.ircrb entry to run explain on a query.

explain.rb

if defined? ActiveRecord
  def explain(query)
    query = query.to_sql if query.is_a?(ActiveRecord::Relation)

    ActiveRecord::Base.connection
      .execute("EXPLAIN ANALYZE #{query}") 
      .to_a
      .each { |hash| puts hash["QUERY PLAN"] }

    nil
  end
end