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>
You need to use CURRENT_TIMESTAMP as shown at
http://www.sqlite.org/lang_createtable.html
HTH
Dennis Cote
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ct unless the lastrowid
and nchanges values are saved and restored around the xCommit calls that
happen when the active transaction ends. Would that be a possible solution?
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have lots of fields that you want to do this with the required
number of combinations can get large very quickly, so you may be better
off building the statements on the fly.
HTH
Dennis Cote
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Richard and Scott may have misread this one a little bit.
It seems to me that all the operations Bram has done are using the
normal (i.e. non-virtual table) table, one. All the accesses of the
virtual table search are done inside the trigger routines. SQLite is
supposed to be sa
rivers at
http://www.sqlite.org/cvstrac/wiki?p=SqliteOdbc which may work for you
as well.
HTH
Dennis Cote
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this and subsequently slows down to the
real speed of remote file access.
See http://en.wikipedia.org/wiki/Opportunistic_Locking for additional info.
HTH
Dennis Cote
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compiler command line by adding
this option to the command
-DSQLITE_ENABLE_FTS3
Or you can add the definition to your IDE's project options file. I'm
not sure how to do this with VS 2005, but you can probably find it in
the help for additional compiler definitions.
HTH
Dennis Cote
better
approach, there is a partial answer to your question.
SQLite provides the sqlite3_mprintf() function and it's associated %q
and %Q format specifiers for quoting SQL strings. See
http://www.sqlite.org/c3ref/mprintf.html for details.
I'm not sure if this functionality is ex
lready exists, and is included in SQLite. It is called
group_concat(). See http://www.sqlite.org/lang_aggfunc.html for details.
SELECT guid
FROM data
WHERE text MATCH
(SELECT group_concat(query, ' OR ') FROM category);
HTH
Dennis Cote
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lue with no mutual exclusion provided by SQLite.
You can of course use your own mutex to control access to this variable
(through the API function), to allow your threads to read the value
reliably after an insert. Or you could simply have each thread use a
separate connection
ase do so if you have the time. If you locate a bug it will help
all users of SQLite.
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[EMAIL PROTECTED] wrote:
> The attachment size limitation of the bug report is 100k :(
I'm sorry about the late follow up, but I have been away for a while.
Can you contact me off list to see about transferring the compressed
database so I can use it to look into the problem?
Dennis C
You are correct, it should not crash. That's why it is important to get
a copy of the database that is causing the problem so that it can be
used to find the bug.
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ane Long null,
Primary Key (CarID)
);
SQLite does accept the table definition as you have it written without
any error messages, but it does not agree with the documentation. So
there is either an error in the documentation or in the parser. You ma
d try benchmark tests with page sizes of 8K and 32K
to see if there is a substantial difference.
HTH
Dennis Cote
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//en.wikipedia.org/wiki/Thread_hijacking
What is the schema of Carimages table? Can you provide a couple of
sample records instead of the entire database?
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f a table
then you may be able to use some of these ideas to speed things up.
HTH
Dennis Cote
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0 2 0 t 00
29Goto 0 3 000
sqlite>
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ment
(but it should not cause a problem either).
HTH
Dennis Cote
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[EMAIL PROTECTED] wrote:
> Is there a way to configure SQLite using a property/config file?
> Is changing the source code the only way to affect how it behaves?
>
It would probably be better if you were a little more specific. What
part of its behavior do you want to change?
De
y existing records in t_real you could
use an insert or replace instead.
insert or replace into t_real select * from t_temp;
HTH
Dennis Cote
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. Is that correct? If so, what options are
defined when it is being built? If not, how is it built?
TIA
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nager add-on for Firefox at
https://addons.mozilla.org/en-US/firefox/addon/5817. It seems to work
quite well in my testing. Its nice to have the same interface on
multiple platforms if you switch back and forth often.
HTH
Dennis Cote
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Joanne Pham wrote:
> So one connection is used by two multiple statements concurrently one for
> insertion and one for selection. Is that ok.
>
Yes, that's fine.
HTH
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lect like this
select ?1, ?2, ?3
and then transfer the bindings from the first select to the second. When
you run the second query it will return the values you bound to the
first query before calling sqlite3_transfer_bindings().
HTH
Dennis Cote
_
ex) measures
the execution time of each SQL statement to help you optimize your SQL.
