I m playing with the JDBC/MySQL 5.1. I created an insert query to insert some data into a table and want to return the generated key from the newly created row. However, when I go to reference the column by "id" which is my PK and auto-increment column.
PreparedStatement ps = St0rm.getInstance().getDatabase("main")
.prepare("INSERT INTO quests (name,minlevel,start_npc,end_npc) VALUES(?,?,?,?)", true); // creates a prepared statement with flag RETURN_GENERATED_KEYS
// ...
int affected = ps.executeUpdate();
ResultSet keys = ps.getGeneratedKeys();
if (affected > 0 && keys.next()) {
St0rm.getInstance().getLogger().warning(String.format("ID Column Name: %s", keys.getMetaData().getColumnName(1))); // says the column name is: GENERATED_KEY
q = new Quest(keys.getInt(1)); // column index from the generated key, no error thrown.
q = new Quest(keys.getInt("id")); // actual column name, line throws a SQLException
// ...
}
因此,我的问题:Why do ResultSet.getGeneratedKeys useGENERATED_KEY as栏目?