19.04.2019 10:36, Mark Rotteveel wrote:
I'll need to investigate how I can unload and reload the library.
You can prevent fb_shutdown() from shutting client library down using
fb_shutdown_callback().
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19.03.2019 17:03, Leyne, Sean wrote:
Was wondering if increasing the number of slots would reduce the wait %.
No. It will only reduce "Hash lengths (min/avg/max)" which are already fine
in your case.
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07.03.2019 16:56, Adriano dos Santos Fernandes wrote:
For *_TZ types, alignment is not a problem, the size is. Or at least
it may look weird - UTC+TZ together occupy 10 bytes but sqllen
returns 12 bytes.
And code will get crashed on memcpy(some_buffer, sqldata, sqllen).
Why it will crash?
07.03.2019 16:25, Adriano dos Santos Fernandes wrote:
sizeof(ISC_TIMESTAMP_TZ) == 12
i.e. the whole structure is padded (with two bytes) at the end
I'm not sure whether it's "as desired" though. IIRC, alignment/padding
is implementation-defined in C++, we're playing on the tricky field.
But
04.03.2019 14:57, Alex Peshkoff via Firebird-devel wrote:
May be taht makes sense - in a case when we start to work with TZ-related data we should
already have connection with any engine.
In this case IAttachment must be a parameter for util functions to know which server to
ask for
01.03.2019 11:32, Alex Peshkoff via Firebird-devel wrote:
But if one writes some funny plugin which generates random names in authentication block -
definitely yes :)
They don't need to be random. I can imagine cases when they are a) tied to a current
node in a cluster because Firebird
01.03.2019 8:59, Alex Peshkoff via Firebird-devel wrote:
Mapped user name has nothing to do with connection pool.
Are you sure that there will be never a case when single client-side user name is
mapped to different server-side users depending on some conditions unknown to client?
--
28.02.2019 20:42, Adriano dos Santos Fernandes wrote:
Then the question: for what the client would need to known the mapped
user name?
The simplest example: connection pool must grouped by user name because currently there
is no way to change current user of already established connection.
24.02.2019 3:23, Adriano dos Santos Fernandes wrote:
maybe:
SET TRANSACTION SNAPSHOT [USING SNAPSHOT ]
or
SET TRANSACTION SNAPSHOT [USING SNAPSHOT NUMBER ]
What I dislike here is double SNAPSHOT words.
You can make it optional.
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23.02.2019 17:51, Paul Reeves wrote:
It is linked to the fact that rpm installs don't allow
interaction at install time, so the security database is not
initialised.
IIRC, rpm install 2.5 used to initialize security database using random password for
sysdba. Was it changed in 3.0?
--
21.02.2019 10:46, Pavel Cisar wrote:
It's tempting, but I see potential for problems. If we would allow multiple sets & filters
at master node, there is no need to have them at replica. And if replica would have
different definitions than master, then it's not possible to replace master with
21.02.2019 9:14, Dmitry Yemanov wrote:
Second, IMHO declaring tables as "publishable" via CREATE|ALTER TABLE is too restrictive.
I'd rather manage the replication set using some global commands, be it ALTER DATABASE or
something different, allowing to include/exclude all tables at once, or
18.02.2019 13:01, Alex Peshkoff via Firebird-devel wrote:
Just notice - if you do not use this function you will never have performance
issue with it.
It depends on the place where Vlad will put the TIP refresh to.
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18.02.2019 12:55, Alex Peshkoff via Firebird-devel wrote:
On the other hand this should better be fixed afterwards - design where SS/CS provide
different results is IMHO not good. Something like awful borland's SPB items that provide
useful results only in SS. Well Borland can be excused here
18.02.2019 12:47, Adriano dos Santos Fernandes wrote:
If the change is going to appear only in Beta 2, then ok and I file a
ticket. Otherwise a ticket would not be necessary as the feature didn't
appeared in any alpha/beta release yet.
This change AFAIU will make Firebird even slower than it
Hello, All.
I'm working on controlling of replication using SQL and get stuck on "alter table"
statement. It may include zero or more clauses that require modification of RDB$RELATIONS
table. For example: "alter table t drop sql security, disable replication".
