On Thu, Dec 14, 2017 at 12:23 PM, Tomas Vondra <tomas.von...@2ndquadrant.com> wrote: > Can you give an example of such algorithm? Because I haven't seen such > example, and I find arguments based on hypothetical compression methods > somewhat suspicious. > > FWIW I'm not against considering such compression methods, but OTOH it > may not be such a great primary use case to drive the overall design.
Well it isn't, really. I am honestly not sure what we're arguing about at this point. I think you've agreed that (1) opening avenues for extensibility is useful, (2) substitution a general-purpose compression algorithm could be useful, and (3) having datatype compression that is enabled through TOAST rather than built into the datatype might sometimes be desirable. That's more than adequate justification for this proposal, whether half-general compression methods exist or not. I am prepared to concede that there may be no useful examples of such a thing. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
