Package io.trino.sql.ir

Record Class Bind

java.lang.Object

java.lang.Record

io.trino.sql.ir.Bind

All Implemented Interfaces:

Expression

public record Bind(List<Expression> values, Lambda function)
extends Record
implements Expression

Bind(values, targetFunction)

When invoked, the returned function inserts the given values as the leading arguments to the targetFunction. The other arguments are passed unchanged.

Bind is fundamentally first class, just like function applications. It requires special treatment from the type system. There is no way to write out the type of `bind`. The return type of `bind` is function. Its type looks somewhat like:

• X, (X) -> Y => () -> Y
• X1, (X1, X2) -> Y => (X2) -> Y
• X1, (X1, X2, X3) -> Y => (X2, X3) -> Y
• X1, (X1, X2, X3, X4) -> Y => (X2, X3, X4) -> Y
• ...

Lambda capturing is implemented through desugaring in Trino. This expression facilitates desugaring.

Constructor Summary

Constructors

Constructor	Description
Bind(List<Expression> values, Lambda function)	Creates an instance of a Bind record class.

Method Summary

Modifier and Type	Method	Description
<R, C> R	accept(IrVisitor<R,C> visitor, C context)	Accessible for IrVisitor, use IrVisitor.process(Expression, Object) instead.
List<? extends Expression>	children()
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
Lambda	function()	Returns the value of the function record component.
final int	hashCode()	Returns a hash code value for this object.
String	toString()	Returns a string representation of this record class.
Type	type()
List<Expression>	values()	Returns the value of the values record component.

Methods inherited from class java.lang.Object

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

Constructor Details

Bind

public Bind(List<Expression> values,
 Lambda function)

Creates an instance of a Bind record class.

Parameters:

values - the value for the values record component

function - the value for the function record component

Method Details

type

public Type type()

Specified by:

type in interface Expression

accept

public <R,
C> R accept(IrVisitor<R,C> visitor,
 C context)

Description copied from interface: Expression

Accessible for IrVisitor, use IrVisitor.process(Expression, Object) instead.

Specified by:

accept in interface Expression

children

public List<? extends Expression> children()

Specified by:

children in interface Expression

toString

public 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.

values

public List<Expression> values()

Returns the value of the values record component.

Returns:

the value of the values record component

function

public Lambda function()

Returns the value of the function record component.

Returns:

the value of the function record component