public class NullIgnoringDBGroupConcatFunctionSymbol extends AbstractDBAggregationFunctionSymbol
FunctionSymbol.FunctionalTermNullability| Modifier | Constructor and Description |
|---|---|
protected |
NullIgnoringDBGroupConcatFunctionSymbol(DBTermType dbStringType,
boolean isDistinct,
DBFunctionSymbolSerializer serializer) |
| Modifier and Type | Method and Description |
|---|---|
Constant |
evaluateEmptyBag(TermFactory termFactory) |
protected boolean |
isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms()
When the function symbol is, in the absence of non-injective functional sub-terms, sometimes but not always injective,
please override isInjective(...)
|
protected boolean |
mayReturnNullWithoutNullArguments()
Returns false when a functional term with this symbol:
1.
|
protected boolean |
tolerateNulls()
Returns true if is not guaranteed to return NULL when one argument is NULL.
|
buildTermAfterEvaluation, getNativeDBString, isPreferringToBePostProcessedOverBeingBlockedcanBePostProcessed, inferType, isAggregation, isDistinctanalyzeInjectivity, canBeSafelyDecomposedIntoConjunction, decomposeInjectiveTopFunctionalTerm, enableIfElseNullLifting, evaluateIsNotNull, evaluateNullability, evaluateStrictEq, evaluateStrictEqWithFunctionalTerm, evaluateStrictEqWithNonNullConstant, getExpectedBaseType, getExpectedBaseTypes, isDeterministic, isInjective, isNullable, proposeProvenanceVariables, simplify, simplifyAsGuaranteedToBeNonNull, transformIntoRegularArguments, tryToLiftMagicNumbersequals, getArity, getName, hashCode, toStringclone, finalize, getClass, notify, notifyAll, wait, wait, waitanalyzeInjectivity, canBePostProcessed, evaluateIsNotNull, evaluateNullability, evaluateStrictEq, getExpectedBaseType, inferType, isAggregation, isDeterministic, isNullable, proposeProvenanceVariables, simplify, simplifyAsGuaranteedToBeNonNullprotected NullIgnoringDBGroupConcatFunctionSymbol(@Nonnull DBTermType dbStringType, boolean isDistinct, @Nonnull DBFunctionSymbolSerializer serializer)
public Constant evaluateEmptyBag(TermFactory termFactory)
protected boolean isAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms()
FunctionSymbolImplisAlwaysInjectiveInTheAbsenceOfNonInjectiveFunctionalTerms in class FunctionSymbolImplprotected boolean tolerateNulls()
FunctionSymbolImpltolerateNulls in class FunctionSymbolImplprotected boolean mayReturnNullWithoutNullArguments()
FunctionSymbolImplmayReturnNullWithoutNullArguments in class FunctionSymbolImplCopyright © 2009–2020 Free University of Bozen-Bolzano. All rights reserved.