You're making me live

Monday, 26 November 2007

Is there an existing system which will allow me to query Apache logfiles via an SQL string? (Without importing into a database first).

I've found the perl library SQL::YASL - but that has a couple of omissions which mean it isn't ideal for my task:

  • It doesn't understand DISTINCT
  • It doesn't understand COUNT
  • It doesn't understand SUM

Still it did allow me to write a simple shell which works nicely for simple cases:

SQL>LOAD /home/skx/hg/engaging/logs/access.log;
SQL>select path,size from requests where size > 10000;
path size 
/css/default.css 13813 
/js/prototype.js 71261 
/js/effects.js 37872 
/js/dragdrop.js 30645 
/js/controls.js 28980 
/js/slider.js 10403 
/view/messages 15447 
/view/messages 15447 
/recent/messages 25378 

It does mandate the use of a "WHERE" clause, but that was easily fixed with "WHERE 1=1". If I could just have support for count I could do near realtime interesting things...

Then again maybe I should just log directly and not worry about it. I certainly don't want to create my own SQL engine .. it just seems that Perl doesn't have a suitable library already made which is a bit of a shocker!

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