I am trying to connect to SQL server 2005 via Workbench/J. I entered everything correctly for the jdbc string and I can connect to the desired server. But, I have to type fully qualified names for a table with database name. I don't want to do that. I set my instanceName to the database and it did not work for me.
Is there a way to connect to the DB instead of just the server ?
jdbc:sqlserver://serverName[\instanceName][:portNumber]
If you want to connect to an instance you need to do two things:
Make sure the SQL Server Browser service is running on your SQL Server host (disabled by default IIRC)
Do not include the portnumber in the connection string if you want to connect by instance name. The JDBC driver will ignore the instance name when the connection string includes a portnumber (each instance has its own port number)
With regard to the second item, the documentation says:
For optimal connection performance, you should set the portNumber when you connect to a named instance. This will avoid a round trip to the server to determine the port number. If both a portNumber and instanceName are used, the portNumber will take precedence and the instanceName will be ignored.
The instance name is not the same thing as your database name. You specify the database name using the connection property databaseName, eg:
jdbc:sqlserver://localhost;databaseName=AdventureWorks
Microsoft SQL Server supports multiple installs on the same computer. Each install ("virtual" SQL Server, if you will) is identified by its "Instance name". So, we could have two separate "SQL Servers" on the same computer, e.g., one instance named \PRODUCTION for the production databases, and another instance named \TEST for a test environment. Each instance operates independently.
A default installation of SQL Server Express Edition creates a SQL Server instance named \SQLEXPRESS. The other Editions of SQL Server normally create a "default instance" (sometimes identified as \).
Each instance of SQL Server can contain multiple databases. You can set the default database for your connection like this:
jdbc:sqlserver://myservername;database=myDb
or
jdbc:sqlserver://myservername;instanceName=instance1;database=myDb
I think you should be able connect to a specific database like this:
jdbc:sqlserver://serverName[\instanceName][:portNumber];databaseName=MyDatabase
Related
I have a java application which runs on IBM i. It creates connection to AS400 database using jdbc. It does not specify the database name in JDBC connection URL, means it creates connection to default system database associated with *SYSBAS.
Now I want my application to run on iASP. When running on iASP it fails to connect to database.
IBM i documentation says that we must specify RDB name in "database name" property of jdbc connection URL to connect.
problem here is that,
IBM i documentation says by default RDB name of iASP group is same as primary iASP device name in iASP group. But it can be assigned different name.
I am able to retrieve iASP group name and iASP device name programmatically using JTOPEN(by calling API QUSROBJD). Which means my application will work in default scenario. But when RDB name is assigned different name then my application may fail. I want to retrieve RDB name associated with iASP.
How can I retrieve correct RDB name for an iASP?
I tried using API QUSRJOBI, but it is returning database name as blank.
There are two types of Auxiliary Storage Pool (ASP) on IBM i: System ASPs and independent ASPs (iASP). On DB2 for i, all libraries in the system ASP are treated as a single database and you can qualify tables with a schema name to access a tables in a specific library. According to the documentation that I found, each new iASP creates a new database, and these can be queried in QSYS2.SYSCATALOGS. So you will need a connection to the system database and, from that, you can find the database name and connect to each iASP that you need a connection to. Unfortunately I cannot test this as I do not have an iASP available to me.
I don't know why this is happening error
I'm trying to simply connect my database to jdbc
In the url jdbc:mysel://localhost:test you set the host as localhost and the port as test
There is no such port called test, you need to provide a port number.
Most likely you are using the default port for mysql, so you might need to provide one at all.
Current JDBC URL using looks like
jdbc:db2://server:446/DBname
Want to connect to a different instance by providing the instance name.
How should be the connection string for this?
In jdbc you do not connect to an instance, instead you connect to a database. It is possible to ATTACH to a DB2-instance but normally you don't want to do that unless you are a DBA. To specify a different DB2-instance, mention its hostname(or IP-address, or Virtual-IP-address) and its port-number. If a hostname runs multiple DB2-instances, each DB2-instance will have a unique port-number on that hostname.
I'm trying to create a JDBC data source in Oracle WebLogic server and getting some error. I can log in the web console http://localhost:7001/console using user name + password and I followed the Youtube video / tutorial page - Configuring a JDBC data source as same.
