扫描限制 meaning in Chinese

scanning limit

Limited partition scan is a method that allows db2 to limit the scan of data in a partitioned table space
限定分区扫描允许db2将数据扫描限制在一个分区表空间中。
Db2 can determine , from the values in the sql predicate , the lowest and highest partition that can possibly contain the table rows that are requested by the sql statement , and then limits the data scan to that range of partitions
根据sql谓词中的值， db2可以判断可能包含sql语句所请求的表行的最低分区和最高分区，然后将数据扫描限制在这一范围内的分区中。