RE: [sqlite] Limit statement size?
--- RB Smissaert <[EMAIL PROTECTED]> wrote: > Thanks, that is how I understood it to be. > I must be overlooking something simple here. Check your SELECT sub-statement within the REPLACE statement to see what rows it returns. .header on .mode tabs create table t1(id primary key, e2_a, e2_b, e3_a, e3_b); insert into t1 values(3, 30,31, 23,230); insert into t1 values(4, 40,41, 24,240); insert into t1 values(5, 50,51, 25,250); create table e2(id primary key, a, b); insert into e2 values(3, 300, 310); insert into e2 values(4, 400, 410); insert into e2 values(5, 500, 510); create table e3(id primary key, a, b); insert into e3 values(3, 23.1, 230.1); insert into e3 values(4, 24.1, 240.1); insert into e3 values(5, 25.1, 250.1); select * from t1 order by id; replace into t1(id, e2_a, e2_b, e3_a, e3_b) select t1.id, e2.a, e2.b, e3.a, e3.b from t1, e2, e3 where t1.id = e2.id and t1.id = e3.id; select * from t1 order by id; id e2_ae2_be3_ae3_b 3 30 31 23 230 4 40 41 24 240 5 50 51 25 250 id e2_ae2_be3_ae3_b 3 300 310 23.1230.1 4 400 410 24.1240.1 5 500 510 25.1250.1 > > RBS > > -Original Message- > From: Gerry Snyder [mailto:[EMAIL PROTECTED] > Sent: 29 January 2007 23:52 > To: sqlite-users@sqlite.org > Subject: Re: [sqlite] Limit statement size? > > RB Smissaert wrote: > > Had a go at this, but sofar I haven't been able yet to get it to work. > > I get no error, but A3Test115_J remains just at it is. > > I couldn't find much information about INSERT OR REPLACE in the SQLite > > documentation. What exactly should it do? > > It will try to do an INSERT. If the PATIENT_ID field is already in the > file, it will delete the old conflicting entry before inserting. > > The best write-up is at: > > http://sqlite.org/lang_conflict.html > > > HTH, > > Gerry No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile. Get started. http://mobile.yahoo.com/mail - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] SQLite documentation
On 1/29/07, Clark Christensen <[EMAIL PROTECTED]> wrote: Puneet, How about "make doc"? If you have TCL, that seems to generate the HTML output in ./doc. If you don't, I'd be happy to send it to you. Thanks Clark. I had, and it did. Me happy. I am wondering though, how would I have known this if Clark hadn't shown me how? I did ./configure --help, and that didn't seem to point me anywhere. I poked around on sqlite.org, and didn't find anything there as well. Maybe I missed something obvious... - Original Message From: P Kishor <[EMAIL PROTECTED]> To: sqlite-users@sqlite.org Sent: Monday, January 29, 2007 10:13:05 AM Subject: [sqlite] SQLite documentation Isn't there a way to generate html documentation for SQLite from the source files? I have a www folder with a bunch of Tcl files (which seem like I need to run them through Tcl to get html out), but no html. I am missing something obvious, so please point me in the right direction. -- Puneet Kishor http://punkish.eidesis.org/ Nelson Inst. for Env. Studies, UW-Madison http://www.nelson.wisc.edu/ Open Source Geospatial Foundation http://www.osgeo.org/education/ - collaborate, communicate, compete = - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] SQLite documentation
Puneet, How about "make doc"? If you have TCL, that seems to generate the HTML output in ./doc. If you don't, I'd be happy to send it to you. -Clark - Original Message From: P Kishor <[EMAIL PROTECTED]> To: sqlite-users@sqlite.org Sent: Monday, January 29, 2007 10:13:05 AM Subject: [sqlite] SQLite documentation Isn't there a way to generate html documentation for SQLite from the source files? I have a www folder with a bunch of Tcl files (which seem like I need to run them through Tcl to get html out), but no html. I am missing something obvious, so please point me in the right direction. -- Puneet Kishor http://punkish.eidesis.org/ Nelson Inst. for Env. Studies, UW-Madison http://www.nelson.wisc.edu/ Open Source Geospatial Foundation http://www.osgeo.org/education/ - collaborate, communicate, compete = - To unsubscribe, send email to [EMAIL PROTECTED] - - To unsubscribe, send email to [EMAIL PROTECTED] -
RE: [sqlite] Limit statement size?
