Sqoop import without primary key in RDBMS

Question

Can I import RDBMS table data (table doesn't have a primary key) to hive using sqoop? If yes, then can you please give the sqoop import command.

I have tried with sqoop import general command, but it failed.

Answer 1

If your table has no primary key defined then you have to give -m 1 option for importing the data or you have to provide --split-by argument with some column name, otherwise it gives the error:  

ERROR tool.ImportTool: Error during import: No primary key could be found for table <table_name>. Please specify one with --split-by or perform a sequential import with '-m 1'

then your sqoop command will look like

sqoop import \
    --connect jdbc:mysql://localhost/test_db \
    --username root \
    --password **** \
    --table user \
    --target-dir /user/root/user_data \
    --columns "first_name, last_name, created_date"
    -m 1

or

sqoop import \
    --connect jdbc:mysql://localhost/test_db \
    --username root \
    --password **** \
    --table user \
    --target-dir /user/root/user_data \
    --columns "first_name, last_name, created_date"
    --split-by created_date