Class ScalarFunction
java.lang.Object
org.elasticsearch.xpack.esql.core.tree.Node<Expression>
org.elasticsearch.xpack.esql.core.expression.Expression
org.elasticsearch.xpack.esql.core.expression.function.Function
org.elasticsearch.xpack.esql.core.expression.function.scalar.ScalarFunction
- All Implemented Interfaces:
NamedWriteable,Writeable,Resolvable
- Direct Known Subclasses:
BinaryScalarFunction,UnaryScalarFunction
A
ScalarFunction is a Function that takes values from some
operation and converts each to another value. An example would be
ABS(), which takes one value at a time, applies a function to the
value (abs) and returns a new value.-
Nested Class Summary
Nested classes/interfaces inherited from class org.elasticsearch.xpack.esql.core.expression.Expression
Expression.TypeResolutionNested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable
Writeable.Reader<V>, Writeable.Writer<V> -
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final longLimit for the BytesRef return of functions. -
Constructor Summary
ConstructorsModifierConstructorDescriptionprotectedScalarFunction(Source source) protectedScalarFunction(Source source, List<Expression> fields) -
Method Summary
Methods inherited from class org.elasticsearch.xpack.esql.core.expression.function.Function
arguments, equals, functionName, hashCode, nodeString, nullableMethods inherited from class org.elasticsearch.xpack.esql.core.expression.Expression
canonical, canonicalize, childrenResolved, dataType, fold, foldable, propertiesToString, references, resolved, resolveType, semanticEquals, semanticHash, toString, typeResolvedMethods inherited from class org.elasticsearch.xpack.esql.core.tree.Node
anyMatch, children, collect, collectFirstChildren, collectLeaves, doCollectFirst, forEachDown, forEachDown, forEachProperty, forEachPropertyDown, forEachPropertyOnly, forEachPropertyUp, forEachUp, forEachUp, info, nodeName, nodeProperties, replaceChildren, replaceChildrenSameSize, source, sourceLocation, sourceText, transformChildren, transformDown, transformDown, transformNodeProps, transformPropertiesDown, transformPropertiesOnly, transformPropertiesUp, transformUp, transformUpMethods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface org.elasticsearch.common.io.stream.NamedWriteable
getWriteableName
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Field Details
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MAX_BYTES_REF_RESULT_SIZE
public static final long MAX_BYTES_REF_RESULT_SIZELimit for the BytesRef return of functions.To be used when there's no CircuitBreaking, as an arbitrary measure to limit memory usage.
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Constructor Details
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ScalarFunction
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ScalarFunction
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