DB2 doesn't provide direct equivalents to these operations, but the most common USES of FORALL and BULK COLLECT can be efficiently mapped to statements involving UNNEST and ARRAY_AGG, respectively.
DB 2不提供这些操作的直接等效操作，但是FORALL和BULK COLLECT的最常见使用可有效地分别映射到涉及UNNEST和ARRAY_AGG的语句。
2
A method to predict block conflicts in directmapped caches is proposed, which is based on the block replacement behavior.