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Remove certain section from the line

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Top Forums Shell Programming and Scripting Remove certain section from the line
# 1  
Old 08-17-2009
Remove certain section from the line
A typical line looks like this...

Code:
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=129  COMMENT='Compiled E-Mails';

I want to remove DEFAULT CHARSET= and COLLATE= after resetting AUTO_INCREMENT=0
I do not want to change the engine and comment.
# 2  
Old 08-17-2009
Assuming you want it to cope with the order of params changing:
Code:
sed 's/DEFAULT CHARSET=[^ ]* //;s/COLLATE=[^ ]* //;s/AUTO_INCREMENT=[^ ]* /AUTO_INCREMENT=0/'

# 3  
Old 08-17-2009
Thanks. But it it does not work when the line does not has the auto_increment clause. In the example, the third line is wrong. There should have been no "Default charset".

Code:
>> cat test.txt
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=482 COLLATE=utf8 COMMENT="testing deletion using sed";
) ENGINE=InnoDB AUTO_INCREMENT=482 DEFAULT CHARSET=utf8 COLLATE=utf8 COMMENT="testing deletion using sed";
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

>> sed 's/DEFAULT CHARSET=[^ ]* //;s/COLLATE=[^ ]* //;s/AUTO_INCREMENT=[^ ]* /AUTO_INCREMENT=0 /' test.txt
) ENGINE=InnoDB AUTO_INCREMENT=0 COMMENT="testing deletion using sed";
) ENGINE=InnoDB AUTO_INCREMENT=0 COMMENT="testing deletion using sed";
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

# 4  
Old 08-17-2009
try this:

Code:
$more file10
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=482 COLLATE=utf8 COMMENT="testing deletion using sed";
) ENGINE=InnoDB AUTO_INCREMENT=482 DEFAULT CHARSET=utf8 COLLATE=utf8 COMMENT="testing deletion using sed";
) ENGINE=MyISAM DEFAULT CHARSET=latin1;


awk '
{
    for (word=1;word <NF; word++)
    {
        if  (index($word,"DEFAULT") || index($word, "CHARSET=") || index($word, "COLLATE="))
            $word=""
        else
        if  (index($word, "AUTO_INCREMENT="))
            $word="AUTO_INCREMENT=0"
    }
    print $0 

}
' file10

Result:
) ENGINE=InnoDB   AUTO_INCREMENT=0  COMMENT="testing deletion using sed";
) ENGINE=InnoDB AUTO_INCREMENT=0    COMMENT="testing deletion using sed";
) ENGINE=MyISAM  CHARSET=latin1;

# 5  
Old 08-19-2009
Thanks chipcmc.
But as shown in your own example, the CHARSET=latin1; is still there on line 3. The lines 1 and 2 are OK.
# 6  
Old 08-19-2009
Quote:
Originally Posted by shantanuo
Thanks chipcmc.
But as shown in your own example, the CHARSET=latin1; is still there on line 3. The lines 1 and 2 are OK.
Yes is true, the problem is the bucle for xD the condition is <NF Smilie...change for <=NF and everything is OK ..
# 7  
Old 08-19-2009
I see the issue, I'd not thought about the end of line character:
Code:
sed 's/DEFAULT CHARSET=[^ \;]*//;s/COLLATE=[^ \;]*//;s/AUTO_INCREMENT=[^ \;]*/AUTO_INCREMENT=0 /'
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