Thanks, that is how I understood it to be. I must be overlooking something simple here. RBS -Original Message- From: Gerry Snyder [mailto:[EMAIL PROTECTED] Sent: 29 January 2007 23:52 To: sqlite-users@sqlite.org Subject: Re: [sqlite] Limit statement size? RB Smissaert wrote: > Had a go at this, but sofar I haven't been able yet to get it to work. > I get no error, but A3Test115_J remains just at it is. > I couldn't find much information about INSERT OR REPLACE in the SQLite > documentation. What exactly should it do? It will try to do an INSERT. If the PATIENT_ID field is already in the file, it will delete the old conflicting entry before inserting. The best write-up is at: http://sqlite.org/lang_conflict.html HTH, Gerry - To unsubscribe, send email to [EMAIL PROTECTED] - - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] Limit statement size?
RB Smissaert wrote: Had a go at this, but sofar I haven't been able yet to get it to work. I get no error, but A3Test115_J remains just at it is. I couldn't find much information about INSERT OR REPLACE in the SQLite documentation. What exactly should it do? It will try to do an INSERT. If the PATIENT_ID field is already in the file, it will delete the old conflicting entry before inserting. The best write-up is at: http://sqlite.org/lang_conflict.html HTH, Gerry - To unsubscribe, send email to [EMAIL PROTECTED] -
RE: [sqlite] Limit statement size?
Had a go at this, but sofar I haven't been able yet to get it to work. I get no error, but A3Test115_J remains just at it is. I couldn't find much information about INSERT OR REPLACE in the SQLite documentation. What exactly should it do? RBS -Original Message- From: Joe Wilson [mailto:[EMAIL PROTECTED] Sent: 28 January 2007 20:37 To: sqlite-users@sqlite.org Subject: RE: [sqlite] Limit statement size? I forgot to specify the unique key for the table to be updated in the first attempt at INSERT OR REPLACE. Please try this... insert or replace into A3Test115_J( PATIENT_ID, ---<--- ENTRY_ID_E2, READ_CODE_E2, TERM_TEXT_E2, ... NUMERIC_VALUE_E15 ) select t1.PATIENT_ID, ---<--- g2.ENTRY_ID, g2.READ_CODE, g2.TERM_TEXT, ... g15.NUMERIC_VALUE from A3Test115_J t1, GROUP_2 g2, GROUP_3 g3, ... GROUP_15 g15 where t1.PATIENT_ID = g2.PID and t1.PATIENT_ID = g3.PID and t1.PATIENT_ID = g4.PID and t1.PATIENT_ID = g5.PID ... and t1.PATIENT_ID = g15.PID --- RB Smissaert <[EMAIL PROTECTED]> wrote: > Thanks, will have a look at that. > It definitely looks better. > > RBS Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. http://tools.search.yahoo.com/toolbar/features/mail/ - To unsubscribe, send email to [EMAIL PROTECTED] - - To unsubscribe, send email to [EMAIL PROTECTED] -
[sqlite] Hexadecimal literals or MAX_INTEGER definition?
Does sqlite support numeric literals in hexadecimal? e.g.INSERT INTO table(mask) VALUES (0x); Additionally, is there a constant like MAX_INTEGER defined which I can use as the maximum value that an INTEGER field supports (assuming that types actually exist)? Regards, Brodie - To unsubscribe, send email to [EMAIL PROTECTED] -
[sqlite] Memory database to file
Hi,
I've got an application that creates a database with a large number of records
(millions), and the indexation of the tables is taking a long time. Once the
database is initially created, it is never modified. No records are added or
deleted. So, in the case where a user has sufficient memory, I want to offer
the option to create the entire database in memory, including the indexes, and
then serialize that to disk. I am not sure if this is really going to work or
if it will be more effcient. I am using the "ATTACH DATABASE" command to
create a copy of my ":memory:" database. I can copy copy the tables (see
below), and I can get a list of the indxes (see further below), but I don't
know how to copy the indexes. Also, does anyone know if this method is really
going to be faster (memory db -> disk db) than doing everything with a disk db?
Would the indexes really be copied or just re-created?
