If so, I’d love any pointers or gotchas that it took doing to work out.
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e are quite a few changed files after REL8_1_9.
How would reindexing a table imply hours of downtime?
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related to that db. Sometimes I have some connection I'd like to
close...
set datallowconn to false in pg_database;
does it shut down the already existing ones?
No, it does not kill already existing connections to the given database.
Erik Jones
Software Developer | Emma®
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uding
those tables, restore that on a separate machine and see if these
errors crop up there anywhere. Is there anything else anyone can
think of that we can do to narrow down where the actual corruption is
or how to fix it?
Erik Jones
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plan on bringing the database down for a REINDEX
SYSTEM. Is there anything else anyone can think of that we can do to narrow
down where the actual corruption is or how to fix it?
--
Erik Jones
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directio on. We only at
the beginning of a lot of systems migrations and restructuring so now
that we have some new avenues and room to experiment, I'll try to
post our results in a couple weeks.
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ults of select queries are
relations representing relationships between data in other relations
so they can themselves be used in select queries (as well as updates,
deletes and, as of 8.2, insert and copy statements).
Erik Jones
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se with a lot of careful work it may be possible.
See the chapter on Backup and Restore in the manual for the details
of how PITR works (http://www.postgresql.org/docs/8.2/interactive/
backup.html).
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just look through it with
PGAdmin. In
an organized way, how can I find out what those dependents are?
If I need to use pg_depend, I could use some help in how to do that.
Thanks!
Have you looked at the output of \d in psql?
Erik Jones
Software Developer | Emma®
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x27;m correct, then for large databases wherein it can
take hours to take a base backup, is there anything to be gained by
using incrementally updated backups?
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e the following:
firstname
---
John
Mark
Jennifer
Thanks again for all of your help today. Everything you guys have
been sending has produced successful results.
Try something along the lines of:
SELECT substring(firstname from '^(\w*)\W') from table_name;
Erik
On Jun 25, 2007, at 3:40 PM, Simon Riggs wrote:
On Mon, 2007-06-25 at 13:42 -0500, Erik Jones wrote:
It is my understanding that once a standby server has reached the
point where it is often waiting for wal files to replay, it is pretty
much caught up to the primary server, with the
On Jun 25, 2007, at 4:40 PM, Simon Riggs wrote:
On Mon, 2007-06-25 at 16:00 -0500, Erik Jones wrote:
On Jun 25, 2007, at 3:40 PM, Simon Riggs wrote:
If I'm correct, then for large databases wherein it can
take hours to take a base backup, is there anything to be gained by
suggestions?
Thanks
Jaime
The way we usually handle situations similar to this is to use
network mounts of directories that are visible from both servers
using, say, nfs.
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On Jun 29, 2007, at 10:15 AM, Jim Nasby wrote:
On Jun 25, 2007, at 4:54 PM, Erik Jones wrote:
On Jun 25, 2007, at 4:40 PM, Simon Riggs wrote:
On Mon, 2007-06-25 at 16:00 -0500, Erik Jones wrote:
On Jun 25, 2007, at 3:40 PM, Simon Riggs wrote:
If I'm correct, then for large data
ich
you can then bring up in recovery mode and have it play up until a
transaction id you specify.
The main point here is that PITR requires and, is run on, a base backup.
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SELECT COUNT(*) INTO no_rows FROM tbl_concurrent;
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-
you can't know for sure in what state the
replica is, and that is actually harder to investigate than the
master,
as you can execute no SQL on the replica).
Anyway, that's it... it looks the problem is gone, and the DB will be
moved to another box to postgres 8.2.4 via slony. I
hink I need
a nice clear concise explanation of how the magic of a relational
database transactions are done.
I'll go see if I can find one. If anyone has a pointer to one,
that will help me the most right now.
The postgres docs are great: http://www.postgresql.org/docs/8.2/
int
ur dump was in the same encoding as the
database you created on your Windows server?
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V
dead horse is collecting flies if anyone wants to
take a swing at it... I'll stop now. :-)
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On Aug 9, 2007, at 1:14 PM, Greg Smith wrote:
On Thu, 9 Aug 2007, Erik Jones wrote:
Perhaps we could have a nice, friendly discussion on using
surrogate primary keys v. string based keys? Or, I think the body
of the "nulls are bad" dead horse is collecting flies if anyone
wan
.). Unless you know
all of the potential caveats associated with php's persisent postgres
connections and have a use case that fits them, don't use them. If
you need something to pool connections, look at pgpool.
