On Fri, Jul 26, 2013 at 6:28 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:

> <snip>
>
> I think we could do with both more documentation, and better error
> messages for these cases.  In the SET-where-you-should-use-ADD case,
> perhaps
>
> ERROR:  option "use_remote_estimate" has not been set
> HINT: Use ADD not SET to define an option that wasn't already set.
>
> In the ADD-where-you-should-use-SET case, perhaps
>
> ERROR:  option "use_remote_estimate" is already set
> HINT: Use SET not ADD to change an option's value.
>
> <snip>
>
> Thoughts, better wordings?
>

Since SET is more or less a keyword in this context and there's already not
some obvious things about it, it might be better to avoid using it with a
slightly different meaning in the error messages. Maybe "defined" would be
clearer? That would be consistent with your usage of "define" in the first
error message as well.

ERROR:  option "use_remote_estimate" has not been defined
HINT: Use ADD not SET to define an option that wasn't already defined.

ERROR:  option "use_remote_estimate" is already defined
HINT: Use SET not ADD to change an option's value.

Just a thought.

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