Processing data between data stores

A system comprising:

• a non-transitory memory to store machine-readable instructions;
• and
• a processing resource to access the memory and execute the machine-readable instructions, the machine-readable instructions comprising:
• a connector to establish a connection between a relational data store and a graph engine, wherein the connection comprises a shared memory buffer;
• and
• a convertor system to transform relational data from a relational data format to a graph engine format according to internal data structures of the graph engine and to store the transformed data, including vertex data and edge data, in the shared memory buffer of the connection.

A method comprising:

• receiving, at a relational database from an application, a query for data;
• transforming the data from the relational database to a graph engine format according to internal data structures of a graph engine, the transformed data being stored in a shared memory of a connection that employs;
• providing location references to the graph engine for accessing the transformed data in the shared memory;
• performing a computation on the data in the graph engine format using the graph engine, wherein the computation is based on the query;
• and
• using the relational database or the graph engine to report a result of the query to the application.