What is the best way to
16.02.2019 15:57, Mark Rotteveel wrote:
I was wondering if it was considered to also set these options through the DPB. Especially
for time zone support, I'm currently considering not supporting this for Java 7 in
Jaybird, and it would save some headaches if it were possible to control this
Hello, Dmitry.
I see that now system tables are replicated unconditionally:
> if (!relation->isSystem() && matcher &&
!matcher->matchTable(relation->rel_name))
>return;
How does it cooperate with separate replication of DDL queries?
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15.02.2019 9:17, Paul Reeves wrote:
First you need to click on the 'Desktop Development with C++'
You are talking about installing of Visual Studio. My question was different: is Build
Tools
(https://blogs.msdn.microsoft.com/vcblog/2016/11/16/introducing-the-visual-studio-build-tools/)
Is "Build Tools" enough for that or whole Visual Studio 2017 must be
installed?
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Hello, All.
Currently if plugin module has been found but is bad an error is thrown even if this
plugin is not required.
Is it a desired behavior?
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08.02.2019 12:29, Alex Peshkoff via Firebird-devel wrote:
- adapt search knowing existing versions numbers (see
http://site.icu-project.org/download)
Yes, this should be efficient.
I would limit tried versions to only those which are known to work with
Firebird.
For example, cut off
08.02.2019 16:44, marius adrian popa wrote:
What type of UUID we use in Firebird ?
I guess Version 1
Look at text presentation. UUID version is fourth digit in second group IIRC.
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08.02.2019 14:01, Jiří Činčura wrote:
ALTER SEQUENCE?
But please explain what do you mean under 'restart'.
Without changing the current value.
Try CREATE OR ALTER SEQUENCE. I cannot remember if I ported this improvement from
Avalerion to main tree.
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08.02.2019 12:21, Alex Peshkoff via Firebird-devel wrote:
The error you are getting is different, so I would guess that search loop is aborted
faster in this case.
Is it good idea to provide full error message? (like I did - not to make other
guess)
Not in this case, but here it is:
08.02.2019 10:15, Vlad Khorsun wrote:
Also, we could limit number of ICU versions to check:
- exclude really old versions (at least with old X.Y versioning scheme, i.e.
4.8 and older)
- adapt search knowing existing versions numbers (see
http://site.icu-project.org/download)
- guess number
08.02.2019 8:31, Alex Peshkoff via Firebird-devel wrote:
I can't reproduce performance problem:
# time (echo 'exit;' | ./isql employee)
Statement failed, SQLSTATE = XX000
Could not find acceptable ICU library
-Missing entrypoint u_setDataDirectory in ICU library
The error you are getting is
Hello, All.
I somehow understand why build of current HEAD is failing with message "Could not find
acceptable ICU library", but I wonder why it takes so much time to get this error? More
than 15 second between running of isql and this failure on my notebook.
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BTW, TPB item is better because DPB item would require to know server version before
connect while TPB can be decided after the connect is established and server version has
been derived from ODS or other info item.
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02.02.2019 12:08, Dmitry Yemanov wrote:
What usage cases do you have in mind?
Multimaster. There must be some way to prevent data bouncing when CDC captures changes
made by apply module.
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Hello, Dmitry.
Currently replication can be disabled only at database level. Are you going to provide
a way to disable it for single connection or transaction?
Trick with isc_dpb_config won't work for superserver AFAIU.
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24.01.2019 15:14, Adriano dos Santos Fernandes wrote:
But if we have some libraries in the application loading Firebird, and
the application writer does not have total control of that, two
libraries may load Firebird and when one of them calls the shutdown
function, the other will not work
12.01.2019 17:11, Alex Peshkoff via Firebird-devel wrote:
appears -fabi-version switch is not enough.
Did you full clean rebuild with it?
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10.01.2019 15:35, Alex Peshkoff via Firebird-devel wrote:
If we want to support Centos 7 (latest stable Centos release) we will have to use dinosaur
gcc4 i.e. same version we use to build FB3.
You can also try to use -fabi-version=8 for build.
