We are not so pleased with the DPSI if we must probe multiple index trees to find rows across multiple partitions.

我们不是很乐意使用DPSI，但是我们必须跨多个分区探测多个索引树来寻找行。

youdao

For each author ID, an index is then used to probe whether that ID occurs in the other table.

对于每个author ID，使用索引来检查该ID是否在另一个表中出现。

youdao

Since Query 1 expresses the join predicate on the books table, DB2 9.1 and 9.5 perform a table scan on authors and then use the index AUTHORIDX1 to probe into the books table.

由于查询1表达了books表中的连接谓词，所以DB 2 9.1和9.5执行一个扫描authors的表，然后使用索引authoridx 1查找books表。

youdao