Erik Jones
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h you're writing for which ever
user whose permissions the trigger function is executed as.
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p that table,
aggregate the updates to the cache table, then delete the interim
entries just processed. Oh yeah, you could simplify that function a
lot by simply initializing your cache table with a row for each
category with sum_val = 0. Then it's all updates and you don't need
t
imize for those.
Also, in many cases for reporting apps, 10 minutes is not long at
all. If you have reports that you can't make happen faster, schedule
and automate them.
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On Aug 15, 2007, at 11:14 AM, Pavel Stehule wrote:
2007/8/15, Erik Jones <[EMAIL PROTECTED]>:
On Aug 15, 2007, at 4:57 AM, Pavel Stehule wrote:
I write sample about triggers and i have question. is my solution
correct and exists better solution?
Regards
Pavel Stehule
DROP SCHEMA saf
Thoughts?
SELECT ... FOR UPDATE should only be locking the rows returned by
your the select statement, in this case the one row. You can check
what locks exist on a table (and their type) with the pg_locks system
view.
Erik Jones
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On Aug 15, 2007, at 2:39 PM, [EMAIL PROTECTED] wrote:
Erik Jones wrote:
On Aug 15, 2007, at 1:09 PM, D. Dante Lorenso wrote:
...to ensure that only one server is processing the queue item,
so inside PGSQL, use SELECT ... FOR UPDATE to lock the row...
When my server is under severe load
On Aug 15, 2007, at 9:21 PM, D. Dante Lorenso wrote:
Erik Jones wrote:
On Aug 15, 2007, at 2:39 PM, [EMAIL PROTECTED] wrote:
Erik Jones wrote:
On Aug 15, 2007, at 1:09 PM, D. Dante Lorenso wrote:
...to ensure that only one server is processing the queue item,
so inside PGSQL, use SELECT
the FB BLOB support.
Actually, Postgres's large object facility allows storage of binary
data up to 2GB in size. http://www.postgresql.org/docs/8.2/
interactive/largeobjects.html
Erik Jones
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OR REPLACE FUNCTION public.ffoo(list sometype[]) RETURNS VOID
AS $$
BEGIN
execute 'select * from foo where foo_column::text in (' ||
array_to_string(list, ',') || ');';
END;
$$
LANGUAGE plpgsql;
Note that if foo_column is already a text type you don't need
o do: reuse existing connections. In our tests, we saw a 2x speed
improvement over connect(). Again, I understand that pgpool will do
even better ...
We were just talking about this less than two weeks ago: http://
archives.postgresql.org/pgsql-general/2007-08/msg00660.php
Erik Jones
So
On Aug 23, 2007, at 1:27 PM, Tom Lane wrote:
Erik Jones <[EMAIL PROTECTED]> writes:
On Aug 23, 2007, at 11:56 AM, Gustavo Tonini wrote:
I want to create a function that receive a list argument and filter
data with IN operator. Example:
CREATE OR REPLACE FUNCTION public.ffoo(list so
ed
Postmaster: 24576 total in 2 blocks; 20264 free (155 chunks); 4312 used
ErrorContext: 8192 total in 1 blocks; 8176 free (4 chunks); 16 used
2007-08-08 20:21:05 CDT 3716 :ERROR: out of memory
2007-08-08 20:21:05 CDT 3716 :DETAIL: Failed on request of size
268435452.
Erik Jones
Softw
ur logs for errors so
if anything else comes up I'll be sure to share.
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On Aug 24, 2007, at 4:18 PM, Matthew wrote:
Hey Bill,
It does not.
Bummer.
To get your columns in a specific order, specify the column names in
that order in your SELECT statement. The SQL standard doesn't
provide
for any other way to guarantee column order, and neither does
reate a table from which all of your partitioned tables
inherit. Partition in such a way that you can use constraint
exclusion and then you can treat the parent table like the view you
were suggesting.
