Sure, you can do that. You do it by creating a persistent virtual column on the attribute, using COLUMN_GET probably, and then creating a column on that. In a presentation on JSON and MySQL / MariaDB I show a simple example of this:
http://www.slideshare.net/blueskarlsson/using-json-with-mariadb-and-mysql
See slide 20

Of course we would like this to be even smarter, but this is what is available and works as we speak.

/Karlsson
MARK CALLAGHAN skrev 2014-04-26 17:29:

Does the support for virtual columns allow an index to be created on an attribute in a JSON object stored in a BLOB column?

http://falseisnotnull.wordpress.com/2014/04/25/descending-indexes-in-mariadb
https://mariadb.com/kb/en/virtual-columns/

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Mark Callaghan
mdcallag@gmail.com
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Anders Karlsson, Senior Sales Engineer
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