collection index
A collection index maps a sort (order) key value to an identity (LOID), which represents a database address. For each collection any number of indexes can be defined based on key definitions provided for the structure of instances in the collection.
Special collection indexes are __IDENTITY indices, where only the LOID is stored in the index without any key value.
Generalisations: dictionary collection
References
Referenced in
Related topics
- SDB_Extend - Object space extents
- Index definition
- Enable multiple index feature
- ddeindx - Order keys
- smceiksm - Identifying key for structure
- Order keys
- Index options
- unique - UNIQUE option
- supressEmpty - NOT_EMPTY option
- temporary - TEMPORARY option
- Order keys attribute
- NOT_EMPTY option
- SDB_Index - Index definition