Discussion | Supporting different mara db engines than PostgreSQL

[leo-schick]

This issue holds a list of tasks to be done before other db engins than PostgreSQL can be used as mara db alias.

• replace cursor context calls with SQLAlchemy Query API
• find alternative ways to store the node path. Currently it is stored as string array. Potentially it could be stored in a singe comma separated string pipeline,my_parallel_task,before ...