Module com.darkcollective.relix.ast

Package com.darkcollective.relix.ast

Record Class QuantifiedPredicate

java.lang.Object

java.lang.Record

com.darkcollective.relix.ast.QuantifiedPredicate

Record Components:

left - the value compared; must not be null

operator - the comparison; must not be null

quantifier - whether some or every comparison must hold; must not be null

query - the one-column relation compared with; must not be null

location - the source location of the predicate's first token; never null

All Implemented Interfaces:

Predicate

public record QuantifiedPredicate(Operand left, ComparisonOperator operator, Quantifier quantifier, RelNode query, SourceLocation location)
extends Record
implements Predicate

A comparison with every value of a one-column relation: x > ALL (π v (S)), x = ANY (π v (S)). x IN (π v (S)) is = ANY, and NOT IN a NotPredicate over it.

The comparisons are three-valued, as SQL's are. ANY is true when one of them is true, UNKNOWN when none is but one is UNKNOWN, and false otherwise; ALL is false when one is false, UNKNOWN when none is but one is UNKNOWN, and true otherwise. Over no rows ANY is false and ALL true, whatever x is.

Constructor Summary

Constructors

Constructor	Description
QuantifiedPredicate(Operand left, ComparisonOperator operator, Quantifier quantifier, RelNode query)	Convenience constructor for tests; uses SourceLocation.UNKNOWN.
QuantifiedPredicate(Operand left, ComparisonOperator operator, Quantifier quantifier, RelNode query, SourceLocation location)	Creates an instance of a QuantifiedPredicate record class.

Method Summary

Modifier and Type	Method	Description
<R> R	accept(PredicateVisitor<R> visitor)
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
final int	hashCode()	Returns a hash code value for this object.
Operand	left()	Returns the value of the left record component.
SourceLocation	location()	Returns the value of the location record component.
ComparisonOperator	operator()	Returns the value of the operator record component.
Quantifier	quantifier()	Returns the value of the quantifier record component.
RelNode	query()	Returns the value of the query record component.
final String	toString()	Returns a string representation of this record class.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

QuantifiedPredicate

public QuantifiedPredicate(Operand left,
 ComparisonOperator operator,
 Quantifier quantifier,
 RelNode query,
 SourceLocation location)

Creates an instance of a QuantifiedPredicate record class.

Parameters:

left - the value for the left record component

operator - the value for the operator record component

quantifier - the value for the quantifier record component

query - the value for the query record component

location - the value for the location record component

QuantifiedPredicate

public QuantifiedPredicate(Operand left,
 ComparisonOperator operator,
 Quantifier quantifier,
 RelNode query)

Convenience constructor for tests; uses SourceLocation.UNKNOWN.

Method Details

accept

public <R> R accept(PredicateVisitor<R> visitor)

Specified by:

accept in interface Predicate

toString

public final String toString()

Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.

Specified by:

toString in class Record

Returns:

a string representation of this object

hashCode

public final int hashCode()

Returns a hash code value for this object. The value is derived from the hash code of each of the record components.

Specified by:

hashCode in class Record

Returns:

a hash code value for this object

equals

public final boolean equals(Object o)

Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).

Specified by:

equals in class Record

Parameters:

o - the object with which to compare

Returns:

true if this object is the same as the o argument; false otherwise.

left

public Operand left()

Returns the value of the left record component.

Returns:

the value of the left record component

operator

public ComparisonOperator operator()

Returns the value of the operator record component.

Returns:

the value of the operator record component

quantifier

public Quantifier quantifier()

Returns the value of the quantifier record component.

Returns:

the value of the quantifier record component

query

public RelNode query()

Returns the value of the query record component.

Returns:

the value of the query record component

location

public SourceLocation location()

Returns the value of the location record component.

Specified by:

location in interface Predicate

Returns:

the value of the location record component