Add support for collation attributes on older ICU versions
Starting in ICU 54, collation customization attributes can be
specified in the locale string, for example
"@colStrength=primary;colCaseLevel=yes". Add support for this for
older ICU versions as well, by adding some minimal parsing of the
attributes in the locale string and calling ucol_setAttribute() on
them. This is essentially what never ICU versions do internally in
ucol_open(). This was we can offer this functionality in a consistent
way in all ICU versions supported by PostgreSQL.
Also add some tests for ICU collation customization.
Reported-by: Daniel Verite <daniel@manitou-mail.org>
Discussion: https://www.postgresql.org/message-id/0270ebd4-f67c-8774-1a5a-91adfb9bb41f@2ndquadrant.com
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/b8f9a2a69a279d118e366a0d3d45caa84a7620b1
Modified Files
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src/backend/utils/adt/pg_locale.c | 104 +++++++++++++++++++++++++
src/test/regress/expected/collate.icu.utf8.out | 39 ++++++++++
src/test/regress/sql/collate.icu.utf8.sql | 21 +++++
3 files changed, 164 insertions(+)
