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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