traditionally that is achieved by a doubly linked list. Each row
contains a pointer to the next and previous row and a null for the end
case. The linked list structure cannot fail regardless of the amount of
shuffling or the size.
Sean Payne wrote:
Suppose gui-users wanted to drag and drop r
An example of Sqlite use is in one of our applications ehere we output
from Sqlite in XML according to a predefined DTD (HTML is XML defined by
a particular DTD). It is achieved by a layer of software which calls
the Sqlite library API. The result is structured data which can be fed
to foreig
The sqlite3 program is just an application program using the sqlite
lbrary. If you have your own version of it is will be compatible with
all Sqlite V3 databases.
What changes with an Sqlite release is the library that you link into
your application.
T&B wrote:
Hi John,
But, then I need a
age
some of the products are still at 3.3.8. Doing a release is
a non-trivial undertaking.
John Stanton <[EMAIL PROTECTED]> wrote:
We were influenced by Deming's work on total quality. He advocates
fixing each problem the moment it is identified and taking great pains
never to shi
Why not just make a simple change to sqlite3.exe? You have the source.
T&B wrote:
Hi all,
Following up my earlier question, since no replies:
I want to use SQLite's html output option to deliver query results as
a series of HTML rows. But I also want to insert extra HTML tags in
the outpu
Bill King wrote:
Roger Binns wrote:
Im sorry for being so harsh, and i know im not winning any friends
here,
So far noone has agreed with you :-)
This would be incorrect. The correct statement is "so far no one has
vocally agreed with you".
If people didn't agree, this whole once a
You are experiencung the ACID feature of Sqlite. To insert faster group
your inserts into a single transaction.
Sean Payne wrote:
Hi,
I'm new to the list and to SQLITE. I am using it as a backend for a
gui program I'm working on.
However, I am measuring a single trivial insert using the C
s
thout error and there is still a
reasonable level of safety checking for users who do not synchronise
properly.
Emerson
On 1/5/07, John Stanton <[EMAIL PROTECTED]> wrote:
Work on turning "reasonable" into "adequate" or "good" and it will help
you get an intuitiv
We were influenced by Deming's work on total quality. He advocates
fixing each problem the moment it is identified and taking great pains
never to ship product with defects. That way quality is maximized, The
short term invonvenience is swamped by the long terms advantages.
I would agree wi
uld be designing for, not
the hardware...
As it happens, the newest generation of PC's are all multi-core, and i
have been working on multi processor environments for many years.
Emerson
On 1/4/07, John Stanton <[EMAIL PROTECTED]> wrote:
If Emeroson intuitively understood the esse
If Emeroson intuitively understood the essential architecture of the PC
he is using he would not be having difficulty with his concept of how to
use it. It is essentially a serial device, multi-tasking device and
parallelism in the forms of threading and multi processing is a
sophistication ad
My original use of this method was in a program which would literally
run for years. An implementation which would checkerboard the heap
would ultimately cause problems despite the absence of leaks.
Both Unix and Windows support this POSIX feature, and both permit
anonymous allocation so it i
A very simple and efficient method of holding temporary results is to
just read it into a temporary file which is memory mapped. The VM
manager takes care of the memory buffering so you do not have to be
concerned about upper size limits being constrained by memory resources.
The file can be
A step performs a get of the next row. Whether it is next of previous
depends upon the SQL.
Ohad Eder-Pressman wrote:
after a query i get back the result set.
it looks like i can only do a 'step' to move one record forward.
is there any way i can move back and forward to any index i like ?
i
You need to count the number of rows as you sqlite3_step and get each
one. A DB only knows how many rows are in a selection after it has read
them all.
Ohad Eder-Pressman wrote:
just started using sqlite through a c++ wrapper.
i need to be able to know how many rows are contained in a result,
Good advice. If you want to experiment with a certain architecture,
write the programs yourself rather than trying to get others to do it
for you. Sqlite is a well thought through solution for an embedded
database with a wide range of applications, but if you want something
more specialised,
Unless you have a multi processor machine or some form of parallel
processing I cannot see how you can do anything other than slow your
procesing by adding threading overhead.
You can simplify the conception of the whole process by understanding
that Sqlite writes to a single file on a single
I am curious as to how multiple threads would perform faster inserts
into an Sqlite database, which is a single file plus the journal.
Are you using a multiple processor machine?
Emerson Clarke wrote:
Roger,
Thanks for the suggestions. I think using a worker thread and a queue
would be equiv
that I did not
write.
The truth is it's probably too late for SQLite3 to have an official
DATE type since the API is more or less frozen. Such a new type could
only be added in a hypothetical SQlite4 - which may never happen.
