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Diffstat (limited to 'doc/src/sgml/charset.sgml')
| -rw-r--r-- | doc/src/sgml/charset.sgml | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/doc/src/sgml/charset.sgml b/doc/src/sgml/charset.sgml index 057a6bb81a5..20cdfabd7bf 100644 --- a/doc/src/sgml/charset.sgml +++ b/doc/src/sgml/charset.sgml @@ -928,10 +928,11 @@ CREATE COLLATION ignore_accents (provider = icu, locale = 'und-u-ks-level1-kc-tr nondeterministic collations give a more <quote>correct</quote> behavior, especially when considering the full power of Unicode and its many special cases, they also have some drawbacks. Foremost, their use leads - to a performance penalty. Also, certain operations are not possible with - nondeterministic collations, such as pattern matching operations. - Therefore, they should be used only in cases where they are specifically - wanted. + to a performance penalty. Note, in particular, that B-tree cannot use + deduplication with indexes that use a nondeterministic collation. Also, + certain operations are not possible with nondeterministic collations, + such as pattern matching operations. Therefore, they should be used + only in cases where they are specifically wanted. </para> </sect3> </sect2> |