Handle create table.

Handle delete.

Handle find.

Handle inserts.

Handle join.

Handle write lock requests.

Handle pretty printing.

Handle select.

Handle transaction.

Handle update.

Construct a new graph.

Construct a new lock manager.

Get a pointer to a new transaction manager.

Transaction REPL.

Edge.

Graph.

Lock manager handles transaction-level locks over database resources.

A resource.

Each client can have a transaction running.

Transaction Manager manages all of the transactions on a server.

Indicates whether a lock is a reader or a writer lock.