Try something like this:
select house_number, street, city from table (legacy_realty_data('house_number,
street, city where price < 50'))
then parse the string passed to your table function and implement a way to push
down those predicates to your backend to only retrieve what is needed.
pureQuery may help.
--- On Wed, 4/29/09, Maggi Federico wrote:
> From: Maggi Federico
> Subject: Good, thin, ORM layer
> To: derby-user@db.apache.org
> Date: Wednesday, April 29, 2009, 2:58 PM
> Hello List,
>
> I love embedded stuff. I love SQLite and
> I love Derby even more. However, I
Plz leave catalog as null.
Ali
--- On Sun, 11/9/08, Ole Ersoy <[EMAIL PROTECTED]> wrote:
> From: Ole Ersoy <[EMAIL PROTECTED]>
> Subject: Re: DatabaseMetaData.getTables() resultset empty?
> To: "Derby Discussion"
> Date: Sunday, November 9, 2008, 8:29 PM
> Ali,
>
> I had percentage for the tab
Try % instead of null.
Ali
--- On Sun, 11/9/08, Ole Ersoy <[EMAIL PROTECTED]> wrote:
> From: Ole Ersoy <[EMAIL PROTECTED]>
> Subject: Re: DatabaseMetaData.getTables() resultset empty?
> To: "Derby Discussion"
> Date: Sunday, November 9, 2008, 8:12 PM
> Emmanuel,
>
> I gave it a go.
>
> String
Insert the string value into the table. Language does not matter.
Regards,
Ali
--- On Sun, 11/2/08, Graeme Henderson <[EMAIL PROTECTED]> wrote:
> From: Graeme Henderson <[EMAIL PROTECTED]>
> Subject: chinese text
> To: derby-user@db.apache.org
> Date: Sunday, November 2, 2008, 2:57 PM
> What is
You should have an index.
--- On Sun, 10/19/08, Amir Michail <[EMAIL PROTECTED]> wrote:
> From: Amir Michail <[EMAIL PROTECTED]>
> Subject: Re: Most efficient way to get max row id?
> To: "Derby Discussion"
> Date: Sunday, October 19, 2008, 9:18 PM
> On Mon, Oct 20, 2008 at 12:15 AM, Amir Micha
Google App Engine does not seem to be using a relational database. It looks
like a hashtable. Joins are not possible. In other words, yes some relational
database functionality is not possible to be scalable at the prices Google
offers. So Google does not provide a relational database. But this
Does the same happen if you use single thread? Does disk space use go down if
you compress table?
Should the
word=word.trim().toLowerCase();
appear before setString?
When you store the frequency of words, you would have records like:
"home", 1217
Then the number of rows would not exceed cou
for case insensitive index, you can have another column that holds lower-case
version of your original column. you can create an index on that lowercase
column and use it in your sql. you can use triggers to maintain the lowercase
column.
ali
--- On Mon, 6/23/08, Alan Burlison <[EMAIL PROTECTE
If 100 is not absolute necessity, you can give datetime ranges. For example select 1 hour of logs at a time.
Ali
--- On Tue, 5/13/08, Matt Chambers <[EMAIL PROTECTED]> wrote:
From: Matt Chambers <[EMAIL PROTECTED]>Subject: top N reporting with derbyTo: derby-user@db.apache.orgDate: Tuesday, May 13,
in derby's bin directory there is a startNetworkServer.bat
regards,
ali
wotcha <[EMAIL PROTECTED]> wrote:
Sorry if this has already been posted, but I'm a new Derby user. i've created
an application using Netbeans 6.0 and embedded Derby DB - using the tutorial
supplied by Netbeans - very im
How much memory do you give to your JVM?
Ali
John English <[EMAIL PROTECTED]> wrote:
I have a table containing about 22000 records defined as follows:
CREATE TABLE system_log (
id INTEGER GENERATED ALWAYS AS IDENTITY,
time TIMESTAMP DEFAULT NULL,
username VARCHAR(15),
facility VARCHAR(15) NOT
Have a table where you have 1 row that marks the relationship between two
clients. Like a cartesian product:
A, B
A, C
A, D
B, A
B, C
B, D
..and so on.
Have all clients have their dedicated connection acquire locks on these rows.
Each lock represents a client that may post
By the way, while deciding whether a value x== Double.Nan or not, you probably
cannot use == operator (may never be true). But if you compare string versions,
they should equal ("NaN").
Ali
Suavi Ali Demir <[EMAIL PROTECTED]> wrote:
Can you make your column nullable
Can you make your column nullable and insert null instead of Nan?
