/**
* Initializes the map-part of the job with the appropriate input settings.
*
* @param job The map-reduce job
* @param inputClass the class object implementing DBWritable, which is the Java object holding
* tuple fields.
* @param inputQuery the input query to select fields. Example : "SELECT f1, f2, f3 FROM Mytable
* ORDER BY f1"
* @param inputCountQuery the input query that returns the number of records in the table. Example
* : "SELECT COUNT(f1) FROM Mytable"
* @see #setInput(Job, Class, String, String, String, String...)
*/
public static void setInput(
Job job, Class<? extends DBWritable> inputClass, String inputQuery, String inputCountQuery) {
job.setInputFormatClass(DBInputFormat.class);
DBConfiguration dbConf = new DBConfiguration(job.getConfiguration());
dbConf.setInputClass(inputClass);
dbConf.setInputQuery(inputQuery);
dbConf.setInputCountQuery(inputCountQuery);
}
