Package org.apache.druid.segment.virtual

Class ExpressionVectorSelectors

java.lang.Object

org.apache.druid.segment.virtual.ExpressionVectorSelectors

public class ExpressionVectorSelectors
extends Object

Method Summary

Modifier and Type	Method	Description
static VectorObjectSelector	castObject(ReadableVectorInspector inspector, String columnName, VectorObjectSelector selector, ColumnType selectorType, ColumnType castTo)
static VectorValueSelector	castObjectSelectorToNumeric(ReadableVectorInspector inspector, String columnName, VectorObjectSelector selector, ColumnType selectorType, ColumnType castTo)
static VectorObjectSelector	castValueSelectorToObject(ReadableVectorInspector inspector, String columnName, VectorValueSelector selector, ColumnType selectorType, ColumnType castTo)
static GroupByVectorColumnSelector	makeGroupByVectorColumnSelector(VectorColumnSelectorFactory factory, Expr expression, DeferExpressionDimensions deferExpressionDimensions)	Creates a ExpressionDeferredGroupByVectorColumnSelector for the provided expression, if the provided DeferExpressionDimensions says we should.
static SingleValueDimensionVectorSelector	makeSingleValueDimensionVectorSelector(VectorColumnSelectorFactory factory, Expr expression)
static VectorObjectSelector	makeVectorObjectSelector(VectorColumnSelectorFactory factory, Expr expression, ColumnType outputTypeHint)
static VectorValueSelector	makeVectorValueSelector(VectorColumnSelectorFactory factory, Expr expression)

Methods inherited from class java.lang.Object

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

Method Details

makeSingleValueDimensionVectorSelector

public static SingleValueDimensionVectorSelector makeSingleValueDimensionVectorSelector(VectorColumnSelectorFactory factory,
 Expr expression)

makeVectorValueSelector

public static VectorValueSelector makeVectorValueSelector(VectorColumnSelectorFactory factory,
 Expr expression)

makeVectorObjectSelector

public static VectorObjectSelector makeVectorObjectSelector(VectorColumnSelectorFactory factory,
 Expr expression,
 @Nullable
 ColumnType outputTypeHint)

makeGroupByVectorColumnSelector

@Nullable
public static GroupByVectorColumnSelector makeGroupByVectorColumnSelector(VectorColumnSelectorFactory factory,
 Expr expression,
 DeferExpressionDimensions deferExpressionDimensions)

Creates a ExpressionDeferredGroupByVectorColumnSelector for the provided expression, if the provided DeferExpressionDimensions says we should.

Parameters:

factory - column selector factory

expression - expression

deferExpressionDimensions - active value of GroupByQueryConfig.CTX_KEY_DEFER_EXPRESSION_DIMENSIONS

Returns:

selector, or null if the DeferExpressionDimensions determines we should not defer the expression

castValueSelectorToObject

public static VectorObjectSelector castValueSelectorToObject(ReadableVectorInspector inspector,
 String columnName,
 VectorValueSelector selector,
 ColumnType selectorType,
 ColumnType castTo)

castObject

public static VectorObjectSelector castObject(ReadableVectorInspector inspector,
 String columnName,
 VectorObjectSelector selector,
 ColumnType selectorType,
 ColumnType castTo)

castObjectSelectorToNumeric

public static VectorValueSelector castObjectSelectorToNumeric(ReadableVectorInspector inspector,
 String columnName,
 VectorObjectSelector selector,
 ColumnType selectorType,
 ColumnType castTo)