On 04/05/2011 04:49 PM, Filip Navara wrote:
> Hello,
>
> we are having problem with database that originated on computer of one
> of our customers.
>
> The database is used in WAL mode with auto_vacuum=1 and page_size=1024.
>
> When running the "pragma incremental_vacuum(1);" command the WAL file
>
On 4/5/2011 10:01 PM, Nikolaus Rath wrote:
> I'm experimenting with creation of a 156 MB database from scratch. I've
> set synchronous = NORMAL and locking_mode = exlusive.
>
> With journal_mode = off and without wrapping the INSERTs into a
> transaction, creating the db takes 54 seconds.
>
> With
Hello,
I'm experimenting with creation of a 156 MB database from scratch. I've
set synchronous = NORMAL and locking_mode = exlusive.
With journal_mode = off and without wrapping the INSERTs into a
transaction, creating the db takes 54 seconds.
With journal_mode = WAL (and still no transaction),
This won't be a trivial case to reproduce -- I need to create two tables,
with several rows, and my main db tool is broken right now. I did find a
workaround,
groveling over the results in Python.
If I bind the values to literals like so:
select "... str1" as p1_path and "... str2" as p2_path whe
On 4/5/2011 6:59 PM, Eric Promislow wrote:
> Notice the clause in the middle of the query:
>and (substr(p2.path, length(p1.path) + 1, 1) = "/"
> or substr(p2.path, length(p1.path) + 1, 1) != "/")
>
> If I comment out this full clause, the query returns the expected result
> set
On Tue, Apr 5, 2011 at 6:59 PM, Eric Promislow wrote:
> Notice the clause in the middle of the query:
> and (substr(p2.path, length(p1.path) + 1, 1) = "/"
>or substr(p2.path, length(p1.path) + 1, 1) != "/")
>
> If I comment out this full clause, the query returns the expected resu
On 5 Apr 2011, at 11:59pm, Eric Promislow wrote:
> Notice the clause in the middle of the query:
> and (substr(p2.path, length(p1.path) + 1, 1) = "/"
>or substr(p2.path, length(p1.path) + 1, 1) != "/")
>
> If I comment out this full clause, the query returns the expected result
I have full paths of a set of resources in a database, and am using
substrings to find arbitrary hierarchical resources. Worked fine on
Windows using Sqlite3 3.6.5, but on Linux with 3.5.9 the query fails.
The schema includes tables:
paths:(integer id, string path)
common_details:(integer path_id
On 5 Apr 2011, at 8:47pm, Guilherme Batista wrote:
> Yes it's true.
> But I'm not trying to improve the SQLite performance. I'm just studying the
> query optimization of databases in general, and a better way to optimize if
> the tables do not have indexes and if the query is complex and deals wi
Dear all,
what would be the best way to read a full txt file into one record?
Now, when I use
.import FILE TABLE
I have every line on a record.
I need all lines of one file on one record.
The next record I need to fill with all lines of another file.
thanks for your advise.
Gert
__
On 04/06/2011 01:39 AM, ChingChang Hsiao wrote:
> I believe it is a bug in 3.7.5. It didn't happen in 3.6.22. It causes core
> dump when using "BEGIN DEFERRED TRANSACTION" in one of our application to
> access DB periodically(every 1 second) . There are other applications access
> the same DB pe
On Tue, Apr 5, 2011 at 2:39 PM, ChingChang Hsiao <
chingchang.hs...@overturenetworks.com> wrote:
> I believe it is a bug in 3.7.5. It didn't happen in 3.6.22. It causes core
> dump when using "BEGIN DEFERRED TRANSACTION" in one of our application to
> access DB periodically(every 1 second) . There
I believe it is a bug in 3.7.5. It didn't happen in 3.6.22. It causes core dump
when using "BEGIN DEFERRED TRANSACTION" in one of our application to access DB
periodically(every 1 second) . There are other applications access the same DB
periodically but using "BEGIN EXCLUSIVE/IMMEDIATE TRANSACT
On 5 Apr 2011, at 6:54pm, Guilherme Batista wrote:
> let's say I get the number of rows from the first table scan of the
> execution. I would compare it with the number of rows defined for the table
> in sqlite_stat1 (I ran the analyze once, and there are no index in my
> tables). If the differen
To avoid races you should do this:
Main thread:
- sqlite3async_initialize()
- Starts child thread
- sqlite3_open_v2()
- sqlite3_exec(), sqlite3_prepare_v2()/sqlite3_step(), etc
- sqlite3_close()
- Halts and joins child thread
- sqlite3async_shutdown()
- exits
Child thread:
- sqlite3async
On Apr 4, 2011, at 7:10 PM, Pavel Ivanov wrote:
>> Can someone be so kind as to provide a short example of initializing
>> asynchronous module, opening DB for read/write, create a table, and write
>> some data to it?
