oracle PL / SQL如何为IPv6 cidr计算范围ip> PL / SQL：ORA-00907：缺少右括号

Question

有人知道为什么不能构建上述软件包吗？

oracle PL/SQL how to calculate range ip for IPv6 cidr

https://stackoverflow.com/users/3027266/wernfried-domscheit

我收到此错误：错误（300,25）：PL / SQL：ORA-00907：缺少右括号

(SELECT pos, len, match_num
FROM ip
MATCH_RECOGNIZE (
    ORDER BY pos
    MEASURES 
        FINAL COUNT(*) AS len,
        MATCH_NUMBER() AS match_num
    ALL ROWS PER MATCH
    PATTERN(zero{2,})
    DEFINE zero AS val = '0')
)