dlyubimov/HBase-Lattice — Issue #5: Support hierarchy constant specifications in query parser
Author: dlyubimov
Created: 2011-12-22 19:15:20+00:00
State: open

So hbl has a representation of HierarchicalMember (which is just a value represented by first N steps of hierarchy, something like [ALL].[2011/07].[12/12:00:00]

you can probably even use it in query (i did not debug it yet as we dont really have a usecase so far, we specify time as a continuous parameter usually) by substituting ? parameter with instance of HierarchyMember . But currently AST wouldn't allow constant specifications that would materialize into an instance of a HierarchyMember.

so I guess it would be a useful capability, especially when we can add a tutorial of running queries with command line instead of embedded workflow, because with command line one can't bind prepared query parameters (of course).