Module com.darkcollective.relix.lang.ast
Package com.darkcollective.relix.lang.ast

Record Class QueryAssignmentBody

java.lang.Object
java.lang.Record
com.darkcollective.relix.lang.ast.QueryAssignmentBody
Record Components:
expression - the parsed RA expression; must not be null
All Implemented Interfaces:
AssignmentBody
public record QueryAssignmentBody(RelNode expression) extends Record implements AssignmentBody
An assignment body that holds a parsed relational algebra expression.

The expression is represented as a fully-parsed RelNode, produced by delegating the content of the { ... } block to the existing RelAlgebraParser.

Example: ActiveUsers := { σ status = "active" (Users) };

  • Constructor Details

    • QueryAssignmentBody

      public QueryAssignmentBody(RelNode expression)
      Creates an instance of a QueryAssignmentBody record class.
      Parameters:
      expression - the value for the expression record component

  • Method Details

    • 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.

    • expression

      public RelNode expression()
      Returns the value of the expression record component.
      Returns:
      the value of the expression record component