Re: Shouldn't "WHEN (OLD.* IS DISTINCT FROM NEW.*)" clause be independent from data type?

Why the point (and geometric operators in general) use "=~" - w/ meaning "same as?" - instead of (as opposed to in addition to) a regular "=" - w/ meaning "equals?" - I cannot say but because of this when IS DISTINCT tries to locate a operator/function to use for its equality comparison it fails.  The main problem seems to be indexing and secondarily the added confusion that introducing a new operator would cause.

It should be possible to define a new operator, "=(point, point)" with the appropriate settings to make this work in your specific case.  Such a setup ideally would be on the Wiki (and maybe one is...haven't looked) for others to references.  A PGXN extension would also be a good choice for distribution.  It doesn't seem easy or important enough to add to core.

David J.