planner: DELETE cannot delete data in some cases when the database name is capitalized (#21202)
#21206
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cherry-pick #21202 to release-4.0
What problem does this PR solve?
Issue Number: close #21200
Problem Summary:
The
CurrentDBin session vars is stored the original string representation. (i.e. if we create the database name astEsT1, theCurrentDBwould betEsT1.However, in the codes that we changed in the pr, we treat the
CurrentDBas its lower representation. This leads to wrong string comparison result. SoDELETEmight not delete the data correctly.What is changed and how it works?
Proposal: xxx
What's Changed:
Wrap
CIStrupon theCurrentDB.Related changes
Check List
Tests
Release note
DELETEmay not delete data correctly when the database name is not in pure lower representation.