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 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