Package io.delta.kernel.expressions

Interface ExpressionEvaluator

All Superinterfaces:

AutoCloseable

@Evolving
public interface ExpressionEvaluator
extends AutoCloseable

Interface for implementing an Expression evaluator. It contains one Expression which can be evaluated on multiple ColumnarBatches Connectors can implement this interface to optimize the evaluation using the connector specific capabilities.

Since:

3.0.0

Method Summary

Modifier and Type	Method	Description
ColumnVector	eval(ColumnarBatch input)	Evaluate the expression on given ColumnarBatch data.

Methods inherited from interface java.lang.AutoCloseable

close

Method Details

eval

ColumnVector eval(ColumnarBatch input)

Evaluate the expression on given ColumnarBatch data.

Parameters:

input - input data in columnar format.

Returns:

Result of the expression as a ColumnVector. Contains one value for each row of the input. The data type of the output is same as the type output of the expression this evaluator is using.