printjson(testDb.runCommand({
create:'ts',
timeseries: \{timeField:'t', metaField:'m'}
}));

printjson(testDb.ts.insert(\{t: new Date(), m: 1, x: 1}));
 
printjson(testDb.runCommand({
update:'ts',
updates: [
{
q: \{$jsonSchema: []},
u: \{$set: {m:2}},
multi:true
}
]
}));