//get the list of tables
sql_cmd = "SELECT name FROM SQLITE_MASTER WHERE type = 'table'";
rc = sqlite3_prepare( m_db, sql_cmd.c_str(),(int)sql_cmd.length(), ,
);
std::vector tables;
rc = sqlite3_step(stmt);
while ( rc != SQLITE_DONE && rc != SQLITE_ERROR )
{
tables.push_back((const char*) sqlite3_column_text ( stmt,0 ));
rc = sqlite3_step(stmt);
}
sqlite3_finalize(stmt);
//get the list of indexes
sql_cmd = "SELECT name, tbl_name FROM SQLITE_MASTER WHERE type = 'index'";
rc = sqlite3_prepare( m_db, sql_cmd.c_str(),(int)sql_cmd.length(), ,
);
std::vector> indexes;
rc = sqlite3_step(stmt);
while ( rc != SQLITE_DONE && rc != SQLITE_ERROR )
{
indexes.push_back(std::pair((const char*) sqlite3_column_text
( stmt,0 ), (const char*) sqlite3_column_text ( stmt,1 )));
rc = sqlite3_step(stmt);
}
sqlite3_finalize(stmt);
rc = sqlite3_exec(m_db,"begin;", callback, 0, );
//copy the tables
for (vector::const_iterator it = tables.begin(); it != tables.end();
it++)
{
string sTable = *it;
sql_cmd = "CREATE TABLE dbdisk." + sTable + " AS SELECT * FROM " + sTable +
";";
rc = sqlite3_exec(m_db,sql_cmd.c_str(), callback, 0, );
}
//copy the indexes
for (vector>::const_iterator it = indexes.begin(); it
!= indexes.end(); it++)
{
string sIndex = (*it).first;
string sTable = (*it).second;
//to be filled in
}
rc = sqlite3_exec(m_db,"commit;", callback, 0, );
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with the Yahoo! Search weather shortcut.
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[sqlite] SQLite documentation
Isn't there a way to generate html documentation for SQLite from the source files? I have a www folder with a bunch of Tcl files (which seem like I need to run them through Tcl to get html out), but no html. I am missing something obvious, so please point me in the right direction. -- Puneet Kishor http://punkish.eidesis.org/ Nelson Inst. for Env. Studies, UW-Madison http://www.nelson.wisc.edu/ Open Source Geospatial Foundation http://www.osgeo.org/education/ - collaborate, communicate, compete = - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] Obtaining randomness on win32
Marco Bambini <[EMAIL PROTECTED]> wrote: > I really think that this article > http://eternallyconfuzzled.com/arts/jsw_art_rand.aspx > worths a read. > > It talks about the general rand function and the problem of > distribution... SQLite has always used an RC4-based PRNG, not rand(), for exactly the reasons cited in the article referenced above. Thanks for the link though. -- D. Richard Hipp <[EMAIL PROTECTED]> - To unsubscribe, send email to [EMAIL PROTECTED] -
AW: [sqlite] Obtaining randomness on win32
> randomness as you need. But I do not know how to do this on > win32 and wince. The current implementation seeds the random As Michael already suggested, you should use the CryptoAPI (CryptAquireContext, CryptGenRandom). This API is supported by all 32 bit desktop versions and by Windows CE starting with version 2.10. Christian - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] Obtaining randomness on win32
John Stanton <[EMAIL PROTECTED]> wrote: > Have you considered an option where the user can supply the seed so that > an application can implement a complete sequence from the pseudo random > number generator? > When testing (-DSQLITE_TEST=1) the seed is always 256 bytes of 0x00. That way the same random sequence is generated on multiple runs of the same test. If users need to set their own seeds in a standard build, they can overload the sqlite3OsRandomSeed() interface using the redefinable I/O mechanism. Let's avoid adding yet another API where it is not absolutely necessary. -- D. Richard Hipp <[EMAIL PROTECTED]> - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] Obtaining randomness on win32
On 1/29/07, Michael Ruck <[EMAIL PROTECTED]> wrote: On Windows itself you could use the CryptAcquireContext, CryptGenRandom and CryptReleaseContext. I think that doesn't work on WinCE though. It will work on Windows CE since version 2.10, as long as the OS was built with support for it (for those not aware, last Windows CE version is 6.0). A link to MSDN is: http://msdn2.microsoft.com/en-us/library/ms884454.aspx As the link says, if that function is not available, CeGenRandom() can be used instead, but it's only available since Windows CE 4.1. If you intend to use /dev/urandom instead of /dev/random, then I would think CeGenRandom may be enough for the Windows CE implementation (the current sqlite port only compiles out of the box for WinCE 4.x+, anyway). Regards, ~Nuno Lucas - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] Obtaining randomness on win32
