Error while trying to use --boundary-query argument in sqoop import
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
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
add a comment |
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
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
To gain the better understanding of using boundary-query, use this link
– Raghavendra Gupta
Dec 19 '18 at 13:12
add a comment |
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
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
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
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
asked Nov 12 '18 at 15:53
Sarvagya Dubey
6910
6910
To gain the better understanding of using boundary-query, use this link
– Raghavendra Gupta
Dec 19 '18 at 13:12
add a comment |
To gain the better understanding of using boundary-query, use this link
– Raghavendra Gupta
Dec 19 '18 at 13:12
To gain the better understanding of using boundary-query, use this link
– Raghavendra Gupta
Dec 19 '18 at 13:12
To gain the better understanding of using boundary-query, use this link
– Raghavendra Gupta
Dec 19 '18 at 13:12
add a comment |
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To gain the better understanding of using boundary-query, use this link
– Raghavendra Gupta
Dec 19 '18 at 13:12