1. A computer-implemented method of dynamically generating traversal code for a graph analytics environment, the method comprising: in one or more processing systems, identifying a query expression from a relational analytics environment, wherein the query expression is written in a first language for a relational database; generating the traversal code for the graph analytics environment based on the query expression, wherein the traversal code is written in a second language; executing the traversal code in the graph analytics environment on a graphical database; and communicating results of the traversal code to the relational analytics environment, wherein communicating the results of the traversal code to the relational analytics environment comprises communicating the results of the traversal code to the relational analytics environment to update a relational database in the relational analytics environment.