OceanBase Database supports the RoaringBitmap data type, which is a highly efficient compressed bitmap data type. You can store and process a set of unsigned integers (non-negative integers) by using this data type.
A bitmap is a technique for efficiently processing large amounts of data. It has the following advantages:
- High space efficiency. A bitmap uses one bit to represent the presence of an element, significantly reducing the storage space required. This structure is commonly used in scenarios that involve processing large volumes of data, such as data statistics, deduplication, and analysis.
- Simple and fast operations. For example, checking whether an element exists, adding an element, or deleting an element can be done with simple bit operations. Bitwise operations such as XOR, intersection, and union on bitmaps can efficiently implement business data queries and analysis.
Compared with traditional bitmaps, the RoaringBitmap data type is better suited for storing very sparse bit arrays. In some cases, it can be hundreds of times faster than other bitmaps and provides significantly better compression. Additionally, the RoaringBitmap data type supports 64-bit integer data.
In addition to providing the RoaringBitmap data type, OceanBase Database also provides functions for working with bitmap data. For more information, see Functions for the RoaringBitmap data type.