Because this call specifies AUC ('true') and omits the ROC argument, the ROC argument has the value 'false'.
SELECT * FROM ROC ( ON (SELECT 1) PARTITION BY 1 InputTable ('roc') ModelIdColumn ('model') ProbabilityColumn ('probability') ObsColumn ('obs') OutputTable ('rocoutput21') PositiveClass ('p') NumThreshold ('100') AUC ('true') );