Erik Jones
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On Aug 25, 2007, at 2:58 PM, Erik Jones wrote:
On Aug 24, 2007, at 7:41 PM, Benjamin Arai wrote:
Hi,
I have an application which loads millions of NEW documents each
month
into a PostgreSQL tsearch2 table. I have the initial version
completed
and searching performance is great but my
t; before that commit or you'll get duplicate key errors
immediately.
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12MB.
The X4600 runs with 64-bit Dual Opterons.
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--
ing through Usenet, please send an appropriate
subscribe-nomail command to [EMAIL PROTECTED] so that
your
message can get through to the mailing list cleanly
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tom lane
Also, in your original post you mentioned a "proprietal CMS system".
Is this proprietary to your company or one that you've purchased?
The fact that the same table going on multiple dbs all being run by
that CMS system certainly makes it worthy of suspicion.
Erik
) this has happened.
What kind of monitoring do you have set up on your DBs? Have you
verified that the table's files are still on disk after it's
"disappeared"?
Erik Jones
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Em
x27; FOR '#')
I get NULL inserted but no WARNING's.
A point if the right direction would be appreciated.
Try
INSERT INTO ... VALUES(SUBSTRING(usernumber FROM E'^\\+?1?(.*)'));
Erik Jones
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On Aug 27, 2007, at 7:57 PM, Kamil Srot wrote:
Tom Lane wrote:
Kamil Srot <[EMAIL PROTECTED]> writes:
Erik Jones wrote:
Have you verified that the table's files are still on disk after
it's "disappeared"?
Do not have any idea how to do it... I wasn't able t
RAINT pkey_table_short_form_name PRIMARY KEY (a,b,c)
That's not really clear from the top of the CREATE TABLE docs but
there's an example at the bottom that shows it.
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, we hope you find/fix the problem before
things get really ugly)
Will post about every relevant doings to this issue...
Thanks!
--
/me remembers Pete Rose.
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coming from autovacuum, likely?
Such was my original supposition given that the memory context output
that preceded the actual error in my log included a line for
"Autovacuum Context: ..."
Erik Jones
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un autovacuum so
no problem with parallel vacuums. In addition, Solaris doesn't have
overcommit.
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what
your looking for, type
\df pg_get*
in psql and you see a listing of available functions that'll give you
just what you're looking for and are documented in Section 9.19 of
the manual (http://www.postgresql.org/docs/8.2/interactive/functions-
info.html).
Erik Jones
ver's data directory involve, at some
point, shutting down the db. Alternatively, if you're running out of
space on the disk currently holding the data, you can add another
drive in a new tablespace.
Erik Jones
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Hi,
Why not generate a random number in your application and then:
SELECT *
FROM table_x
WHERE condition = true
OFFSET generated_random_number
LIMIT xx
Kaloyan Iliev
That won't work without some kind of a priori knowledge of how many
rows the query would return without the offset and
[dblink.o] Error 1
In the src/contrib/dblink/ directory of the source tree you built
postgres from just do
make
make install
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e.
I'm curious, given that Postgres wasn't even an SQL-centric database
when the original project ended, how much of the current Postgres
code base still contains code from the original project before the
incorporation of SQl rename to PostgreSQL?
Erik Jones
Software Developer | Em
level cache of data,
is normally implemented at the application layer, often using
something like memcached. However, if he can narrow his "events"
down to specific tables, then he can use the LISTEN/NOTIFY mechanism
with triggers on those tables to good effect.
Erik Jones
Softwar
g.
What it is lacking, however, is timestamps in the output when it
successfully recovers a WAL file. Was there something more ou were
looking for?
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On Sep 13, 2007, at 3:02 PM, Jeff Davis wrote:
On Thu, 2007-09-13 at 14:05 -0500, Erik Jones wrote:
If you include the -d option pg_standby will emit logging info on
stderr so you can tack on something like 2>> logpath/standby.log.
What it is lacking, however, is timestamps in the outpu
rpose? Is it possible to have FK that spans into child tables?
I'm assuming you just left out an INHERITS clause or ALTER TABLE
statement to add the inheritance? Anyways, the answer to your
question is no, you'll need to create any dependencies to child
tables separately.
ing,
is there anyone out there using bash on mac os who knows how to fix
this?
