All Implemented Interfaces:
NamedWriteable, Writeable, PostAnalysisVerificationAware, TelemetryAware, Resolvable

public class Row extends LeafPlan implements PostAnalysisVerificationAware, TelemetryAware
  • Constructor Details

  • Method Details

    • writeTo

      public void writeTo(StreamOutput out)
      Specified by:
      writeTo in interface Writeable
    • getWriteableName

      public String getWriteableName()
      Specified by:
      getWriteableName in interface NamedWriteable
    • fields

      public List<Alias> fields()
    • output

      public List<Attribute> output()
      Description copied from class: QueryPlan
      The ordered list of attributes (i.e. columns) this plan produces when executed. Must be called only on resolved plans, otherwise may throw an exception or return wrong results.
      Specified by:
      output in class QueryPlan<LogicalPlan>
    • expressionsResolved

      public boolean expressionsResolved()
      Specified by:
      expressionsResolved in class LogicalPlan
    • info

      protected NodeInfo<? extends LogicalPlan> info()
      Specified by:
      info in class Node<LogicalPlan>
    • equals

      public boolean equals(Object o)
      Specified by:
      equals in class LogicalPlan
    • hashCode

      public int hashCode()
      Specified by:
      hashCode in class LogicalPlan
    • postAnalysisVerification

      public void postAnalysisVerification(Failures failures)
      Description copied from interface: PostAnalysisVerificationAware
      Allows the implementer to validate itself. This usually involves checking its internal setup, which often means checking the parameters it received on construction: their data or syntactic type, class, their count, expressions' structure etc. The discovered failures are added to the given Failures object.

      It is often more useful to perform the checks as extended as it makes sense, over stopping at the first failure. This will allow the author to progress faster to a correct query.

      Example: the Filter class, which models the WHERE command, checks that the expression it filters on - condition - is of a Boolean or NULL type:

           
           @Override
           void postAnalysisVerification(Failures failures) {
                if (condition.dataType() != NULL && condition.dataType() != BOOLEAN) {
                    failures.add(fail(condition, "Condition expression needs to be boolean, found [{}]", condition.dataType()));
                }
           }
           
           
      Specified by:
      postAnalysisVerification in interface PostAnalysisVerificationAware
      Parameters:
      failures - the object to add failures to.