Fix NextPath for optimized queries in SQL

cayleygraph / cayley

An open-source graph database

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Fix NextPath for optimized queries in SQL #848

Closed dennwc closed 4 years ago

dennwc commented 4 years ago

When optimizing queries for SQL, we missed the fact that NodesFrom and derived queries make use of NextPath which is not implemented on SQL iterators.

This PR fixes it by emulating the same behavior for both Next and Contains.

Fixes #724

This change is