qlite-users-boun...@sqlite.org] on
behalf of Jim Wilcoxson [pri...@gmail.com]
Sent: Saturday, February 12, 2011 10:11 AM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] UPDATE/INSERTing 1-2k rows slower than expected
On Sat, Feb 12, 2011 at 9:10 AM, Black, Michael (IS) wrote:
&
9:10 AM, Black, Michael (IS)
> > D:\SQLite>batch 5000 1
>> 360766.6 inserts per sec
>>
>
> Unless I'm missing something, SQLite has to update the first page of the
> database on every commit, to update the change counter. Assuming you are
> using rotating media,
OK...I added your trigger example as option 8. And I had pasted the wrong
version in my last email. My timings were correct. Your example also did
sql_exec instead of using prepare so it will run slower.
I also made this compilable on Unix too.
On Unix my timing matches the run time and there
SOLVED!!
Marcus Grimm and I went back forth a number of times trying to figure out why
my benchmarks were so much faster than his.
Found it...
My SATA RAID setup had "Enable Advanced Performance" on by default (I had never
turned it on).
My secondary tests on an IDE drive showed similar perfor
Also...here's another part of the benchmark which shows triggers aren't as evil
as I thought. Trigger for this example was 2X the manual update.
F:\>d:batch 50 1000 12
using wal mode
using update trigger
Sqlite Version: 3.7.5
Inserting 50 rows using a bulk of 1000
commits per second: 714
And you think Jim's timings are wrong because..
I've already shown you can get speed just like he's showing.
That's what you get on a good write-cache-enabled drive.
And if you want to talk about data reliability...BACK UP YOUR DATA.
The likely failure points I can think of are:
#1 Power
PM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] UPDATE/INSERTing 1-2k rows slower than expected
On Mon, Feb 14, 2011 at 11:50 PM, Black, Michael (IS) <
michael.bla...@ngc.com> wrote:
> And if you want to talk about data reliability...BACK UP YOUR DATA.
> The likely fai
v...@bigfraud.org]
Sent: Monday, February 14, 2011 5:04 PM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] UPDATE/INSERTing 1-2k rows slower than expected
On 14 Feb 2011, at 8:50pm, Black, Michael (IS) wrote:
> And if you want to talk about data reliability...BACK UP YOUR DATA.
Try this benchmark program and see what numbers you get. You need to compare
to other machines with the same benchmark to see if it's the machine or your
programming/architecture.
The MC55 is a 520Mhz PXA270 so I would expect to see more than a 6X difference
from my 3Ghz box (memory speed is no
I'm of the opinion that all such warnings should be permanently fixed. Such
warnings do point to potential problems.
And not by disabling the warning but by fixing the code (explicit casts for
example).
How many people try this and get worried about possible problems? If you
simply fix the co
, February 18, 2011 7:53 AM
To: General Discussion of SQLite Database
Cc: Black, Michael (IS)
Subject: EXT :Re: [sqlite] Compiler warnings in R-Tree code under Visual
StudioExpress
On Fri, Feb 18, 2011 at 8:12 AM, Black, Michael (IS)
mailto:michael.bla...@ngc.com>> wrote:
I'm of the
users-boun...@sqlite.org] on
behalf of Roger Binns [rog...@rogerbinns.com]
Sent: Friday, February 18, 2011 7:45 PM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] EXT :Re: Compiler warnings in R-Tree code under Visual
StudioExpress
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On
I think I already know the answer to this...but is it possible to append text
to an FTS row without doing some sort of subselect?
Even with the subselect what;s the best way to do this? I seem unable to find
a single-liner that works.
sqlite> create virtual table data using fts4(content te
I don't know if it works for your data...but you don't need to do all 5.4M in
one batch.
You should test doing it in different batch sizes -- like 1000 at a time (and
let other processes do their thing potentially). That way you won't lock them
out. But I think your other selects need to use t
m: sqlite-users-boun...@sqlite.org [sqlite-users-boun...@sqlite.org] on
behalf of Puneet Kishor [punk.k...@gmail.com]
Sent: Saturday, February 19, 2011 10:21 AM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] FTS Append?
