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| author | Jeff Davis | 2025-01-24 22:56:22 +0000 |
|---|---|---|
| committer | Jeff Davis | 2025-01-24 22:56:22 +0000 |
| commit | bfc5992069cf00b189af83d96a83ae5ebb65e938 (patch) | |
| tree | 94332f38e12deb4a6dcfdc011c42848069190ec5 /src/test/regress/sql/collate.utf8.sql | |
| parent | f15538cd27d4eeb7d665263a3d7b5700362d7eb0 (diff) | |
Add SQL function CASEFOLD().
Useful for caseless matching. Similar to LOWER(), but avoids edge-case
problems with using LOWER() for caseless matching.
For collations that support it, CASEFOLD() handles characters with
more than two case variations or multi-character case variations. Some
characters may fold to uppercase. The results of case folding are also
more stable across Unicode versions than LOWER() or UPPER().
Discussion: https://postgr.es/m/a1886ddfcd8f60cb3e905c93009b646b4cfb74c5.camel%40j-davis.com
Reviewed-by: Ian Lawrence Barwick
Diffstat (limited to 'src/test/regress/sql/collate.utf8.sql')
| -rw-r--r-- | src/test/regress/sql/collate.utf8.sql | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/test/regress/sql/collate.utf8.sql b/src/test/regress/sql/collate.utf8.sql index 46e9c5232ad..6c7c7aec9ec 100644 --- a/src/test/regress/sql/collate.utf8.sql +++ b/src/test/regress/sql/collate.utf8.sql @@ -81,6 +81,9 @@ SELECT 'xAb' !~* '[c-d]' COLLATE PG_C_UTF8; SELECT 'Δ' ~* '[γ-λ]' COLLATE PG_C_UTF8; SELECT 'δ' ~* '[Γ-Λ]' COLLATE PG_C_UTF8; -- same as above with cases reversed +-- case folding +select casefold('AbCd 123 #$% ıiIİ ẞ ß DŽDždž Σσς' collate PG_C_UTF8); + -- -- Test PG_UNICODE_FAST -- @@ -140,3 +143,6 @@ SELECT 'xAb' ~* '[W-Y]' COLLATE PG_UNICODE_FAST; SELECT 'xAb' !~* '[c-d]' COLLATE PG_UNICODE_FAST; SELECT 'Δ' ~* '[γ-λ]' COLLATE PG_UNICODE_FAST; SELECT 'δ' ~* '[Γ-Λ]' COLLATE PG_UNICODE_FAST; -- same as above with cases reversed + +-- case folding +select casefold('AbCd 123 #$% ıiIİ ẞ ß DŽDždž Σσς' collate PG_UNICODE_FAST); |