Oracle JDBC Driver:
The Oracle JDBC Driver lets you access the data in a database in a variety of ways. For example, it can stream data from a database.
In streaming mode, data is transferred to the client as a Java InputStream object and then read when the connection is made. Alternatively, the driver can stream data as a byte array or String.
Connection pooling Oracle JDBC Driver:
Oracle JDBC Driver offers a feature known as connection pooling. The feature manages connections on a global level, rather than per schema.
In addition, the connection pool size property prevents threads from reusing connections that have been closed. This prevents unnecessary resource consumption and improves performance.
To implement connection pooling, create an instance of OracleConnectionCacheImpl and associate it with the connection cache. Then, when your application needs a connection, use the getConnection() method to get the logical connection instance from the pooled connection.
After deploying a connection pool, configure its properties. You can create a connection pool on multiple servers or just one. Most connection pools require you to configure a data source. For details, see Creating and Configuring a JDBC Data Source.
GetCursorName Oracle JDBC Driver:
To access live Oracle from a Java application, you can use the JDBC Driver. It supports both 32 and 64-bit operating systems and Unicode. It can also access remote databases.
This driver also addresses a number of issues that can affect network connections. These issues can include service delays and interruptions.
Oracle provides three different distribution files that depend on your platform. Choose the one that corresponds to your system and uninstall the previous version.
Once the installation is complete, select the appropriate JDBC driver from the product list. After selecting the right version, unzip it to c: temp and point the installer to this location.
Another problem with Netscape 3.0 is that it can only connect to Oracle databases that are on the same host. This problem can be fixed with version 4.0. The OVERLOAD column in the database will distinguish overloaded procedures.
If you have a large number of LONG columns in your database, you can use streaming mode to retrieve them from the database. This mode allows the database to send the data to the client in a stream, without having to read the data one by one.
However, there are some limitations in streaming mode, such as the size of the data. You must make sure that the amount of data in the column is not too large. Otherwise, you might encounter an error.
You can also redefine your columns by using the defineColumnType extension. You can use it to specify a LONG column from a CHAR, VARCHAR, or RAW column.
Once you’ve defined a LONG column, you need to make sure that you use the right type for the columns in your database.
Bind by name:
The Oracle JDBC Driver allows you to bind variables by name, but this feature is not supported in all versions of the driver.
This is because the driver treats bind variables as positional, and processes them in order. This behavior is not recommended. It may cause unpredictable behavior in the statement cache.
To bind by name, use a comma-separated string of objects with the same name. You can also pass the driver an object type name instead of a value. By default, the driver will use the first part of the string as the object type name, and the rest as the schema name.
You can also use a fully qualified object name if you want to bind by name but don’t want to specify the schema. Be sure to quote the type name with a dot.
Oracle Database Release 18c supports a new property called my_wallet_directory, which is used in the connection URL. You can also add it to your code or properties file. It also has an internal_logon connection property, which can be used to log on as SYSDBA or SYSOPER.
The Oracle JDBC Driver provides several methods to diagnose and resolve errors. These methods include getMessage(), get error code(), getSQLState(), and get next exception().
When these methods fail, you will receive an SQLException. The error message will include the error code, as well as information about the failure.
First, you need to connect to the Oracle database. Make sure that the version of Java and Oracle are compatible.
The version number of the driver file may differ. Secondly, the connection string may need to be different in different versions. If you use a different version of Oracle, the connection string will be different.