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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
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.