Thanks,
Jason
---(end of
broadcast)---
TIP 3: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faq
Erik Jones
Software Developer
mp into (i.e. in the format
returned by Perl's or PHP's time()). I know of SQL NOW(), but I
want to insert a "cooked" timestamp from the outside most
efficiently. How?
Thanks.
---(end of
broadcast)---
TIP 2: Don
Have you had any other
kind of abnormal performance issues (other errors, system crashes,
etc...)? The more info you give, the better help you can receive.
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in pg_depend (as well
as others) so that when you try to access that table it isn't finding
the related, dependant objects. Others may know more, but I don't
know enough to help you get your catalogs back in order past
restoring from a backup. Also, if I were you I'd
g files if i do that?
Josh
If you can successfully drop those tables, then yes. Given that this
is just a test database, if you have any issues doing that, I'd scrap
the whole database.
Erik Jones
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, thanks for telling.
Thanks for reading, any help is appreciated.
You could use a trigger function in an untrusted procedural language
such as plperlu or plpythonu to do that.
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ble/
index sees a lot of updates. For my example where each tuple sees
only one update, the index default fill factor of 90% is probably fine.
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t.
Also, note that once we have HOT, figuring out fill factor for
indexes will be a whole different ball game. Currently, an update to
any tuple in a table, results in a new index entry. With hot, index
entries will only happen if the indexed column is changed in the update.
Erik Jones
On Sep 19, 2007, at 11:00 AM, Richard Broersma Jr wrote:
--- Erik Jones <[EMAIL PROTECTED]> wrote:
Also, note that once we have HOT...
I am not sure what the acronym "HOT" stands for. Does it have
something to do with MVCC?
Heap Only Tuple. Here's a link to the
nk it should
take so
long...
Why does everyone leave of the IO subsystem? It's almost as if many
people don't realize that disks exist ...
I have disks?
You ARE have disks ;)
Erik Jones
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Just a quick question. Are there any issues or incompatibilities
that I should be aware of if I want to build out 64 bit binaries to
run on a db that's previously been run by 32 bit binaries?
Erik Jones
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On Sep 21, 2007, at 11:59 AM, Joshua D. Drake wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Erik Jones wrote:
Just a quick question. Are there any issues or incompatibilities
that I
should be aware of if I want to build out 64 bit binaries to run
on a db
that's previously
On Sep 21, 2007, at 12:02 PM, Alvaro Herrera wrote:
Erik Jones wrote:
Just a quick question. Are there any issues or incompatibilities
that I
should be aware of if I want to build out 64 bit binaries to run
on a db
that's previously been run by 32 bit binaries?
Obviously yo
ate a query
that
returned a TRUE/FALSE column that checks if there is a 'baz' record
for
a specified 'bar_id' in all 'foo_id's in one query?
I hope this isn't too muddy. I think part of my problem is I am
having
trouble even visualizing my question...
T
chanism only handles up to 1GB values. So,
they are not specialized versions of any other data type, they are
their own, separate data type.
http://www.postgresql.org/docs/8.2/interactive/largeobjects.html
Erik Jones
Software Developer | Emma®
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ty.
4) How do I determine in general if the db has a memory bottleneck
vs CPU bottleneck vs I/O bottleneck? I know about pg_statio, just
not sure how to guage where the db is the most constrained.
You will need OS tools to handle those metrics. Look into vmstat and
ipcs for memory, i
1.c
The simplest thing I can think of in your case would be to do a
little bit of text processing on that field before inserting it. If
you simply insert dashes between the different fields so that you
have DD-MM-YYY then you can do
SET DateStyle TO 'DMY';
and then your copy
use, the particular field
name could be used but I think that would probably work a little
differently on the backend although not being involved with the
backend I'm no expert.
Just a random idea anyway.
Erik Jones
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do a dump/
restore using the new version's pg_dump and pg_restore apps.
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r of date
fields. Here is the code, in case anyone need it.
I'm glad you got something working. However, out of morbid
curiousity I have to ask: why did you use C for that when you could
have done it with at most a three line script or even one line
directly from the shell?
Erik Jon
least some idea of what these processes are (or,
are not) doing, run an strace (or your OS's equivalent) on the
process before killing it. Let us know what you see there.
