You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: client.rb
    path of file: ./repos/metasploit-framework/lib/rex/post/mysql/ui/console/command_dispatcher
    
    the code of the file until where you have to start completion: # -*- coding: binary -*-

require 'rex/post/sql/ui/console/command_dispatcher/client'

mod
    
          def cmd_query_help
            print_line 'Usage: query'
            print_line
            print_line 'Run a single SQL query on the target.'
            print_line @@query_opts.usage
            print_line 'Examples:'
            print_line
            print_line '    query SHOW DATABASES;'
            print_line '    query USE information_schema;'
            print_line '    query SELECT * FROM SQL_FUNCTIONS;'
            print_line '    query SELECT version();'
            print_line
          end