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y, so they cannot be used by your application.
If you are using the sqlite3 shell, you can use the .read command to
execute all the commands in a file.
sqlite>.read getData.sql
HTH
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ange the
size by replacing one blob with another one of a different size.
> Is it possible to store the file in a bigger
> blob and then replace the blob with smaller one without to copy the raw blob
> data?
>
No, when you replace a blob you will need to copy the data into th
then set the size
of the blob correctly before you start writing to it.
HTH
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t that doesn't seem to
> work either.
>
If you post the code you are using to read and write the database
someone will be able to help you straighten this out.
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MIT_yyy ...
>
> Is this correct?
>
I believe so, but I haven't ever used the OMIT options when building SQLite.
Are you having a problem when you do this?
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James Gregurich wrote:
> I think I will go with CoreData on MacOSX and figure out something
> else to do on Windows later.
>
>
>
You do know that CoreData uses SQLite for its persistant storage.
Dennis Cote
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turn the host address within the network
which can't be used to test if the original IP address is within a
particular network.
> Again, that only works for v4.
>
It was only intended to work for IPv4 as shown in the OP.
Dennis Cote
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in other languages.
This was intended to work for IPv4 addresses only as shown in the OP
example. For these addresses the practical range of network width is
from 2, not really very practical, but a legal minimum subnet width, to
25, the entire range of a class A network.
De
he application if it write back to
the table.
> I believe a while back, IIRC, someone (perhaps Richard himself) had
> posted a way to log every action on a db in a table for posterity. I
> can't find that right now, but that could work for me.
>
The undo/redo code at http://www.sqlite.org/
ecuted. Your callback can log this to a file.
See http://www.sqlite.org/c3ref/profile.html for more info.
One drawback of this technique is that you don't get to see the values
of any bound parameters.
HTH
Dennis Cote
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nd passes the results back to,
your other threads as John suggested. You will have to provide some form
of resource management for the shared resource, whether it is a shared
memory database, file, or something else.
HTH
Dennis Cote
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ile will be locked, so readers will have to wait.
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course, but it seems like a lot of work
for little return when there are other ways to do what you want.
HTH
Dennis Cote
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ection.
sqlite3_finalize() destroys a statement created by sqlite3_prepare().
You do not close these statements.
HTH
Dennis Cote
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manage the locking
for you.
HTH
Dennis Cote
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to?
I believe it is the same as a normal begin. Locking is deferred until it
is required to allow maximum read concurrency.
HTH
Dennis Cote
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t; from the UPDATE to get my count?
>
I don't know for sure, but I suspect it would be the same. It seems like
it should be simple enough to try it out both ways.
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change_log);
Dennis
sqlite> select * from t1;
Alex
Dennis
sqlite>
Try it before you decide it won't work.
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verview.html for some more info. There is a
slide show from a presentation that Richard gave which explains how
SQLite execute joins as nested for loops, but I can't find it now.
HTH
Dennis Cote
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begin;
insert into t1 values ('Dennis');
select * from t1 where rowid in (select id from change_log);
Now either commit or rollback to end your transaction.
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Alex Katebi wrote:
> But triggers don't trigger until commit.
>
That is not true.
Trigger code executes inline with the statement that caused the trigger
to fire.
Try a few triggers with the command line shell to convince yourself.
Denni
ds stored in the change_log table.
If you want to get fancier you can look at this page for more ideas
http://www.sqlite.org/cvstrac/wiki?p=UndoRedo
HTH
Dennis Cote
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in condition.
In the OP's query SQLite is failing to use an index on the right table
when it should.
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Eric Minbiole wrote:
>
> However, I wanted to let others take a look, to see if the
> issue was with my query (quite possible), or with the new version.
>
This is definitely an issue with the new version. It is doing a nested
table scan instead of using the index for the left j
SQLite 3.5.8 module(s) there, then edit
> my path variable to point to it?
>
I put both files in my C:\Windows\System32 directory. It is already on
the path so you can run sqlite3.exe, and sqlite3.dll will be available
to any program that links to the dll but doesn't supply a local copy
Petite Abeille wrote:
>
> Would adding an unique index on an integer primary key be of any
> benefit? Or is it redundant?
>
It would not help, and would in fact slow down all inserts, deletes, and
updates for no benefit. It is redundant.
HTH
hat works on Mac OS
as well.
