executor: throw error when prepared statement is execute, deallocate or prepare (#21962) #21972
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cherry-pick #21962 to release-4.0
What problem does this PR solve?
Issue Number: close #17412
Problem Summary:
TiDB regards sql like
prepare stmt1 from "execute stmt"
as valid.What is changed and how it works?
What's Changed:
When prepared statement is execute, deallocate or prepare, throw error
ERROR 1295 (HY000): This command is not supported in the prepared statement protocol yet
.Related changes
Check List
Tests
Release note