derby

问题 i am using my following code in eclipse using derby database,but getting the error as Insufficient data while reading from the network - expected a minimum of 6 bytes and received only 0 bytes. The connection has been terminated. at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source) at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source) at org.apache.derby.jdbc.ClientDriver.connect(Unknown Source) at java.sql.DriverManager.getConnection

问题 This is in continuation to my previous question I'm trying to embed a derby database in my web application. I'm able to embed it, though I am facing glitches. Here's the snapshot of my project structure. I wonder why class.forName("org.apache.derby.jdbc.EmbededDriver") is throwing exception? java.lang.ClassNotFoundException: org.apache.derby.jdbc.EmbededDriver To overcome this, I have used DriverManager.registerDriver(new org.apache.derby.jdbc.EmbeddedDriver()); Which works well. Why is it so

问题 I am trying to learn how to do a PreparedStatement as follows: createConnection(); conn.setAutoCommit(false); String sql = "SELECT MAX(?) FROM ?"; PreparedStatement stmt = conn.prepareStatement(sql); However, when I hit the last line, it throws a java.sql.SQLSyntaxErrorException as follows: java.sql.SQLSyntaxErrorException: Syntax error: Encountered "?" at line 1, column 20. I have searched everywhere but cant find any reason for it to fail. What am I doing wrong? later on in the code I am

问题 I'm trying to use Derby in my school project but i have some issues. my DB is named theaterDB, derby 10.2.1, JDBC 3.0.0 Each SQL request i make through java does not succeed... I can't understand why. For example, the request: SELECT * FROM User returns an exception: java.sql.SQLSyntaxErrorException: Schema 'ADMIN' does not exist Another SQL that is not working : ALTER table theaterDB."Projection" ADD INDEX(fk_Projection_Movie(Movie_id)); Syntax error: Encountered "" at line 1, column 45.

问题 I am using Glassfish 3.1.2 and Eclipselink 2.4.1 (at least I thought so!) and derby (from Glassfish as JTA resource). When accessing the Entities in my app via "XXXX:8080/myapp/persistence/, I get the following error. Please note: the "Eclipselink Persistence Service" is reported with version 2.3.2, which looks strange to me, too. I would expect to see my configured version 2.4.1 (see below). Any ideas? INFO: JTS5014: Recoverable JTS instance, serverId = [100] INFO: [EL Info]: 2013-04-05 17

问题 I have created a Derby Embeded DB in netbeans. Now I can not find the folder in which DB is placed by netbeans. My connection URL is jdbc:derby:Inventory;create=true; . Where does netbeans place the DB file by default? I am using Ubuntu 12.04. 回答1: The Default Linux Netbeans Database Folder : /home/username/.netbeans-derby/ there is a folder Inventory netbeans 7.2.1 : /home/username/.netbeans/7.2.1/derby/ you can search with sudo find / -name Inventory -print Properties : right click Java DB

问题 I want to setup a derby database on IntelliJ IDEA. I have searched a lot for this issue but I could not find a useful answer. Every time I try to connect to the derby database, I get the following error. Can anyone help me fix this issue? java.sql.SQLException: Failed to create database 'C:/Users/Omar/IdeaProjects/untitled3', see the next exception for details. at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source) at org.apache.derby.impl.jdbc.SQLExceptionFactory

问题 I need to compare a date and a timestamp in a SELECT query. Normally, this is supported by most other DB platforms(MySQL, MSSQL, Oracle, etc.) but in Derby it throws this error: Caused by: java.sql.SQLSyntaxErrorException: Comparisons between 'DATE' and 'TIMESTAMP' are not supported. Types must be comparable. String types must also have matching collation. If collation does not match, a possible solution is to cast operands to force them to the default collation (e.g. SELECT tablename FROM

问题 sorry if this is a poor question but this one feature have been driving me mad for days so i thought id post it here to see if you guys can help me basically all i want to do from a jsf page have the user search a user and for me to return all the details <h:form id="searchForm"> <h:outputLabel value="Search: " style="font-weight:bold" /> <h:inputText id="search" value="#{userdetailsController.search}" /> <h:commandButton value="Search" action="index"/> </h:form> that is the jsf page, working

问题 Can I use reserved keywords as column names in Derby? I'm trying to migrate database schema into Derby for testing purposes. For that reason I don't really want to change the schema structure (column names etc). So the question is, how can I create table with column name "open" in Derby? As for example table: create table test ( open integer ); Tried to quote the column name, but so far no success... java.sql.SQLSyntaxErrorException: Syntax error: Encountered "open" at line 1, column 21. at