expression: fix charset and collation for current_role
(#16019)
#16084
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cherry-pick #16019 to release-3.1
What problem does this PR solve?
#15250 didn't set charset and collation for
current_role
correctly, which causecurrent_role
print binary collation result.What is changed and how it works?
fix charset and collation for
current_role
Related changes
Check List
Tests
Side effects
Release note