Class ColumnReader<TValue>

Namespace

ParquetSharp

Assembly

ParquetSharp.dll

Reader of physical Parquet values from a single column.

public sealed class ColumnReader<TValue> : ColumnReader, IDisposable where TValue : unmanaged

Type Parameters

TValue

Inheritance

object

ColumnReader

ColumnReader<TValue>

Implements

IDisposable

Inherited Members

ColumnReader.Dispose()

ColumnReader.ColumnIndex

ColumnReader.LogicalTypeFactory

ColumnReader.LogicalReadConverterFactory

ColumnReader.ColumnDescriptor

ColumnReader.HasNext

ColumnReader.Type

ColumnReader.LogicalReader(int)

ColumnReader.LogicalReader(bool, int)

ColumnReader.LogicalReader<TElement>(int)

ColumnReader.LogicalReaderOverride<TElement>(int)

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Properties

ElementType

public override Type ElementType { get; }

Property Value

Type

Methods

Apply<TReturn>(IColumnReaderVisitor<TReturn>)

public override TReturn Apply<TReturn>(IColumnReaderVisitor<TReturn> visitor)

Parameters

visitor IColumnReaderVisitor<TReturn>

Returns

TReturn

Type Parameters

TReturn

ReadBatch(long, Span<short>, Span<short>, Span<TValue>, out long)

public long ReadBatch(long batchSize, Span<short> defLevels, Span<short> repLevels, Span<TValue> values, out long valuesRead)

Parameters

batchSize long

defLevels Span<short>

repLevels Span<short>

values Span<TValue>

valuesRead long

Returns

long

ReadBatch(long, Span<TValue>, out long)

public long ReadBatch(long batchSize, Span<TValue> values, out long valuesRead)

Parameters

batchSize long

values Span<TValue>

valuesRead long

Returns

long

Skip(long)

Skip physical row values

public override long Skip(long numRowsToSkip)

Parameters

numRowsToSkip long

number of rows to skip

Returns

long

the number of physical rows skipped