Ali
David <[EMAIL PROTECTED]> wrote:
For an application I am writing I need to store doubles in a table. I
thought I could use the DOUBLE type when creating the columns in my tables.
Unfortunately the insert fails when the
drop the table and ignore the does not exist error.
regards,
ali
Brad Berens <[EMAIL PROTECTED]> wrote:
I've googled for this but all I can find is create statements so I'm hoping
someone can just give me a quick answer. I'm trying to write some db creation
scripts. Normally in MSSQL I w
export the mysql ddl and manually convert it to derby ddl.
create the derby database schema from this ddl.
export mysql tables into delimited text files.
import data from text files.
regards,
ali
Bryan Richardson <[EMAIL PROTECTED]> wrote:
Hello all,
Can anyone tell me how I can mi
It seems you want all the repeating values next to each other? Would a sort help? Does order by work? Regards, Ali Robert Enyedi <[EMAIL PROTECTED]> wrote: Does Derby support user functions in GROUP BY clauses?I'm thinking of the following scenario:SELECT USER_FUNCTION(t1.column1)FROM TABLE t1G
Is the output of XMLSERIALIZE varchar? If you are getting back a java string (or varchar etc), there is no need for the xml header to mention encoding (already have characers). If you get back a byte[] (or binary data), it should put the xml header so that the client can parse the xml using cor
r for 3. Now I wonder what the optimizer thinks of this and how, if at all, does it parallelize the query? Ill try my sql method on a similar table to yours, but I do think the response you saw wasnt correct. From: Suavi Ali Demir [mailto:[EMAIL PROTECTED] Sent: Monday, Augu
That query needs to be modified little bit. It does not work when my table contains: 1 1 12 2 21 1 3 result is 3,3,3, where as it should have been 2,2,3. This one works: SELECT (SELECT COUNT(DISTINCT b.field1) FROM table_a b) as field1_count, (SELECT COU
What is OCCURRENCE_INT_ATTRS? View or a table? You probably have a correlated sub query that executes per row in your where clause. How does the select * from VIEW_OCCURRENCE_PRIORITY perform? If it's slow, perhaps you can re-write the whole thing (the view's select) as a join? [investigate gr
Add a new column to the table, copy the data into new column, change your view (drop-create) to start using the new column and ignore the old column in the table. Ali Edson Carlos Ericksson Richter <[EMAIL PROTECTED]> wrote: Just curious, how could a view change datatype of one column?AFAIK, I c
Updateable views would make it easy. Regards, Ali Edson Carlos Ericksson Richter <[EMAIL PROTECTED]> wrote: Unfortunately, for developers, TBDITW don't allow change column names, datatypes, nullability, etc...At least, no without large efforts (like creating a new table, migrating all data to
if it is a forward only cursor, when you do a select * and loop through all rows and doSomething() with each row (and not hold a reference to the data yourself), there would be only 1 row's data in memory at a given time, no? (or few rows if Derby prefetches in chunks as you do rs.next()) [EMAIL P
Instead of "dual", in IBM lingo, i believe that table is called SYSIBM.SYSDUMMY1. For example to test a connection you can use: SELECT 1 FROM SYSIBM.SYSDUMMY1 or yours would be: SELECT CURRENT_TIMESTAMP FROM SYSIBM.SYSDUMMY1 VALUES(1) would work in DB2/LUW but not work in OS/390 f
derby:net is to connect to the network server, which could be running on another machine. it has host:port to connect to. You start the derby network server and it runs as a database server to serve many clients. jdbc:derby:dbname is used to connect to a local database in embedded mode (derby c
Hi Jim, How much memory did your colleagues start the JVM with when they evaluated Derby? Regards, AliJim Newsham <[EMAIL PROTECTED]> wrote: Rajesh, Thanks for the update on DERBY-756. Regarding DERBY-912, I recognize that it¡¯s a subtask of 756, nevertheless 756
Hello, Does anybody know why the JDBC method: PreparedStatement.setBinaryStream(s,size) requires the caller to pass in the length of the stream? Regards, Ali
You do not necessarily need recursion to do that. Check out Ceolko's book for more info: http://www.elsevier.com/wps/find/bookdescription.cws_home/702605/description#description This small article has nice images to give you ideas: http://www.codeproject.com/database/nestedsets.asp?df=100&fo
If you can find a tool specifically written to use jdbc/odbc bridge with MS Access, then you can port the schema too. In many ODBC metadata calls MS Access reports "unimplemented function" error. So, if the tool is not written specifically for MS Access (to work around those "unimplemented function
