SSB at SF10 was the last benchmark where Trino beat us, and the gap was one serial scan feeding eight idle cores. Closing it took three fixes: parallelize the probe scan, assign byte-range splits instead of whole files, and stop trusting a flag that had never actually fired. Along the way the row counts started lying. Three TPC-DS queries returned exactly eight times their LIMIT, and the mechanism is a lesson in what parallelism does to a plan that was optimized while it was still serial.
TPC-H q01 returned six (returnflag, linestatus) combinations on our generated data. The spec defines exactly four. Both SQE and Trino agreed on the wrong answer, because both read the same broken tables. The bug class behind it: fields the spec derives from other fields, drawn instead as independent uniform random. Five defects in TPC-H, one in SSB, all the same shape.