Six groups where the spec allows four
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.
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