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ow large is a zipped (or better yet a 7z compressed) copy of the
problematic database file?
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lows it to use the columns
stored in the index to supply the results of a query without looking at
the main table. In effect this index becomes your main table because it
stores all the data.
HTH
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, but I agree with
this suggestion.
Two hands working can do more than a thousand clasped in prayer
This is one of the best things I have read in a long time.
Dennis Cote
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Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam
info(table-name) at
http://www.sqlite.org/pragma.html#schema
HTH
Dennis Cote
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3_api_rountines
^
Note the extra character! Guess which one you were using.
I looked at this for way too long, even after Dan had pointed it out.
HTH
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rieve the secondary fields using
the id obtained from the primary field.
select * from primary;
if (has_secondary())
select * from secondary where id = primary.id;
This does not waste any space storing unnecessary null fields. You
should only resort the more complex foreign keys whe
SQLite.
HTH
Dennis Cote
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owid))
...
where rowid in (select row1 from matches);
drop table matches;
HTH
Dennis Cote
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ntation at http://www.sqlite.org/opcode.html we have:
The virtual machine contains an arbitrary number of registers locations
with addresses beginning at one and growing upward. Each memory location
can hold an arbitrary string. The registers hold all intermediate
results of a calculation.
query
select remoteId, bytesIn
from compressTable
where remoteId in
(select remoteId from CDB.remoteWXTable where remoteType=1)
*/
sqlite3_exec(db, "detach database CDB");
HTH
Dennis Cote
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008-04-23
2008-04-24
2008-04-25 test 6
2008-04-26 test 6
2008-04-27 test 6
2008-04-28 test 6
2008-04-29 test 6
2008-04-30 test 6
2008-05-01
2008-05-02
2008-05-03
2008-05-04
2008-05-05
2008-05-06
2008-05-07
2008-05-08
HTH
Dennis Cote
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scape character as it does in C and mySQL
(I believe). In standard SQL you have to explicitly say which
character you want to use as an escape character using the escape
clause. Any character will work.
HTH
Dennis Cote
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nstead of using the title index for the ordering, but there will
hopefully be few records to sort, so it should be fast. How many records
does this query return?
HTH
Dennis Cote
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arting a new thread with each question). Having all the
messages on a topic in a single thread makes it far easier for others to
read and respond.
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then join the records with the same
containerID using that index with another check for the required type.
Finally it will select the indicated records from the container table
based on the rows selected.
HTH
Dennis Cote
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odule and load that into the
shell for the function to be available in the shell. See
http://www.sqlite.org/cvstrac/wiki?p=LoadableExtensions and the shell's
.load commnad for additional info.
HTH
Dennis Cote
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uses the other
index to find the matching records and checks that their type=1. These
records should lead directly to the required container records using the
primary key on that table. I would suspect this is reasonably fast. Let
me know if it helps.
HTH
Dennis Cote
SQLite version 3.5
first to see if it exists and if not then do the insert
> (assuming all within a single transaction to avoid a race if another
> thread is also inserting)? This feels like the wrong way to do it.
>
No, that is exactly the right way to do it.
Dennis Cote
__
that album so that it does refer to
the retained record. The update trigger will decrement the count of the
album records and remove them when they are no longer referenced by the
music table.
update ALBUM set AlbumName = 'xxx' where AlbumId = 1;
update MUSIC set Album_Id = 1 where Album_id
icitly cast away
the unsigned qualifier.
const char *str;
str = (const char*)sqlite3_value_text(...);
HTH
Dennis Cote
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as best I can
tell from the quoted Latin and its translation). As always you have to
take everything on wikipedia with a grain of salt, but this looks
authoritative.
Dennis Cote
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sword protected. Is it possible, and I just
> missed it? And/or do you have another suggestion.
>
Not for the standard distribution, but if you check out
http://www.hwaci.com/sw/sqlite/prosupport.html you will see that the
author offers an encrypted database option for a
g booking that conflicts with a proposed new
booking.
The last query shows how to find all the bookings at a given time.
HTH
Dennis Cote
-- resources that can be booked
create table resource (
resource_id integer primary key,
resource_name text unique
);
insert into resource
xt), ' ') from table
Then the columns can be truncated using the substr() function as you
suggest. The resulting strings should fit in your grid.
