Function EqualRowNumber

pkg/parquetquery/iters.go:72–81

EqualRowNumber compares the sequences of row numbers in a and b for partial equality. A little faster than CompareRowNumbers(d,a,b)==0

(upToDefinitionLevel int, a, b RowNumber)

// EqualRowNumber compares the sequences of row numbers in a and b
// for partial equality. A little faster than CompareRowNumbers(d,a,b)==0
func EqualRowNumber(upToDefinitionLevel int, a, b RowNumber) bool {
	// Compare in reverse order because most row number activity
	// occurs at the deeper definition levels.
	for i := upToDefinitionLevel; i >= 0; i-- {
		if a[i] != b[i] {
			return false
		}
	}
	return true
}

func truncateRowNumberSlow(definitionLevelToKeep int, t RowNumber) RowNumber {
	n := EmptyRowNumber()