Professional Web Applications Themes

XOR - MySQL

Hi, I'm trying to use the XOR operation thus: SELECT * FROM Subnet WHERE (Subnet.Addr <= 2598746892) and (Subnet.Addr + (Subnet.Mask XOR (4294967295)) >= 4965828841 This is failing and I get the following error: You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 6. The Addr and Mask columns are both int's. I'm trying to XOR the Mask column with 4294967295 and add it to the value in the Addr column. What am I missing here? Thanks, Sashi...

  1. #1

    Default XOR

    Hi,

    I'm trying to use the XOR operation thus:

    SELECT *
    FROM Subnet
    WHERE
    (Subnet.Addr <= 2598746892)
    and
    (Subnet.Addr + (Subnet.Mask XOR (4294967295)) >= 4965828841

    This is failing and I get the following error:
    You have an error in your SQL syntax. Check the manual that
    corresponds to your MySQL server version for the right syntax to use
    near '' at line 6.

    The Addr and Mask columns are both int's. I'm trying to XOR the Mask
    column with 4294967295 and add it to the value in the Addr column.

    What am I missing here?
    Thanks,
    Sashi

    Sashi Guest

  2. #2

    Default Re: XOR

    Sashi wrote:
     


    There is a close bracket missing, or is that a typo?


    --
    Brian Wakem
    Email: http://homepage.ntlworld.com/b.wakem/myemail.png
    Brian Guest

  3. #3

    Default Re: XOR

    Sashi wrote: 

    Just a guess. Maybe 4965828841 > 4294967295?

    BTW - even if it were 64 bit this test would always be false.

    --
    ==================
    Remove the "x" from my email address
    Jerry Stuckle
    JDS Computer Training Corp.
    net
    ==================
    Jerry Guest

  4. #4

    Default Re: XOR

    "Sashi" <com> wrote in message
    news:googlegroups.com... 

    Two notes:

    a)The XOR in MySQL seems to be logical rather than bitwise.

    b)I'm not positive that you can use it in the WHERE clause.

    --
    David T. Ashley (com)
    http://www.e3ft.com (Consulting Home Page)
    http://www.dtashley.com (Personal Home Page)
    http://gpl.e3ft.com (GPL Publications and Projects)


    David Guest

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139