Should we have a ATTACH graph?

[adsharma]

If your main db is test.lbdb and you run CREATE GRAPH mygraph;, it leaves a test.mygraph.lbdb on the disk.

The subgraph has its own storage manager and catalog. The main db catalog has references to it, but deleted when the subgraph is dropped.

Problems:

• If you quit the CLI and restart, the subgraph is no longer visible. Should we add ATTACH GRAPH syntax?

• ladybug/test/test_files/graph/graph.test

  Lines 5 to 11 in 59967bc

  	-CASE CreateGraphAndUseGraph
  	-SKIP_FSM_LEAK_CHECK
  	-LOG This test creates per-graph StorageManagers which allocate pages from the main database's
  	-LOG buffer manager. The FSM leak check expects all pages to be accounted for in the main database
  	-LOG header, but pages from per-graph storage managers may not be properly reclaimed during
  	-LOG checkpoint. This needs further debugging to properly track and reclaim pages across all
  	-LOG per-graph storage managers.

  has some leaks. Investigate and fix.