On Saturday, February 19, 2011 at 10:17 AM, Black, Michael
If I'm not mistaken only WAL mode supports simulaneous read/write.
For any other mode any write function will lock the database.
So...selects may run into a need to wait until a write finishes.
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
I dont' know the details of the busy handler. Not clear to me that it should
sequentialize the requests.
Perhaps you're better off just using a flag that you could check between your
commit;begin so that if there's a request in the queue you go process it before
continuing.
commit;
if item_in
You don't say how many cores you have but I assume more than 4. If you're just
single or dual-core I'd say this isn't too surprising.
It's pretty rare that multi-threading gives an N*X performance boost --
especially for CPU or disk bound processes. Simon said most of the reasons but
also for
My first (and only) reaction is "bug in your code" overrunning a char buffer.
If you could show where you do this maybe we can help. Problem is that it
could be another statement doing the overrun too so as much code as you could
share would help.
Michael D. Black
Senior Scientist
NG Informati
eptual/Multithreading/CreatingThreads/CreatingThreads.html
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@sqlite.org [sqlite-users-boun...@sqlite.org] on
behalf of Black, Michael (IS) [micha
Did you increase the main thread size too?
I would bump them both up by a LOT. A 2X change might not be enough. The
simulator might grow the stack in a different direction so it's just not
visible.
Can you turn on stack checking in the compiler? Or stack-usage?
If it's not the stack the
Those numbers make sense to me.
Since count is doing a linear walk throughcorrect?
#1 SSDs more than likely don't do "read ahead" like a disk drive. So what
you're seeing is what read-ahead does for you.
#2 Count is doing a linear scan of the table...Probability of 2K containing the
next p
I think your problem may be that fun() in your eval is being called both from
tcl and from sqlite.
Name your proc fun2 and the problem will probably go away.
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From:
w 1024), as you see the difference is
only x2. I have only one explanation looking at the numbers. Although it's
well-known that sqlite reads only full pages, if it sometimes does partial
reading, this 5MB/Sec drop for <256 reading can affect linear speed of 25
MB/Sec to end up as 12MB/Sec. Bu
Well that's one you never mentioned...it works on the version with the SDK?
What version of sqlite comes with that? And why are you upgrading sqlite?
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-u
My experience says the problem/solution is probably simple...FINDING it is the
hard part.
You'll likely change one or two lines of code unless it's a problem with stack
usage on SQlite that has changed.
Anybody done any measurement on SQLite stack usage?
Michael D. Black
Senior Scientist
NG Inf
No such thing as "close enough" when it comes to different versions.
Can somebody find the 3.6.23.2 amalgamation for this guy?
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@sqlite.org
Have you run your test with and without crypto? If Apple can compile 3.6.23.2
to work you should be able to also (might be overly optimistic here but
compilers are 100% deterministic, although not necessartiliy 100% binary match).
Michael D. Black
Senior Scientist
NG Information Systems
Advance
Try using SQLITE_TRANSIENT instead of STATIC.
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@sqlite.org [sqlite-users-boun...@sqlite.org] on
behalf of pcun...@fsmail.net [pcun...@fsma
SQlite's random() is a pseudo-random (as are most all) so there is no collision
until you get the same value back at which point it just repeats the whole
sequence again.
So the following example should work fine for him. When it collides you've
cycled through the complete range of SQlite's ra
I wasn't aware SQLite's PRNG was not like most others. Good to know.
I guess one could insert their own random() function if you need repeatability
(which is actually a major point of most random number generators). I don't
see the seeding exposed in SQLite so you can restart from a given point
I was trying to follow the documentation on FTS4 and found what I guess is a
typo.
In several places there is a reference to "document" where I believe it should
be "documents" as the first term doesn't exist in any create statement.
There are several of these in Appendix A
http://www.sqlite.or
You should learn how to use "explain query plan".
Indexes are a trade-off between insert speed (slow) and select speed (fast).
If you have a static database there is no such thing as too many indexes as
they never would get changed. Most of us live in the world between.
Generally, don't worry
You go from 2 minutes to 30 minutes just based on clock speed.
