On 11/13/24 16:34, Richard Guo wrote:
> The function get_param_path_clause_serials() is used to get the set of
> pushed-down clauses enforced within a parameterized Path. Since we
> don't currently support parameterized MergeAppend paths, and it
> doesn't look like that is going to change anytime soon (as explained
> in the comments for generate_orderedappend_paths), we don't need to
> consider MergeAppendPath in this function. Is it worth removing the
> related code, as attached?
>
> This change won't make any measurable difference in performance; it's
> just for clarity's sake.
I've passed through the logic of
get_param_path_clause_serials/reparameterize_path_by_child/reparameterize_path.
Agree, it seems not useful to parameterise ordered appends in the near
future. Even So, it would be better to insert changes, induced by new
feature by one commit.
By the way, Do you know if anyone gave a speech on the current state of
internal plan parameterisation and its possible development directions?
It would be helpful to have such an explanation.
--
regards, Andrei Lepikhov
