org.apache.drill.exec.expr.fn.interpreter

Class InterpreterEvaluator

java.lang.Object

org.apache.drill.exec.expr.fn.interpreter.InterpreterEvaluator

public class InterpreterEvaluator
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	InterpreterEvaluator.EvalVisitor

Constructor Summary

Constructors

Constructor and Description
InterpreterEvaluator()

Method Summary

Modifier and Type	Method and Description
static void	evaluate(int recordCount, UdfUtilities udfUtilities, VectorAccessible incoming, ValueVector outVV, LogicalExpression expr)
static void	evaluate(RecordBatch incoming, ValueVector outVV, LogicalExpression expr)
static ValueHolder	evaluateConstantExpr(UdfUtilities udfUtilities, LogicalExpression expr)
static ValueHolder	evaluateFunction(DrillSimpleFunc interpreter, Object[] args, String funcName) Assigns specified Object[] args to the function arguments, evaluates function and returns its result.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InterpreterEvaluator

public InterpreterEvaluator()

Method Detail

evaluateConstantExpr

public static ValueHolder evaluateConstantExpr(UdfUtilities udfUtilities,
                                               LogicalExpression expr)

evaluate

public static void evaluate(RecordBatch incoming,
                            ValueVector outVV,
                            LogicalExpression expr)

evaluate

public static void evaluate(int recordCount,
                            UdfUtilities udfUtilities,
                            VectorAccessible incoming,
                            ValueVector outVV,
                            LogicalExpression expr)

evaluateFunction

public static ValueHolder evaluateFunction(DrillSimpleFunc interpreter,
                                           Object[] args,
                                           String funcName)
                                    throws Exception

Assigns specified Object[] args to the function arguments, evaluates function and returns its result.

Parameters:

interpreter - function to be evaluated

args - function arguments

funcName - name of the function

Returns:

result of function call stored in ValueHolder

Throws:

Exception - if args types does not match function input arguments types