"Alexander Kirpa" <postgres@bilteks.com> writes:
> select '['||a||']' as aa,'['||b||']' as bb from test1;
> aa | bb
> ----------+----------
> [ok] | [ok]
> [ bad] | [ bad ]
> [ poor] | [ poor]
> (3 rows)
> It is easy to see that char(x) field really blank stripped.
> This is bug of server or documentation?
From the documentation:
> Values of type character are physically padded with spaces to the specified
> width n, and are stored and displayed that way. However, the padding spaces
> are treated as semantically insignificant. Trailing spaces are disregarded
> when comparing two values of type character, and they will be removed when
> converting a character value to one of the other string types. Note that
> trailing spaces are semantically significant in character varying and text
> values.
Concatenation is an example of an operation where the padding spaces are
treated as semantically insignificant, so they get removed before the
concatenation.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com