This feature supports B-tree indexes and functional indexes.
该特性支持B -树索引和功能性索引。
A FOT index is an index that is similar to a B-Tree index, but an FOT index has multiple root nodes and fewer levels. (B-Tree indexes have only one root node and more levels.)
FOT索引类似B - Tree索引,但它有多个根节点和较少的级(B - Tree索引只有一个根节点和更多的级)。
The result is much flatter B+tree indexes.
结果是相对较为浅的索引。
The B-Tree Scanner improves transaction processing for logged databases when rows are deleted from a table with indexes.
从有索引的表中删除行时,B - TreeScanner有助于改进启用了日志的数据库的事务处理。
Index options like UNIQUE and CLUSTER, and access methods like B-Tree, R-Tree and user-defined access methods can apply to both functional and non-functional indexes.
诸如unique和CLUSTER等索引选项,以及B - Tree、r - Tree等访问方法和用户定义的访问方法,可以同时应用于函数索引和非函数索引。
Index options like UNIQUE and CLUSTER, and access methods like B-Tree, R-Tree and user-defined access methods can apply to both functional and non-functional indexes.
诸如unique和CLUSTER等索引选项,以及B - Tree、r - Tree等访问方法和用户定义的访问方法,可以同时应用于函数索引和非函数索引。
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