should be it

external/duckdb/extension/tpcds/dsdgen/dsdgen-c/skip_days.cpp

@@ -0,0 +1,36 @@
+#include "skip_days.h"
+#include "date.h"
+#include "constants.h"
+#include "scaling.h"
+#include "parallel.h"
+
+ds_key_t skipDays(int nTable, ds_key_t *pRemainder) {
+	static date_t BaseDate;
+	ds_key_t jDate;
+	ds_key_t kRowCount, kFirstRow, kDayCount, index = 1;
+
+	if (!InitConstants::skipDays_init) {
+		strtodt(&BaseDate, DATA_START_DATE);
+		InitConstants::skipDays_init = 1;
+		*pRemainder = 0;
+	}
+
+	// set initial conditions
+	jDate = BaseDate.julian;
+	*pRemainder = dateScaling(nTable, jDate) + index;
+
+	// now check to see if we need to move to the
+	// the next piece of a parallel build
+	// move forward one day at a time
+	split_work(nTable, &kFirstRow, &kRowCount);
+	while (index < kFirstRow) {
+		kDayCount = dateScaling(nTable, jDate);
+		index += kDayCount;
+		jDate += 1;
+		*pRemainder = index;
+	}
+	if (index > kFirstRow) {
+		jDate -= 1;
+	}
+	return (jDate);
+}