SQL query does not work when executing from Rails console

Question

I am trying to run the following line in my Rails console:

ActiveRecord::Base.connection.execute "DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498;"

It is simply deleting an old record and rewriting another record for merging purposes.

Rails console returns the following:

DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498; ActiveRecord::StatementInvalid: Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=40000005' at line 1: DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498; from /Users/huynguyen/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:243:in DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498; ActiveRecord::StatementInvalid: Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=40000005' at line 1: DELETE FROM recommendations WHERE place_id=4000000001267 AND recommender_id=2728498;UPDATE IGNORE recommendations SET place_id=4000000001267 WHERE place_id=4000000564630 AND recommender_id=2728498; from /Users/huynguyen/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:243:in query'`

However, when I run this exact query in Sequel Pro, the query runs perfectly fine. Any idea what is going on?

Answer 1

Might it be connected to the fact AR's mysql adapter doesn't have multiple query execution on by default?

A quick fix for this would be splitting the query into two distinct and execute them one after another. And wrapping them into a transaction, of course :)