Announcing the latest Beta release of pgbitmap, available from [pgxn](https://pgxn.org/dist/pgbitmap/) and [github](https://github.com/marcmunro/pgbitmap). pgbitmap provides a bitmap datatype for Postgres with a full set of functions, operators and aggregates.
This release fixes a number of issues with empty bitmaps and is considered a production release candidate. Any and all feedback is welcomed. A bitmap is an array of bits, indexed by an integer. Bitmaps provide an efficient means to implement sets of integers. pgbitmap provides functions and operators for: - creating new bitmaps; - adding elements to bitmaps; - removing elements from bitmaps; - testing for inclusion of elements in bitmaps; - finding the minimum and maximum bits in bitmaps; - unioning bitmaps together (set union/logical or); - intersecting bitmaps (set intersection/logical and); - subtracting one bitmap from another; - converting bitmaps to and from textual representations; - converting bitmaps to and from arrays; - aggregating bits and bitmaps into bitmaps. It differs from the standard Postgres bitstring in that it isn't based around bit zero (bitmap(1000000) does not contain 1,000,000 zeroes followed by a 1) and it has more functionality. It was developed primarily in order to efficiently manage sets of privileges for Virtual Private Database implementations. Full documentation is available [here](https://marcmunro.github.io/pgbitmap/docs/html/index.html)