>
> […] All you need to do is to initialize async module and call
> sqlite3as
> This currently works. But because it is not part of the language spec, we
> do not guarantee that we will continue to support it.
Thanks a lot for quick answer.
Do you mean the sqlite language spec, or the sql standard?
I would be very much in favor of keeping this behavior. It makes
select st
On 5 Apr 2011, at 3:05pm, Technology Lighthouse wrote:
> My application makes use of a number of separate SQLite DB files (in
> some cases > 100). Each DB is handled by its own thread, which may be
> making frequent small writes, or sleeping extensively then occasionally
> making a more substa
On Tue, Apr 5, 2011 at 4:05 PM, Technology Lighthouse wrote:
> Are there any hard or practical limits on the number of SQLite DBs that
> can be held open at the same time?
Not quite an answer your whole question, but possibly of interest...
The OS environment determines how many file descriptor
Thanks for the help.
I finally resolved the problem. The compile flags that I was using on
Windows were the culprit. The following set of commands correctly build the
sqlite library (build environment is Microsoft Platform SDK v6.1).
cl.exe /O2 /GL /D "WIN32" /D "_WINDLL" /D "_UNICODE" /D "UNICO
My application makes use of a number of separate SQLite DB files (in
some cases > 100). Each DB is handled by its own thread, which may be
making frequent small writes, or sleeping extensively then occasionally
making a more substantial number of writes. I'm trying to decide on a
policy for kee
On Tue, Apr 5, 2011 at 8:30 AM, Vitali Kiruta wrote:
> Hi everybody,
>
> I hope somebody could clarify this for me. According to the sql
> grammar definition, the single-source production
> does not allow the table-alias after the join-source
>
> See http://www.sqlite.org/syntaxdiagrams.html#sing
Hi everybody,
I hope somebody could clarify this for me. According to the sql
grammar definition, the single-source production
does not allow the table-alias after the join-source
See http://www.sqlite.org/syntaxdiagrams.html#single-source
However, when I'm trying to run this query it works just
How about a text editor with search and replace. There must exist a list of
the files in text form, hence search and replace gets a batch function that
uses .import
On Mon, Apr 4, 2011 at 2:41 PM, Simon Slavin wrote:
>
> On 4 Apr 2011, at 9:04pm, Gert Van Assche wrote:
>
> > We need to import t
On Tue, Apr 5, 2011 at 11:49 AM, Filip Navara wrote:
> Hello,
>
> we are having problem with database that originated on computer of one
> of our customers.
>
> The database is used in WAL mode with auto_vacuum=1 and page_size=1024.
>
> When running the "pragma incremental_vacuum(1);" command the
RAKESH HEMRAJANI wrote:
> int i=0;
> rc = sqlite3_exec(db, "insert into emp values(i);", 0, 0, &zErrMsg);
Use sqlite3_prepare_v2, sqlite3_step, sqlite3_bind_* et al to run a
parameterized query. Something like this:
sqlite3_stmt* stmt;
sqlite3_prepare_v2(db, "insert into emp values(?);", -1, &s
Hello,
we are having problem with database that originated on computer of one
of our customers.
The database is used in WAL mode with auto_vacuum=1 and page_size=1024.
When running the "pragma incremental_vacuum(1);" command the WAL file
grows to 14Mb, while we would expect it to grow only to ab
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