HTH
Dennis Cote
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entioned 'resolved' posts indicated mod_rewrite was an/the
> issue, so I tried enabling that in lighttpd.conf with no change in
> results.
This is just a guess since I don't use PHP, but is the function called
sqlite3_open in PHP the same as it is in the C library? Note the '3' in
the functio
dited version?
I suspect you may have a permission problem in the directory where you
are trying to create the database file. You must have write permission
in that directory.
Dennis Cote
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source and use that or try
linking to the sqlite3 library installed on your system (if there is
one). Try this:
gcc CreaDB.c -lsqlite3 -o CreaDB
HTH
Dennis Cote
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le to your compile command. If you have the
amalgamation source file you can do this.
gcc CreaDB.c sqlite3.c -o CreaDB
HTH
Dennis Cote
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ian day numbers.
HTH
Dennis Cote
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ll
display the path to the file it has open. Ensure this is the same file
you are opening in Air.
You can check the version of sqlite running in Air by executing the
following query:
select sqlite_version();
HTH
Dennis Cote
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open on a database at any time.
Locking is used to serialize transactions. Even with two connections,
you can't have two active transactions. The second will stall waiting
for the first to complete.
Dennis Cote
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ct some_value using music table)
where AlbumId in (select some records using the music table );
If this isn't what you are looking for, you will have to describe your
problem in more detail (i.e. what you are trying to do, an example of
before and after data, etc.) before anyone can provi
t
value (i.e. one row and one column) for use in a comparison, but there
is no restriction on what they can return.
HTH
Dennis Cote
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in advance,
>
No, you will be fine.
The last_insert_rowid is maintained on a per connection basis. Each
process has its own connection, and hence its own last_insert_rowid
value. The two processes use file locking to provide exclusion when they
are updating the database.
HTH
Dennis Cote
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write permission in the directory where where your sqlite3
program is? SQLite needs write permission to create the database file
and to open the journal file for any change to the database.
HTH
Dennis Cote
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r replace into t1(name) values('hello'); --works
HTH
Dennis Cote
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.sqlite.org/cvstrac/wiki has a few pages
that will help. http://www.sqlite.org/cvstrac/wiki?p=SqliteVfs is a
skeleton vfs file that you will need for a new vfs implementation.
HTH
Dennis Cote
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http:/
ownload page. For example the
preprocessed source for version 2.8.17 can be had by modifying the link
for the current version http://www.sqlite.org/sqlite-source-3_5_7.zip to
be http://www.sqlite.org/sqlite-source-2_8_17.zip. Enter that in your
browser and it will start the download.
HTH
y faster).
>
This is a bug and you should create a ticket at
http://www.sqlite.org/cvstrac/tktnew so that it gets addressed. Adding
an index should never change the result of a query.
As for a workaround; What about simply dropping the index? In other
words are you sure the correct version without the index is too slow?
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call. If you don't
need mutual exclusion (i.e. you are writing multithreaded code), then
you can define SQLITE_MUTEX_NOOP to included a set of macros that
effectively remove all mutex calls from SQLite.
HTH
Dennis Cote
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fer-Encoding: 7bit
Sender: [EMAIL PROTECTED]
Errors-To: [EMAIL PROTECTED]
As you can see the Replay-To header is set correctly.
HTH
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in case 1.
>
Why do you want to find the index of a Name?
Tables in SQL databases are not arrays. You don't use an index to
retrieve the data. Tables are more like unordered sets of data.
HTH
Dennis Cote
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builtin functions in the source as well. It
uses the same API's you will use.
HTH
Dennis Cote
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refore
portable to many other database systems, not just mySQL.
Dennis Cote
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formance regression in
SQLite 3.5.6. I think you should create a ticket so the developers can
look into it.
You have shown quite clearly that it is the update statement that is at
fault. I will take a look at the VDBE code generated by the update
statement to see if anything jumps out at me.
D
te> explain query plan select * from t2 order by a desc;
0|0|TABLE t2 WITH INDEX t2_a_dsc ORDER BY
If you post the actual SQL statements you use to create the table and
index, and the query you are using, someone will be able to figure out
why it isn't using the index.
HTH
Dennis Cote
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widths explicitly.
These commands determine how the shell displays the results of SQL queries.
The explain command also changes the output mode to a column mode with
headers and predetermined widths that are suitable for the output of
"explain statement" queries. It would
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