What is a forward index?
A forward index is an index that stores the values of a specific field (attribute) in a document and is used for filtering, counting, sorting, or scoring. The forward index is also known as an attribute index or a profile index. The word "forward" in the forward index refers to the process of converting documents to field information in the documents.
Attribute types of forward indexes
OpenSearch Vector Search Edition supports the following attribute types.
Attribute type | Description | Single-value | Multivalue |
INT8 | Stores 8-bit signed integers. | id=-27 | id=-27]26]33 |
UINT8 | Stores 8-bit unsigned integers. | id=56 | id=27]222]32 |
INT16 | Stores 16-bit signed integers. | id=-2724 | id=-1217^]236 |
UINT16 | Stores 16-bit unsigned integers. | id=65531 | id=-65531]22236]0^]1 |
INTEGER | Stores 32-bit signed integers. | id=-655312 | id=-2714442]2344126]33441 |
UINT32 | Stores 32-bit unsigned integers. | id=65537 | id=4011341512]26]33 |
INT64 | Stores 64-bit signed integers. | id=-551533527 | id=-2416664447]236]133 |
UINT64 | Stores 64-bit unsigned integers. | id=23545114533527 | id=12416664447]121436]2 |
FLOAT | Stores single-precision 32-bit floating-point numbers. | id=3.14 | id=3.25]3.50]3.75 |
DOUBLE | Stores double-precision 64-bit floating-point numbers. | id=3.1415926 | id=-3.1415926]26.1444]55.1441 |
STRING | Stores strings. | id=abc | id=abc]def]dgg^]dd |