This being the case, is there ever ANY reason for someone to use it?
Well, someone might fix it up at some point in the future. I don't think there's anything fundamentally wrong with hash indexes, it is just that the current implementation is a bit lacking.
If not, then shouldn't we consider deprecating it and eventually removing it.
I would personally consider the code to be deprecated already.
I don't think there is much to be gained b removing it: the code is pretty isolated from the rest of the tree, and (IMHO) not a significant maintenance burden.
-Neil
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