instance method `explain`

Ruby on Rails 7.0.10

Since v6.1.7.10

Available in: v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

explain(arel, binds = [])

No documentation comment.

Parameters

arel req
binds opt = []

Source

# File activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb, line 33
        def explain(arel, binds = [])
          sql     = "EXPLAIN #{to_sql(arel, binds)}"
          start   = Process.clock_gettime(Process::CLOCK_MONOTONIC)
          result  = exec_query(sql, "EXPLAIN", binds)
          elapsed = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start

          MySQL::ExplainPrettyPrinter.new.pp(result, elapsed)
        end

Defined in activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb line 33 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::ConnectionAdapters::MySQL::DatabaseStatements

Signature

Parameters