awk匹配正则问题

nugget

例子：
               9360342 Query   SET character_set_connection='utf8',character_set_results='utf8',character_set_client=binary, sql_mo
de=''
                9360342 Query   SET character_set_connection='utf8',character_set_results='utf8',character_set_client=binary, sql_mo
de=''
                9360340 Quit
                9360338 Quit

我用awk匹配行中带有7个数字的，怎么也匹配不上。
awk '{if($1~/\[0-9\]\{7\}/){print $1} else print "err"}'
用$0全行匹配也不行
awk '{if($0~/\[0-9\]\{7\}/){print $1} else print "err"}'

blackold

回复 1# nugget

interval expression:
    http://bbs.chinaunix.net/forum.p ... ;page=1#pid12638391

Shell_HAT

1. awk --re-interval '{if($1~/[0-9]{7}/){print $1} else print "err"}' urfile

复制代码

bikong0411

--re-interval支持区间匹配

xiaochuanjiejie

nugget 发表于 2012-03-05 21:15
例子：
               9360342 Query   SET character_set_connection='utf8',character_set_results='u ...

最佳解释：

r{n,m}     One  or  two numbers inside braces denote an interval expression.  If there is one number in the braces, the preceding regular expression r is repeated n times.  If there are two numbers separated by a comma, r is repeated n to m times.  If there is one number followed by a comma, then r is repeated at least n times. Interval expressions are only available if either --posix or --re-interval is specified on the command line.

jason680

sorry, I got a mistake

todayhero

1. [root@GO-EMAIL-1 ~]# awk --posix '$0 ~ /[0-9]{7}/' urfile   
   
2. 9360342 Query   SET character_set_connection='utf8',character_set_results='utf8',character_set_client=binary, sql_mo
   
3. 9360342 Query   SET character_set_connection='utf8',character_set_results='utf8',character_set_client=binary, sql_mo
   
4. 9360340 Quit
   
5. 9360338 Quit

复制代码

加--posix也没问题吧！