I would imagine you don't have much disk cache on the ARM device, so every time
you read the database it has to hit the file systemouch
Did you benchmark your PC system without using a cached database? Just edit
the database
You don't say how big your database is.
My guess is when you see the server using a lot of RAM (and exactly how are you
measuring this?) that it's flushing its disk cache. If you're on Unix use
vmstat to see what your OS cache is doing.
So...perhaps if you increase SQLite's internal cache it
mroth.com]
Sent: Sunday, March 13, 2011 8:40 AM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] Optimising a query with several criteria
Hi Michael, thanks for this. My database is 40 megabytes (and growing
slowly) - is that a reasonable cachesize?
On 13/03/2011 13:07, Bla
Try CodeBlocks
Cross-platform and works with gcc or MSVC or pretty much whatever.
I put in gcc 64-bit for it.
http://www.codeblocks.org/
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@
Try this.
BEGIN TRANSACTION;
CREATE TABLE sales(SaleDate date,SaleVolume int);
INSERT INTO "sales" VALUES('2010-01-01', 10);
INSERT INTO "sales" VALUES('2010-01-02', 20);
INSERT INTO "sales" VALUES('2011-01-01', 15);
INSERT INTO "sales" VALUES('2011-01-02', 30);
INSERT INTO "sales" VALUES('2009-01
But I thought he said he dropped the indexes (meaning they aren't there during
inserts).
That should make sorting irrelevant.
3 Things.
#1 Test with :memory: database and see what the speed is. That tells you if
it's SQLite or disk I/O as the bottleneck.
#2 Try WAL mode "pragma journal_mode=WA
I hope you know what you're doing with trying to preserve that much
significance. Ths first time you stick it in a double or long double variable
you'll lose it. You can use the HPAlib to get 32 digits
http://www.nongnu.org/hpalib/
// Example showing digit loss -- doesn't matter double or lo
Hmmm...the docs do say that...but how do you get that value back out?
Retreiving it as text doesn't work.
You still don't say what you're planning on doing with these number...just
displaying them?
I think the docs may be misleading...here is the comment in sqlite3.c
/*
** Try to convert a valu
Blob may be better if you need speed -- then no conversion is necessary inside
your Pascal code to/from a string.
But if you want to be able to see and understand your database text is better
(or you have to write a special Pascal program to decode your database to look
at any problems).
And...
Unless you're running multiple SQLite apps you don't gain anything by using a
DLL. Plus, is your Pocket PC a i386 CPU?
So try downloading the amalgamation and include sqlite3.c and sqlite3.h in your
project.
http://www.sqlite.org/sqlite-amalgamation-3070500.zip
You'll also find the code will be
Hmmm...according to my math...
Max 64-bit unsigned integer is
18446744073709551615
Drop the last digit as it can't hold 0-9
1844674407370955161
Make two decimal positions
18446744073709551.61
Now some commas so we can see better
18,446,744,073,709,551.61
That' $18 quadrillion dollars by my math.
When you say "All an index does" don't forget that an index is also usually
smaller than the data, thereby increase cache performance and reducing disk
seeks.
For a good chunk of typical uses (large tables with simple lookups) an index is
notably faster.
I'll admit my use of sqtlite3 hasn't
Base 10 multiplication is needed. Although money is the main reason for doing
BCD due to cumulative errors it's not the only reason. So I'd recommend adding
decimal*decimal -> decimal just to be complete. It's easy enough to implement
using the + function so could just be noted as "slow".
Th
Wouldn't the addition of "Empty result sets will return SQLITE_DONE on the
first call to sqlite3_step." add some clarity?
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@sqlite.org [sqli
Just to help clarify (hopefully) the Unix/Windows "reserved filename".
CON: is similar to Unix's /dev/zero or /dev/null for example -- Files that
already exist and have OS meaning.
stdout is NOT a reserved filename...it's a predefined variable of FILE *. You
cannot say "cp file stdout" on Unix
I don't understand how your column C works...so I'll assume it's pre-known for
now. But here's how to get A/B to work.
drop table t if exists;
create table t(a int,b int,c int);
create trigger trig1 after insert on t
begin
update t set a=(select count(b) from t where b=new.b) where a=0;
end;
ins
Since it apperas you're running your commit in a separate thread and are
therefore muilti-threaded I do belive you need:
SQLITE3_THREADSAFE=2
>From http://www.sqlite.org/compile.html#threadsafe
To put it another way, SQLITE_THREADSAFE=1 sets the default threading mode to
Serialized. SQLITE_THREA
You apparently don't understand "strings" in C. Or are you actually reading in
binary data?
