The density configuration for the index.
| Enums | |
|---|---|
| DENSITY_UNSPECIFIED | Unspecified. It will use database default setting. This value is input only. | 
| SPARSE_ALL | In order for an index entry to be added, the document must contain all fields specified in the index. This is the only allowed value for indexes having ApiScope  | 
| SPARSE_ANY | In order for an index entry to be added, the document must contain at least one of the fields specified in the index. Non-existent fields are treated as having a NULL value when generating index entries. | 
| DENSE | An index entry will be added regardless of whether the document contains any of the fields specified in the index. Non-existent fields are treated as having a NULL value when generating index entries. |