executor: fix load data deal with escape character. (#16340) #16633
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cherry-pick #16340 to release-3.0
What problem does this PR solve?
According to mysql document, the escaped character is interpreted as if it was not escaped. For example, \x is just x. When TiDB load data interpreting escaped, it ignore following character, just deal with character like
\t.What is changed and how it works?
If the escaped character is interpreted as if it was not escaped, output the original character. For example:
9002 tab\ tabwill be interpreted as:
9002 tab tabRelated changes
Check List
Tests
Side effects
Release note