I give up.
--- John Stanton <[EMAIL PROTECTED]> wrote:
If
ite supported an official
DATE type, such inconsistancies could be avoided, and the underlying storage
of DATEs could be consistant across all applications and could potentially
be stored in a more space-efficient form in the database file, as an added
bonus.
--- John Stanton <[EMAIL
r reasons
of space-efficiency and programmer simplicity it would be an extremely
useful feature if SQLite added "DATE" to its list of built-in types.
Just as the SQLite authors saw the merit of adding integers, doubles
and blobs to SQLite 3 from the text-only SQLite 2, I believe there
is a
date/time type in SQLite would be a good feature.
--- John Stanton <[EMAIL PROTECTED]> wrote:
Everybody? Most Sqlite users know that Sqlite implements a DATE type
and has date support functions.
Karsten Koschinski wrote:
Hey,
I have a database with a field where dates are stor
your
own user functions for more detailed date manipulation.
Anderson, James H (IT) wrote:
Where are the date support functions documented?
-Original Message-
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: Tuesday, December 26, 2006 12:40 PM
To: sqlite-users@sqlite.org
Subject: Re
Everybody? Most Sqlite users know that Sqlite implements a DATE type
and has date support functions.
Karsten Koschinski wrote:
Hey,
I have a database with a field where dates are stored! As everybody knows
SQLite has no special date support such as a special datatype for date or
something e
VDBE code already
exists so that is not an uncharted route.
Eduardo Morras wrote:
At 17:00 24/12/2006, you wrote:
On Sun, Dec 24, 2006 at 09:35:01AM -0600, John Stanton wrote:
> >There is even a starting grammar for you:
> > http://www.antlr.org/grammar/1107752678378/PLSQLGr
Andrew Piskorski wrote:
On Sun, Dec 24, 2006 at 09:35:01AM -0600, John Stanton wrote:
There is even a starting grammar for you:
http://www.antlr.org/grammar/1107752678378/PLSQLGrammar.g
A compiler for a subset of PL/SQL would not be too arduous a project,
If what you want is something
A compiler for a subset of PL/SQL would not be too arduous a project,
and a code generator into VDBE would, as you suggest, give an insight
into what extra opcodes would be desirable to produce dense PL/SQ.
Obviously the SQL component and optimization is already handled.
I can see that the maj
There has been discussion about extending Sqlite to have more functions,
but the risk is creating Sqlite-Bloat and losing the most endearing
feature of the product, its light weight and simplicity.
Here is an interesting and thought provoking discussion on the general
subject. A good case is
Your program does not free the memory malloc'd by sqlite3_errmsg by
calling sqlite3_free. I guess that Valgrind is telling you that. You
don't have to worry about Sqlite.
Jose Miguel Goncalves wrote:
Hi,
Running a simple sqlite3_open()/sqlite3_close() program (attached) I get
a report of a
We have a rule which gets anyone who says "it would be easiest to..." is
sent to the sin bin until they learn to way "the best way to do this is
...".
The best way generally turns out to be the easiest, but the easiest
never turns out to be the best.
Tom Briggs wrote:
I'm sure that anyth
Well put. If Sqlite were turned into a junior Oracle, DB2 or PostgreSQL
then someone else would have to create a new Sqlite to handle the
lightweight embedded RDBMS role!
It is very simple to add functions to Sqlite, and since it is a library
you link into your application there is no reason
It is the same problem as trying to get a quart out of a pint bottle.
People looking for durability and higher performance might find that
using 15,000 RPM disks will do it without affecting durability or
requiring an application redesign. Experimentation with multiple disk
spindles so that S
Look here -
http://www.sqlite.org/lang_transaction.html
LuYanJun wrote:
> Thanks, But I step the instruction fellow the hint by offcial document by
> which said that's correct(BTW forgive me my poor english ):
> http://www.sqlite.org/concurrency.html
> 4.1 Read-only transactions
> BEGIN READ_ONLY
I answered your question. It is possible and showed you how to do it.
The rest is up to you.
RB Smissaert wrote:
I am not into C and I want to stay clear from compiling SQLite.
Or do I misunderstand this?
RBS
-Original Message-
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 17
Have a look at Sqlite date code. I just lifted its data structures and
used its functions to build user functions to give month etc. The
algorithms are accurate and they are easy to use. I found setting up
user functions to do those calculations made the SQL simpler.
The functions are in a
I can imagine that before long all firefighters will have internet
connected equipment. A handheld device with broadband access and GPS is
an obvious move forward, both for safety, for rapid deployment of
resources and for access to maps and logistics.
