org.apache.druid.math.expr

Class ExpressionProcessing

java.lang.Object

org.apache.druid.math.expr.ExpressionProcessing

public class ExpressionProcessing
extends Object

Like NullHandling, except for expressions processing configs

Constructor Summary

Constructors

Constructor and Description
ExpressionProcessing()

Method Summary

Modifier and Type	Method and Description
static void	initializeForHomogenizeNullMultiValueStrings()
static void	initializeForStrictBooleansTests(boolean useStrict)
static void	initializeForTests() Many unit tests do not setup modules for this value to be injected, this method provides a manual way to initialize INSTANCE
static boolean	isHomogenizeNullMultiValueStringArrays() All multi-value string expression input values of 'null', '[]', and '[null]' will be coerced to '[null]'.
static boolean	processArraysAsMultiValueStrings() All ExprType.ARRAY values will be converted to ExpressionType.STRING by their column selectors (not within expression processing) to be treated as multi-value strings instead of native arrays.
static boolean	useStrictBooleans() All boolean expressions are ExpressionType.LONG

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionProcessing

public ExpressionProcessing()

Method Detail

initializeForTests

public static void initializeForTests()

Many unit tests do not setup modules for this value to be injected, this method provides a manual way to initialize INSTANCE

initializeForStrictBooleansTests

public static void initializeForStrictBooleansTests(boolean useStrict)

initializeForHomogenizeNullMultiValueStrings

public static void initializeForHomogenizeNullMultiValueStrings()

useStrictBooleans

public static boolean useStrictBooleans()

All boolean expressions are ExpressionType.LONG

processArraysAsMultiValueStrings

public static boolean processArraysAsMultiValueStrings()

All ExprType.ARRAY values will be converted to ExpressionType.STRING by their column selectors (not within expression processing) to be treated as multi-value strings instead of native arrays.

isHomogenizeNullMultiValueStringArrays

public static boolean isHomogenizeNullMultiValueStringArrays()

All multi-value string expression input values of 'null', '[]', and '[null]' will be coerced to '[null]'. If false, (the default) this will only be done when single value expressions are implicitly mapped across multi-value rows, so that the single valued expression will always be evaluated with an input value of 'null'