The Java Developers Almanac 1.4


Order this book from Amazon.

   
Home > List of Packages > java.sql  [73 examples] > Updatable Result Sets  [8 examples]

e273. Creating an Updatable Result Set

An updatable result set allows modification to data in a table through the result set. If the database does not support updatable result sets, the result sets returned from executeQuery() will be read-only. To get updatable results, the Statement object used to create the result sets must have the concurrency type ResultSet.CONCUR_UPDATABLE.

The query of an updatable result set must specify the primary key as one of the selected columns and select from only one table. For some drivers, `SELECT * FROM my_table' will return a read-only result set, so make sure that you specify the column names.

See also e272 Determining If a Database Supports Updatable Result Sets.

    try {
        // Create a statement that will return updatable result sets
        Statement stmt = connection.createStatement(
            ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
    
        // Primary key col_string must be specified so that the result set is updatable
        ResultSet resultSet = stmt.executeQuery("SELECT col_string FROM my_table");
    } catch (SQLException e) {
    }

 Related Examples
e272. Determining If a Database Supports Updatable Result Sets
e274. Determining If a Result Set Is Updatable
e275. Updating a Row in a Database Table Using an Updatable Result Set
e276. Cancelling Updates to an Updatable Result Set
e277. Inserting a Row into a Database Table Using an Updatable Result Set
e278. Deleting a Row from a Database Table Using an Updatable Result Set
e279. Refreshing a Row in an Updatable Result Set

See also: Batching    Connections    Database Meta Data    Deleting Data    Drivers    Importing and Exporting    Inserting and Updating Data    Oracle OBJECTs    Oracle VARRAYs    Procedures and Functions    Retrieving Data    Scrollable Result Sets    Tables   


© 2002 Addison-Wesley.