To design what you are doing now for the
I would endorse Roger's comments. A web interface can give you
everything you can get from a stand-alone application but also gives you
flexibility.
The greatest advantage of the web application is that you have no
software loading onto PCs, a real nuisance. As long as the browser
works you
Dixon Hutchinson wrote:
The basic problem is that I am getting SQLITE_BUSY on a call to
sqlite3_exec where the SQL passed is simply "COMMIT;"
Notes:
1. This in on a WIN32 platform.
2. There is only one process (the main process) that makes any calls
to sqlite3 for the DB in question.
The questioner might find that user functions will extend the capability
to do what he wants without implementing new SQL syntax.
Joe Wilson wrote:
http://www.sqlite.org/cvstrac/fileview?f=sqlite/src/parse.y&v=1.210
--- Dusan Gibarac <[EMAIL PROTECTED]> wrote:
What are our options to extend o
How do you set the working directory? Where is your Sqlite DB file?
You are just opening a file name, not a pathname so your working
directory is whatever your web server uses for CGI data.
Francesco Andrisani wrote:
Hi comunity,
i have the follow problem.
I've insert into a C-CGI page a sma
If you are using a B-Tree index for a file system why incorporate
Sqlite, why not just write the file system code? B-Trees are well
documented.
Cesar Rodas wrote:
I am developing a File System, and I'd like to use B+ Tree and not lost
time
and CPU understanding SQL...
On 13/12/06,
It is hard to imagine why you would want to use Sqlite B-Tree access.
Kees Nuyt wrote:
On Wed, 13 Dec 2006 13:02:37 -0400, you wrote:
I mean the SQLite Core API, something like Berkeley DB.
I'd like to use SQLite B+tree API.
It has quite recently been discussed, you may want to try to
sear
The Sqlite API is fully documented and the source code is clearly
written and commented and reads quite simply as a definition of its
philosophy and function.
Cesar Rodas wrote:
I mean.. is there a manual that explain how to use SQLite Core in low level
API, like berkeley DB, without SQL.
Tha
the Sqlite cache.
Kees Nuyt wrote:
On Mon, 11 Dec 2006 19:50:52 -0600, John Stanton wrote:
Use a Unix read or a Windows API ReadFile and read the whole file
in one call.
Find the size of it using a Unix lseek or
Win32 API GetFileSize call. You will certainly
pull the whole file into VM that
Could be an FTP in ASCII mode copy problem.
[EMAIL PROTECTED] wrote:
"Rob Coenen" <[EMAIL PROTECTED]> wrote:
yes that is what I tried; I did use sqlite3
does not work. Any known problems on moving db files from Win to Linux?
SQLite database files are cross-platform. They work on linux,
wi
Cursors as such are not implemented. You can achieve the function of a
cursor from Sqlite with some thought.
Jim Crafton wrote:
Does the latest version of sqlite have cursors? If so, where might I
find docs on using them?
Thanks
Jim C
Use a Unix read or a Windows API ReadFile and read the whole file in one
call. Find the size of it using a Unix lseek or Win32 API GetFileSize
call. You will certainly pull the whole file into VM that way.
Jay Sprenkle wrote:
On 12/11/06, Dennis Cote <[EMAIL PROTECTED]> wrote:
Simply read
I agree with you 100%. Statically linking Sqlite to applications gives
you some freedom from "DLL HELL" and "REV LOCK SHOCK" and can only
result in inefficiency if you have multiple different application
programs using Sqlite on the individual workstation.
To my way of implementing KISS, usin
Maybe your statement does not reference a valid row.
Marten Feldtmann wrote:
I have written some interface code to the sqlite3 API using the
OpenWatcom 1.5 compiler and I wrapped several functions like
sqlite3_column_text, sqlite3_column_int and all went fine.
Then I tried to wrap sqlite3_colum
in this case would just save a reference to
another blob if it's identical. I guess this could save a lot of space
without any fancy decompression algorithm, and if the blob-field is
already indexed there would be no extra time to locate the other
identical blobs :)
Just a thought :)
Nicolas Williams wrote:
On Wed, Dec 06, 2006 at 11:36:11AM -0600, John Stanton wrote:
I fully understood. It is an age old problem that has puzzled
generations of system designers. My first exposure was over thirty
years ago. The approach we discovered worked was to treat it as a
Nicolas Williams wrote:
On Wed, Dec 06, 2006 at 10:06:12AM -0600, John Stanton wrote:
Marten Feldtmann wrote:
But Tcl is not part of SQLite (and this is good) - this is just an
add-on. The idea with the
additional functions are pretty good !