I have a wireless connection and I get the Host name (# 12 in the tutorial ) by typing
ipconfig getifaddr en0
in the Mac OS terminal. It returns 10.131.173.138 ( the same format, I changed three random digits ) and I put it inside the Host name and also filled up all other information's. However, after that when I'm trying to test the set up by clicking Test Configuration, it returns me the following errors that I provided below -
Connection test failed.
Message icon - Error IO Error: The Network Adapter could not establish the connectionoracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:800)oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:793)oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:614)weblogic.jdbc.common.internal.DataSourceUtil.testConnection0(DataSourceUtil.java:340)weblogic.jdbc.common.internal.DataSourceUtil.access$000(DataSourceUtil.java:22)weblogic.jdbc.common.internal.DataSourceUtil$1.run(DataSourceUtil.java:254)java.security.AccessController.doPrivileged(Native Method)weblogic.jdbc.common.internal.DataSourceUtil.testConnection(DataSourceUtil.java:251)com.bea.console.utils.jdbc.JDBCUtils.testConnection(JDBCUtils.java:751)com.bea.console.actions.jdbc.datasources.createjdbcdatasource.CreateJDBCDataSource.testConnectionConfiguration(CreateJDBCDataSource.java:479)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)java.lang.reflect.Method.invoke(Method.java:606)org.apache.beehive.netui.pageflow.FlowController.invokeActionMethod(FlowController.java:870)org.apache.beehive.netui.pageflow.FlowController.getActionMethodForward(FlowController.java:809)org.apache.beehive.netui.pageflow.FlowController.internalExecute(FlowController.java:478)org.apache.beehive.netui.pageflow.PageFlowController.internalExecute(PageFlowController.java:306)org.apache.beehive.netui.pageflow.FlowController.execute(FlowController.java:336)...
I think it mainly says The Network Adapter could not establish the connection
However, I don't have much knowledge what to do to establish the connection properly. Thanks.
You need a real database with correct values in the jdbc URL:
i.e.
For example, if the database to which you want to connect resides on host prodHost, at port 1521, and system identifier (SID) ORCL, and you want to connect with user name scott and password tiger, then use either of the two following connection strings:
Using host:port:sid syntax:
String connString="jdbc:oracle:thin:#prodHost:1521:ORCL";
I have a running local instance of PostgreSql on a linux machine. When I use psql command from the shell I success to log in without any problem. I need to connect to the PostgreSql via the JDBC, but I don't know what exactly should I pass as url parameter to DriverManager.getConnection().
It should start with jdbc:postgresql: but what's going next?
I was told by the system group that a database with was created like user name. e.g. if my user is jutky a db named jutky was created, but when I try to open a connection to jdbc:postgresql:jutky I get an error
org.postgresql.util.PSQLException: FATAL: password authentication failed for user "jutky"
:(
Additional info
When I login via the psql I'm not prompted for the password, so when I try to login via JDBC I pass an empty string as a password - is it correct, or should I pass null or something?
When I type psql --help in the shell I see among the rest this line:
Connection options:
-h, --host=HOSTNAME database server host or socket directory (default: "/var/run/postgresql")
So I understand that I connect to PostgreSql via a socket directory, does that matters something to the URL string in the JDBC?
EDIT
First thanks for the answers.
Second: its not first time I'm using JDBC and in particular not the first time I'm connecting to the PostgreSql from JDBC, so I know the general rules and I have read the documentations. However in the described case I'm not sure how exactly should I construct the connection string if the instance is running via the socket directory and what password should I provide. Because when I login via the psql I'm not prompted for password at all.
Thanks in advance.
In addition to other answers note that by default Postgres is configured to accept connections via Unix sockets with authentication based on your operating system account, that's why psql works fine and doesn't require the password.
JDBC connections are made over TCP/IP with password authentication, so you need to modify pg_hba.conf accordingly. For example, this line allows TCP/IP connections from the same machine to all databases for all users with password authentication:
host all all 127.0.0.1/32 md5
After adding this line jdbc:postgresql:databasename should work.
EDIT: You can't create a JDBC connection over Unix socket since PostgreSQL JDBC driver can only work over TCP/IP. The password you use when creating JDBC connection is the password assigned to your user. If you don't have it, you can assign it, for example, using ALTER USER command. See 19.3. Authentication methods.
See also:
19.1. The pg_hba.conf file
It's all explained in official documentation.
This is the relevant part:
String url = "jdbc:postgresql://localhost/test?user=fred&password=secret&ssl=true";
Connection conn = DriverManager.getConnection(url);