[eml-dev] [Bug 2979] New: - create Union query to concatenate results from multiple entities

[bugzilla-daemon@ecoinformatics.org]

http://bugzilla.ecoinformatics.org/show_bug.cgi?id=2979

           Summary: create Union query to concatenate results from multiple
                    entities
           Product: EML
           Version: 2.0.1
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: datamanager
        AssignedTo: leinfelder at nceas.ucsb.edu
        ReportedBy: leinfelder at nceas.ucsb.edu
         QAContact: eml-dev at ecoinformatics.org


The motivation for this enhancement came from both Kepler (wanting to merge
data from like-structured datatables in an EMLDataSource actor) and from the
FIRST project where a similar function is desired (but across many different
packages).
Implementation is intended to be a straightforward SQL union/union all between
two or more Query objects.