exec_stmt_and_free

# File activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb, line 158
          def exec_stmt_and_free(sql, name, binds, cache_stmt: false)
            if preventing_writes? && write_query?(sql)
              raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}"
            end

            materialize_transactions

            # 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

            type_casted_binds = type_casted_binds(binds)

            log(sql, name, binds, type_casted_binds) do
              if cache_stmt
                stmt = @statements[sql] ||= @connection.prepare(sql)
              else
                stmt = @connection.prepare(sql)
              end

              begin
                result = ActiveSupport::Dependencies.interlock.permit_concurrent_loads do
                  stmt.execute(*type_casted_binds)
                end
              rescue Mysql2::Error => e
                if cache_stmt
                  @statements.delete(sql)
                else
                  stmt.close
                end
                raise e
              end

              ret = yield stmt, result
              result.free if result
              stmt.close unless cache_stmt
              ret
            end
          end