Tom Lane wrote:
UTF8 has disjoint representations for
first-bytes and not-first-bytes of MB characters, and thus it is
impossible to make a false match in which an MB pattern character is
matched to the end of one data character plus the start of another.
In character sets without that property, we have to use the slow way to
ensure we don't make out-of-sync matches.


Thanks. I will include this info in the comments.



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