Stephen Frost <[email protected]> writes:
> Seems like this would be a bit better:
> ------
> All the actions, when acting on a single table and not using the ALL IN
> TABLESPACE form, except RENAME and SET SCHEMA, can be combined into a
> list of multiple alterations to be applied.
> ------
> I note that we say 'in parallel', but given that we have actual parallel
> operations now, we should probably shy away from using that except in
> cases where we actually mean operations utilizing multiple parallel
> processes.
I follow your beef with use of the word "parallel", but your proposed
rewording loses the entire point of multiple actions per ALTER TABLE;
namely that they're accomplished without repeated scans of the table.
Also the above seems a bit clunky; doesn't ALL IN TABLESPACE fall outside
the restriction "acting on a single table"?
So maybe something like
All the forms of ALTER TABLE that act on a single table,
except RENAME and SET SCHEMA, can be combined into a
list of multiple alterations to be applied together.
We would have to enlarge on what "together" means, but I think there may
already be text explaining that further down.
regards, tom lane
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