-hackers,
We have had ALTER SYSTEM for some time now. It is awesome to be able to
make changes that can be system wide without ever having to hit a shell
but it does lack a feature that seems like an oversight, the ability to
comment.
Problem we are trying to solve:
Having documentation for changes to GUC parameters that are modified via
ALTER SYSTEM.
Why?
Because documentation is good and required for a proper production system.
How?
I propose:
Add a column to pg_settings comment(text)
Change the grammar to allow:
ALTER SYSTEM SET configuration_parameter { TO | = } { value | 'value' |
DEFAULT } COMMENT 'comment'
Example:
ALTER SYSTEM SET maintenance_work_mem TO '1GB' COMMENT IS 'Increased to
allow autovacuum to be more efficient';
Potential issues:
Does not use existing comment functionality. Alternate solution which
would decrease functionality is:
COMMENT ON SETTING setting IS 'comment';
Looking forward, we may want to do the following:
1. Make it so any object can have a comment with creation, e.g;
CREATE TABLE table () COMMENT IS '';
2. Make it so comments are appended not replaced.
Thanks in advance,
JD
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