Re: pg_table_size errors "invalid name syntax" for table names containing spaces

Ahh okay, thank you both for the clarification!

On Thu, Jun 10, 2021 at 8:43 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> "David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> writes:
> > On Thursday, June 10, 2021, Michel Helms <michel(at)togetherdb(dot)com> wrote:
> >> CREATE TABLE "wei rd" (id SERIAL);
> >> SELECT pg_table_size('wei rd');
>
> > You still have to double-quote the name even if its being passed around
> in
> > a string literal.
>
> Yeah. The reason for this is that you're also allowed to write qualified
> table names:
>
> SELECT pg_table_size('myschema.mytable');
>
> That would seem to introduce an ambiguity: is the dot a schema separator,
> or just an ordinary character (in a table name that was presumably written
> with double quotes originally)? We resolve this by saying that the
> parsing rules for regclass_in are the same as they are in SQL text,
> so you have to double-quote anything that is not a plain identifier
> or needs to be protected against case-folding.
>
> Hence, you should write
>
> SELECT pg_table_size('"wei rd"');
>
> regards, tom lane
>