From 52b6cbcb9df7e2c968da3e9a9779500cacfac465 Mon Sep 17 00:00:00 2001
From: Stan Hu <stanhu@gmail.com>
Date: Mon, 20 Nov 2017 09:18:15 -0800
Subject: Add QUERY_RECORDER_DEBUG environment variable to improve performance
 debugging

---
 spec/support/query_recorder.rb | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'spec')

diff --git a/spec/support/query_recorder.rb b/spec/support/query_recorder.rb
index ba0b805caad..cd67b517ea0 100644
--- a/spec/support/query_recorder.rb
+++ b/spec/support/query_recorder.rb
@@ -8,7 +8,14 @@ module ActiveRecord
       ActiveSupport::Notifications.subscribed(method(:callback), 'sql.active_record', &block)
     end
 
+    def show_backtrace(values)
+      Rails.logger.debug("QueryRecorder SQL: #{values[:sql]}")
+      caller.each { |line| Rails.logger.debug("   --> #{line}") }
+    end
+
     def callback(name, start, finish, message_id, values)
+      show_backtrace(values) if ENV['QUERY_RECORDER_DEBUG']
+
       if values[:name]&.include?("CACHE")
         @cached << values[:sql]
       elsif !values[:name]&.include?("SCHEMA")
-- 
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