Compare if found key (in row) is over max-value. @param range range to compare to row. May be 0 for no range @seealso key.cc::key_cmp() @return The return value is SIGN(key_in_row - range_key): - 0 : Key is equal to range or 'range' == 0 (no range) - -1 : Key is less than range - 1 : Key is larger than range */
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