org.apache.drill.exec.vector.accessor

Class ColumnAccessors

java.lang.Object

org.apache.drill.exec.vector.accessor.ColumnAccessors

public class ColumnAccessors
extends Object

Basic accessors for most Drill vector types and modes. Each class has a bare-bones accessors that converts from the "native" Drill type to the vectors. Many classes also have "convenience" methods that convert from other Java types.

Writers work only with single vectors. Readers work with either single vectors or a "hyper vector": a collection of vectors indexed together. The details are hidden behind the RowIndex interface. If the reader accesses a single vector, then the mutator is cached at bind time. However, if the reader works with a hyper vector, then the vector is null at bind time and must be retrieved for each row (since the vector differs row-by- row.)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ColumnAccessors.BigIntColumnReader
static class	ColumnAccessors.BigIntColumnWriter
static class	ColumnAccessors.DateColumnReader
static class	ColumnAccessors.DateColumnWriter
static class	ColumnAccessors.Decimal18ColumnReader
static class	ColumnAccessors.Decimal18ColumnWriter
static class	ColumnAccessors.Decimal28SparseColumnReader
static class	ColumnAccessors.Decimal28SparseColumnWriter
static class	ColumnAccessors.Decimal38SparseColumnReader
static class	ColumnAccessors.Decimal38SparseColumnWriter
static class	ColumnAccessors.Decimal9ColumnReader
static class	ColumnAccessors.Decimal9ColumnWriter
static class	ColumnAccessors.Float4ColumnReader
static class	ColumnAccessors.Float4ColumnWriter
static class	ColumnAccessors.Float8ColumnReader
static class	ColumnAccessors.Float8ColumnWriter
static class	ColumnAccessors.IntColumnReader
static class	ColumnAccessors.IntColumnWriter
static class	ColumnAccessors.IntervalColumnReader
static class	ColumnAccessors.IntervalColumnWriter
static class	ColumnAccessors.IntervalDayColumnReader
static class	ColumnAccessors.IntervalDayColumnWriter
static class	ColumnAccessors.IntervalYearColumnReader
static class	ColumnAccessors.IntervalYearColumnWriter
static class	ColumnAccessors.SmallIntColumnReader
static class	ColumnAccessors.SmallIntColumnWriter
static class	ColumnAccessors.TimeColumnReader
static class	ColumnAccessors.TimeColumnWriter
static class	ColumnAccessors.TimeStampColumnReader
static class	ColumnAccessors.TimeStampColumnWriter
static class	ColumnAccessors.TinyIntColumnReader
static class	ColumnAccessors.TinyIntColumnWriter
static class	ColumnAccessors.UInt1ColumnReader
static class	ColumnAccessors.UInt1ColumnWriter
static class	ColumnAccessors.UInt2ColumnReader
static class	ColumnAccessors.UInt2ColumnWriter
static class	ColumnAccessors.UInt4ColumnReader
static class	ColumnAccessors.UInt4ColumnWriter
static class	ColumnAccessors.UInt8ColumnReader
static class	ColumnAccessors.UInt8ColumnWriter
static class	ColumnAccessors.Var16CharColumnReader
static class	ColumnAccessors.Var16CharColumnWriter
static class	ColumnAccessors.VarBinaryColumnReader
static class	ColumnAccessors.VarBinaryColumnWriter
static class	ColumnAccessors.VarCharColumnReader
static class	ColumnAccessors.VarCharColumnWriter
static class	ColumnAccessors.VarDecimalColumnReader
static class	ColumnAccessors.VarDecimalColumnWriter

Field Summary

Fields

Modifier and Type	Field and Description
static LocalDateTime	LOCAL_EPOCH

Constructor Summary

Constructors

Constructor and Description
ColumnAccessors()

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOCAL_EPOCH

public static final LocalDateTime LOCAL_EPOCH

Constructor Detail

ColumnAccessors

public ColumnAccessors()