Main test#1831
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Vlasdislav wants to merge 5 commits into
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We inherited this issue from PostgreSQL. PostgreSQL uses glibc to sort strings. In version glibc=2.28, collations broke down badly (in general, there are no guarantees when updating glibc). Changing collations breaks indexes. Similarly, a cluster with different collations also behaves unpredictably. What and when something has changed in glibc can be found on https://github.com/ardentperf/glibc-unicode-sorting Also there is special postgresql-wiki https://wiki.postgresql.org/wiki/Locale_data_changes And you tube video https://www.youtube.com/watch?v=0E6O-V8Jato In short, the issue can be seen through the use of bash: ( echo "1-1"; echo "11" ) | LC_COLLATE=en_US.UTF-8 sort gives the different results in ubunru 18.04 and 22.04. There is no way to solve the problem other than by not changing the symbol order. We freeze symbol order and use it instead of glibc. Here the solution https://github.com/postgredients/mdb-locales. In this PR I have added PostgreSQL patch that replaces all glibc locale-related calls with a calls to an external libary. It activates using new configure parameter --with-mdblocales, which is off by default. Using custom locales needs libmdblocales1 package and mdb-locales package with symbol table. Build needs libmdblocales-dev package with headers.
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Fixes #ISSUE_Number
What does this PR do?
Type of Change
Breaking Changes
Test Plan
make installcheckmake -C src/test installcheck-cbdb-parallelImpact
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