instance method `explain`

Ruby on Rails 4.2.9

Since v3.2.22.5 Last seen in v4.2.9

Available in: v3.2.22.5 v4.0.13 v4.1.16 v4.2.9

Compare with:

explain(arel, binds = [])

No documentation comment.

Parameters

arel req
binds opt = []

Source

# 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

Defined in activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb line 111 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::ConnectionAdapters::Mysql2Adapter

Signature

Parameters