explain listener does not care about time, so use evented listener

activerecord/lib/active_record/explain_subscriber.rb

@@ -2,9 +2,12 @@
 
 module ActiveRecord
   class ExplainSubscriber # :nodoc:
-    def call(*args)
+    def start(name, id, payload)
+      # unused
+    end
+
+    def finish(name, id, payload)
       if queries = Thread.current[:available_queries_for_explain]
-        payload = args.last
         queries << payload.values_at(:sql, :binds) unless ignore_payload?(payload)
       end
     end

activerecord/test/cases/explain_subscriber_test.rb

@@ -6,14 +6,14 @@ class ExplainSubscriberTest < ActiveRecord::TestCase
 
     def test_collects_nothing_if_available_queries_for_explain_is_nil
       with_queries(nil) do
-        SUBSCRIBER.call
+        SUBSCRIBER.finish(nil, nil, {})
         assert_nil Thread.current[:available_queries_for_explain]
       end
     end
 
     def test_collects_nothing_if_the_payload_has_an_exception
       with_queries([]) do |queries|
-        SUBSCRIBER.call(:exception => Exception.new)
+        SUBSCRIBER.finish(nil, nil, :exception => Exception.new)
         assert queries.empty?
       end
     end
@@ -21,7 +21,7 @@ def test_collects_nothing_if_the_payload_has_an_exception
     def test_collects_nothing_for_ignored_payloads
       with_queries([]) do |queries|
         ActiveRecord::ExplainSubscriber::IGNORED_PAYLOADS.each do |ip|
-          SUBSCRIBER.call(:name => ip)
+          SUBSCRIBER.finish(nil, nil, :name => ip)
         end
         assert queries.empty?
       end
@@ -31,7 +31,7 @@ def test_collects_pairs_of_queries_and_binds
       sql   = 'select 1 from users'
       binds = [1, 2]
       with_queries([]) do |queries|
-        SUBSCRIBER.call(:name => 'SQL', :sql => sql, :binds => binds)
+        SUBSCRIBER.finish(nil, nil, :name => 'SQL', :sql => sql, :binds => binds)
         assert_equal 1, queries.size
         assert_equal sql, queries[0][0]
         assert_equal binds, queries[0][1]
@@ -45,4 +45,4 @@ def with_queries(queries)
       Thread.current[:available_queries_for_explain] = nil
     end
   end
-end
\ No newline at end of file
+end