/ Ruby on Rails
/
method

explain

rails latest stable - Class: ActiveRecord::ConnectionAdapters::Mysql2Adapter

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v4.2.9) is shown here.

explain(arel, binds = [])
public

No documentation available.

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 111
      def explain(arel, binds = [])
        sql     = "EXPLAIN #{to_sql(arel, binds.dup)}"
        start   = Time.now
        result  = exec_query(sql, 'EXPLAIN', binds)
        elapsed = Time.now - start

        ExplainPrettyPrinter.new.pp(result, elapsed)
      end