Module com.darkcollective.relix.plan
Package com.darkcollective.relix.plan

Record Class PhysicalNode.Why

java.lang.Object
java.lang.Record
com.darkcollective.relix.plan.PhysicalNode.Why
All Implemented Interfaces:
PhysicalNode
Enclosing interface:
PhysicalNode
public static record PhysicalNode.Why(Schema schema, RelNode logicalInput) extends Record implements PhysicalNode
Lineage reification (WHY): emits every result tuple of its input unchanged plus the reserved provenance:ANY column holding that tuple's lineage polynomial as a nested document. Output schema = input schema + the provenance column.

WHY is a self-terminating reification boundary: its input is carried as the logical RelNode subtree (logicalInput()), because the executor evaluates it as a lineage K-relation through the separate ProvenanceEvaluator path (threading the polynomial semiring, inlining views, reading non-positive operators as opaque bases) rather than through the streaming physical executor. The subtree therefore has no physical children and is never pushed to a source (pushing would compute the rows in the backend and lose the row-level lineage). Blocking; a hard optimizer barrier (no pass rewrites inside or across it).

  • Constructor Details

    • Why

      public Why(Schema schema, RelNode logicalInput)
      Creates an instance of a Why record class.
      Parameters:
      schema - the value for the schema record component
      logicalInput - the value for the logicalInput record component

  • Method Details

    • children

      public List<PhysicalNode> children()
      Description copied from interface: PhysicalNode
      Direct child plans, left-to-right; empty for a PhysicalNode.Scan.
      Specified by:
      children in interface PhysicalNode

    • 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.

    • schema

      public Schema schema()
      Returns the value of the schema record component.
      Specified by:
      schema in interface PhysicalNode
      Returns:
      the value of the schema record component

    • logicalInput

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