Document that char() ignores spaces in non-pattern comparisons, not in

pattern comparisons such as LIKE and regex.

diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index b8f6e238f0b547e3cbebd5569a8a3ccd58024140..22d4c4e33a983e2b62335321b63c7c7863cff906 100644 (file)
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -1014,11 +1014,13 @@ SELECT '52093.89'::money::numeric::float8;
     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,
+    disregarded when non-pattern 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.
+    character varying and text values, and
+    when using pattern matching comparisons, e.g. LIKE,
+    regular expressions.