e update you suggested works with a constant. All I neednow is to get the update to use the data from the temp table.Any idea what else I am
missing?Thanks,Ian--- Suavi Ali Demir <[EMAIL PROTECTED]>wrote:> update card set anythingyourwant where card.name in (> > select c.name> fro
update card set anythingyourwant where card.name in (
select c.namefrom edition as e, card_version as cv, card as c, edition as e2,session.load_card as lcwhere e.edition_id = cv.edition_id and c.card_id = cv.card_id and c.name = lc.name and c.card_id is not null and e.release_date < e2.release_d
SELECT CASE WHEN COL1 is NULL THEN 0 ELSE 1 END FROM MYTABLE
Regards,
AliNicolas Dufour <[EMAIL PROTECTED]> wrote:
HelloI try to put tests in select clause.I mean I have a field which can be null and I want to create a select which return 0 when the field is null and 1 in the other case.Is
You can use varchar types and inside your saveDoc() function you can save the document in smaller chunks in multiple rows with an ORDERING column. Or call it PAGE column. When you readDoc() you can assemble them back again. Table data will look like:
DOCID TEXT PAGE
1 "Hello
of optimization may be available or feasible to use at prepare> time but not execute time. > Ali> > > */Øystein Grøvlen <[EMAIL PROTECTED]>/* wrote:> > >>>>> "SAD" == Suavi Ali Demir writes:> > SAD> Another little detail about optimization
prepare time but not execute time.
Ali
Øystein Grøvlen <[EMAIL PROTECTED]> wrote:
>>>>> "SAD" == Suavi Ali Demir <[EMAIL PROTECTED]>writes:SAD> Another little detail about optimization is thatSAD> Statement.setMaxRows() kind of functions on the JDBC side m
Another little detail about optimization is that Statement.setMaxRows() kind of functions on the JDBC side may not be sufficient since it is called after SQL statement is prepared and returned as an object (after query plan is built). Therefore, it may be necessary to have language syntax to indica
same time and one thread cannot read the chunk structure while another is inserting a value into it... Come to think of it, it might run faster in single thread version when synchronization is not involved.
Regards,
Ali
Daniel John Debrunner <[EMAIL PROTECTED]> wrote:
Suavi Ali Demir wrote:>
Actually, it sounds like the problem of finding top 1000 rows out of 166333 rows is different than sorting 166333 rows and maybe it could be optimized. There is no need to sort all 166333 but the information that we are only looking 1000 rows would have to be passed all the way down to the point w
<[EMAIL PROTECTED]> wrote:
Suavi Ali Demir wrote:> After a shutdown=true, you should be able to connect to the same> database again after doing a DriverManager.registerDriver(> Class.forName(driverName).newInstance() )No, that's not the correct way to start Derby or any other JDBC
Thanks for the clarification. Some applications might be actually registering the driver themselves. What are the problems that this might cause (if the app calls DriverManager.registerDriver() explicitly)?
Regards,
Suavi
Daniel John Debrunner <[EMAIL PROTECTED]> wrote:
Suavi Ali Demir
After a shutdown=true, you should be able to connect to the same database again after doing a DriverManager.registerDriver( Class.forName(driverName).newInstance() )
Then, if the shutdown=true cleans up as you expect, that should work fine for you.
Regards,
SuaviLars Clausen <[EMAIL PROTECTED]>
Hi Bryan,
I think that other database description you mention fits mysql. It does not report errors on datatype mismatches. Instead it makes a closest guess conversion and sticks the value there. According to their docs, it does these data conversions to the closest valid value because it had no
D]> wrote:
> Thank you, Ali! I'll take a look...
>
> -----Mensagem original-
> De: Suavi Ali Demir [mailto:[EMAIL PROTECTED]
> Enviada em: sábado, 30 de julho de 2005 21:57
> Para: Derby Discussion
> Assunto: Re: how to fetch specific number of rows?
>
>
Hi Paulo,
This asp page discusses different ways of doing what
you want:
http://www.aspfaq.com/show.asp?id=2120
One of the easy SQL ways discussed there is:
To fetch 5 rows at a time and get the 3rd page you
would use this sql:
SELECT
a.empno
FROM
employee a
I
You may need to use it in a values clause in the
trigger body:
VALUES(APPBUT_USER.TRIGGER_RESIZE(schema,table))
Regards,
Ali
--- Peter Nabbefeld <[EMAIL PROTECTED]> wrote:
> Jean T. Anderson schrieb:
> > A trigger can't call a procedure, but it can call
> a user-defined sql
> > function.
