Error while trying to use --boundary-query argument in sqoop import











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I am learning sqoop on my own and tried to run the below mentioned code to retrieve the first 3000 records from the database and evenly split by primary key emp_no



 sqoop import 



 --connect jdbc:mysql://localhost/employees 



 --username root 



 -P 



--query 'select * from employees WHERE $CONDITIONS ORDER BY emp_no LIMIT 3000' 



--split-by emp_no 



-m 3 



--target-dir sqoop/import_data/employee_db_import 



--delete-target-dir


The above statements yielded evenly distributed results 1000 records per mapper.



Now for further learning I added the --boundary-query argument as



 --boundary-query 'select MIN(emp_no),MAX(emp_no) from employees'


to the above statement and the map reduce job is now reading 9000 records from the database. I want to know why is this happening ?






mysql hadoop mapreduce sqoop







share|improve this question


























    up vote
    0
    down vote

    favorite












    I am learning sqoop on my own and tried to run the below mentioned code to retrieve the first 3000 records from the database and evenly split by primary key emp_no



     sqoop import 
    

    
 --connect jdbc:mysql://localhost/employees 
    

    
 --username root 
    

    
 -P 
    

    
--query 'select * from employees WHERE $CONDITIONS ORDER BY emp_no LIMIT 3000' 
    

    
--split-by emp_no 
    

    
-m 3 
    

    
--target-dir sqoop/import_data/employee_db_import 
    

    
--delete-target-dir


    The above statements yielded evenly distributed results 1000 records per mapper.



    Now for further learning I added the --boundary-query argument as



     --boundary-query 'select MIN(emp_no),MAX(emp_no) from employees'


    to the above statement and the map reduce job is now reading 9000 records from the database. I want to know why is this happening ?






    mysql hadoop mapreduce sqoop







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I am learning sqoop on my own and tried to run the below mentioned code to retrieve the first 3000 records from the database and evenly split by primary key emp_no



       sqoop import 
      

      
 --connect jdbc:mysql://localhost/employees 
      

      
 --username root 
      

      
 -P 
      

      
--query 'select * from employees WHERE $CONDITIONS ORDER BY emp_no LIMIT 3000' 
      

      
--split-by emp_no 
      

      
-m 3 
      

      
--target-dir sqoop/import_data/employee_db_import 
      

      
--delete-target-dir


      The above statements yielded evenly distributed results 1000 records per mapper.



      Now for further learning I added the --boundary-query argument as



       --boundary-query 'select MIN(emp_no),MAX(emp_no) from employees'


      to the above statement and the map reduce job is now reading 9000 records from the database. I want to know why is this happening ?






      mysql hadoop mapreduce sqoop







      share|improve this question













      I am learning sqoop on my own and tried to run the below mentioned code to retrieve the first 3000 records from the database and evenly split by primary key emp_no



       sqoop import 
      

      
 --connect jdbc:mysql://localhost/employees 
      

      
 --username root 
      

      
 -P 
      

      
--query 'select * from employees WHERE $CONDITIONS ORDER BY emp_no LIMIT 3000' 
      

      
--split-by emp_no 
      

      
-m 3 
      

      
--target-dir sqoop/import_data/employee_db_import 
      

      
--delete-target-dir


      The above statements yielded evenly distributed results 1000 records per mapper.



      Now for further learning I added the --boundary-query argument as



       --boundary-query 'select MIN(emp_no),MAX(emp_no) from employees'


      to the above statement and the map reduce job is now reading 9000 records from the database. I want to know why is this happening ?






      mysql hadoop mapreduce sqoop




      mysql hadoop mapreduce sqoop






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked yesterday









      Sarvagya Dubey

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      699





























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