Side-note: "if" is a right word. Personally I
10.01.2019 15:35, Alex Peshkoff via Firebird-devel wrote:
That's the worst thing that could happen when testing. If we want to support Centos 7
(latest stable Centos release) we will have to use dinosaur gcc4 i.e. same version we use
to build FB3.
How about using --static-libstdc++?
--
29.12.2018 11:10, Adriano dos Santos Fernandes wrote:
The cached in request value is now the timestamp with tz, then localtimestamp requires a
conversion.
If request requested timestamp without tz, why it caches it with tz?
That conversion requires to open ICU calendar to get the effective
26.11.2018 16:18, Leyne, Sean wrote:
What about external tools which might use this field for their own purposes???
These tools will be broken by proposed changes as isc_database_info() will start
returning different data type or different value.
Summarizing whole discussion, there are
26.11.2018 11:54, Dimitry Sibiryakov wrote:
no functionality is depended on it with such precision that would require taking time zone
into account.
Besides, storage change is not enough, INF items must be changed accordingly and it
would be a really break of backward compatibility
24.11.2018 11:42, Dmitry Yemanov wrote:
Good plugin should never clash with user-defined metadata. Any hardcoded name for
user-defined metadata objects is a subject of potential conflict. Using RDB$ prefix for
non-system objects is a hack I'd rather avoid. What other options do you see?
24.11.2018 6:43, Dmitry Yemanov wrote:
It could be, but new system generator is also an ODS change. IIRC, we don't have a safety
gap between system and user generator IDs.
It doesn't need to be a system generator. Plugin is free to create a user one (as well
as any other database object) if
23.11.2018 21:36, Vlad Khorsun wrote:
...recently invented SCN
Recently ? What do you speak about ?
"When any transaction is committed, database Commit Number is incremented and
its value is associated with this transaction".
IIRC, the journal counter does exactly the same.
--
23.11.2018 20:43, Dmitry Yemanov wrote:
can store sequence number elsewhere (and it did until recently), but it's more error-prone
to store it inside the database itself. Header page is an obvious choice. RDB$DATABASE is
another option, but it's also an ODS change.
Isn't a sequence even
23.11.2018 20:09, Dmitry Yemanov wrote:
(1) Database GUID and (2) journal sequence.
Both are not absolutely required but useful.
AFAIU, journal sequence is completely plugin-related thing. I understand why your
plugin wants to keep it in database, but why in header?
Is replication going
23.11.2018 18:07, Alex Peshkoff via Firebird-devel wrote:
But if others do think that accessing such databases is possible may be we should better
set current minor to 1 and also set ODS_RELEASED = 1 ? This should help efficiently avoid
opening alpha-created databases by stable release.
23.11.2018 16:32, Alex Peshkoff via Firebird-devel wrote:
Older gstat and third-party tools won't be able to handle it correctly.
What gstat version do you talk about?
Particularly Avalerion one. It does not support full functionality for unknown ODS, but
at least it try to dump fixed
23.11.2018 15:53, Adriano dos Santos Fernandes wrote:
Does anyone see any problem in extending (in time zones branch)
hdr_creation_date to include the time zone?
Older gstat and third-party tools won't be able to handle it correctly.
Do we need timezone there at all? If yes, it is better
06.11.2018 15:46, Alex Peshkoff via Firebird-devel wrote:
As long as we have safe write order to database file it should not be corrupted due to
unexpected interrupt. Even FW is not needed for it - nothing prevents OS to flush cache to
the disk after application was interrupted.
Actually,
06.11.2018 15:46, Alex Peshkoff via Firebird-devel wrote:
The user has a chance to avoid engine shutdown on signal caught using
fb_shutdown_callback() but that will be his choice.
There is a problem with older applications that know nothing about
fb_shutdown_calback() but still handle
06.11.2018 13:15, Alex Peshkoff via Firebird-devel wrote:
It can.
But if one does
kill `pidof firebird`
or presses ctrl-C when working with embedded library atexit is not called.
I see. But how about not calling fb_shutdown if old signal handler is not
SIG_DFL?
BTW, I cannot find in
06.11.2018 7:34, Alex Peshkoff via Firebird-devel wrote:
An idea was to have same behavior for remote and embedded connections, please read
doc/README.fb_shutdown, pay attention at fb_shut_confirmation and a sample in the end.