How does Sqlite become Sqbloated? By function
Nicolas Williams wrote:
On Wed, Dec 06, 2006 at 10:04:42AM -0600, John Stanton wrote:
hongdong wrote:
I just have a base question:
assume user A and user B now both connection to a same database and both of
them want to update a same record,but only one is allowed
in this condition:
A
Marten Feldtmann wrote:
Ulrich Schöbel schrieb:
SQLite includes a Tcl API. Tcl does all these conversions with ease.
See the encoding convertto/convertfrom commands and fconfigure
But Tcl is not part of SQLite (and this is good) - this is just an
add-on. The idea with the
additional functio
hongdong wrote:
I just have a base question:
assume user A and user B now both connection to a same database and both of
them want to update a same record,but only one is allowed
in this condition:
A begin to browse the data in a client application,and load rowid into GUI
and keep it in memory.
Youm need to contact Dr Hipp about that. I understand he has a special
embedded version of sqlite which omits the compiler and uses
pre-compiled VDBE code to reduce the footprint.
Kalyani Tummala wrote:
Hi,
In one of the group mails I have read about precompiled queries to
improve the perfor
Kevin Waterson wrote:
This one time, at band camp, "Trevor Talbot" <[EMAIL PROTECTED]> wrote:
I'd store the IPs in the DB in integer form as Lloyd suggested, if
range queries are your goal. Do conversion to and from display format
in the application.
Yes, they are stored as INTEGER. and
Kevin Waterson wrote:
This one time, at band camp, John Stanton <[EMAIL PROTECTED]> wrote:
Are you actually searching for membership in a class A, B or C network
or perhaps a subnet? If you are you can use the dotted format to your
advantage.
No, The search is for which registry ow
Kevin Waterson wrote:
This one time, at band camp, John Stanton <[EMAIL PROTECTED]> wrote:
It looks as if you are looking to see if an address belongs to a
particular class B network. Are all your searches done that way?
If they are you may be able to use a regular expression to d
Kevin Waterson wrote:
This one time, at band camp, "Igor Tandetnik" <[EMAIL PROTECTED]> wrote:
I don't quite understand. To continue your example, exactly which IP
addresses are considered to fall into the range "65536"? How do you
figure 1.2.3.4 is in this range, if indeed it is?
The beggi
It is a very common algorithm. From memory it is implemenented in
Sqlite, for example.
[EMAIL PROTECTED] wrote:
can convert to seconds since start of epoch, do the arithmetic,
then convert back
Don't get you. It would be quite a calculation, with leap years etc.
RBS
On Sun, Dec 03, 2006
What are you using for compression?
Have you checked that you get a useful degree of compression on that
numeric data? You might find that it is not particularly amenable to
compression.
Hickey, Larry wrote:
I have a blob structure which is primarily doubles. Is there anyone with
some exper
dates are fine as well
when
dumped in an Excel sheet.
RBS
-Original Message-----
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 04 December 2006 00:41
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] Dealing with dates in the format mmdd
I suspect that you are not using the Inte
How about running a daemon on your machine which gets the request from
your user defined function, does the lookup with a persistent connection
and asynchronously updates the row in the DB? It does not need to be a
daemon, it could be a thread in your program if that is more apprpriate.
When
in an Excel sheet.
RBS
-Original Message-
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 04 December 2006 00:41
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] Dealing with dates in the format mmdd
I suspect that you are not using the Interbase date type, which is a 64
bit o
al Message-----
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 03 December 2006 23:30
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] Dealing with dates in the format mmdd
I know nothing of Interbase, but cannot imagine that it does not have a
set of date manipulation functions.
RB
Have you tried using lsof to report what is holding your file open?
Can you copy the file?
Max Barry wrote:
Christian Smith wrote:
Max Barry uttered:
My database is permanently locked, and I've spent two fruitless days
trying to unlock it.
You haven't said what sort of box this is. I
Five date and time functions are available, as follows:
1. date( timestring, modifier, modifier, ...) ?
Will give that a go.
RBS
-Original Message-
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 03 December 2006 20:46
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] Dealing wi
Message-
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 03 December 2006 20:03
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] Dealing with dates in the format mmdd
It looks like Interbase uses a traditional date format based on an
epoch. That is a system where a base date is set
his means given
the year, the month number and day number you can make a date?
RBS
-Original Message-----
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 03 December 2006 18:23
To: sqlite-users@sqlite.org
Subject: Re: [sqlite] Dealing with dates in the format mmdd
What do you m
t have the integer
format mmdd. How would I convert that (at import) to the SQLite date
format? I do the import via an ADO recordset and then move the data via
SQLite inserts.
