Secondary-access methods

A secondary-access method, often called an index, is a set of user-defined functions that build, access, and manipulate an index structure. These functions encapsulate index operations, such as how to scan, insert, delete, or update nodes in an index. A secondary-access method describes how to access the data in an index that is built on a column (column index) or on a user-defined function (functional index). Typically, a secondary-access method speeds up the retrieval of a type of data.

DataBlade® modules can provide additional secondary-access methods for use with UDTs. For more information about secondary-access methods of DataBlade modules, refer to the user guide for each DataBlade module. For more information about R-trees, refer to the R-Tree Index User's Guide.