derby

I have a project using derby and JPA. I can connect to the database fine within my application. I would like to connect to the embedded database with SQL Developer so I can easily browse/query the data in the database. Here is the derby dependency I'm using: <dependency> <groupId>org.apache.derby</groupId> <artifactId>derby</artifactId> <version>10.7.1.1</version> </dependency> Here is the the connection info I'm using for JPA: <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/> <property name="javax.persistence.jdbc.url" value="jdbc:derby:fs-hash

I am trying to alter a datatype for a derby db column. The current price column is set as DECIMAL(5,0). I would like to alter it to DECIMAL(7,2). I did this : alter table item alter column price set data type DECIMAL(7,2); But it did not work, and showing the error: Error: Only columns of type VARCHAR may have their length altered. May I know how is it possible to alter it? Thank you. Here is the Derby SQL script to change column MY_TABLE.MY_COLUMN from BLOB(255) to BLOB(2147483647): ALTER TABLE MY_TABLE ADD COLUMN NEW_COLUMN BLOB(2147483647); UPDATE MY_TABLE SET NEW_COLUMN=MY_COLUMN; ALTER

I'd like to have a peek at Derby's database log; I don't mean the derby.log file, I'm talking about the binary log files in the /[database name]/log directory. Is there a tool that can display them in a human-readable format? My reason for asking is that I'm using Apache Derby (version 10.6.1.0) for automatic integration tests, with the help of Maven Failsafe plug-in. Some tests execute transactional code that locks records (OpenJPA is used as an ORM tool). Sometimes, with a certain ordering of tests, it happens that a test waits forever for a lock, causing the build to hang. The same test,

Using Apache Derby with Java (J2ME, but I don't think that makes a difference) is there any way of checking if a database already exists and contains a table? I know of none, except few work around, unlike MySQL where we have that facility of IF EXIST. What you do is, try to connect to the database, if couldn't its likely its not there. And after a successful connection, you can do a simple select, like SELECT count(*) FROM TABLE_NAME, to know whether the table exist or not. You would be depending on the exception. Even in an official example from Sun, I have seen the similar work around. In

My application at present uses Microsoft Access, but now may be hosted on Linux boxes. Additionally while being accessed from multiple computers, one of these may update the records (when its being read by other users). I also require that the embedded database should support complex SQL queries - like inner SQL, Joins, etc. I tried SQLite , but many of the existing queries fail, or need to be fixed (like in a simple query using inner join the brackets after FROM was not acceptable to SQLite, and had to be removed). Right join too is not supported. I came to know about Apache Derby and H2 ,

I'm using Eclipse EE Kepler and I'm trying to run derby in my program. I added to my build path derby.jar and derbyclient.jar and still I'm getting the following error: java.lang.ClassNotFoundException: org.apache.derby.jdbc.EmbeddedDriver . Can someone help me with solving this problem? I stuck with the same problem 'java.lang.ClassNotFoundException: org.apache.derby.jdbc.EmbeddedDriver'. In my case, scope attribute is set to test <!-- https://mvnrepository.com/artifact/org.apache.derby/derby --> <dependency> <groupId>org.apache.derby</groupId> <artifactId>derby</artifactId> <version>10.13.1