derby

Do I have to set both sides for a bidirectional relationship?

由 旧城冷巷雨未停 提交于 2019-11-28 05:05:06
问题 @Entity public class A { @GeneratedValue @Id private long id; public long getId() { return id; } public void setId(final long id) { this.id = id; } @OneToMany(mappedBy = "a") List<B> bs; public List<B> getBs() { return bs; } public void setBs(final List<B> bs) { this.bs = bs; } } @Entity public class B { @GeneratedValue @Id private long id; public long getId() { return id; } public void setId(final long id) { this.id = id; } @ManyToOne @JoinTable A a; public A getA() { return a; } public void

Derby's handling of NULL values

由 。_饼干妹妹 提交于 2019-11-28 04:48:03
问题 I am new to Derby and I noticed that I face similar problems as when using the DB2 RDBMS as far as null values are concerned. The Derby documentation states, that a null value must have a type associated with it (something that DB2 finally got rid of in version 9.7): http://db.apache.org/derby/docs/10.7/ref/crefsqlj21305.html Now, I am trying to find a general solution to this problem here as this will be a part of my database abstraction library jOOQ. The below example just documents the

Schema is not dropped on hbmddl.auto = create.drop

由 耗尽温柔 提交于 2019-11-28 04:07:06
问题 I am using hbmddl.auto set to create in the hibernate configuration file and using it to connect to the derby database in network mode (not embedded, don't know if that is relevant). Here is my hibernate.cfg.xml <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- Database connection settings --> <property name="connection.driver_class">org

Derby embedded database 'APPDATA' folder not found, Trying to create OS X application .app

由 五迷三道 提交于 2019-11-28 02:18:01
问题 I am trying to create a Mac OS X application from java desktopos.jar, where my application .jar file using derby embedded database APPDATA. It creates problem when, I'm createing a Mac OS X application .app Here is my connection method on java(Already working on .exe and setup-Windows & Linux) public static Connection getdataconnet() { Connection connect = null; try { Class.forName("org.apache.derby.jdbc.EmbeddedDriver"); connect = DriverManager.getConnection("jdbc:derby:APPDATA", "xxxx",

SQLNonTransientConnectionException: No current connection, in my application while interacting with Derby database

由 喜欢而已 提交于 2019-11-28 00:30:12
问题 I implemented derby data base in my application to save my data,and I am getting this exception in retrieval of result set form select query in Derby database. To establish the connection I use connection string as: I establish connection using this method: I declare this method in class Connection.java : public synchronized Connection createConnection() throws Exception { Connection rescon = null; try { if (this.dbuser == null) { rescon = DriverManager.getConnection(this.URI + ";create=true"

Caused by: ERROR XSDB6: Another instance of Derby may have already booted the database

由 六月ゝ 毕业季﹏ 提交于 2019-11-27 21:57:14
I am trying to run SparkSQL : val sqlContext = new org.apache.spark.sql.hive.HiveContext(sc) But the error i m getting is below: ... 125 more Caused by: java.sql.SQLException: Another instance of Derby may have already booted the database /root/spark/bin/metastore_db. at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source) at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source) at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source) at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown

Caused by: ERROR XSDB6: Another instance of Derby may have already booted the database

由 久未见 提交于 2019-11-27 21:34:18
问题 I am trying to run SparkSQL : val sqlContext = new org.apache.spark.sql.hive.HiveContext(sc) But the error i m getting is below: ... 125 more Caused by: java.sql.SQLException: Another instance of Derby may have already booted the database /root/spark/bin/metastore_db. at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source) at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source) at org.apache.derby.impl.jdbc

How to get rid of derby.log, metastore_db from Spark Shell

由 余生长醉 提交于 2019-11-27 18:51:09
When running spark-shell it creates a file derby.log and a folder metastore_db . How do I configure spark to put these somewhere else? For derby log I've tried Getting rid of derby.log like so spark-shell --driver-memory 10g --conf "-spark.driver.extraJavaOptions=Dderby.stream.info.file=/dev/null" with a couple of different properties but spark ignores them. Does anyone know how to get rid of these or specify a default directory for them? hiryu The use of the hive.metastore.warehouse.dir is deprecated since Spark 2.0.0, see the docs . As hinted by this answer , the real culprit for both the

Unable to start derby database from Netbeans 7.4

由 ╄→尐↘猪︶ㄣ 提交于 2019-11-27 17:29:57
I downloaded Netbeans 7.4 and Java 7 Update 51. I get the below error when I try to start Java DB or derby connection from Netbeans. This is on a windows 8 PC. I downloaded the version for windows xp 32 bit at work. It works fine. I am not sure what is missing. Thu Jan 16 00:48:23 EST 2014 : Security manager installed using the Basic server security policy. Thu Jan 16 00:48:24 EST 2014 : access denied ("java.net.SocketPermission" "localhost:1527" "listen,resolve") java.security.AccessControlException: access denied ("java.net.SocketPermission" "localhost:1527" "listen,resolve") at java

Derby Auto Increment by 100 when specified as 1

由 夙愿已清 提交于 2019-11-27 15:47:40
In used query to create derby database table consist of primary column auto increment. CREATE TABLE \"table\" (\n" + " \"id\" INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1) NOT NULL,\n" + " \"path\" VARCHAR(2000) DEFAULT NULL,\n" + " \"downloaded\" BOOLEAN DEFAULT false NOT NULL,\n" + " \"retried_times\" SMALLINT DEFAULT 0 NOT NULL,\n" + " \"name\" VARCHAR(40),\n" + " \"downloaded_date\" TIMESTAMP DEFAULT NULL,\n" + " PRIMARY KEY (\"id\")\n" When i insert a row through spring jdbc it increment by 100. Is there any error in query? This is due to pre-allocation of
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