Struct virtualRowNumberIterator

tempodb/encoding/vparquet5/row_number_iterator.go:46–53

virtualRowNumberIterator is an iterator that reads the row count from a column in a parquet file and uses this count to calculate virtual row numbers on the given definitionLevel. This is used to iterate over spans in a trace without actually reading a column on span definition level.

// to calculate virtual row numbers on the given definitionLevel. This is used to iterate over spans in a trace without
// actually reading a column on span definition level.
type virtualRowNumberIterator struct {
	iter            pq.Iterator // iterator returning the row count
	definitionLevel int         // definition level of virtual row numbers

	at       pq.IteratorResult
	rowsMax  int32
	rowsLeft int32
}

// newVirtualRowNumberIterator creates a new virtual row number iterator. The iterator will read the row count from the
// given column and use it to calculate virtual row numbers on the given definitionLevel. The row number column read by iter