ActiveRecord::ConnectionAdapters::MySQL::DatabaseStatements

# File activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb, line 75
        def exec_delete(sql, name = nil, binds = [])
          if without_prepared_statement?(binds)
            @lock.synchronize do
              execute_and_free(sql, name) { @connection.affected_rows }
            end
          else
            exec_stmt_and_free(sql, name, binds) { |stmt| stmt.affected_rows }
          end
        end

# File activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb, line 55
        def exec_query(sql, name = "SQL", binds = [], prepare: false)
          if without_prepared_statement?(binds)
            execute_and_free(sql, name) do |result|
              if result
                build_result(columns: result.fields, rows: result.to_a)
              else
                build_result(columns: [], rows: [])
              end
            end
          else
            exec_stmt_and_free(sql, name, binds, cache_stmt: prepare) do |_, result|
              if result
                build_result(columns: result.fields, rows: result.to_a)
              else
                build_result(columns: [], rows: [])
              end
            end
          end
        end

# File activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb, line 43
        def execute(sql, name = nil)
          if preventing_writes? && write_query?(sql)
            raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}"
          end

          # make sure we carry over any changes to ActiveRecord::Base.default_timezone that have been
          # made since we established the connection
          @connection.query_options[:database_timezone] = ActiveRecord::Base.default_timezone

          super
        end

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

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