IsDuplicatedColumnError check if given `err` is MySQL duplicated column name error.

IsDuplicatedEntryError check if given `err` is MySQL duplicated entry error.

IsTableNotExistError check if given `err` is MySQL table not exist error.

IsUnknownColumnError check if given `err` is MySQL unknown column error.

IsUnknownTableError check if given `err` is MySQL unknown table error.