这类索引有助于改善针对空间数据的查询的性能。
Such indexes help to improve the performance of queries on spatial data.
如果您熟悉空间数据和网格索引，那么结果就无需解释了。
If you are familiar with spatial data and the grid index, the results are pretty much self-explanatory.
由于涉及到空间数据，您需要为这个索引指定r - Tree访问方法。
Since the data is spatial, you need to specify the R-Tree access method for this index.
应用推荐