RBS
-Original Message-----
From: John Stanton [mailto:[EMAIL PROTECTED]
Sent: 03 December 2006 17:01
To: sq
Why not use the internal Sqlite date format. Then date processing is
straight forward and you can use the conversion routines to present it
in the various national and ISO formats.
Sqlite uses a very correct date storage format based on an epoch way
back in antiquity so that you can present i
You send it SQL statements. It has to parse and compile them for
execution. The parser understands the grammar of SQL and applies it.
Noah Hart wrote:
Hello all,
I've read the documentation, and the wiki and the pages at
http://www.sqlite.org/compile.html
However, I cannot find what is the
Eduardo Morras wrote:
At 09:34 01/12/2006, you wrote:
Hi there,
we are on an challanging project with very high requirements on
performance.
When doing some debugging we discover, that the sqlite method for
creating
an memory-based database is much slower than using e.g /dev/shm on
linux or
to indulge in that nonsense any more.
Rob Sciuk wrote:
On Fri, 1 Dec 2006, John Stanton wrote:
I cannot see a reason for what you propose, but you could do it by
brute force and ignorance - populate the DB with 1 million rows then
delete them all to add all the space to the free pages list.
You might discover that a memory based database has few advantages over
a disk based one, since Sqlite uses cacheing and the OS uses virtual
memory file cacheing. The main difference might be initial accesses
being slower while the cache fills up.
I understand that Sqlite uses a less efficien
I cannot see a reason for what you propose, but you could do it by brute
force and ignorance - populate the DB with 1 million rows then delete
them all to add all the space to the free pages list. Then your
insertions will use the freed pages, not fresh ones.
kamil wrote:
I want to preallocat
You could look at the Sqlite data structures and write a program to
build the free pages list. I still don't understand why you need to
pre-allocate space.
If you are using Linux or Unix you can make a file system of a fixed
size for the DB. On Windows you could partition the disk into a dri
Tummala wrote:
Hi John,
Thanks for your help. I have another doubt? If I turn off the sql
compiler, should I have to fix my insert,delete,select,update
operations? My operations are almost fixed in nature. Can you tell me
how exactly I do this?
-Original Message-
From: John Stanton [mailto
Dave Dyer wrote:
At 08:04 PM 11/30/2006, John Stanton wrote:
Those are Macintosh issues, not Sqlite, and you need to handle them in your
application.
Yes indeed. I'm only suggesting that sqlite would be a better
substrate if it provided a supported way to tell me "I can&
Those are Macintosh issues, not Sqlite, and you need to handle them in
your application.
Dave Dyer wrote:
t
??? Sqlite is agnostic about file names. Give it a pathname to suit the
underlying file system and it is happy. You might be using some wrapper that
messes with pathnames, but that
Dave Dyer wrote:
I discovered when I started testing my model that it created a file called '
.db'. It took me a while to figure out the error. Now, I test for empty
databases and empty fields before trying to use them. :-)
It goes deeper. I did install a "file exists" check pretty early in
Once it is explained a bug becomes a feature and at worst an annoyance. :-)
It is a tiny change to Sqlite to make it the way you want it to work.
In my systems I have not changed Sqlite but instead put a jacket around
sqlite3_open and tested first for the existence of the file if I don't
want
As Igor very astutely pointed out, the other very strong benefit of this
approach is that you always bind to a compiled SQL statement and
quarantine your application from the possibility of having a malicious
SQL attack. You win on all counts.
John Stanton wrote:
Sqlite3_exec is merely a
You might find that a version of Sqlite which omits the compiler might
fit your application. You get a smaller footprint, but at the cost of
having to use pre-compiled SQL, which means that you cannot dynamically
create SQL.
Kalyani Tummala wrote:
Hi,
This mail is a bit lengthy. I thank you
Sqlite3_exec is merely a wrapper around sqlite3_prepare. The name on
sqlite3_prepare is a little misleading. It is actually sqlite3_compile
and compiles your SQL into an internal metacode and applies syntax
rules. Incorrect SQL will fail on sqlite3_prepare and you can make your
program more
Lloyd wrote:
Hi,
How much time can it take to perform 2000 selection queries on the
same database ? Mostly the result set will contain only 1 raw. Is there
is any way to improve the selection speed?
Thanks,
Lloyd
__
Scanned and protected by Email scanne
Kirrthana M wrote:
Hi,
Im new to sqlite,i have written a program to create a table and perform
the following operations
Insert,Delete,search.
To perform a search i used the query SELECT along with
sqlite3_exec..Execution is successful but the result is not displayed in the
screen.how to retriev
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