## Method java.sql.DriverManager.getConnection

### Use

To connect the Java application to the database instance and to open a database session, you can use the java.sql.DriverManager.getConnection method of the Java platform. This method supplies a Connection object that is connected to the database instance.

Alternatively, you can use the com.sap.dbtech.jdbcext.DataSourceSapDB class.

You can find more detailed information in the documentation on the Java platform, see sun.java.com.

### Prerequisites

● You have started the X Server (see X Server, Starting the X Server)

You have to start the X Server even if the Java application and the database instance are on the same computer.

● You have loaded the JDBC driver.

### Features

The java.sql.DriverManager.getConnection method has the mandatory parameter url (Connection URL) that can contain the following connection options.

Connection Options

Option | Default Value | Description
acceptServerCertificateAlways | off | Only for SSL connections Determines whether the database system checks if the SSL certificate of the database computer is contained in the list of the trusted certificates and whether it is still valid Possible values: off: The database system checks the SSL certificate. on: The database system does not check the SSL certificate.
autocommit | on | AUTOCOMMIT mode on: The database system ends every SQL statement automatically with a COMMIT. off: You must end transactions explicitly with the commit () and rollback () methods.

cache

-

Specifies, for which SQL statements in Prepared Statements the JDBC driver saves information (for example, on the used parameters) in a dedicated cache

Possible values:

● all: all SQL statements

● Combination of the following letters

s (SELECT statements)

i (INSERT statements)

u (UPDATE statements)

d (DELETE statements)

cache=iud

The database system saves information on INSERT, UPDATE and DELETE statements in the cache.

connectiontimeout | 0 | Timeout for the connection (in milliseconds) The value 0 means that there is no timeout.
ignoreHostNameInServerCert | off | Only for SSL connections Determines, whether the database system compares the name of the database computer with the name specified in the SSL certificate Possible values: off: The database system compares the names. on: The database system does not compare the names.

isolation

-

Isolation level for the connection

You can specify the isolation level either as a character string or as an integer (depending how you have declared it in the java.sql.Connection class).

You can enter the following character strings:

TRANSACTION_READ_UNCOMMITTED | TRANSACTION_READ_COMMITTED | TRANSACTION_REPEATABLE_READ | TRANSACTION_SERIALIZABLE

You can enter the following integer values: see Concepts of the Database System, Isolation Level.

password | - | Password of the database user Be sure to observe the use of upper and lower case, see Concepts of the Database System, Conventions for User Names and Passwords.
reconnect | on | RECONNECT mode Possible values: on: The system automatically reconnects to the database instance after a command timeout. off: There is no automatic new connection.
sqlmode | INTERNAL | SQL mode ORACLE | INTERNAL
timeout |  | Timeout for the database session (in seconds) If you specify this connection option, you override the timeout that has been configured for the database instance with the special database parameter SESSION_TIMEOUT (see Concepts of the Database System, Special Database Parameters).
trace | - | <directory>/<jdbc_trace_file> If you specify this connection option, then the database system writes a JDBC trace in the <jdbc_trace_file> file in the directory <directory>.
tracesize | - | Maximum number of lines in the JDBC trace file. If this number of lines is exceeded, the database system begins to overwrite the content of the JDBC trace file
transport | socket | Communication method for communicating with the DBM server Possible values: socket: TCP/IP connection secure: SSL connection, see Setting Up an SSL Connection
unicode | false | When you specify this connection option, the JDBC driver sends the user name, password and SQL statements in Unicode to the database instance
user | - | Name of the database user

### Example

Examples: Connecting to the Database Instance