@EverythingIsNonnullByDefault

Package org.apache.druid.segment.virtual

Class Summary

Class	Description
BaseExpressionColumnValueSelector	Base class for many (although not all) ColumnValueSelector<ExprEval>.
ExpressionColumnValueSelector	Basic expression ColumnValueSelector.
ExpressionMultiValueDimensionSelector	Basic multi-value dimension selector for an Expr evaluating ColumnValueSelector.
ExpressionPlan
ExpressionPlanner
ExpressionSelectors
ExpressionVectorInputBinding
ExpressionVectorObjectSelector
ExpressionVectorSelectors
ExpressionVectorValueSelector
ExpressionVirtualColumn
FallbackVirtualColumn	A virtual column that picks one column or another based on whether they exist.
ListFilteredVirtualColumn	VirtualColumn form of ListFilteredDimensionSpec, powered by ForwardingFilteredDimensionSelector
NestedFieldVirtualColumn	Optimized virtual column that can make direct selectors into a NestedDataComplexColumn or any associated nested fields (NestedFieldDictionaryEncodedColumn) including using their indexes.
NestedFieldVirtualColumn.FieldDimensionSelector
NestedFieldVirtualColumn.RawFieldColumnSelector	Process the "raw" data to extract values with NestedPathFinder.find(Object, List), wrapping the result in StructuredData
NestedFieldVirtualColumn.RawFieldLiteralColumnValueSelector	Process the "raw" data to extract non-complex values.
NestedFieldVirtualColumn.RawFieldVectorObjectSelector	Process the "raw" data to extract vectors of values with NestedPathFinder.find(Object, List), wrapping the result in StructuredData
RowBasedExpressionColumnValueSelector	Expression column value selector that examines a set of 'unknown' type input bindings on a row by row basis, transforming the expression to handle multi-value list typed inputs as they are encountered.
SingleInputBindings
SingleLongInputCachingExpressionColumnValueSelector	Like ExpressionColumnValueSelector, but caches the most recently computed value and re-uses it in the case of runs in the underlying column.
SingleStringInputCachingExpressionColumnValueSelector	Like ExpressionColumnValueSelector, but caches results for the first CACHE_SIZE dictionary IDs of a string column.
SingleStringInputCachingExpressionColumnValueSelector.LruEvalCache
SingleStringInputDeferredEvaluationExpressionDimensionSelector	A DimensionSelector decorator that directly exposes the underlying dictionary id in SingleStringInputDeferredEvaluationExpressionDimensionSelector.getRow(), saving expression computation until SingleStringInputDeferredEvaluationExpressionDimensionSelector.lookupName(int) is called.
SingleStringInputDeferredEvaluationExpressionDimensionVectorSelector	A SingleValueDimensionVectorSelector decorator that directly exposes the underlying dictionary ids in SingleStringInputDeferredEvaluationExpressionDimensionVectorSelector.getRowVector(), saving expression computation until SingleStringInputDeferredEvaluationExpressionDimensionVectorSelector.lookupName(int) is called.
VirtualColumnCacheHelper
VirtualizedColumnInspector	Provides ColumnCapabilities for both virtual and non-virtual columns by building on top of another base ColumnInspector.
VirtualizedColumnSelectorFactory	ColumnSelectorFactory which can create selectors for both virtual and non-virtual columns

Enum Summary

Enum	Description
ExpressionPlan.Trait