Ruben Q L created CALCITE-4195:
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Summary: Cast from character to character with a different
collator is not monotonic
Key: CALCITE-4195
URL: https://issues.apache.org/jira/browse/CALCITE-4195
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.24.0
Reporter: Ruben Q L
Fix For: 1.26.0
Problem related to the feature CALCITE-3951.
A cast operation from a character type to another character type that has a
different collator must be evaluated as not monotonic. Currently this is not
the case.
This has an impact e.g. in SortProjectTransposeRule, since we can incorrectly
transpose a sort after a projection than contains such a cast, and we end up
with a plan that will return a different result than the original one.
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