add a bind collector, remove the bind visitor

activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

@@ -10,9 +10,7 @@ def initialize
       def to_sql(arel, binds = [])
         if arel.respond_to?(:ast)
           binds = binds.dup
-          visitor.compile(arel.ast) do
-            quote(*binds.shift.reverse)
-          end
+          visitor.accept(arel.ast, collector).compile binds.dup
         else
           arel
         end

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -130,16 +130,11 @@ def expire
         @owner = nil
       end
 
-      def unprepared_visitor
-        self.class::BindSubstitution.new self
-      end
-
       def unprepared_statement
         old_prepared_statements, @prepared_statements = @prepared_statements, false
-        old_visitor, @visitor = @visitor, unprepared_visitor
         yield
       ensure
-        @visitor, @prepared_statements = old_visitor, old_prepared_statements
+        @prepared_statements = old_prepared_statements
       end
 
       # Returns the human-readable name of the adapter. Use mixed case - one

activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb

@@ -123,10 +123,6 @@ def dealloc(stmt)
         end
       end
 
-      class BindSubstitution < Arel::Visitors::SQLite # :nodoc:
-        include Arel::Visitors::BindVisitor
-      end
-
       def initialize(connection, logger, config)
         super(connection, logger)
 
@@ -135,11 +131,31 @@ def initialize(connection, logger, config)
                                         self.class.type_cast_config_to_integer(config.fetch(:statement_limit) { 1000 }))
         @config = config
 
+        @visitor = Arel::Visitors::SQLite.new self
+
         if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true })
           @prepared_statements = true
-          @visitor = Arel::Visitors::SQLite.new self
         else
-          @visitor = unprepared_visitor
+          @prepared_statements = false
+        end
+      end
+
+      class BindCollector < Arel::Collectors::Bind
+        def initialize(conn)
+          @conn = conn
+          super()
+        end
+
+        def compile(bvs)
+          super(bvs.map { |bv| @conn.quote(*bv.reverse) })
+        end
+      end
+
+      def collector
+        if @prepared_statements
+          Arel::Collectors::SQLString.new
+        else
+          BindCollector.new self
         end
       end