java.sql.Statement¶
This section describes java.sql.Statement, the interface for executing SQL statements.
Method Name | Return Type | Support JDBC 4 |
|---|---|---|
close() | void | Yes |
execute(String sql) | boolean | Yes |
executeQuery(String sql) | ResultSet | Yes |
executeUpdate(String sql) | int | Yes |
getConnection() | Connection | Yes |
getResultSet() | ResultSet | Yes |
getQueryTimeout() | int | Yes |
getUpdateCount() | int | Yes |
isClosed() | boolean | Yes |
setQueryTimeout(int seconds) | void | Yes |
setFetchSize(int rows) | void | Yes |
cancel() | void | Yes |
Note
Using setFetchSize can reduce the memory occupied by result sets on the client. Result sets are packaged into cursors and segmented for processing, which will increase the communication traffic between the database and the client, affecting performance.
Database cursors are valid only within their transaction. If setFetchSize is set, set setAutoCommit(false) and commit transactions on the connection to flush service data to a database.