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  • Pattern Matching Metacharacters For asm_diskstring

     

    This document will list the possible meta characters for asm_diskstring parameter

     

    Solution

    * and [] are the two valid meta characters for asm_diskstring parameter.

    SQL> alter system set asm_diskstring='/dev/raw/raw*' scope=both;
    System altered.

    SQL> select path from v$asm_disk;
    PATH
    --------------------------------------------------------------------------------
    /dev/raw/raw1
    /dev/raw/raw2
    /dev/raw/raw3
    /dev/raw/raw4
    /dev/raw/raw5
    /dev/raw/raw11
    /dev/raw/raw12
    /dev/raw/raw7
    /dev/raw/raw8
    /dev/raw/raw9
    /dev/raw/raw10
    /dev/raw/raw6

    12 rows selected.


    SQL> alter system set asm_diskstring='/dev/raw/raw[1-5]' scope=both;
    System altered.

    SQL> select path from v$asm_disk order by 1;
    PATH
    --------------------------------------------------------------------------------
    /dev/raw/raw1
    /dev/raw/raw2
    /dev/raw/raw3
    /dev/raw/raw4
    /dev/raw/raw5


    Characters like $ [0-9*] ^ _ etc would either give error, or will be ignored.


    SQL> alter system set asm_diskstring='/dev/raw/raw$' scope=both;

    alter system set asm_diskstring='/dev/raw/raw$' scope=both
    *
    ERROR at line 1:
    ORA-02097: parameter cannot be modified because specified value is invalid
    ORA-15031: disk specification '/dev/raw/raw$' matches no disks
    ORA-15056: additional error message

     

     

     

     

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  • 原文地址:https://www.cnblogs.com/tianlesoftware/p/3609711.html
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