impala-ruby
This is a ruby client for Cloudera Impala. You use it like this:
require 'impala'
Impala.connect('host', 21000) do |conn|
conn.query('SELECT zip, income FROM zipcode_incomes LIMIT 5')
end
# => [{:zip=>'02446', :income=>89597}, ...]You can also use cursors to avoid loading the entire result set into memory:
conn = Impala.connect('host', 21000)
cursor = conn.execute('SELECT zip, income FROM zipcode_incomes ORDER BY income DESC')
one_row = cursor.fetch_row
cursor.each do |row|
# etc
end
conn.close