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Module: ActiveRecord::ConnectionAdapters::MySQL::DatabaseStatements

Instance Method Summary

Instance Method Details

#build_explain_clause(options = [])

[ GitHub ] 

  


# File 'activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb', line 36



def build_explain_clause(options = [])
  return "EXPLAIN" if options.empty?

  explain_clause = "EXPLAIN #{options.join(" ").upcase}"

  if analyze_without_explain? && explain_clause.include?("ANALYZE")
    explain_clause.sub("EXPLAIN ", "")
  else
    explain_clause
  end
end


  








  

    #explain(arel, binds = [], options = [])  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb', line 27



def explain(arel, binds = [], options = [])
  sql     = build_explain_clause(options) + " " + to_sql(arel, binds)
  start   = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  result  = internal_exec_query(sql, "EXPLAIN", binds)
  elapsed = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start

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


  








  

    #high_precision_current_timestamp  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb', line 23



def high_precision_current_timestamp
  HIGH_PRECISION_CURRENT_TIMESTAMP
end