#1 Since you said "image" I assume you're reading binaary. So get rid of
buffer[fsize]=0. You don't null terminate binary data and that statement is
1-beyond the end of the array (which is from 0 to fs
How are you trying to view the ouitput.result.txt (and I"ll note that it'sNOT a
text file...it's an image according to what you said.). What's the size of the
file.
And you should be able to post a COMPLETE example to show your testing. What
you say you want to do has been done by many before
I ran your code with my test file and I get this...which is perfectly correct.
Do you get something different? What makes you think the stream is truncated
in the database?
Also...change SQLITE_STATIC to SQLITE_TRANSIENT...that could be your culprit if
you are still seeing truncation.
Plus "
A B nl
003
I must be doing something fundamentally wrong.;-(
Thanks for the help so far, I really appreciate it.
Lynton
On 03/04/2011 13:44, Black, Michael (IS) wrote:
> How are you trying to view the ouitput.result.txt (and I"ll note that it'sNOT
> a text file..
Care to show us your SPL_mallocstr() function?
Sounds like you've corrupted data if that line dies. All it's doing is
checking an array value which is used all over the place in sqlite3.c
If you put a break point there and on the first time it's hit put a watch on
the address for u.ao.nByte>db
Seems to behave OK for me on 3.7.5 on Windows. What version are you using on
what OS with what compile flags?
You also "said" it didn't work but you didnt' actually what what you did.
Like this...
SQLite version 3.7.5
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
That's the nice thing about standards...there's so many to choose from :-)
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@sqlite.org [sqlite-users-boun...@sqlite.org] on
behalf of Simon Sl
Ummm...are we forgetting about swap space?
If you exceed RAM you hit swap. If you exceed RAM+SWAP you start failing.
Or does sqlite monitor physical memory usage?
So if you exceed RAM you just start slowing down towards a disk-based equialent
database.
Michael D. Black
Senior Scienti
Assuming your database ONLY contains the log entries this should workand be
pretty fast too since rowid is already indexed and there areYou no other
lookups.
You can add your own rowid to make this work otherwise. Just do a
max(myrowid)+1 on your insert.
PRAGMA foreign_keys=OFF;
BEGIN
create table t (d default CURRENT_DATE,i number);
insert into t (i) values(1);
select * from t;
2011-04-21|1
Use CURRENT_TIME if you want hours/minutes too.
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sql
A slight mod on my solution makes it work for DST changes too. Again...rowid
must be maintained.
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE log(d date);
INSERT INTO "log" VALUES('2011-03-13 01:55');
INSERT INTO "log" VALUES('2011-03-13 01:56');
INSERT INTO "log" VALUES('2011-03-1
3.75 on Redhat 5.6 does not have a problem.
I get
8.88
16.88
32.88
64.88
Fixed in 3.7.5 maybe?
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@sqlite.org [sqlite-users-boun...@sq
Sounds like soundex might work for you. Not sure how it handles diacritics
though.
http://www.mail-archive.com/sqlite-users@sqlite.org/msg35316.html
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-us
Michael D. Black
Senior Scientist
NG Information Systems
Advanced Analytics Directorate
From: sqlite-users-boun...@sqlite.org [sqlite-users-boun...@sqlite.org] on
behalf of Nick [maill...@css-uk.net]
Sent: Sunday, May 08, 2011 3:52 PM
To: sqlite-users@sql
You do realize the number they quote is a MAXnot necessarily what you'll
get.
With 16 transactions per second you're writing on transaction every 63ms. My
understanding is that the hard drive in the netbook is 15ms access time so
you're seeing 4 accesses per transaction with the way you'
#1 I don't see where you're freeing m_szErrorString (not real sure if it gets
malloc'd on success) -- but you do need to free it on errors for sure.
