io.delta.kernel.expressions

Interface Expression

All Known Subinterfaces:

Predicate

All Known Implementing Classes:

And, BinaryComparison, BinaryExpression, BinaryOperator, Column, EqualTo, LeafExpression, Literal

public interface Expression

Generic interface for all Expressions

Method Summary

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

Method Detail

eval

java.lang.Object eval(Row row)

Parameters:

row - the input row to evaluate.

Returns:

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

dataType

DataType dataType()

Returns:

the DataType of the result of evaluating this expression.

toString

java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

the String representation of this expression.

children

java.util.List<Expression> children()

Returns:

a List of the immediate children of this node

references

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

Returns:

the names of columns referenced by this expression.