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Emma he
c.relkind IN ('r' )
AND nc.nspname = 'my_schema'
ORDER BY relname
Or, just:
SELECT 'TRUNCATE ' || schemaname || '.' || tablename ';'
FROM pg_tables
WHERE schemname='my_schema'
ORDER BY tablename;
Erik Jones
Software Developer | Emma®
[EMAIL
stgres
Day and OSCON just a couple of months ago I couldn't really ask my
company to cover another trip to the same place so soon. But,
there's always PGCon next May!
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Emm
the problem you're trying to solve, not the
serialization issue you're having above. I recommend changing your
schema.
I, also, agree. The "problem" you're trying to avoid with having
separate tables for colors, kinds, etc. is exactly what a relational
data
orks, but it's sometimes a bit of a headache turning things
around
so they fit this structure. Are there standard solutions to this that
work better?
You could use after triggers on your circle and shape tables to
automatically make the insert into shapes for you.
Erik Jones
Sof
refer to not resort to kernel-level netfilter trickery to
accomplish this, if possible.
You can separate listen addresses with commas:
listen_address = '127.0.0.1,192.168.0.1'
AFAIK, you only get one port per cluster.
Erik Jones
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amount
FROM (SELECT ID, code, amount
FROM table_name
UNION
SELECT null, code, sum(amount)
FROM table_name
GROUP BY code) t
ORDER BY code, test1_id
Note that I didn't test that
Erik Jones
Software Developer | Emma®
[EMAI
FROM shapes
shape_id 1
area 78.5398
This works to store the area of the shape, but doesn't allow me to
work
with work with more complicated structures. I'll try and think up a
better example and send it along to the list when I can describe it.
Erik Jones
Software Devel
eir children is not a boy." So,
for a parent with both a boy and a girl, the boy is not a girl and
the girl is not a boy. You could replace the <> ANY with a simple IN
as then it would be "Give me all parents who have both a boy and a
girl."
Erik Jones
Software Deve
he 8.2.5 to fix this issue. Am I thinking
right?
Would appreciate any other suggestions.
Thank you very much in advance.
Reimer
Are all of these remote connections from the same machine? Did you
upgrade your client postgres libraries on your remote machine(s) as
well?
Erik Jones
S
ainly not a scenario you
should dismiss as not credible because of timescales.
If the query is always based on a primary key + XMIN, and since
vacuum is the only thing that sets FrozenTransactionId, would it be
unsane to change the update to
- update row with "... where pk=... and XMIN I
se in shared
libraries (small model). Permits references to, at most, 2**11 unique
external symbols.
So, with x86 architectures, -KPIC only works with the small model
whereas you've defined the medium model. My bet is that you need to
do away with the -KPIC flag.
Erik Jones
Software
ffers" but the
comment in the config for max_connections mentions raising
shared_buffers to accommodate more.
Erik Jones
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.
Are you restricted to keep that second server in that special run-
level? If not, I'd consider using pg_standby with WAL archiving to
keep your failover server at most a handful of minutes behind.
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615.
On Oct 12, 2007, at 2:40 PM, John D. Burger wrote:
DB-related humor:
http://xkcd.com/327/
Yes, there have been many great xkcd comics, but that one should go
down in history.
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Emma
none of the Postgres lists are
appropriate places for top-posting (I moved your response to the
bottom).
Erik Jones
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Visit
stored on its own just like with any other independent relation.
Erik Jones
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-
; TO newuser;'
FROM pg_class c, pg_namespace c
WHERE c.relnamespace=n.oid
and n.nspname = 'your_schema_name';
Erik Jones
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d think the list would be pretty long and
deal with lots of internals terms.
My vote too. Just noticed I missed (probably one of many):
BLOB - Binary Large Object
As far as missed goes, I believe I saw OLAP but not OLTP.
Erik Jones
Software Developer | Emma®
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erformance than
general-purpose software.
That and they've probably been reading a lot of reddit which has had
a fairly large number of posts over the past few months along the
lines of "CouchDB is the future for everything!!!" or "RDBMS are old
technology solution that no
ldn't change any table data would be
dwarfed by the overhead of making that check on every update.
However, the current behaviour does seem to be logical; we did in
fact ask
for the row to be updated ...
Right. And, as someone else pointed out, it also allows any triggers
on the t
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