Home/ Questions/Q 9156161
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-17T12:43:14+00:00

For a table that has a composite row key of two integers, what should

  • 0

For a table that has a composite row key of two integers, what should be the command to get a row from hbase shell.

I have created this sample ruby script

include Java
import org.apache.hadoop.hbase.util.Bytes

id   = ARGV[0]
sid  = ARGV[1]

byte [] rowkey = Bytes.add(Bytes.toBytes(id.to_i),Bytes.toBytes(sid.to_i))
puts Bytes.toStringBinary (rowkey) 
....
....
....

The output I see when I call hbase org.jruby.Main script.rb 10 20
\x00\x00\x00\x00\x00\x00\x00\x0A\x00\x00\x00\x00\x00\x00\x00\x14 which clearly show 16 bytes long. How do I ensure that it is 8 bytes long (4 for id, 4 for sid).

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    This is because toBytes is overloaded to accept both long and int arguments, and JRuby always converts Fixnum to long. There is no way to choose the overload with the int argument.

    Instead you must use an alternate way to create the array. First initialize an empty array, and then add each ID:

    rowkey = Java::byte[8].new
Bytes.putInt(rowkey, 0, id.to_i)
Bytes.putInt(rowkey, 4, sid.to_i)
    • 0