All this workaround for workarounds just because engine cannot be
: Engine
Affects Versions: 3.0.4, 4.0 Alpha 1
Environment: Windows
Reporter: Dimitry Sibiryakov
If you open date/time control panel and change time zone, Firebird will return
wrong time until restart. It is caused by MSVC runtime caching current time
zone offset in global
Hello, All.
Consider a program which handle SIGINT by asking user if it really need to be
interrupted. On answer "No" it can continue work. But currently it cannot because
background thread already called fb_shutdown() and destroyed everything.
Is it a right behavior for client library?
27.10.2018 14:28, Karol Bieniaszewski wrote:
I do not have core dump because engine did not crashed.
What next?
Make it crashing by setting of BugcheckAbort in firebird.conf.
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27.10.2018 10:49, Karol Bieniaszewski wrote:
What can i do to fix this?
Make sure that you checkout-ed the tree with platform-specific line ending.
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25.10.2018 15:05, Gabor Boros wrote:
I have the 2 hours numbers and attached the refreshed picture. 2.5 is still the fastest.
Is it the truth or I made a mistake somewhere?
It is kinda expected. How many worker isqls you had?
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24.10.2018 12:51, Adriano dos Santos Fernandes wrote:
if UNICODE (sensitive) has problems, as
it has
I cannot remember that in this thread anyone said that it has problems.
Subject is "Case (and accent) *insensitive* ICU collations".
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23.10.2018 11:36, liviuslivius wrote:
why "LOCALTIMESTAMP" not "LOCAL_TIMESTAMP" as is for e.g. "CURRENT_TIMESTAMP"?
SQL standard.
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22.10.2018 17:28, Gabor Boros wrote:
How long distance is enough for the correct results?
Usually it is run for 2-3 hours at least.
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22.10.2018 15:37, Gabor Boros wrote:
Why the big difference between numbers which result from the same version?
OLTP emul is based on random. It cannot be used as a reliable benchmark on
short distances.
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19.10.2018 14:03, Adriano dos Santos Fernandes wrote:
ICU generates sort key for a single string. For multi segment (columns)
index/sort, Firebird call ICU (or any collation) for each column and
join the generated fully (with all levels/strengths) sort keys.
AFAIK, sorting key is just an
01.10.2018 16:27, Adriano dos Santos Fernandes wrote:
Usage of FETCH seems good here, then I believe the production of rows
would need a YIELD .
Why to invent a new syntax instead of assignment + SUSPEND which everybody
got used to?
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01.10.2018 15:35, Adriano dos Santos Fernandes wrote:
A single (aggregate) function call should not produce (describe) more
than one column in a query.
Where is such limitation described except current codebase?
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01.10.2018 12:41, Adriano dos Santos Fernandes wrote:
Saying that aggregate functions should return more than one data with a
feature different than ROW type, is like saying our function (and any
language's function) is broken.
No thing is broken. ROW type is just a syntax sugar. But if you
01.10.2018 12:22, Simonov Denis via Firebird-devel wrote:
Current SPs do not know how to aggregate data by an external cursor. To do this, you need
to write queries inside the SP.
How is this related to (in)ability to return several values at once?
create aggregate function custom_avg (i
01.10.2018 12:07, Simonov Denis via Firebird-devel wrote:
To return more than one value you need support for ROW types. Otherwise, the function
still does not extract more than one value.
Current SP can return several values without any new type.
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01.10.2018 11:24, Pavel Cisar wrote:
Aggregates could produce various single-value outputs
Why to limit them to single value? Some aggregates could profit if they are able to
return more values at once. For example, avg + deviation.
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29.09.2018 16:30, Dmitry Yemanov wrote:
AFAIU, Adriano's point is more about technology (use stall mode for the function request),
syntax may be adjusted. We may choose a different keyword, if necessary (as a syntax sugar
for the same BLR verb).
Ok. How simple is this technology from engine
29.09.2018 14:32, Adriano dos Santos Fernandes wrote:
The focus is to have a feature well integrated with Firebird others features.