And where's your Callback function? Why are you calling SaveResultSet (which
you also don't show)? That should probably be done inside the Call
Do I understand you're still seeing a segfault? I assume you're not seeing
your "Year retrieved..." statement?
You haven't showed us your table definition.
Change your strcmp to strcasecmp and see if that fixes it for you.
Michael D. Black
Senior Scientist
NG Information Systems
Adv
Can you try doing table copies using select with offset and limit?
See where limit crashes the system and then offset past it perhaps?
Just a guess on my part as one possibility.
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Gr
http://www.sqlmaestro.com
May do what you want...
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
From: sqlite-users-boun...@sqlite.org [sqlite-users-boun...@sql
type dbscript.sql | sqlite3 test.db3 > dbscript.log 2>&1
And order is importantyou need to redirect to file first and then redirect
stderr to stdout as above.
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman
I subtract 12 hours...so any time from 24:00:00 to 12:00:00 will work.
Time from noon to noon becomes midnight to midnight. Then you just add the 12
hours back in.
CREATE TABLE tijd(t int(11));
INSERT INTO "tijd" VALUES('2012-02-25 22:00:00');
INSERT INTO "tijd" VALUES('2012-02-27 01:00:00')
Hmmm...works for me...
On Windows:
SQLite version 3.7.9 2011-11-01 00:52:41
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> create table test(a text primary key);
sqlite> insert into test values('1');
sqlite> insert into test values('1');
Error: column a is not
You don't say what language you are working in. IN C++ I would just declare a
"set" and put random row numbers in it until I had enough. Then use that set
to build the SQL.
SQLite's random() doesn't have a seed function so you don't really get very
random numbers from run-to-run and have no
] Efficient random sampling in a large table using
builtin functions.
On 8 March 2012 14:20, Black, Michael (IS) wrote:
> You don't say what language you are working in. IN C++ I would just declare
> a "set" and put random row numbers in it until I had enough. Then use that
&
avies [simon.james.dav...@gmail.com]
Sent: Thursday, March 08, 2012 8:47 AM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] Efficient random sampling in a large table using
builtin functions.
On 8 March 2012 14:37, Black, Michael (IS) wrote:
> Glad to know thatcould that pos
Looks like this should work...
>From http://www.cs.cf.ac.uk/Dave/C/node27.html
The following code fragment demonstrates a use of this to create a block of
scratch storage in a program, at an address that the system chooses.:
int fd;
caddr_t result;
if ((fd = open("/dev/zero", O_RDWR)) == -1
at 11:45 AM, Black, Michael (IS) wrote:
> Looks like this should work...
>
No, it won't work. The memory has to be shared in common among all
connections to a particular database. If two separate processes connection
to the same database, they must get the same block of shared memory.
Put an absolute path name for your filename.
You're probably opening up the database in the wrong directory, creating an
empty DB, and thus "no such table".
In particular this happens when running from the IDE or via an Icon where the
working directory is not set.
Michael D. Black
Senior
Try creating 2 tables, one for topics, one for definitions.
Then insert all the topics at once followed by all the definitions.
That should give you the same disk layout as two databases.
And you don't say what "lengthy" means.
Michael D. Black
Senior Scientist
Advanced Analytics Direct
sh start.
Tim
On 3/20/2012 10:26 AM, Black, Michael (IS) wrote:
> Try creating 2 tables, one for topics, one for definitions.
>
>
>
> Then insert all the topics at once followed by all the definitions.
>
> That should give you the same disk layout as two databa
Cache is the primary (and obvious) thing I can think of.
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
From: sqlite-users-boun...@sqlite.org [sqlite-users-boun..
n pretty much expect. Would getting a server with 4 CPUs and 16GB (a
> > high-end home-version PC) - reasonably enable me to run 3-4 SQLite jobs
> > concurrently? In other words - no great speed improvement per job - but
> in
> > aggregate more work could get done?
> >
>
Don't see any problems here with valgrind.
Red Hat Enterprise Linux Server release 5.7 (Tikanga)
[sqlite-amalgamation-3071100]$ gcc -g -o shell shell.c sqlite3.c -ldl -lpthread
[sqlite-amalgamation-3071100]$ ./shell
SQLite version 3.7.11 2012-03-20 11:35:50
Enter ".help" for instructions
Ente
You'll need to export the table and data. Change the SQL to what you want.
