Are you talking about plain Riak, or using secondary indexes, or of Riak Search?

The question makes most sense in context of Riak Search.
If the page
  http://wiki.basho.com/Riak-Search---Querying.html
is up-to-date, then the answer appears to be 'no' - wildcards (*,?) are 
supported, but
    "Currently, the wildcard must come at the end of the term in both cases."
i.e. only prefix queries can be used, not queries of arbitrary substrings.

Trusting that someone will correct me if I'm wrong,

/Erik


Mobile: + 45 2636 1755 | Skype: eriksoesorensen | Twitter: @eriksoe
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________________________________________
From: [email protected] [[email protected]] 
On Behalf Of Hursh Prasad [[email protected]]
Sent: 25 March 2012 22:04
To: [email protected]
Subject: Re: Welcome to the "riak-users" mailing list

Does Riak support (or what are the options for) substring search?

Example "ball" or "bal" in basketball?

Thanks,
Hursh

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