Comment 2 for bug 837496

I'm just discovering OQGRAPH, and I immediately ran into this issue. I'm looking at OQG for simplifying management and queries of categorical data (trees) , and one of the queries I want to execute is "show me the paths for leaf nodes to the root of a branch." The query works for explicit values in an IN() clause but not the same values returned by a subquery.

I'll attach a simple case using a tiny subset of the Tree of Life data including EXPLAIN EXTENDED for each query. Generated using MariaDB 5.2.9.