ERROR: Table: insert relation failed: java.io.NotSerializableException: ca.mb.armchair.rel3.storage.RelvarPrivateCell
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var items private relation { id integer, name character } init ( relation { tuple {id 1, name "hi" }, tuple {id 2, name "lo"}, tuple {id 3, name "do"} } ) key {id};
var result private relation { r relation same_heading_as (items) } key { r };
var inner private relation same_heading_as (items) key {id};
insert inner relation { tuple from items where id = 1 };
insert result relation {tuple {r inner }};