The Connection interface establishes a connection (session) with a specific database. Within the context of a Connection, SQL statements are executed and results are returned.
A Connection's database is able to provide information describing its tables, its supported SQL grammar, its stored procedures, the capabilities of this connection, and so on. This information is obtained with the getMetaData method.
java.sql package
public interface Connection
Tabulka 97 lists the methods in the Connection interface that are
supported by DB2 Everyplace.
Tabulka 97. Connection interface methods
| Method return value type | Method |
|---|---|
| void | clearWarnings() Clears all warnings reported for this Connection object. |
| void | close() Releases a Connection's database and JDBC resources immediately instead of waiting for them to be automatically released. |
| void | commit() Makes all changes made since the previous commit or rollback permanent and releases any database locks currently held by the Connection. |
| Statement | createStatement() Creates a Statement object for sending SQL statements to the database. |
| Statement | createStatement(int resultSetType, int resultSetConcurrency) JDBC 2.0. Creates a Statement object that will generate ResultSet objects with the given type and concurrency. |
| boolean | isClosed() Tests to see if a Connection is closed. |
| DatabaseMetaData | getMetaData() Gets the metadata regarding this Connection's database. |
| SQLWarning | getWarnings() Returns the first warning reported by calls on this Connection. |
| CallableStatement | prepareCall(String sql) Creates a CallableStatement object for calling database stored procedures. |
| PreparedStatement | prepareStatement (String sql) Creates a PreparedStatement object for sending parameterized SQL statements to the database. |
| PreparedStatement | prepareStatement(String sql, int resultSetType, int resultSetConcurrency) JDBC 2.0. Creates a PreparedStatement object that will generate ResultSet objects with the given type and concurrency. |
| void | rollback() Drops all changes made since the previous commit or rollback and releases any database locks currently held by this Connection. |
| void | setAutoCommit (boolean autoCommit) Sets this connection's auto-commit mode. |
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