Then import again.
Does the shell have ability to name the columns on the insert statements from
the .dump to make this easier? I don' t see anythinig offhand that seems to do
that.
Michael D. Black
Senior Sci
What you want is the system() function which will execute a shell command.
But you still need to add your own HTML around it to be displayed by a browser
as it's missing the "rest of the story".
system("echo >mm.html"); // first one creates mm.html
system("echo >>mm.html"); // 2nd and su
ite.org] on
behalf of Simon Slavin [slav...@bigfraud.org]
Sent: Saturday, March 31, 2012 7:50 AM
To: General Discussion of SQLite Database
Subject: EXT :Re: [sqlite] about sqlite3_exec function
On 31 Mar 2012, at 12:48pm, "Black, Michael (IS)"
wrote:
> What you want is the system() functi
Database files are purportedly platform independent. So why don't you
distribute the database file instead of building it?
Then your checksum would be fine.
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Informati
Howeverthe DB file is portable across big/little endian and 32/64 bit.
So do your hash on the DB file and distribute that. Any reason you can't do
that?
http://www.sqlite.org/onefile.html
I guess SQLite uses the endianess of the database file over the architecture?
Michael D. Blac
You need 2 inserts to do what you want. Hopefully the order in the table
doesn't matter to you.
sqlite> CREATE TABLE t2 (Col1 text,Col2 text);
sqlite> insert into t2 (Col1) values('xxx');
sqlite> insert into t2 values('yyy','def');
sqlite> select * from t2;
xxx|
yyy|def
sqlite>
sqlite>
sqlite>
Don't you need to load the sqlite3 library first for tclsh?
load ./libtclsqlite3.so Sqlite3
Or something like that?
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
__
You want your assert to be this:
assert(stmt != NULL);
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
From: sqlite-users-boun...@sqlite.org [sqlite-users-bou
You don't show how you're compiling...but this is what you need to do.
gcc -o myprog myprog.c sqlite3.c -lthread -ldl
Your undefined reference are to the two libraries you need to link in to
resolve them.
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOIN
'origine-
De : sqlite-users-boun...@sqlite.org [mailto:sqlite-users-boun...@sqlite.org]
De la part de Black, Michael (IS)
Envoyé : mercredi 11 avril 2012 14:01
À : General Discussion of SQLite Database
Objet : Re: [sqlite] error compilation with sqlite amalgamation
You don't show how y
I assume you are batching your inserts?
How many inserts/sec do you need to do to keep up?
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
From: sqlite-users-boun
You're missing a step in your library build.
ranlib libsqlite.a
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
From: sqlite-users-boun...@sqlite.org [sqlite-
rs-boun...@sqlite.org [mailto:sqlite-users-boun...@sqlite.org]
De la part de Black, Michael (IS)
Envoyé : jeudi 12 avril 2012 17:17
À : General Discussion of SQLite Database
Objet : Re: [sqlite] error compilation with Sqlite in C program
You're missing a step in your library build.
Store them as float or do integer and multiple by a power of 10 to get as many
digits as you want.
So 1.234 seconds *10^3 can be 1234 integer
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Advanced GEOINT Solutions Operating Unit
Northrop Grumman Information Systems
You're talking PHP...not SQLite.
SQLite doesn't know about timezones other than "local" and "utc".
So your timezones will depend on your OS.
On RedHat it's in /usr/share/zoneinfo and there's tons of them. I've got 1,743
of them.
Michael D. Black
Senior Scientist
Advanced Analyti
Have you checked your table afterwords to ensure you don't have any nulls in
IsReplaced?
select count(IsReplaced) from mytable where IsReplaced is null;
I tested and the alter table does fill with default values for me. At least
from the sqlite shell.
Does this work for you? Are you doin
default values are during INSERT...not SELECT.
I suppose it's possible Maestro is messing it up.
You just need to do an "update mytable set IsReplaced=0 where IsReplaced is
null;"
You can do that from the shell.
Hopefully that makes your ADO happy.
If you want to test the shell then d
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