Re: Less than ideal error reporting in pg_stat_statements

On Tue, Sep 22, 2015 at 3:16 PM, Jim Nasby <Jim.Nasby@bluetreble.com> wrote:
> At first I thought the lack of context indicated a palloc had failed during
> ereport() (since we apparently just toss the previous error when that
> happens), but it turns out there's some error reporting in
> pg_stat_statements that's less than ideal. Attached patch fixes, though I'm
> not sure if %lld is portable or not.

+ ereport(LOG,
+              (errcode(ERRCODE_OUT_OF_MEMORY),
+               errmsg("out of memory attempting to pg_stat_statement file"),
+               errdetail("file \"%s\": size %lld", PGSS_TEXT_FILE,
stat.st_size)));

Uh, what?

I'm not opposed to this basic idea, but I think the message should be
reworded, and that the presence of two separate ereport() call sites
like the above is totally unnecessary. The existing MaxAllocSize check
is just defensive; no user-visible distinction needs to be made.

-- 
Peter Geoghegan