diff options
| -rw-r--r-- | doc/src/sgml/datatype.sgml | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml index 4d883ecb8b1..b5191f45369 100644 --- a/doc/src/sgml/datatype.sgml +++ b/doc/src/sgml/datatype.sgml @@ -1100,14 +1100,15 @@ SELECT '52093.89'::money::numeric::float8; stored and displayed that way. However, trailing spaces are treated as semantically insignificant and disregarded when comparing two values of type <type>character</type>. In collations where whitespace - is significant, this behavior can produce unexpected results, - e.g. <command>SELECT 'a '::CHAR(2) collate "C" < - 'a\n'::CHAR(2)</command> returns true. + is significant, this behavior can produce unexpected results; + for example <command>SELECT 'a '::CHAR(2) collate "C" < + E'a\n'::CHAR(2)</command> returns true, even though <literal>C</> + locale would consider a space to be greater than a newline. Trailing spaces are removed when converting a <type>character</type> value to one of the other string types. Note that trailing spaces <emphasis>are</> semantically significant in <type>character varying</type> and <type>text</type> values, and - when using pattern matching, e.g. <literal>LIKE</>, + when using pattern matching, that is <literal>LIKE</> and regular expressions. </para> |