test/trace_processor/span_join_unordered_cols_synth_1.out

"ts","dur","part","b1","b2","b3","a1","a2","a3"
10,90,0,"A",10,100,"B",2,101
100,1,0,"B",90,200,"C",3,102
5,5,1,"A",10,100,"A",1,100
10,40,1,"A",10,100,"B",2,101
50,40,1,"B",90,200,"B",2,101
90,10,1,"C",1,300,"B",2,101
100,1,1,"C",1,300,"C",3,102