Simon Riggs wrote:
Right now we've got a variety of index types that are *not* flourishing (hash, bitmap, grouped).
Hash indexam has been in core for ages, and yet no-one has bothered to implement WAL logging. If I've understood correctly, it has been now been revamped in 8.4 so that there's a performance use case to use it. I wouldn't be surprised if someone (GSoC?) implements WAL logging for it for 8.5.
Bitmap indexes required significant changes to the rest of the system, the indexam API in particular.
By "grouped", I presume you mean my grouped index tuples patch, aka clustered indexes. That too required changes to the indexam API, and even if it didn't, I can guarantee that I wouldn't spend any more time on it than I do now (= 0) if it was on pgfoundry.
If we allow them to develop as separate projects, then whenever they are ready they can be used with particular releases.
Developing a new indexam is not something you do over the weekend. It's a long way from design to an implementation robust enough that anyone cares about crash recovery. Short-circuiting the release cycle with a plugin won't get you a production-ready indexam much sooner.
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