push the collectors up to the abstract adapter

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -6,6 +6,8 @@
 require 'active_record/connection_adapters/abstract/schema_dumper'
 require 'active_record/connection_adapters/abstract/schema_creation'
 require 'monitor'
+require 'arel/collectors/bind'
+require 'arel/collectors/sql_string'
 
 module ActiveRecord
   module ConnectionAdapters # :nodoc:
@@ -105,6 +107,26 @@ def initialize(connection, logger = nil, pool = nil) #:nodoc:
         @prepared_statements = false
       end
 
+      class BindCollector < Arel::Collectors::Bind
+        def compile(bvs, conn)
+          super(bvs.map { |bv| conn.quote(*bv.reverse) })
+        end
+      end
+
+      class SQLString < Arel::Collectors::SQLString
+        def compile(bvs, conn)
+          super(bvs)
+        end
+      end
+
+      def collector
+        if @prepared_statements
+          SQLString.new
+        else
+          BindCollector.new
+        end
+      end
+
       def valid_type?(type)
         true
       end

activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

@@ -198,26 +198,6 @@ def initialize(connection, logger, connection_options, config)
         end
       end
 
-      class BindCollector < Arel::Collectors::Bind
-        def compile(bvs, conn)
-          super(bvs.map { |bv| conn.quote(*bv.reverse) })
-        end
-      end
-
-      class SQLString < Arel::Collectors::SQLString
-        def compile(bvs, conn)
-          super(bvs)
-        end
-      end
-
-      def collector
-        if @prepared_statements
-          SQLString.new
-        else
-          BindCollector.new
-        end
-      end
-
       def adapter_name #:nodoc:
         self.class::ADAPTER_NAME
       end

activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb

@@ -140,26 +140,6 @@ def initialize(connection, logger, config)
         end
       end
 
-      class BindCollector < Arel::Collectors::Bind
-        def compile(bvs, conn)
-          super(bvs.map { |bv| conn.quote(*bv.reverse) })
-        end
-      end
-
-      class SQLString < Arel::Collectors::SQLString
-        def compile(bvs, conn)
-          super(bvs)
-        end
-      end
-
-      def collector
-        if @prepared_statements
-          SQLString.new
-        else
-          BindCollector.new
-        end
-      end
-
       def adapter_name #:nodoc:
         'SQLite'
       end