io.delta.standalone.expressions

Interface Expression

All Known Subinterfaces:

Predicate

All Known Implementing Classes:

And, BinaryComparison, BinaryExpression, BinaryOperator, Column, EqualTo, GreaterThan, GreaterThanOrEqual, In, IsNotNull, IsNull, LeafExpression, LessThan, LessThanOrEqual, Literal, Not, Or, UnaryExpression

public interface Expression

An expression in Delta Standalone.

Method Summary

Modifier and Type	Method and Description
java.util.List<Expression>	children()
DataType	dataType()
Object	eval(RowRecord record)
default java.util.Set<String>	references()
String	toString()

Method Detail

eval

Object eval(RowRecord record)

Parameters:

record - the input record to evaluate.

Returns:

the result of evaluating this expression on the given input RowRecord.

dataType

DataType dataType()

Returns:

the DataType of the result of evaluating this expression.

toString

String toString()

Overrides:

toString in class Object

Returns:

the String representation of this expression.

references

default java.util.Set<String> references()

Returns:

the names of columns referenced by this expression.

children

java.util.List<Expression> children()

Returns:

a List of the immediate children of this node