how can handle left outer join for any two dataset this dataset inlcude any
filed number
example on two dataset data set one
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple4<Integer, String, String,String>>
customer=env.readCsvFile("/home/hadoop/Desktop/Dataset/customer.csv")
.fieldDelimiter('|')
.includeFields("11110000").ignoreFirstLine()
.types(Integer.class,String.class,String.class,String.class);dataset two
ExecutionEnvironment orders = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, String, String>
customer=env.readCsvFile("/home/hadoop/Desktop/Dataset/order.csv")
.fieldDelimiter('|')
.includeFields("11110000").ignoreFirstLine()
.types(Integer.class,String.class,String.classs);
