BindExpression (presto-parser 335 API)

java.lang.Object
- io.prestosql.sql.tree.Node
- - io.prestosql.sql.tree.Expression
  - - io.prestosql.sql.tree.BindExpression

```
public class BindExpression
extends Expression
```
"$INTERNAL$BIND"(value, targetFunction)
When invoked, the returned function inserts the given value as the leading argument 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 Presto. This expression facilitates desugaring.

Constructor Summary

Constructors
Constructor	Description
`BindExpression(NodeLocation location, java.util.List<Expression> values, Expression function)`
`BindExpression(java.util.List<Expression> values, Expression function)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`<R,C> R`	`accept(AstVisitor<R,C> visitor, C context)`	Accessible for `AstVisitor`, use `AstVisitor.process(Node, Object)` instead.
`boolean`	`equals(java.lang.Object o)`
`java.util.List<Node>`	`getChildren()`
`Expression`	`getFunction()`
`java.util.List<Expression>`	`getValues()`
`int`	`hashCode()`

Methods inherited from class io.prestosql.sql.tree.Expression
toString

Methods inherited from class io.prestosql.sql.tree.Node
getLocation

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BindExpression

public BindExpression(java.util.List<Expression> values,
                      Expression function)

BindExpression

public BindExpression(NodeLocation location,
                      java.util.List<Expression> values,
                      Expression function)

Method Detail
- getValues
```
public java.util.List<Expression> getValues()
```
- getFunction
```
public Expression getFunction()
```
- accept
```
public <R,C> R accept(AstVisitor<R,C> visitor,
                            C context)
```
  Description copied from class: Expression
  
  Accessible for AstVisitor, use AstVisitor.process(Node, Object) instead.
  
  Overrides:
  
  accept in class Expression
- getChildren
```
public java.util.List<Node> getChildren()
```
  Specified by:
  
  getChildren in class Node
- equals
```
public boolean equals(java.lang.Object o)
```
  Specified by:
  
  equals in class Node
- hashCode
```
public int hashCode()
```
  Specified by:
  
  hashCode in class Node