It would be better, but I believe MediaWiki already uses this type of
storage. Changing to binary would require a schema change.

*--*
*Tyler Romeo*
Stevens Institute of Technology, Class of 2015
Major in Computer Science
www.whizkidztech.com | tylerro...@gmail.com



On Tue, Sep 25, 2012 at 2:20 PM, Artur Fijałkowski <wiki.w...@gmail.com>wrote:

> > <tl;dr> Where an index is desired on a mysql column of base36 encoded
> sha1
> > hashes, I recommend ADD INDEX (sha1column(10)).  Shorter indexes will be
> > sufficient in many cases, but this is still provides a >2/3 space savings
> > while covering a huge (2^51.43) space.
>
> Isn't it better to store BIGINT containing part of (binary) sha1 and
> use index on numeric column?
>
> AJF/WarX
>
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