I really think that this article http://eternallyconfuzzled.com/arts/jsw_art_rand.aspx worths a read. It talks about the general rand function and the problem of distribution... --- Marco Bambini http://www.sqlabs.net http://www.sqlabs.net/blog/ http://www.sqlabs.net/realsqlserver/ On Jan 29, 2007, at 5:14 PM, [EMAIL PROTECTED] wrote: The pseudo-random number generator (PRNG) in SQLite is becoming more important so it seem good to make sure it is well seeded. On Unix this is easy - just open /dev/urandom and read out as much randomness as you need. But I do not know how to do this on win32 and wince. The current implementation seeds the random number generator on these platforms by grabbing a copy of the current system time. See the sqlite3WinRandomSeed() function in os_win.c for details. This is not a very good method for seeding a PRNG. Can someone with more knowledge of win32 and wince please suggest a better method for seeding the PRNG on those platforms? -- D. Richard Hipp <[EMAIL PROTECTED]> -- --- To unsubscribe, send email to [EMAIL PROTECTED] -- --- - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] Obtaining randomness on win32
Have you considered an option where the user can supply the seed so that an application can implement a complete sequence from the pseudo random number generator? This might help with Win32. http://msdn2.microsoft.com/en-us/library/aa387694.aspx [EMAIL PROTECTED] wrote: The pseudo-random number generator (PRNG) in SQLite is becoming more important so it seem good to make sure it is well seeded. On Unix this is easy - just open /dev/urandom and read out as much randomness as you need. But I do not know how to do this on win32 and wince. The current implementation seeds the random number generator on these platforms by grabbing a copy of the current system time. See the sqlite3WinRandomSeed() function in os_win.c for details. This is not a very good method for seeding a PRNG. Can someone with more knowledge of win32 and wince please suggest a better method for seeding the PRNG on those platforms? -- D. Richard Hipp <[EMAIL PROTECTED]> - To unsubscribe, send email to [EMAIL PROTECTED] - - To unsubscribe, send email to [EMAIL PROTECTED] -
AW: [sqlite] Obtaining randomness on win32
I'm not sure if this helps, but QueryPerformanceCounter could be a source of semirandom 64-bit integers. It returns the processors running time in nanoseconds. I'm not aware of anything, which returns really random values. On Windows itself you could use the CryptAcquireContext, CryptGenRandom and CryptReleaseContext. I think that doesn't work on WinCE though. Michael > -Ursprüngliche Nachricht- > Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Gesendet: Montag, 29. Januar 2007 17:15 > An: sqlite-users@sqlite.org > Betreff: [sqlite] Obtaining randomness on win32 > > The pseudo-random number generator (PRNG) in SQLite is > becoming more important so it seem good to make sure it is > well seeded. On Unix this is easy - just open /dev/urandom > and read out as much randomness as you need. But I do not > know how to do this on > win32 and wince. The current implementation seeds the random > number generator on these platforms by grabbing a copy of the > current system time. See the sqlite3WinRandomSeed() function > in os_win.c for details. This is not a very good method for > seeding a PRNG. > > Can someone with more knowledge of win32 and wince please > suggest a better method for seeding the PRNG on those platforms? > > -- > D. Richard Hipp <[EMAIL PROTECTED]> > > > -- > --- > To unsubscribe, send email to [EMAIL PROTECTED] > -- > --- > > - To unsubscribe, send email to [EMAIL PROTECTED] -
[sqlite] Obtaining randomness on win32
The pseudo-random number generator (PRNG) in SQLite is becoming more important so it seem good to make sure it is well seeded. On Unix this is easy - just open /dev/urandom and read out as much randomness as you need. But I do not know how to do this on win32 and wince. The current implementation seeds the random number generator on these platforms by grabbing a copy of the current system time. See the sqlite3WinRandomSeed() function in os_win.c for details. This is not a very good method for seeding a PRNG. Can someone with more knowledge of win32 and wince please suggest a better method for seeding the PRNG on those platforms? -- D. Richard Hipp <[EMAIL PROTECTED]> - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] enforcing Foreign Keys
To unsubscribe, send email to [EMAIL PROTECTED] - Original Message From: Mag Gam <[EMAIL PROTECTED]> To: sqlite-users@sqlite.org Sent: Saturday, January 27, 2007 9:13:11 AM Subject: Re: [sqlite] enforcing Foreign Keys So...anyone? On 1/25/07, Martin Jenkins <[EMAIL PROTECTED]> wrote: > > Dan McDaniel wrote: > > Can someone tell me how to unsubscribe. I have sent > > two messages to the link and have had no luck thank > > you. > > --- Mag Gam <[EMAIL PROTECTED]> wrote: > > > Send a mail to [EMAIL PROTECTED] - it has directions on how > to unsubscribe if the standard method fails. I just tried it and > (assuming all the timestamps are correct) got a response back in a > fraction over a minute. > > Martin > > > - > To unsubscribe, send email to [EMAIL PROTECTED] > > - > > - To unsubscribe, send email to [EMAIL PROTECTED] -
