When loading the open data tables from datatables.org, some XML files get loaded that are no data tables.
I am using this as my env: env=store://datatables.org/alltableswithkeys

e.g. the /bible folder contains a couple of files that look like some sort of resource files but are no data tables for sure.

Interestingly enough the search function of the YQL console ignores these files.

Try:
http://developer.yahoo.com/yql/console/?q=...ltableswithkeys