Initial support for streaming responses.

lib/async/mysql/client.rb

@@ -19,6 +19,7 @@
 # THE SOFTWARE.
 
 require 'async/wrapper'
+require_relative 'stream'
 
 require 'mysql2'
 
@@ -36,11 +37,15 @@ def query(sql, **options)
 
 				wait_readable
 
-				return @client.async_result
+				if options[:stream]
+					return Stream.new(self, @client.async_result)
+				else
+					return @client.async_result
+				end
 			end
 
 			def respond_to?(*args)
-				@client.respond_to(*args)
+				@client.respond_to?(*args)
 			end
 
 			def method_missing(*args)

lib/async/mysql/stream.rb

@@ -0,0 +1,46 @@
+# Copyright, 2018, by Samuel G. D. Williams. <http://www.codeotaku.com>
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+module Async
+	module MySQL
+		class Stream
+			def initialize(client, result)
+				@client = client
+				@result = result
+			end
+
+			def each(&block)
+				@result.each do |fields|
+					yield fields
+
+					# @client.wait_readable
+				end
+			end
+
+			def respond_to?(*args)
+				@result.respond_to?(*args)
+			end
+
+			def method_missing(*args)
+				@result.send(*args)
+			end
+		end
+	end
+end

spec/async/mysql/client_spec.rb

@@ -15,4 +15,15 @@
 			connection.close
 		end
 	end
+
+	it "can stream results" do
+		results = connection.query("SELECT * FROM seq_1_to_3", stream: true)
+
+		results.each do |fields|
+			pp fields
+		end
+		# expect(.to_a).to be == [{"seq" => 1}, {"seq" => 2}, {"seq" => 3}]
+
+		connection.close
+	end
 end