Re: zero char is returned as space

Konstantin Izmailov <pgfizm@gmail.com> writes:
> could you help me understand if this is an intended behaviour, or I'm
> incorrectly querying a "char" field?

We do not support '\0' as an element of a string value.  You didn't
show how you're trying to insert this value, but I suspect that
Postgres saw it as an empty string which it then space-padded to
length 1 because that's what char(1) does.

Don't use a string field to store an integer.  What with the need
for a length header, you wouldn't be saving any space compared to
"smallint" even if there weren't any semantic issues.

            regards, tom lane