Package com.apple.foundationdb.record.query.predicates

Implementations of query predicates

Like QueryComponents, QueryPredicates represent (tri-valued) Boolean expressions on records. While they are generally similar, there are a few significant differences between the two interfaces, especially in how they handle predicates on repeated fields.

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Interface Summary

Interface	Description
PredicateWithValue	A predicate consisting of a Value.
QueryPredicate	Class to model the concept of a predicate.
Value	A scalar value type.

Class Summary

Class	Description
AndOrPredicate	Common base class for predicates with many children, such as AndPredicate and OrPredicate.
AndPredicate	A QueryPredicate that is satisfied when all of its child components are; For tri-valued logic: If all children are true, then true. If any child is false, then false. Else null.
BaseValue	A value representing the quantifier as an object.
ConstantPredicate	A predicate with a constant boolean value.
ExistsPredicate	An existential predicate that is true if the inner correlation produces any values, and false otherwise.
FieldValue	A value representing the contents of a (non-repeated, arbitrarily-nested) field of a quantifier.
LiteralValue<T>	A wrapper around a literal of the given type.
NotPredicate	A QueryPredicate that is satisfied when its child component is not satisfied.
OrPredicate	A QueryPredicate that is satisfied when any of its child components is satisfied.
QuantifiedColumnValue	A value representing the quantifier as an object.
QuantifiedObjectValue	A value representing the quantifier as an object.
QueryComponentPredicate	A QueryPredicate that is satisfied when its child component is satisfied.
RecordTypeValue	A value which is unique for each record type produced by its quantifier.
ValueComparisonRangePredicate	A special predicate used to represent a parameterized tuple range.
ValueComparisonRangePredicate.Placeholder	A place holder predicate solely used for index matching.
ValueComparisonRangePredicate.Sargable	A query predicate that can be used as a (s)earch (arg)ument for an index scan.
ValuePredicate	A predicate consisting of a Value and a Comparisons.Comparison.
VersionValue	A value representing a version stamp.