On Tue, Sep 01, 2015 at 01:15:59PM -0400, James Keener wrote:

> I'd also like to point out that the primary key need not be a single field. 
> For instance (state_fips, county_fips) could be a valid key for county-based 
> metrics. Going back to the previous question I posed, do we want to tell 
> users to conform to a single-field primary key or will qgis accept valid 
> schema designs. Again, it comes down to dev time vs the cost to the user 
> experience.

<brainstorming>
I'd note that supporting complex primary keys would also allow
qgis to identify rows based on an expensively computed fingerprint
of the hash of the canonical form of each and every field.
</brainstorming>

--strk;
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