{ "Columns":[ { "Name":"building", "Multiplicity":"1", "Type":"String" }, { "Name":"meter", "Multiplicity":"1", "Type":"String" }, { "Name":"funcid", "Multiplicity":"1", "Type":"Long" }, { "Name":"compute_time", "Multiplicity":"1", "Type":"String" }, { "Name":"data_time", "Multiplicity":"1", "Type":"String" }, { "Name":"first_compute_time", "Multiplicity":"1", "Type":"String" } ], "Key":[ "building", "meter", "funcid" ], "Indexes":[ ] }