甲骨文正則表達式（REGEXP_LIKE）太長錯誤 - ORA-12733

Question

我要驗證在PL/SQL的IPv6地址。我想出了正則表達式從這裏：Regular Expression (RegEx) for IPv6 Separate from IPv4

我正在一個ORA-12733: regular expression too long錯誤。有沒有辦法解決？

if (REGEXP_LIKE(v,'^(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]).){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]).){3,3}(25[0-5]|(2[0-4]1{0,1}[0-9]){0,1}[0-9]))$')) then 
    self.success := 1; 
    self.message := null; 
    return; 
else 
    self.success := 0; 
    self.message := 'Invalid IPv6 address. Example of a valid format: 2001:0db8:0000:0000:0000:ff00:0042:8329'; 
    return; 
end if; 

的限制是512（https://stackoverflow.com/a/2694119/3112803），我在657。我想不出有什麼辦法來分解它。

正在導入Java類到Oracle的唯一途徑？ https://community.oracle.com/thread/1149462?start=0&tstart=0

更新：我想這個，但是當我運行select測試它，它拋出ORA-29531: no method isProperIPv6Address in class ipv6。我之前並沒有在Oracle中與Java搞混，所以我不確定我是否接近或者這是一個糟糕的主意。

CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED ipv6 as 
public class ipv6 
{ 
    public static int isProperIPv6Address(String address) 
    { 
     try 
     { 
      java.net.Inet6Address.getByName(address); 
      return 1; 
     } catch(Exception e) { return 0; } 
    } 
} 

create or replace function isProperIPv6Address (string in varchar2) 
return number as language java name 'ipv6.isProperIPv6Address(java.lang.Int) return java.lang.Int'; 

select isProperIPv6Address('blah') from dual; 

但看來java.net.Inet6Address.getByName()將字面上出去上網，看看這個地址確實存在（從https://community.oracle.com/message/8648095拍攝）。我的理解是否正確？我不需要那個。我只需要驗證它們的語法是否有效。

Answer 1

有許多短的正則表達式的邏輯或更換您的長正則表達式^regexp1|regexp2|...$：
if (REGEXP_LIKE(v,'^regexp1$') OR REGEXP_LIKE(v,'^regexp2$') OR ...) then

UPDATE：

CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED ipv6 as 
import java.net.Inet6Address; 
public class ipv6 
... 
create or replace function isProperIPv6Address (string varchar2) return number 
as language java name 'ipv6.isProperIPv6Address(java.lang.String) return int';