Add is provided for backward compatibility. The recommended way to add new index definitions before creating a table is to use the AddIndexDef method. To add an index to an existing table, use the AddIndex method of the dataset instead. To change the array of indexes when a new index has been added to the dataset, use the Update method instead. 

Add creates an index definition and assigns the values passed in the Name, Fields, and Options parameters to the TIndexDef properties of the same names. If an index definition with same name already exists, Add raises an EDatabaseError exception. 

Items 

TIndexDef 

Fields 

Name 

Options 

AddIndex 

Update 

AddIndexDef