I don't think that to bring completely new meaning ("pull a row from set") to existing
well-known keyword SUSPEND (used to be "push a row into result set") is
29.09.2018 14:02, Adriano dos Santos Fernandes wrote:
My propose is to use the same elegant concept for aggregation. Your example seems much
more confusing. It makes sense thinking on interfaces, but very different from Firebird
way of doing things.
Yes, but being similar to others (PG or
28.09.2018 18:34, Adriano dos Santos Fernandes wrote:
Design is open if good alternatives are presented. Initially I think:
Why not simply borrow Oracle concepts as you did with packages?
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15.08.2018 17:28, Alex Peshkoff via Firebird-devel wrote:
For single request no boost, but when we talk about server under high load serving
multiple requests performance boost will be present.
What could cause it given that I/O is already parallelized by storage system?
"Very big
15.08.2018 16:43, Alex Peshkoff via Firebird-devel wrote:
Taking into an account that this is suggested for FB4 (not 2.5) I do not see problems with
security.
Imagine server configured with DatabaseAccess = none and/or database configured with
SecurityDatabase = other.db. What will happen
15.08.2018 16:13, Alex Peshkoff via Firebird-devel wrote:
In the simplest form (create database on current server) that will look like
this:
execute statement 'create database ''/tmp/t1''';
What about security and other settings? Will newly created database use default ones or
somehow
24.07.2018 17:28, Helge Schild wrote:
Is there a different firebird server for TCP/IP connections than for
connections thru a local file path? The latter works fine.
With Firebird 3 local file path in connection string usually end up in using embedded
mode which don't need running server.
24.07.2018 14:17, Helge Schild wrote:
What could be wrong?
A lot of things. The most obvious one: Firebird server is not run.
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24.07.2018 13:43, Mark Rotteveel wrote:
The term SCN is already used by nbackup, lets not muddle the waters by overloading it for
another usecase.
Taking into account usage of "SCN" term in Oracle, it is better to invent a new one for
nbackup than for transaction-related counter.
--
24.07.2018 10:13, liviuslivius wrote:
It can provide simple way to retrive new records/changes in tables (new
feature).
E.g. whe can then do
SELECT * FROM TABLEX WHERE CN>:SCN;
You already can do it with RDB$RECORD_VERSION.
--
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23.07.2018 21:12, Adriano dos Santos Fernandes wrote:
So the problem happens when preprocess.bat is with unix eol, correct?
Yes. That's why .gitattributes should contain "*.bat eol=crlf" setting.
Nobody cared to add it into project's file, so everyone has to set it globally on every
23.07.2018 20:56, Adriano dos Santos Fernandes wrote:
Why the problem does not happen with the others epp files?
Why the problem (GPRE not reading mixed eol markers?) fixed instead?
Windows CMD magic. Note that these files are not intended to be preprocessed
in boot phase.
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23.07.2018 20:46, Adriano dos Santos Fernandes wrote:
Is these errors happening on your local Windows machines too?
Yes, unless line "*.bat eol=crlf" is added to file ".gitattributes" before
checkout.
--
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23.07.2018 20:18, Vlad Khorsun wrote:
> const SSHORT l = (SSHORT) MIN(length, INET_remote_buffer)
If length >= INET_remote_buffer
It can't happen
Then MIN() here has no meaning.
and INET_remote_buffer == 32768
This is not the case
Yes, fortunately.
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23.07.2018 19:42, Vlad Khorsun wrote:
Note, upper allowed value for INET_remote_buffer is MAX_DATA_HW (32768).
That's bad.
> const SSHORT l = (SSHORT) MIN(length, INET_remote_buffer)
If length >= INET_remote_buffer and INET_remote_buffer == 32768, l will be -1.
--
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23.07.2018 15:07, Alex Peshkoff via Firebird-devel wrote:
I tried to reproduce this with c++ client. I did the following - set in FB4
TcpRemoteBufferSize=8191, connected to it using FB3 client (to avoid having same size
preset at both ends of wire link) 'isql -user sysdba -pas masterkey
22.07.2018 14:56, Mark Rotteveel wrote:
If I change one of the two test classes that triggers this problem to create a single
database for the entire test class, the problem changes from a too large buffer being read
(which causes the hang) to an error
Unsupported or unexpected operation code
25.06.2018 12:29, Tony Whyman wrote:
There is nothing theoretical about brute force attacks. They always work, the only issue
how long they take.
