Package org.apache.druid.math.expr

Interface Expr.InputBindingInspector

All Known Subinterfaces:

ApplyFunction.IndexableFoldLambdaBinding, ApplyFunction.IndexableMapLambdaObjectBinding, ColumnIndexSelector, ColumnInspector, ColumnSelector, ColumnSelectorFactory, Expr.ObjectBinding, Expr.VectorInputBinding, Expr.VectorInputBindingInspector, QueryableIndex, StorageAdapter, VectorColumnSelectorFactory

All Known Implementing Classes:

AllNullColumnSelectorFactory, ApplyFunction.CartesianFoldLambdaBinding, ApplyFunction.CartesianMapLambdaBinding, ApplyFunction.FoldLambdaBinding, ApplyFunction.LambdaInputBindingInspector, ApplyFunction.MapLambdaBinding, ApplyFunction.SettableLambdaBinding, ColumnCache, ColumnSelectorColumnIndexSelector, DefaultColumnSelectorFactoryMaker.ColumnAccessorBasedColumnSelectorFactory, DeprecatedQueryableIndexColumnSelector, ExpressionLambdaAggregatorInputBindings, ExpressionVectorInputBinding, FilteredStorageAdapter, FrameColumnSelectorFactory, FrameQueryableIndex, FrameStorageAdapter, HashJoinSegmentStorageAdapter, IncrementalIndex, IncrementalIndexStorageAdapter, IndexedTableColumnSelectorFactory, InputBindings.BestEffortInputBindings, LookupColumnSelectorFactory, MultiColumnSelectorFactory, OnheapIncrementalIndex, QueryableIndexColumnSelectorFactory, QueryableIndexStorageAdapter, QueryableIndexVectorColumnSelectorFactory, RowBasedColumnSelectorFactory, RowBasedStorageAdapter, RowSignature, SettableObjectBinding, SimpleQueryableIndex, SingleInputBindings, UnnestStorageAdapter, VirtualizedColumnInspector, VirtualizedColumnSelectorFactory

Enclosing interface:

Expr

public static interface Expr.InputBindingInspector

Mechanism to supply input types for the bindings which will back IdentifierExpr, to use in the aid of inferring the output type of an expression with Expr.getOutputType(org.apache.druid.math.expr.Expr.InputBindingInspector). A null value means that either the binding doesn't exist, or, that the type information is unavailable.

Method Summary

Modifier and Type	Method	Description
default boolean	areNumeric(List<Expr> args)	Check if all provided Expr can infer the output type as TypeSignature.isNumeric() with a value of true (or null, which is not a type) There must be at least one expression with a computable numeric output type for this method to return true.
default boolean	areNumeric(Expr... args)	Check if all provided Expr can infer the output type as TypeSignature.isNumeric() with a value of true (or null, which is not a type) There must be at least one expression with a computable numeric output type for this method to return true.
default boolean	areSameTypes(List<Expr> args)	Check if all arguments are the same type (or null, which is not a type) This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)
default boolean	areSameTypes(Expr... args)	Check if all arguments are the same type (or null, which is not a type) This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)
default boolean	areScalar(List<Expr> args)	Check if all provided Expr can infer the output type as TypeSignature.isPrimitive() (non-array) with a value of true (or null, which is not a type) There must be at least one expression with a computable scalar output type for this method to return true.
default boolean	areScalar(Expr... args)	Check if all provided Expr can infer the output type as TypeSignature.isPrimitive() (non-array) with a value of true (or null, which is not a type) There must be at least one expression with a computable scalar output type for this method to return true.
default boolean	canVectorize(List<Expr> args)	Check if every provided Expr computes Expr.canVectorize(InputBindingInspector) to a value of true
default boolean	canVectorize(Expr... args)	Check if every provided Expr computes Expr.canVectorize(InputBindingInspector) to a value of true
ExpressionType	getType(String name)	Get the ExpressionType from the backing store for a given identifier (this is likely a column, but could be other things depending on the backing adapter)

Method Detail

getType

@Nullable
ExpressionType getType(String name)

Get the ExpressionType from the backing store for a given identifier (this is likely a column, but could be other things depending on the backing adapter)

areNumeric

default boolean areNumeric(List<Expr> args)

Check if all provided Expr can infer the output type as TypeSignature.isNumeric() with a value of true (or null, which is not a type) There must be at least one expression with a computable numeric output type for this method to return true. This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)

See Also:

Expr.getOutputType(InputBindingInspector)

areNumeric

default boolean areNumeric(Expr... args)

Check if all provided Expr can infer the output type as TypeSignature.isNumeric() with a value of true (or null, which is not a type) There must be at least one expression with a computable numeric output type for this method to return true. This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)

See Also:

Expr.getOutputType(InputBindingInspector)

areSameTypes

default boolean areSameTypes(List<Expr> args)

Check if all arguments are the same type (or null, which is not a type) This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)

See Also:

Expr.getOutputType(InputBindingInspector)

areSameTypes

default boolean areSameTypes(Expr... args)

Check if all arguments are the same type (or null, which is not a type) This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)

See Also:

Expr.getOutputType(InputBindingInspector)

areScalar

default boolean areScalar(List<Expr> args)

Check if all provided Expr can infer the output type as TypeSignature.isPrimitive() (non-array) with a value of true (or null, which is not a type) There must be at least one expression with a computable scalar output type for this method to return true. This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)

See Also:

Expr.getOutputType(InputBindingInspector)

areScalar

default boolean areScalar(Expr... args)

Check if all provided Expr can infer the output type as TypeSignature.isPrimitive() (non-array) with a value of true (or null, which is not a type) There must be at least one expression with a computable scalar output type for this method to return true. This method should only be used if getType(java.lang.String) produces accurate information for all bindings (no null value for type unless the input binding does not exist and so the input is always null)

See Also:

Expr.getOutputType(InputBindingInspector)

canVectorize

default boolean canVectorize(List<Expr> args)

Check if every provided Expr computes Expr.canVectorize(InputBindingInspector) to a value of true

canVectorize

default boolean canVectorize(Expr... args)

Check if every provided Expr computes Expr.canVectorize(InputBindingInspector) to a value of true