Details
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New Feature
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Resolution: Unresolved
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Minor - P4
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None
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None
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None
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Query Optimization
Description
$toUpper / $toLower currently only have defined behavior for ASCII characters. Users should be able to perform case folding / case mapping for all Unicode code points, according to locale-specific rules. It looks like ICU has support for this: http://userguide.icu-project.org/transforms/casemappings.