postgres.git / summary / log / commit / refs
commit d2ca16bb509c453eac181c1ef805ff55289df779
Author: Jeff Davis <jdavis@postgresql.org>
Date: Sat Jan 25 08:12:30 2025 +0000
Fix PDF doc build.
Reported-by: Tom Lane
Discussion: https://postgr.es/m/608525.1737781222@sss.pgh.pa.us
doc/src/sgml/func.sgml | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index d2b0b059e65..7efc81936ab 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -3120,19 +3120,15 @@ SELECT NOT(ROW(table.*) IS NOT NULL) FROM TABLE; -- detect at least one null in
<para>
Performs case folding of the input string according to the collation.
Case folding is similar to case conversion, but the purpose of case
- folding is to facilitate case-insensitive comparison of strings,
+ folding is to facilitate case-insensitive matching of strings,
whereas the purpose of case conversion is to convert to a particular
cased form. This function can only be used when the server encoding
is <literal>UTF8</literal>.
</para>
<para>
- Ordinarily, case folding simply converts to lowercase, but there are a
- few notable exceptions depending on the collation. For instance, the
- character <literal>Σ</literal> (U+03A3) has two lowercase forms:
- <literal>σ</literal> (U+03C3) and <literal>ς</literal> (U+03C2); case
- folding in the <literal>PG_C_UTF8</literal> collation maps all three
- forms to <literal>σ</literal>. Additionally, the result is not
- necessarily lowercase; some characters may be folded to uppercase.
+ Ordinarily, case folding simply converts to lowercase, but there may
+ be exceptions depending on the collation. For instance, some
+ characters have more than two lowercase variants, or fold to uppercase.
</para>
<para>
Case folding may change the length of the string. For instance, in
[parent: 38273b5f831b]