On Tue, Feb 26, 2019 at 06:55:30AM +0000, Tsunakawa, Takayuki wrote: > What concrete problems would you expect this patch to solve? What > kind of extensions do you imagine? I'd like to hear about the > examples. For example, "PostgreSQL 12 will not be able to filter > out enough partitions when planning/executing SELECT ... WHERE > ... statement. But an extension like this can extract just one > partition early."
Indeed. Hooks should be defined so as their use is as generic and possible depending on their context, particularly since there is a planner hook.. It is also important to consider first if the existing core code can be made better depending on the requirements, removing the need for a hook at the end. -- Michael
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