Look at my answer to Alex. This is topic about replacing error "shit happen" with
something useful for diagnostic.
--
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25.06.2018 11:14, Alex Peshkoff via Firebird-devel wrote:
Bruteforce passwords over the wire. We are still missing any passwords regulation (like
min.length, UP/low letters, etc.) i.e. people can use passwords like 'pass' and such
things can be bruteforced.
This attack does not depend on
25.06.2018 11:29, Tony Whyman wrote:
Even if it were still computationally infeasible to break Srp today, it is probably that
in the next few years it will be totally broken.
You missed my words "non-theoretical".
--
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24.06.2018 20:09, Adriano dos Santos Fernandes wrote:
Here is a valid ISQL code with "TERM ;" and "AUTOTERM ON":
Check it with packages.
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19.06.2018 15:42, Alex Peshkoff via Firebird-devel wrote:
I plan to clean up support of them except anonymous (it may be used to ping server) in
HEAD. Any objections?
I would vote to clean out "service_mgr" as well and either to ignore this part of
connection string completely or threat it
15.06.2018 17:19, Mark Rotteveel wrote:
Having to rely on external lists like the Firebird 2.5 language reference is a bit too
brittle for my tastes, I'd like the truth according to the Firebird itself.
But documentation is the only place where you can see name of variable and its meaning.
14.06.2018 17:47, Alex Peshkoff via Firebird-devel wrote:
Can you explain a reason why your plugin can not use functions exported from
some library?
I prefer not to add another dependency layer without extreme need. Synchronization of
internal thread during library unload is already
14.06.2018 17:20, Dmitry Yemanov wrote:
IIRC, gds__log() is exported from fbclient.
Yes, but everything that a plugin has is IMaster. I can get log dir from it, so I can
write my own log alongside to firebird.log, but writing into firebird.log itself could
provide more consistent picture
Hello, All.
In my plugin I start a thread that do some internal work common for all plugin's
instances. If this thread encountered some errors, I would like to log them somehow to let
administrator a hint what is wrong before killing whole process.
Is there a way for a plugin to write a
08.06.2018 17:47, Hristo Stefanov wrote:
It has 4 cores but the openssl benchmark is single threaded. Here are
the repeated benchmarks with the openssl process pinned to a single
core on the Intel(R) Core(TM) i5-2500 CPU:
It doesn't matter for speculative execution. Run 4 benchmarks in
08.06.2018 17:19, Hristo Stefanov wrote:
After running some benchmarks of CBC and XTS mode it turns out XTS is
about 4 times faster on the following hardware:
Intel(R) Core(TM) i5-2500 CPU
There is no wonder at: your CPU has 4 cores and CBC cannot be parallelized. The
difference should be
08.06.2018 15:44, Hristo Stefanov wrote:
With future ODS changes this may not be the case.
Any ODS will have some kind of internal headers in the beginning of data just because
there is no way to get rid of them.
--
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08.06.2018 14:25, Hristo Stefanov wrote:
Yes CBC mode does that but since it is applied using the same IV and the
same key multiple times it is open to chosen-plaintext attacks as noted
here:
https://defuse.ca/cbcmodeiv.htm
A more real world example is given here:
08.06.2018 11:01, Vlad Khorsun via Firebird-devel wrote:
Another question is how to handle rollback error. I mean rollback that run
at catch block. I offer to ignore rollback error (maybe log it into
firebird.log,
if database is not bug-checked) - we can do nothing with it anyway.
I'd
07.06.2018 22:52, Hristo Stefanov wrote:
I started the discussion because of this presentation:
https://www.firebirdsql.org/file/community/conference-2016/encrypting-firebird-databases.pdf
with the following quote:
Known issue:
– Encrypted size == initial size
I don't understand why this
07.06.2018 19:47, Alex Peshkoff via Firebird-devel wrote:
Access to server's file system and server's RAM are rather different things.
Not quite so. If someone can write a library into plugins subdir - memory is
accessible. Of course, no write access to FS makes things a little harder.
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