> >
>
Well, since it says no suitable driver, maybe it is
sufficient to re-register the driver. Did you try a
Class.forName("drivername").newInstance() and maybe
take that instance and use
DriverManager.registerDriver(driver) ?
Regards,
Ali
--- Bernd Ruehlicke <[EMAIL PROTECTED]> wrote:
> Maybe the qu
The next import may be a table with foreign keys to
the first one. Sometimes (most of the time actually)
it is desireable to keep the original values in an
identity column.
Having to use "generated always" blocks many solutions
including import/export, replication/sync where key
space could be pa
Will derby support "default" keyword as in:
create table a(
id int not null generated by DEFAULT as identity,
...
or something like that? That would solve these
problems as it would only generate values if we do not
specify the value.
Regards,
Ali
--- Trevor Squires <[EMAIL PROTECTED]> wrote:
Does Derby use database locale or JVM locale for this
purpose?
Regards,
Ali
--- [EMAIL PROTECTED] wrote:
> Hi,
>
> As for current Derby state, is it possible to use
> localized sorting in VARCHAR and CHAR fields?
> It should be simple as Derby is pure java program.
> It just need to use proper ja
How about you first serialize your object into a
byte[] and then do a setBytes() ? And then to read it
back you can do getBytes() and then deserialize from
that byte[]. Would that work?
Regards,
Ali
--- Mithun Ruikar <[EMAIL PROTECTED]> wrote:
> Hello there ,
>
> I have problem while setting
Yes it is normal. Imagine you are starting a whole
database engine with that first connection and on top
of that you are creating a brand new database when it
is the first time:
System.out.println("creating database");
Connection conn =
DriverManager.getConnection("jdbc:derby:c:/temp/Wombat2DB;cre
values(1)
This is valid derby sql.
Regards,
Ali
--- Jonathan Eric Miller <[EMAIL PROTECTED]>
wrote:
> I'm in the process of attempting to use Derby with
> Tomcat and it's built-in
> connection pool. I'm wondering if Derby's JDBC
> driver as an "autoReconnect"
> property like MySQL has which
It may show error message if you call
Exception.getMessage() or
Exception.getLocalizedMessage() and also loop through
nested exceptions using
SQLException.getNextException() and get the nested
exceptions' stack trace and getMessage().
I think Derby does not support RETURN_GENERATED_KEYS
and neste
Should the default value be a quoted string? 0 is
probably not valid as a default value here.
defaultpageid varchar(48) default 0 not null,
Ali
--- Nonick Me <[EMAIL PROTECTED]> wrote:
> I'm trying to run the following SQL script. The
> first table is created but not for the second table
So, does this mean Derby always launches a separate
thread to process a query?
Regards,
Ali
--- Daniel John Debrunner <[EMAIL PROTECTED]> wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Bernd Ruehlicke wrote:
>
> > Hmm - this "jdbc:default:connection" is a little
> scary to me. S
connection in such cases, no?
Regards,
Ali
--- Daniel John Debrunner <[EMAIL PROTECTED]> wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Suavi Ali Demir wrote:
>
> > To clarify: You shoul NOT close the connection
> that
> > you get from the UR
; }
> finally{
> conn.close(); //can add try and catch
> here too, should you need
> }
> }
>
> Do let me know if it is otherwise
>
> -Rajesh
>
>
>
> Suavi Ali Demir wrote:
>
> >Rajesh, do you not need to close your statem
s.close();
> s1.close();
> return l;
> }catch(Exception e){
> conn.close();
> throw e;
> }
> finally{
> conn.close(); //can add try and catch
> here too, should you need
> }
> }
>
> Do let me know if it is otherwise
Rajesh, do you not need to close your statement and
result set objects in a try-finally block? rs.close
and s1.close() would be needed, no? But you should NOT
close the connection, right?
Regards,
Ali
public static long returnBigInt() throws Exception
> {
> Connection conn =
>
DriverManag
Here is an example that behaves like the
generate_unique() function of DB2:
CREATE FUNCTION GENERATE_UNIQUE()
RETURNS CHAR(13) FOR BIT DATA PARAMETER STYLE JAVA NO
SQL LANGUAGE JAVA
EXTERNAL NAME 'com.mycompany.MyClass.generate_unique';
Here is the corresponding java function in MyClass:
sta
Is there a function that gives a list of available
property names at system or database level? Or, if we
know the name of a property, can we determine it's
current value?
Regards,
Ali
--- Daniel John Debrunner <[EMAIL PROTECTED]> wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Barne
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